diff --git a/dist/filer-perf.js b/dist/filer-perf.js
deleted file mode 100644
index d59041c..0000000
--- a/dist/filer-perf.js
+++ /dev/null
@@ -1,10243 +0,0 @@
-(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.Filer = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
-/*global setImmediate: false, setTimeout: false, console: false */
-
-/**
- * async.js shim, based on https://raw.github.com/caolan/async/master/lib/async.js Feb 18, 2014
- * Used under MIT - https://github.com/caolan/async/blob/master/LICENSE
- */
-
-(function () {
-
-    var async = {};
-
-    // async.js functions used in Filer
-
-    //// nextTick implementation with browser-compatible fallback ////
-    if (typeof process === 'undefined' || !(process.nextTick)) {
-        if (typeof setImmediate === 'function') {
-            async.nextTick = function (fn) {
-                // not a direct alias for IE10 compatibility
-                setImmediate(fn);
-            };
-            async.setImmediate = async.nextTick;
-        }
-        else {
-            async.nextTick = function (fn) {
-                setTimeout(fn, 0);
-            };
-            async.setImmediate = async.nextTick;
-        }
-    }
-    else {
-        async.nextTick = process.nextTick;
-        if (typeof setImmediate !== 'undefined') {
-            async.setImmediate = function (fn) {
-              // not a direct alias for IE10 compatibility
-              setImmediate(fn);
-            };
-        }
-        else {
-            async.setImmediate = async.nextTick;
-        }
-    }
-
-    async.eachSeries = function (arr, iterator, callback) {
-        callback = callback || function () {};
-        if (!arr.length) {
-            return callback();
-        }
-        var completed = 0;
-        var iterate = function () {
-            iterator(arr[completed], function (err) {
-                if (err) {
-                    callback(err);
-                    callback = function () {};
-                }
-                else {
-                    completed += 1;
-                    if (completed >= arr.length) {
-                        callback();
-                    }
-                    else {
-                        iterate();
-                    }
-                }
-            });
-        };
-        iterate();
-    };
-    async.forEachSeries = async.eachSeries;
-
-    // AMD / RequireJS
-    if (typeof define !== 'undefined' && define.amd) {
-        define([], function () {
-            return async;
-        });
-    }
-    // Node.js
-    else if (typeof module !== 'undefined' && module.exports) {
-        module.exports = async;
-    }
-    // included directly via <script> tag
-    else {
-        root.async = async;
-    }
-
-}());
-
-},{}],2:[function(require,module,exports){
-// Based on https://github.com/diy/intercom.js/blob/master/lib/events.js
-// Copyright 2012 DIY Co Apache License, Version 2.0
-// http://www.apache.org/licenses/LICENSE-2.0
-
-function removeItem(item, array) {
-  for (var i = array.length - 1; i >= 0; i--) {
-    if (array[i] === item) {
-      array.splice(i, 1);
-    }
-  }
-  return array;
-}
-
-var EventEmitter = function() {};
-
-EventEmitter.createInterface = function(space) {
-  var methods = {};
-
-  methods.on = function(name, fn) {
-    if (typeof this[space] === 'undefined') {
-      this[space] = {};
-    }
-    if (!this[space].hasOwnProperty(name)) {
-      this[space][name] = [];
-    }
-    this[space][name].push(fn);
-  };
-
-  methods.off = function(name, fn) {
-    if (typeof this[space] === 'undefined') return;
-    if (this[space].hasOwnProperty(name)) {
-      removeItem(fn, this[space][name]);
-    }
-  };
-
-  methods.trigger = function(name) {
-    if (typeof this[space] !== 'undefined' && this[space].hasOwnProperty(name)) {
-      var args = Array.prototype.slice.call(arguments, 1);
-      for (var i = 0; i < this[space][name].length; i++) {
-        this[space][name][i].apply(this[space][name][i], args);
-      }
-    }
-  };
-
-  methods.removeAllListeners = function(name) {
-    if (typeof this[space] === 'undefined') return;
-    var self = this;
-    self[space][name].forEach(function(fn) {
-      self.off(name, fn);
-    });
-  };
-
-  return methods;
-};
-
-var pvt = EventEmitter.createInterface('_handlers');
-EventEmitter.prototype._on = pvt.on;
-EventEmitter.prototype._off = pvt.off;
-EventEmitter.prototype._trigger = pvt.trigger;
-
-var pub = EventEmitter.createInterface('handlers');
-EventEmitter.prototype.on = function() {
-  pub.on.apply(this, arguments);
-  Array.prototype.unshift.call(arguments, 'on');
-  this._trigger.apply(this, arguments);
-};
-EventEmitter.prototype.off = pub.off;
-EventEmitter.prototype.trigger = pub.trigger;
-EventEmitter.prototype.removeAllListeners = pub.removeAllListeners;
-
-module.exports = EventEmitter;
-
-},{}],3:[function(require,module,exports){
-(function (global){
-// Based on https://github.com/diy/intercom.js/blob/master/lib/intercom.js
-// Copyright 2012 DIY Co Apache License, Version 2.0
-// http://www.apache.org/licenses/LICENSE-2.0
-
-var EventEmitter = require('./eventemitter.js');
-var guid = require('../src/shared.js').guid;
-
-function throttle(delay, fn) {
-  var last = 0;
-  return function() {
-    var now = Date.now();
-    if (now - last > delay) {
-      last = now;
-      fn.apply(this, arguments);
-    }
-  };
-}
-
-function extend(a, b) {
-  if (typeof a === 'undefined' || !a) { a = {}; }
-  if (typeof b === 'object') {
-    for (var key in b) {
-      if (b.hasOwnProperty(key)) {
-        a[key] = b[key];
-      }
-    }
-  }
-  return a;
-}
-
-var localStorage = (function(window) {
-  if (typeof window === 'undefined' ||
-      typeof window.localStorage === 'undefined') {
-    return {
-      getItem : function() {},
-      setItem : function() {},
-      removeItem : function() {}
-    };
-  }
-  return window.localStorage;
-}(global));
-
-function Intercom() {
-  var self = this;
-  var now = Date.now();
-
-  this.origin         = guid();
-  this.lastMessage    = now;
-  this.receivedIDs    = {};
-  this.previousValues = {};
-
-  var storageHandler = function() {
-    self._onStorageEvent.apply(self, arguments);
-  };
-
-  // If we're in node.js, skip event registration
-  if (typeof document === 'undefined') {
-    return;
-  }
-
-  if (document.attachEvent) {
-    document.attachEvent('onstorage', storageHandler);
-  } else {
-    global.addEventListener('storage', storageHandler, false);
-  }
-}
-
-Intercom.prototype._transaction = function(fn) {
-  var TIMEOUT   = 1000;
-  var WAIT      = 20;
-  var self      = this;
-  var executed  = false;
-  var listening = false;
-  var waitTimer = null;
-
-  function lock() {
-    if (executed) {
-      return;
-    }
-
-    var now = Date.now();
-    var activeLock = localStorage.getItem(INDEX_LOCK)|0;
-    if (activeLock && now - activeLock < TIMEOUT) {
-      if (!listening) {
-        self._on('storage', lock);
-        listening = true;
-      }
-      waitTimer = setTimeout(lock, WAIT);
-      return;
-    }
-    executed = true;
-    localStorage.setItem(INDEX_LOCK, now);
-
-    fn();
-    unlock();
-  }
-
-  function unlock() {
-    if (listening) {
-      self._off('storage', lock);
-    }
-    if (waitTimer) {
-      clearTimeout(waitTimer);
-    }
-    localStorage.removeItem(INDEX_LOCK);
-  }
-
-  lock();
-};
-
-Intercom.prototype._cleanup_emit = throttle(100, function() {
-  var self = this;
-
-  self._transaction(function() {
-    var now = Date.now();
-    var threshold = now - THRESHOLD_TTL_EMIT;
-    var changed = 0;
-    var messages;
-
-    try {
-      messages = JSON.parse(localStorage.getItem(INDEX_EMIT) || '[]');
-    } catch(e) {
-      messages = [];
-    }
-    for (var i = messages.length - 1; i >= 0; i--) {
-      if (messages[i].timestamp < threshold) {
-        messages.splice(i, 1);
-        changed++;
-      }
-    }
-    if (changed > 0) {
-      localStorage.setItem(INDEX_EMIT, JSON.stringify(messages));
-    }
-  });
-});
-
-Intercom.prototype._cleanup_once = throttle(100, function() {
-  var self = this;
-
-  self._transaction(function() {
-    var timestamp, ttl, key;
-    var table;
-    var now  = Date.now();
-    var changed = 0;
-
-    try {
-      table = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');
-    } catch(e) {
-      table = {};
-    }
-    for (key in table) {
-      if (self._once_expired(key, table)) {
-        delete table[key];
-        changed++;
-      }
-    }
-
-    if (changed > 0) {
-      localStorage.setItem(INDEX_ONCE, JSON.stringify(table));
-    }
-  });
-});
-
-Intercom.prototype._once_expired = function(key, table) {
-  if (!table) {
-    return true;
-  }
-  if (!table.hasOwnProperty(key)) {
-    return true;
-  }
-  if (typeof table[key] !== 'object') {
-    return true;
-  }
-
-  var ttl = table[key].ttl || THRESHOLD_TTL_ONCE;
-  var now = Date.now();
-  var timestamp = table[key].timestamp;
-  return timestamp < now - ttl;
-};
-
-Intercom.prototype._localStorageChanged = function(event, field) {
-  if (event && event.key) {
-    return event.key === field;
-  }
-
-  var currentValue = localStorage.getItem(field);
-  if (currentValue === this.previousValues[field]) {
-    return false;
-  }
-  this.previousValues[field] = currentValue;
-  return true;
-};
-
-Intercom.prototype._onStorageEvent = function(event) {
-  event = event || global.event;
-  var self = this;
-
-  if (this._localStorageChanged(event, INDEX_EMIT)) {
-    this._transaction(function() {
-      var now = Date.now();
-      var data = localStorage.getItem(INDEX_EMIT);
-      var messages;
-
-      try {
-        messages = JSON.parse(data || '[]');
-      } catch(e) {
-        messages = [];
-      }
-      for (var i = 0; i < messages.length; i++) {
-        if (messages[i].origin === self.origin) continue;
-        if (messages[i].timestamp < self.lastMessage) continue;
-        if (messages[i].id) {
-          if (self.receivedIDs.hasOwnProperty(messages[i].id)) continue;
-          self.receivedIDs[messages[i].id] = true;
-        }
-        self.trigger(messages[i].name, messages[i].payload);
-      }
-      self.lastMessage = now;
-    });
-  }
-
-  this._trigger('storage', event);
-};
-
-Intercom.prototype._emit = function(name, message, id) {
-  id = (typeof id === 'string' || typeof id === 'number') ? String(id) : null;
-  if (id && id.length) {
-    if (this.receivedIDs.hasOwnProperty(id)) return;
-    this.receivedIDs[id] = true;
-  }
-
-  var packet = {
-    id        : id,
-    name      : name,
-    origin    : this.origin,
-    timestamp : Date.now(),
-    payload   : message
-  };
-
-  var self = this;
-  this._transaction(function() {
-    var data = localStorage.getItem(INDEX_EMIT) || '[]';
-    var delimiter = (data === '[]') ? '' : ',';
-    data = [data.substring(0, data.length - 1), delimiter, JSON.stringify(packet), ']'].join('');
-    localStorage.setItem(INDEX_EMIT, data);
-    self.trigger(name, message);
-
-    setTimeout(function() {
-      self._cleanup_emit();
-    }, 50);
-  });
-};
-
-Intercom.prototype.emit = function(name, message) {
-  this._emit.apply(this, arguments);
-  this._trigger('emit', name, message);
-};
-
-Intercom.prototype.once = function(key, fn, ttl) {
-  if (!Intercom.supported) {
-    return;
-  }
-
-  var self = this;
-  this._transaction(function() {
-    var data;
-    try {
-      data = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');
-    } catch(e) {
-      data = {};
-    }
-    if (!self._once_expired(key, data)) {
-      return;
-    }
-
-    data[key] = {};
-    data[key].timestamp = Date.now();
-    if (typeof ttl === 'number') {
-      data[key].ttl = ttl * 1000;
-    }
-
-    localStorage.setItem(INDEX_ONCE, JSON.stringify(data));
-    fn();
-
-    setTimeout(function() {
-      self._cleanup_once();
-    }, 50);
-  });
-};
-
-extend(Intercom.prototype, EventEmitter.prototype);
-
-Intercom.supported = (typeof localStorage !== 'undefined');
-
-var INDEX_EMIT = 'intercom';
-var INDEX_ONCE = 'intercom_once';
-var INDEX_LOCK = 'intercom_lock';
-
-var THRESHOLD_TTL_EMIT = 50000;
-var THRESHOLD_TTL_ONCE = 1000 * 3600;
-
-Intercom.destroy = function() {
-  localStorage.removeItem(INDEX_LOCK);
-  localStorage.removeItem(INDEX_EMIT);
-  localStorage.removeItem(INDEX_ONCE);
-};
-
-Intercom.getInstance = (function() {
-  var intercom;
-  return function() {
-    if (!intercom) {
-      intercom = new Intercom();
-    }
-    return intercom;
-  };
-})();
-
-module.exports = Intercom;
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../src/shared.js":36,"./eventemitter.js":2}],4:[function(require,module,exports){
-// Cherry-picked bits of underscore.js, lodash.js
-
-/**
- * Lo-Dash 2.4.0 <http://lodash.com/>
- * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
- * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- * Available under MIT license <http://lodash.com/license>
- */
-var ArrayProto = Array.prototype;
-var nativeForEach = ArrayProto.forEach;
-var nativeIndexOf = ArrayProto.indexOf;
-var nativeSome = ArrayProto.some;
-
-var ObjProto = Object.prototype;
-var hasOwnProperty = ObjProto.hasOwnProperty;
-var nativeKeys = Object.keys;
-
-var breaker = {};
-
-function has(obj, key) {
-  return hasOwnProperty.call(obj, key);
-}
-
-var keys = nativeKeys || function(obj) {
-  if (obj !== Object(obj)) throw new TypeError('Invalid object');
-  var keys = [];
-  for (var key in obj) if (has(obj, key)) keys.push(key);
-  return keys;
-};
-
-function size(obj) {
-  if (obj == null) return 0;
-  return (obj.length === +obj.length) ? obj.length : keys(obj).length;
-}
-
-function identity(value) {
-  return value;
-}
-
-function each(obj, iterator, context) {
-  var i, length;
-  if (obj == null) return;
-  if (nativeForEach && obj.forEach === nativeForEach) {
-    obj.forEach(iterator, context);
-  } else if (obj.length === +obj.length) {
-    for (i = 0, length = obj.length; i < length; i++) {
-      if (iterator.call(context, obj[i], i, obj) === breaker) return;
-    }
-  } else {
-    var keys = keys(obj);
-    for (i = 0, length = keys.length; i < length; i++) {
-      if (iterator.call(context, obj[keys[i]], keys[i], obj) === breaker) return;
-    }
-  }
-};
-
-function any(obj, iterator, context) {
-  iterator || (iterator = identity);
-  var result = false;
-  if (obj == null) return result;
-  if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
-  each(obj, function(value, index, list) {
-    if (result || (result = iterator.call(context, value, index, list))) return breaker;
-  });
-  return !!result;
-};
-
-function contains(obj, target) {
-  if (obj == null) return false;
-  if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
-  return any(obj, function(value) {
-    return value === target;
-  });
-};
-
-function Wrapped(value) {
-  this.value = value;
-}
-Wrapped.prototype.has = function(key) {
-  return has(this.value, key);
-};
-Wrapped.prototype.contains = function(target) {
-  return contains(this.value, target);
-};
-Wrapped.prototype.size = function() {
-  return size(this.value);
-};
-
-function nodash(value) {
-  // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor
-  return (value && typeof value == 'object' && !Array.isArray(value) && hasOwnProperty.call(value, '__wrapped__'))
-    ? value
-    : new Wrapped(value);
-}
-
-module.exports = nodash;
-
-},{}],5:[function(require,module,exports){
-/*
- * base64-arraybuffer
- * https://github.com/niklasvh/base64-arraybuffer
- *
- * Copyright (c) 2012 Niklas von Hertzen
- * Licensed under the MIT license.
- */
-(function(){
-  "use strict";
-
-  var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-  // Use a lookup table to find the index.
-  var lookup = new Uint8Array(256);
-  for (var i = 0; i < chars.length; i++) {
-    lookup[chars.charCodeAt(i)] = i;
-  }
-
-  exports.encode = function(arraybuffer) {
-    var bytes = new Uint8Array(arraybuffer),
-    i, len = bytes.length, base64 = "";
-
-    for (i = 0; i < len; i+=3) {
-      base64 += chars[bytes[i] >> 2];
-      base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
-      base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
-      base64 += chars[bytes[i + 2] & 63];
-    }
-
-    if ((len % 3) === 2) {
-      base64 = base64.substring(0, base64.length - 1) + "=";
-    } else if (len % 3 === 1) {
-      base64 = base64.substring(0, base64.length - 2) + "==";
-    }
-
-    return base64;
-  };
-
-  exports.decode =  function(base64) {
-    var bufferLength = base64.length * 0.75,
-    len = base64.length, i, p = 0,
-    encoded1, encoded2, encoded3, encoded4;
-
-    if (base64[base64.length - 1] === "=") {
-      bufferLength--;
-      if (base64[base64.length - 2] === "=") {
-        bufferLength--;
-      }
-    }
-
-    var arraybuffer = new ArrayBuffer(bufferLength),
-    bytes = new Uint8Array(arraybuffer);
-
-    for (i = 0; i < len; i+=4) {
-      encoded1 = lookup[base64.charCodeAt(i)];
-      encoded2 = lookup[base64.charCodeAt(i+1)];
-      encoded3 = lookup[base64.charCodeAt(i+2)];
-      encoded4 = lookup[base64.charCodeAt(i+3)];
-
-      bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
-      bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
-      bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
-    }
-
-    return arraybuffer;
-  };
-})();
-
-},{}],6:[function(require,module,exports){
-var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
-
-;(function (exports) {
-	'use strict';
-
-  var Arr = (typeof Uint8Array !== 'undefined')
-    ? Uint8Array
-    : Array
-
-	var PLUS   = '+'.charCodeAt(0)
-	var SLASH  = '/'.charCodeAt(0)
-	var NUMBER = '0'.charCodeAt(0)
-	var LOWER  = 'a'.charCodeAt(0)
-	var UPPER  = 'A'.charCodeAt(0)
-	var PLUS_URL_SAFE = '-'.charCodeAt(0)
-	var SLASH_URL_SAFE = '_'.charCodeAt(0)
-
-	function decode (elt) {
-		var code = elt.charCodeAt(0)
-		if (code === PLUS ||
-		    code === PLUS_URL_SAFE)
-			return 62 // '+'
-		if (code === SLASH ||
-		    code === SLASH_URL_SAFE)
-			return 63 // '/'
-		if (code < NUMBER)
-			return -1 //no match
-		if (code < NUMBER + 10)
-			return code - NUMBER + 26 + 26
-		if (code < UPPER + 26)
-			return code - UPPER
-		if (code < LOWER + 26)
-			return code - LOWER + 26
-	}
-
-	function b64ToByteArray (b64) {
-		var i, j, l, tmp, placeHolders, arr
-
-		if (b64.length % 4 > 0) {
-			throw new Error('Invalid string. Length must be a multiple of 4')
-		}
-
-		// the number of equal signs (place holders)
-		// if there are two placeholders, than the two characters before it
-		// represent one byte
-		// if there is only one, then the three characters before it represent 2 bytes
-		// this is just a cheap hack to not do indexOf twice
-		var len = b64.length
-		placeHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0
-
-		// base64 is 4/3 + up to two characters of the original data
-		arr = new Arr(b64.length * 3 / 4 - placeHolders)
-
-		// if there are placeholders, only get up to the last complete 4 chars
-		l = placeHolders > 0 ? b64.length - 4 : b64.length
-
-		var L = 0
-
-		function push (v) {
-			arr[L++] = v
-		}
-
-		for (i = 0, j = 0; i < l; i += 4, j += 3) {
-			tmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))
-			push((tmp & 0xFF0000) >> 16)
-			push((tmp & 0xFF00) >> 8)
-			push(tmp & 0xFF)
-		}
-
-		if (placeHolders === 2) {
-			tmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)
-			push(tmp & 0xFF)
-		} else if (placeHolders === 1) {
-			tmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)
-			push((tmp >> 8) & 0xFF)
-			push(tmp & 0xFF)
-		}
-
-		return arr
-	}
-
-	function uint8ToBase64 (uint8) {
-		var i,
-			extraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes
-			output = "",
-			temp, length
-
-		function encode (num) {
-			return lookup.charAt(num)
-		}
-
-		function tripletToBase64 (num) {
-			return encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)
-		}
-
-		// go through the array every three bytes, we'll deal with trailing stuff later
-		for (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {
-			temp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
-			output += tripletToBase64(temp)
-		}
-
-		// pad the end with zeros, but make sure to not forget the extra bytes
-		switch (extraBytes) {
-			case 1:
-				temp = uint8[uint8.length - 1]
-				output += encode(temp >> 2)
-				output += encode((temp << 4) & 0x3F)
-				output += '=='
-				break
-			case 2:
-				temp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])
-				output += encode(temp >> 10)
-				output += encode((temp >> 4) & 0x3F)
-				output += encode((temp << 2) & 0x3F)
-				output += '='
-				break
-		}
-
-		return output
-	}
-
-	exports.toByteArray = b64ToByteArray
-	exports.fromByteArray = uint8ToBase64
-}(typeof exports === 'undefined' ? (this.base64js = {}) : exports))
-
-},{}],7:[function(require,module,exports){
-(function (global){
-/*!
- * The buffer module from node.js, for the browser.
- *
- * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
- * @license  MIT
- */
-/* eslint-disable no-proto */
-
-'use strict'
-
-var base64 = require('base64-js')
-var ieee754 = require('ieee754')
-var isArray = require('isarray')
-
-exports.Buffer = Buffer
-exports.SlowBuffer = SlowBuffer
-exports.INSPECT_MAX_BYTES = 50
-Buffer.poolSize = 8192 // not used by this implementation
-
-var rootParent = {}
-
-/**
- * If `Buffer.TYPED_ARRAY_SUPPORT`:
- *   === true    Use Uint8Array implementation (fastest)
- *   === false   Use Object implementation (most compatible, even IE6)
- *
- * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
- * Opera 11.6+, iOS 4.2+.
- *
- * Due to various browser bugs, sometimes the Object implementation will be used even
- * when the browser supports typed arrays.
- *
- * Note:
- *
- *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
- *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
- *
- *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property
- *     on objects.
- *
- *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
- *
- *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
- *     incorrect length in some situations.
-
- * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
- * get the Object implementation, which is slower but behaves correctly.
- */
-Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
-  ? global.TYPED_ARRAY_SUPPORT
-  : typedArraySupport()
-
-function typedArraySupport () {
-  function Bar () {}
-  try {
-    var arr = new Uint8Array(1)
-    arr.foo = function () { return 42 }
-    arr.constructor = Bar
-    return arr.foo() === 42 && // typed array instances can be augmented
-        arr.constructor === Bar && // constructor can be set
-        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
-        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
-  } catch (e) {
-    return false
-  }
-}
-
-function kMaxLength () {
-  return Buffer.TYPED_ARRAY_SUPPORT
-    ? 0x7fffffff
-    : 0x3fffffff
-}
-
-/**
- * Class: Buffer
- * =============
- *
- * The Buffer constructor returns instances of `Uint8Array` that are augmented
- * with function properties for all the node `Buffer` API functions. We use
- * `Uint8Array` so that square bracket notation works as expected -- it returns
- * a single octet.
- *
- * By augmenting the instances, we can avoid modifying the `Uint8Array`
- * prototype.
- */
-function Buffer (arg) {
-  if (!(this instanceof Buffer)) {
-    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.
-    if (arguments.length > 1) return new Buffer(arg, arguments[1])
-    return new Buffer(arg)
-  }
-
-  if (!Buffer.TYPED_ARRAY_SUPPORT) {
-    this.length = 0
-    this.parent = undefined
-  }
-
-  // Common case.
-  if (typeof arg === 'number') {
-    return fromNumber(this, arg)
-  }
-
-  // Slightly less common case.
-  if (typeof arg === 'string') {
-    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')
-  }
-
-  // Unusual.
-  return fromObject(this, arg)
-}
-
-function fromNumber (that, length) {
-  that = allocate(that, length < 0 ? 0 : checked(length) | 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) {
-    for (var i = 0; i < length; i++) {
-      that[i] = 0
-    }
-  }
-  return that
-}
-
-function fromString (that, string, encoding) {
-  if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'
-
-  // Assumption: byteLength() return value is always < kMaxLength.
-  var length = byteLength(string, encoding) | 0
-  that = allocate(that, length)
-
-  that.write(string, encoding)
-  return that
-}
-
-function fromObject (that, object) {
-  if (Buffer.isBuffer(object)) return fromBuffer(that, object)
-
-  if (isArray(object)) return fromArray(that, object)
-
-  if (object == null) {
-    throw new TypeError('must start with number, buffer, array or string')
-  }
-
-  if (typeof ArrayBuffer !== 'undefined') {
-    if (object.buffer instanceof ArrayBuffer) {
-      return fromTypedArray(that, object)
-    }
-    if (object instanceof ArrayBuffer) {
-      return fromArrayBuffer(that, object)
-    }
-  }
-
-  if (object.length) return fromArrayLike(that, object)
-
-  return fromJsonObject(that, object)
-}
-
-function fromBuffer (that, buffer) {
-  var length = checked(buffer.length) | 0
-  that = allocate(that, length)
-  buffer.copy(that, 0, 0, length)
-  return that
-}
-
-function fromArray (that, array) {
-  var length = checked(array.length) | 0
-  that = allocate(that, length)
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
-
-// Duplicate of fromArray() to keep fromArray() monomorphic.
-function fromTypedArray (that, array) {
-  var length = checked(array.length) | 0
-  that = allocate(that, length)
-  // Truncating the elements is probably not what people expect from typed
-  // arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior
-  // of the old Buffer constructor.
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
-
-function fromArrayBuffer (that, array) {
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    array.byteLength
-    that = Buffer._augment(new Uint8Array(array))
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    that = fromTypedArray(that, new Uint8Array(array))
-  }
-  return that
-}
-
-function fromArrayLike (that, array) {
-  var length = checked(array.length) | 0
-  that = allocate(that, length)
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
-
-// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.
-// Returns a zero-length buffer for inputs that don't conform to the spec.
-function fromJsonObject (that, object) {
-  var array
-  var length = 0
-
-  if (object.type === 'Buffer' && isArray(object.data)) {
-    array = object.data
-    length = checked(array.length) | 0
-  }
-  that = allocate(that, length)
-
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
-
-if (Buffer.TYPED_ARRAY_SUPPORT) {
-  Buffer.prototype.__proto__ = Uint8Array.prototype
-  Buffer.__proto__ = Uint8Array
-} else {
-  // pre-set for values that may exist in the future
-  Buffer.prototype.length = undefined
-  Buffer.prototype.parent = undefined
-}
-
-function allocate (that, length) {
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    that = Buffer._augment(new Uint8Array(length))
-    that.__proto__ = Buffer.prototype
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    that.length = length
-    that._isBuffer = true
-  }
-
-  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1
-  if (fromPool) that.parent = rootParent
-
-  return that
-}
-
-function checked (length) {
-  // Note: cannot use `length < kMaxLength` here because that fails when
-  // length is NaN (which is otherwise coerced to zero.)
-  if (length >= kMaxLength()) {
-    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
-                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
-  }
-  return length | 0
-}
-
-function SlowBuffer (subject, encoding) {
-  if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)
-
-  var buf = new Buffer(subject, encoding)
-  delete buf.parent
-  return buf
-}
-
-Buffer.isBuffer = function isBuffer (b) {
-  return !!(b != null && b._isBuffer)
-}
-
-Buffer.compare = function compare (a, b) {
-  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
-    throw new TypeError('Arguments must be Buffers')
-  }
-
-  if (a === b) return 0
-
-  var x = a.length
-  var y = b.length
-
-  var i = 0
-  var len = Math.min(x, y)
-  while (i < len) {
-    if (a[i] !== b[i]) break
-
-    ++i
-  }
-
-  if (i !== len) {
-    x = a[i]
-    y = b[i]
-  }
-
-  if (x < y) return -1
-  if (y < x) return 1
-  return 0
-}
-
-Buffer.isEncoding = function isEncoding (encoding) {
-  switch (String(encoding).toLowerCase()) {
-    case 'hex':
-    case 'utf8':
-    case 'utf-8':
-    case 'ascii':
-    case 'binary':
-    case 'base64':
-    case 'raw':
-    case 'ucs2':
-    case 'ucs-2':
-    case 'utf16le':
-    case 'utf-16le':
-      return true
-    default:
-      return false
-  }
-}
-
-Buffer.concat = function concat (list, length) {
-  if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')
-
-  if (list.length === 0) {
-    return new Buffer(0)
-  }
-
-  var i
-  if (length === undefined) {
-    length = 0
-    for (i = 0; i < list.length; i++) {
-      length += list[i].length
-    }
-  }
-
-  var buf = new Buffer(length)
-  var pos = 0
-  for (i = 0; i < list.length; i++) {
-    var item = list[i]
-    item.copy(buf, pos)
-    pos += item.length
-  }
-  return buf
-}
-
-function byteLength (string, encoding) {
-  if (typeof string !== 'string') string = '' + string
-
-  var len = string.length
-  if (len === 0) return 0
-
-  // Use a for loop to avoid recursion
-  var loweredCase = false
-  for (;;) {
-    switch (encoding) {
-      case 'ascii':
-      case 'binary':
-      // Deprecated
-      case 'raw':
-      case 'raws':
-        return len
-      case 'utf8':
-      case 'utf-8':
-        return utf8ToBytes(string).length
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return len * 2
-      case 'hex':
-        return len >>> 1
-      case 'base64':
-        return base64ToBytes(string).length
-      default:
-        if (loweredCase) return utf8ToBytes(string).length // assume utf8
-        encoding = ('' + encoding).toLowerCase()
-        loweredCase = true
-    }
-  }
-}
-Buffer.byteLength = byteLength
-
-function slowToString (encoding, start, end) {
-  var loweredCase = false
-
-  start = start | 0
-  end = end === undefined || end === Infinity ? this.length : end | 0
-
-  if (!encoding) encoding = 'utf8'
-  if (start < 0) start = 0
-  if (end > this.length) end = this.length
-  if (end <= start) return ''
-
-  while (true) {
-    switch (encoding) {
-      case 'hex':
-        return hexSlice(this, start, end)
-
-      case 'utf8':
-      case 'utf-8':
-        return utf8Slice(this, start, end)
-
-      case 'ascii':
-        return asciiSlice(this, start, end)
-
-      case 'binary':
-        return binarySlice(this, start, end)
-
-      case 'base64':
-        return base64Slice(this, start, end)
-
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return utf16leSlice(this, start, end)
-
-      default:
-        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
-        encoding = (encoding + '').toLowerCase()
-        loweredCase = true
-    }
-  }
-}
-
-Buffer.prototype.toString = function toString () {
-  var length = this.length | 0
-  if (length === 0) return ''
-  if (arguments.length === 0) return utf8Slice(this, 0, length)
-  return slowToString.apply(this, arguments)
-}
-
-Buffer.prototype.equals = function equals (b) {
-  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
-  if (this === b) return true
-  return Buffer.compare(this, b) === 0
-}
-
-Buffer.prototype.inspect = function inspect () {
-  var str = ''
-  var max = exports.INSPECT_MAX_BYTES
-  if (this.length > 0) {
-    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
-    if (this.length > max) str += ' ... '
-  }
-  return '<Buffer ' + str + '>'
-}
-
-Buffer.prototype.compare = function compare (b) {
-  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
-  if (this === b) return 0
-  return Buffer.compare(this, b)
-}
-
-Buffer.prototype.indexOf = function indexOf (val, byteOffset) {
-  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff
-  else if (byteOffset < -0x80000000) byteOffset = -0x80000000
-  byteOffset >>= 0
-
-  if (this.length === 0) return -1
-  if (byteOffset >= this.length) return -1
-
-  // Negative offsets start from the end of the buffer
-  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)
-
-  if (typeof val === 'string') {
-    if (val.length === 0) return -1 // special case: looking for empty string always fails
-    return String.prototype.indexOf.call(this, val, byteOffset)
-  }
-  if (Buffer.isBuffer(val)) {
-    return arrayIndexOf(this, val, byteOffset)
-  }
-  if (typeof val === 'number') {
-    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {
-      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)
-    }
-    return arrayIndexOf(this, [ val ], byteOffset)
-  }
-
-  function arrayIndexOf (arr, val, byteOffset) {
-    var foundIndex = -1
-    for (var i = 0; byteOffset + i < arr.length; i++) {
-      if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {
-        if (foundIndex === -1) foundIndex = i
-        if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex
-      } else {
-        foundIndex = -1
-      }
-    }
-    return -1
-  }
-
-  throw new TypeError('val must be string, number or Buffer')
-}
-
-// `get` is deprecated
-Buffer.prototype.get = function get (offset) {
-  console.log('.get() is deprecated. Access using array indexes instead.')
-  return this.readUInt8(offset)
-}
-
-// `set` is deprecated
-Buffer.prototype.set = function set (v, offset) {
-  console.log('.set() is deprecated. Access using array indexes instead.')
-  return this.writeUInt8(v, offset)
-}
-
-function hexWrite (buf, string, offset, length) {
-  offset = Number(offset) || 0
-  var remaining = buf.length - offset
-  if (!length) {
-    length = remaining
-  } else {
-    length = Number(length)
-    if (length > remaining) {
-      length = remaining
-    }
-  }
-
-  // must be an even number of digits
-  var strLen = string.length
-  if (strLen % 2 !== 0) throw new Error('Invalid hex string')
-
-  if (length > strLen / 2) {
-    length = strLen / 2
-  }
-  for (var i = 0; i < length; i++) {
-    var parsed = parseInt(string.substr(i * 2, 2), 16)
-    if (isNaN(parsed)) throw new Error('Invalid hex string')
-    buf[offset + i] = parsed
-  }
-  return i
-}
-
-function utf8Write (buf, string, offset, length) {
-  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
-}
-
-function asciiWrite (buf, string, offset, length) {
-  return blitBuffer(asciiToBytes(string), buf, offset, length)
-}
-
-function binaryWrite (buf, string, offset, length) {
-  return asciiWrite(buf, string, offset, length)
-}
-
-function base64Write (buf, string, offset, length) {
-  return blitBuffer(base64ToBytes(string), buf, offset, length)
-}
-
-function ucs2Write (buf, string, offset, length) {
-  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
-}
-
-Buffer.prototype.write = function write (string, offset, length, encoding) {
-  // Buffer#write(string)
-  if (offset === undefined) {
-    encoding = 'utf8'
-    length = this.length
-    offset = 0
-  // Buffer#write(string, encoding)
-  } else if (length === undefined && typeof offset === 'string') {
-    encoding = offset
-    length = this.length
-    offset = 0
-  // Buffer#write(string, offset[, length][, encoding])
-  } else if (isFinite(offset)) {
-    offset = offset | 0
-    if (isFinite(length)) {
-      length = length | 0
-      if (encoding === undefined) encoding = 'utf8'
-    } else {
-      encoding = length
-      length = undefined
-    }
-  // legacy write(string, encoding, offset, length) - remove in v0.13
-  } else {
-    var swap = encoding
-    encoding = offset
-    offset = length | 0
-    length = swap
-  }
-
-  var remaining = this.length - offset
-  if (length === undefined || length > remaining) length = remaining
-
-  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
-    throw new RangeError('attempt to write outside buffer bounds')
-  }
-
-  if (!encoding) encoding = 'utf8'
-
-  var loweredCase = false
-  for (;;) {
-    switch (encoding) {
-      case 'hex':
-        return hexWrite(this, string, offset, length)
-
-      case 'utf8':
-      case 'utf-8':
-        return utf8Write(this, string, offset, length)
-
-      case 'ascii':
-        return asciiWrite(this, string, offset, length)
-
-      case 'binary':
-        return binaryWrite(this, string, offset, length)
-
-      case 'base64':
-        // Warning: maxLength not taken into account in base64Write
-        return base64Write(this, string, offset, length)
-
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return ucs2Write(this, string, offset, length)
-
-      default:
-        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
-        encoding = ('' + encoding).toLowerCase()
-        loweredCase = true
-    }
-  }
-}
-
-Buffer.prototype.toJSON = function toJSON () {
-  return {
-    type: 'Buffer',
-    data: Array.prototype.slice.call(this._arr || this, 0)
-  }
-}
-
-function base64Slice (buf, start, end) {
-  if (start === 0 && end === buf.length) {
-    return base64.fromByteArray(buf)
-  } else {
-    return base64.fromByteArray(buf.slice(start, end))
-  }
-}
-
-function utf8Slice (buf, start, end) {
-  end = Math.min(buf.length, end)
-  var res = []
-
-  var i = start
-  while (i < end) {
-    var firstByte = buf[i]
-    var codePoint = null
-    var bytesPerSequence = (firstByte > 0xEF) ? 4
-      : (firstByte > 0xDF) ? 3
-      : (firstByte > 0xBF) ? 2
-      : 1
-
-    if (i + bytesPerSequence <= end) {
-      var secondByte, thirdByte, fourthByte, tempCodePoint
-
-      switch (bytesPerSequence) {
-        case 1:
-          if (firstByte < 0x80) {
-            codePoint = firstByte
-          }
-          break
-        case 2:
-          secondByte = buf[i + 1]
-          if ((secondByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
-            if (tempCodePoint > 0x7F) {
-              codePoint = tempCodePoint
-            }
-          }
-          break
-        case 3:
-          secondByte = buf[i + 1]
-          thirdByte = buf[i + 2]
-          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
-            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
-              codePoint = tempCodePoint
-            }
-          }
-          break
-        case 4:
-          secondByte = buf[i + 1]
-          thirdByte = buf[i + 2]
-          fourthByte = buf[i + 3]
-          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
-            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
-              codePoint = tempCodePoint
-            }
-          }
-      }
-    }
-
-    if (codePoint === null) {
-      // we did not generate a valid codePoint so insert a
-      // replacement char (U+FFFD) and advance only 1 byte
-      codePoint = 0xFFFD
-      bytesPerSequence = 1
-    } else if (codePoint > 0xFFFF) {
-      // encode to utf16 (surrogate pair dance)
-      codePoint -= 0x10000
-      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
-      codePoint = 0xDC00 | codePoint & 0x3FF
-    }
-
-    res.push(codePoint)
-    i += bytesPerSequence
-  }
-
-  return decodeCodePointsArray(res)
-}
-
-// Based on http://stackoverflow.com/a/22747272/680742, the browser with
-// the lowest limit is Chrome, with 0x10000 args.
-// We go 1 magnitude less, for safety
-var MAX_ARGUMENTS_LENGTH = 0x1000
-
-function decodeCodePointsArray (codePoints) {
-  var len = codePoints.length
-  if (len <= MAX_ARGUMENTS_LENGTH) {
-    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
-  }
-
-  // Decode in chunks to avoid "call stack size exceeded".
-  var res = ''
-  var i = 0
-  while (i < len) {
-    res += String.fromCharCode.apply(
-      String,
-      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
-    )
-  }
-  return res
-}
-
-function asciiSlice (buf, start, end) {
-  var ret = ''
-  end = Math.min(buf.length, end)
-
-  for (var i = start; i < end; i++) {
-    ret += String.fromCharCode(buf[i] & 0x7F)
-  }
-  return ret
-}
-
-function binarySlice (buf, start, end) {
-  var ret = ''
-  end = Math.min(buf.length, end)
-
-  for (var i = start; i < end; i++) {
-    ret += String.fromCharCode(buf[i])
-  }
-  return ret
-}
-
-function hexSlice (buf, start, end) {
-  var len = buf.length
-
-  if (!start || start < 0) start = 0
-  if (!end || end < 0 || end > len) end = len
-
-  var out = ''
-  for (var i = start; i < end; i++) {
-    out += toHex(buf[i])
-  }
-  return out
-}
-
-function utf16leSlice (buf, start, end) {
-  var bytes = buf.slice(start, end)
-  var res = ''
-  for (var i = 0; i < bytes.length; i += 2) {
-    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
-  }
-  return res
-}
-
-Buffer.prototype.slice = function slice (start, end) {
-  var len = this.length
-  start = ~~start
-  end = end === undefined ? len : ~~end
-
-  if (start < 0) {
-    start += len
-    if (start < 0) start = 0
-  } else if (start > len) {
-    start = len
-  }
-
-  if (end < 0) {
-    end += len
-    if (end < 0) end = 0
-  } else if (end > len) {
-    end = len
-  }
-
-  if (end < start) end = start
-
-  var newBuf
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    newBuf = Buffer._augment(this.subarray(start, end))
-  } else {
-    var sliceLen = end - start
-    newBuf = new Buffer(sliceLen, undefined)
-    for (var i = 0; i < sliceLen; i++) {
-      newBuf[i] = this[i + start]
-    }
-  }
-
-  if (newBuf.length) newBuf.parent = this.parent || this
-
-  return newBuf
-}
-
-/*
- * Need to make sure that buffer isn't trying to write out of bounds.
- */
-function checkOffset (offset, ext, length) {
-  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
-  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
-}
-
-Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
-
-  var val = this[offset]
-  var mul = 1
-  var i = 0
-  while (++i < byteLength && (mul *= 0x100)) {
-    val += this[offset + i] * mul
-  }
-
-  return val
-}
-
-Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) {
-    checkOffset(offset, byteLength, this.length)
-  }
-
-  var val = this[offset + --byteLength]
-  var mul = 1
-  while (byteLength > 0 && (mul *= 0x100)) {
-    val += this[offset + --byteLength] * mul
-  }
-
-  return val
-}
-
-Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 1, this.length)
-  return this[offset]
-}
-
-Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  return this[offset] | (this[offset + 1] << 8)
-}
-
-Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  return (this[offset] << 8) | this[offset + 1]
-}
-
-Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-
-  return ((this[offset]) |
-      (this[offset + 1] << 8) |
-      (this[offset + 2] << 16)) +
-      (this[offset + 3] * 0x1000000)
-}
-
-Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-
-  return (this[offset] * 0x1000000) +
-    ((this[offset + 1] << 16) |
-    (this[offset + 2] << 8) |
-    this[offset + 3])
-}
-
-Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
-
-  var val = this[offset]
-  var mul = 1
-  var i = 0
-  while (++i < byteLength && (mul *= 0x100)) {
-    val += this[offset + i] * mul
-  }
-  mul *= 0x80
-
-  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
-
-  return val
-}
-
-Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
-
-  var i = byteLength
-  var mul = 1
-  var val = this[offset + --i]
-  while (i > 0 && (mul *= 0x100)) {
-    val += this[offset + --i] * mul
-  }
-  mul *= 0x80
-
-  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
-
-  return val
-}
-
-Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 1, this.length)
-  if (!(this[offset] & 0x80)) return (this[offset])
-  return ((0xff - this[offset] + 1) * -1)
-}
-
-Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  var val = this[offset] | (this[offset + 1] << 8)
-  return (val & 0x8000) ? val | 0xFFFF0000 : val
-}
-
-Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  var val = this[offset + 1] | (this[offset] << 8)
-  return (val & 0x8000) ? val | 0xFFFF0000 : val
-}
-
-Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-
-  return (this[offset]) |
-    (this[offset + 1] << 8) |
-    (this[offset + 2] << 16) |
-    (this[offset + 3] << 24)
-}
-
-Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-
-  return (this[offset] << 24) |
-    (this[offset + 1] << 16) |
-    (this[offset + 2] << 8) |
-    (this[offset + 3])
-}
-
-Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-  return ieee754.read(this, offset, true, 23, 4)
-}
-
-Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-  return ieee754.read(this, offset, false, 23, 4)
-}
-
-Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 8, this.length)
-  return ieee754.read(this, offset, true, 52, 8)
-}
-
-Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 8, this.length)
-  return ieee754.read(this, offset, false, 52, 8)
-}
-
-function checkInt (buf, value, offset, ext, max, min) {
-  if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')
-  if (value > max || value < min) throw new RangeError('value is out of bounds')
-  if (offset + ext > buf.length) throw new RangeError('index out of range')
-}
-
-Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)
-
-  var mul = 1
-  var i = 0
-  this[offset] = value & 0xFF
-  while (++i < byteLength && (mul *= 0x100)) {
-    this[offset + i] = (value / mul) & 0xFF
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)
-
-  var i = byteLength - 1
-  var mul = 1
-  this[offset + i] = value & 0xFF
-  while (--i >= 0 && (mul *= 0x100)) {
-    this[offset + i] = (value / mul) & 0xFF
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
-  this[offset] = (value & 0xff)
-  return offset + 1
-}
-
-function objectWriteUInt16 (buf, value, offset, littleEndian) {
-  if (value < 0) value = 0xffff + value + 1
-  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {
-    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
-      (littleEndian ? i : 1 - i) * 8
-  }
-}
-
-Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value & 0xff)
-    this[offset + 1] = (value >>> 8)
-  } else {
-    objectWriteUInt16(this, value, offset, true)
-  }
-  return offset + 2
-}
-
-Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 8)
-    this[offset + 1] = (value & 0xff)
-  } else {
-    objectWriteUInt16(this, value, offset, false)
-  }
-  return offset + 2
-}
-
-function objectWriteUInt32 (buf, value, offset, littleEndian) {
-  if (value < 0) value = 0xffffffff + value + 1
-  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {
-    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
-  }
-}
-
-Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset + 3] = (value >>> 24)
-    this[offset + 2] = (value >>> 16)
-    this[offset + 1] = (value >>> 8)
-    this[offset] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, true)
-  }
-  return offset + 4
-}
-
-Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 24)
-    this[offset + 1] = (value >>> 16)
-    this[offset + 2] = (value >>> 8)
-    this[offset + 3] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, false)
-  }
-  return offset + 4
-}
-
-Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) {
-    var limit = Math.pow(2, 8 * byteLength - 1)
-
-    checkInt(this, value, offset, byteLength, limit - 1, -limit)
-  }
-
-  var i = 0
-  var mul = 1
-  var sub = value < 0 ? 1 : 0
-  this[offset] = value & 0xFF
-  while (++i < byteLength && (mul *= 0x100)) {
-    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) {
-    var limit = Math.pow(2, 8 * byteLength - 1)
-
-    checkInt(this, value, offset, byteLength, limit - 1, -limit)
-  }
-
-  var i = byteLength - 1
-  var mul = 1
-  var sub = value < 0 ? 1 : 0
-  this[offset + i] = value & 0xFF
-  while (--i >= 0 && (mul *= 0x100)) {
-    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
-  if (value < 0) value = 0xff + value + 1
-  this[offset] = (value & 0xff)
-  return offset + 1
-}
-
-Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value & 0xff)
-    this[offset + 1] = (value >>> 8)
-  } else {
-    objectWriteUInt16(this, value, offset, true)
-  }
-  return offset + 2
-}
-
-Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 8)
-    this[offset + 1] = (value & 0xff)
-  } else {
-    objectWriteUInt16(this, value, offset, false)
-  }
-  return offset + 2
-}
-
-Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value & 0xff)
-    this[offset + 1] = (value >>> 8)
-    this[offset + 2] = (value >>> 16)
-    this[offset + 3] = (value >>> 24)
-  } else {
-    objectWriteUInt32(this, value, offset, true)
-  }
-  return offset + 4
-}
-
-Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
-  if (value < 0) value = 0xffffffff + value + 1
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 24)
-    this[offset + 1] = (value >>> 16)
-    this[offset + 2] = (value >>> 8)
-    this[offset + 3] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, false)
-  }
-  return offset + 4
-}
-
-function checkIEEE754 (buf, value, offset, ext, max, min) {
-  if (value > max || value < min) throw new RangeError('value is out of bounds')
-  if (offset + ext > buf.length) throw new RangeError('index out of range')
-  if (offset < 0) throw new RangeError('index out of range')
-}
-
-function writeFloat (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 23, 4)
-  return offset + 4
-}
-
-Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, true, noAssert)
-}
-
-Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, false, noAssert)
-}
-
-function writeDouble (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 52, 8)
-  return offset + 8
-}
-
-Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, true, noAssert)
-}
-
-Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, false, noAssert)
-}
-
-// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
-Buffer.prototype.copy = function copy (target, targetStart, start, end) {
-  if (!start) start = 0
-  if (!end && end !== 0) end = this.length
-  if (targetStart >= target.length) targetStart = target.length
-  if (!targetStart) targetStart = 0
-  if (end > 0 && end < start) end = start
-
-  // Copy 0 bytes; we're done
-  if (end === start) return 0
-  if (target.length === 0 || this.length === 0) return 0
-
-  // Fatal error conditions
-  if (targetStart < 0) {
-    throw new RangeError('targetStart out of bounds')
-  }
-  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
-  if (end < 0) throw new RangeError('sourceEnd out of bounds')
-
-  // Are we oob?
-  if (end > this.length) end = this.length
-  if (target.length - targetStart < end - start) {
-    end = target.length - targetStart + start
-  }
-
-  var len = end - start
-  var i
-
-  if (this === target && start < targetStart && targetStart < end) {
-    // descending copy from end
-    for (i = len - 1; i >= 0; i--) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
-    // ascending copy from start
-    for (i = 0; i < len; i++) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else {
-    target._set(this.subarray(start, start + len), targetStart)
-  }
-
-  return len
-}
-
-// fill(value, start=0, end=buffer.length)
-Buffer.prototype.fill = function fill (value, start, end) {
-  if (!value) value = 0
-  if (!start) start = 0
-  if (!end) end = this.length
-
-  if (end < start) throw new RangeError('end < start')
-
-  // Fill 0 bytes; we're done
-  if (end === start) return
-  if (this.length === 0) return
-
-  if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')
-  if (end < 0 || end > this.length) throw new RangeError('end out of bounds')
-
-  var i
-  if (typeof value === 'number') {
-    for (i = start; i < end; i++) {
-      this[i] = value
-    }
-  } else {
-    var bytes = utf8ToBytes(value.toString())
-    var len = bytes.length
-    for (i = start; i < end; i++) {
-      this[i] = bytes[i % len]
-    }
-  }
-
-  return this
-}
-
-/**
- * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.
- * Added in Node 0.12. Only available in browsers that support ArrayBuffer.
- */
-Buffer.prototype.toArrayBuffer = function toArrayBuffer () {
-  if (typeof Uint8Array !== 'undefined') {
-    if (Buffer.TYPED_ARRAY_SUPPORT) {
-      return (new Buffer(this)).buffer
-    } else {
-      var buf = new Uint8Array(this.length)
-      for (var i = 0, len = buf.length; i < len; i += 1) {
-        buf[i] = this[i]
-      }
-      return buf.buffer
-    }
-  } else {
-    throw new TypeError('Buffer.toArrayBuffer not supported in this browser')
-  }
-}
-
-// HELPER FUNCTIONS
-// ================
-
-var BP = Buffer.prototype
-
-/**
- * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods
- */
-Buffer._augment = function _augment (arr) {
-  arr.constructor = Buffer
-  arr._isBuffer = true
-
-  // save reference to original Uint8Array set method before overwriting
-  arr._set = arr.set
-
-  // deprecated
-  arr.get = BP.get
-  arr.set = BP.set
-
-  arr.write = BP.write
-  arr.toString = BP.toString
-  arr.toLocaleString = BP.toString
-  arr.toJSON = BP.toJSON
-  arr.equals = BP.equals
-  arr.compare = BP.compare
-  arr.indexOf = BP.indexOf
-  arr.copy = BP.copy
-  arr.slice = BP.slice
-  arr.readUIntLE = BP.readUIntLE
-  arr.readUIntBE = BP.readUIntBE
-  arr.readUInt8 = BP.readUInt8
-  arr.readUInt16LE = BP.readUInt16LE
-  arr.readUInt16BE = BP.readUInt16BE
-  arr.readUInt32LE = BP.readUInt32LE
-  arr.readUInt32BE = BP.readUInt32BE
-  arr.readIntLE = BP.readIntLE
-  arr.readIntBE = BP.readIntBE
-  arr.readInt8 = BP.readInt8
-  arr.readInt16LE = BP.readInt16LE
-  arr.readInt16BE = BP.readInt16BE
-  arr.readInt32LE = BP.readInt32LE
-  arr.readInt32BE = BP.readInt32BE
-  arr.readFloatLE = BP.readFloatLE
-  arr.readFloatBE = BP.readFloatBE
-  arr.readDoubleLE = BP.readDoubleLE
-  arr.readDoubleBE = BP.readDoubleBE
-  arr.writeUInt8 = BP.writeUInt8
-  arr.writeUIntLE = BP.writeUIntLE
-  arr.writeUIntBE = BP.writeUIntBE
-  arr.writeUInt16LE = BP.writeUInt16LE
-  arr.writeUInt16BE = BP.writeUInt16BE
-  arr.writeUInt32LE = BP.writeUInt32LE
-  arr.writeUInt32BE = BP.writeUInt32BE
-  arr.writeIntLE = BP.writeIntLE
-  arr.writeIntBE = BP.writeIntBE
-  arr.writeInt8 = BP.writeInt8
-  arr.writeInt16LE = BP.writeInt16LE
-  arr.writeInt16BE = BP.writeInt16BE
-  arr.writeInt32LE = BP.writeInt32LE
-  arr.writeInt32BE = BP.writeInt32BE
-  arr.writeFloatLE = BP.writeFloatLE
-  arr.writeFloatBE = BP.writeFloatBE
-  arr.writeDoubleLE = BP.writeDoubleLE
-  arr.writeDoubleBE = BP.writeDoubleBE
-  arr.fill = BP.fill
-  arr.inspect = BP.inspect
-  arr.toArrayBuffer = BP.toArrayBuffer
-
-  return arr
-}
-
-var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
-
-function base64clean (str) {
-  // Node strips out invalid characters like \n and \t from the string, base64-js does not
-  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
-  // Node converts strings with length < 2 to ''
-  if (str.length < 2) return ''
-  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
-  while (str.length % 4 !== 0) {
-    str = str + '='
-  }
-  return str
-}
-
-function stringtrim (str) {
-  if (str.trim) return str.trim()
-  return str.replace(/^\s+|\s+$/g, '')
-}
-
-function toHex (n) {
-  if (n < 16) return '0' + n.toString(16)
-  return n.toString(16)
-}
-
-function utf8ToBytes (string, units) {
-  units = units || Infinity
-  var codePoint
-  var length = string.length
-  var leadSurrogate = null
-  var bytes = []
-
-  for (var i = 0; i < length; i++) {
-    codePoint = string.charCodeAt(i)
-
-    // is surrogate component
-    if (codePoint > 0xD7FF && codePoint < 0xE000) {
-      // last char was a lead
-      if (!leadSurrogate) {
-        // no lead yet
-        if (codePoint > 0xDBFF) {
-          // unexpected trail
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        } else if (i + 1 === length) {
-          // unpaired lead
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        }
-
-        // valid lead
-        leadSurrogate = codePoint
-
-        continue
-      }
-
-      // 2 leads in a row
-      if (codePoint < 0xDC00) {
-        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-        leadSurrogate = codePoint
-        continue
-      }
-
-      // valid surrogate pair
-      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
-    } else if (leadSurrogate) {
-      // valid bmp char, but last char was a lead
-      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-    }
-
-    leadSurrogate = null
-
-    // encode utf8
-    if (codePoint < 0x80) {
-      if ((units -= 1) < 0) break
-      bytes.push(codePoint)
-    } else if (codePoint < 0x800) {
-      if ((units -= 2) < 0) break
-      bytes.push(
-        codePoint >> 0x6 | 0xC0,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x10000) {
-      if ((units -= 3) < 0) break
-      bytes.push(
-        codePoint >> 0xC | 0xE0,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x110000) {
-      if ((units -= 4) < 0) break
-      bytes.push(
-        codePoint >> 0x12 | 0xF0,
-        codePoint >> 0xC & 0x3F | 0x80,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else {
-      throw new Error('Invalid code point')
-    }
-  }
-
-  return bytes
-}
-
-function asciiToBytes (str) {
-  var byteArray = []
-  for (var i = 0; i < str.length; i++) {
-    // Node's code seems to be doing this and not & 0x7F..
-    byteArray.push(str.charCodeAt(i) & 0xFF)
-  }
-  return byteArray
-}
-
-function utf16leToBytes (str, units) {
-  var c, hi, lo
-  var byteArray = []
-  for (var i = 0; i < str.length; i++) {
-    if ((units -= 2) < 0) break
-
-    c = str.charCodeAt(i)
-    hi = c >> 8
-    lo = c % 256
-    byteArray.push(lo)
-    byteArray.push(hi)
-  }
-
-  return byteArray
-}
-
-function base64ToBytes (str) {
-  return base64.toByteArray(base64clean(str))
-}
-
-function blitBuffer (src, dst, offset, length) {
-  for (var i = 0; i < length; i++) {
-    if ((i + offset >= dst.length) || (i >= src.length)) break
-    dst[i + offset] = src[i]
-  }
-  return i
-}
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"base64-js":6,"ieee754":9,"isarray":8}],8:[function(require,module,exports){
-var toString = {}.toString;
-
-module.exports = Array.isArray || function (arr) {
-  return toString.call(arr) == '[object Array]';
-};
-
-},{}],9:[function(require,module,exports){
-exports.read = function (buffer, offset, isLE, mLen, nBytes) {
-  var e, m
-  var eLen = (nBytes * 8) - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var nBits = -7
-  var i = isLE ? (nBytes - 1) : 0
-  var d = isLE ? -1 : 1
-  var s = buffer[offset + i]
-
-  i += d
-
-  e = s & ((1 << (-nBits)) - 1)
-  s >>= (-nBits)
-  nBits += eLen
-  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
-
-  m = e & ((1 << (-nBits)) - 1)
-  e >>= (-nBits)
-  nBits += mLen
-  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
-
-  if (e === 0) {
-    e = 1 - eBias
-  } else if (e === eMax) {
-    return m ? NaN : ((s ? -1 : 1) * Infinity)
-  } else {
-    m = m + Math.pow(2, mLen)
-    e = e - eBias
-  }
-  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-}
-
-exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
-  var e, m, c
-  var eLen = (nBytes * 8) - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
-  var i = isLE ? 0 : (nBytes - 1)
-  var d = isLE ? 1 : -1
-  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
-
-  value = Math.abs(value)
-
-  if (isNaN(value) || value === Infinity) {
-    m = isNaN(value) ? 1 : 0
-    e = eMax
-  } else {
-    e = Math.floor(Math.log(value) / Math.LN2)
-    if (value * (c = Math.pow(2, -e)) < 1) {
-      e--
-      c *= 2
-    }
-    if (e + eBias >= 1) {
-      value += rt / c
-    } else {
-      value += rt * Math.pow(2, 1 - eBias)
-    }
-    if (value * c >= 2) {
-      e++
-      c /= 2
-    }
-
-    if (e + eBias >= eMax) {
-      m = 0
-      e = eMax
-    } else if (e + eBias >= 1) {
-      m = ((value * c) - 1) * Math.pow(2, mLen)
-      e = e + eBias
-    } else {
-      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
-      e = 0
-    }
-  }
-
-  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
-
-  e = (e << mLen) | m
-  eLen += mLen
-  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
-
-  buffer[offset + i - d] |= s * 128
-}
-
-},{}],10:[function(require,module,exports){
-;(function () { // closure for web browsers
-
-if (typeof module === 'object' && module.exports) {
-  module.exports = LRUCache
-} else {
-  // just set the global for non-node platforms.
-  this.LRUCache = LRUCache
-}
-
-function hOP (obj, key) {
-  return Object.prototype.hasOwnProperty.call(obj, key)
-}
-
-function naiveLength () { return 1 }
-
-function LRUCache (options) {
-  if (!(this instanceof LRUCache))
-    return new LRUCache(options)
-
-  if (typeof options === 'number')
-    options = { max: options }
-
-  if (!options)
-    options = {}
-
-  this._max = options.max
-  // Kind of weird to have a default max of Infinity, but oh well.
-  if (!this._max || !(typeof this._max === "number") || this._max <= 0 )
-    this._max = Infinity
-
-  this._lengthCalculator = options.length || naiveLength
-  if (typeof this._lengthCalculator !== "function")
-    this._lengthCalculator = naiveLength
-
-  this._allowStale = options.stale || false
-  this._maxAge = options.maxAge || null
-  this._dispose = options.dispose
-  this.reset()
-}
-
-// resize the cache when the max changes.
-Object.defineProperty(LRUCache.prototype, "max",
-  { set : function (mL) {
-      if (!mL || !(typeof mL === "number") || mL <= 0 ) mL = Infinity
-      this._max = mL
-      if (this._length > this._max) trim(this)
-    }
-  , get : function () { return this._max }
-  , enumerable : true
-  })
-
-// resize the cache when the lengthCalculator changes.
-Object.defineProperty(LRUCache.prototype, "lengthCalculator",
-  { set : function (lC) {
-      if (typeof lC !== "function") {
-        this._lengthCalculator = naiveLength
-        this._length = this._itemCount
-        for (var key in this._cache) {
-          this._cache[key].length = 1
-        }
-      } else {
-        this._lengthCalculator = lC
-        this._length = 0
-        for (var key in this._cache) {
-          this._cache[key].length = this._lengthCalculator(this._cache[key].value)
-          this._length += this._cache[key].length
-        }
-      }
-
-      if (this._length > this._max) trim(this)
-    }
-  , get : function () { return this._lengthCalculator }
-  , enumerable : true
-  })
-
-Object.defineProperty(LRUCache.prototype, "length",
-  { get : function () { return this._length }
-  , enumerable : true
-  })
-
-
-Object.defineProperty(LRUCache.prototype, "itemCount",
-  { get : function () { return this._itemCount }
-  , enumerable : true
-  })
-
-LRUCache.prototype.forEach = function (fn, thisp) {
-  thisp = thisp || this
-  var i = 0;
-  for (var k = this._mru - 1; k >= 0 && i < this._itemCount; k--) if (this._lruList[k]) {
-    i++
-    var hit = this._lruList[k]
-    if (this._maxAge && (Date.now() - hit.now > this._maxAge)) {
-      del(this, hit)
-      if (!this._allowStale) hit = undefined
-    }
-    if (hit) {
-      fn.call(thisp, hit.value, hit.key, this)
-    }
-  }
-}
-
-LRUCache.prototype.keys = function () {
-  var keys = new Array(this._itemCount)
-  var i = 0
-  for (var k = this._mru - 1; k >= 0 && i < this._itemCount; k--) if (this._lruList[k]) {
-    var hit = this._lruList[k]
-    keys[i++] = hit.key
-  }
-  return keys
-}
-
-LRUCache.prototype.values = function () {
-  var values = new Array(this._itemCount)
-  var i = 0
-  for (var k = this._mru - 1; k >= 0 && i < this._itemCount; k--) if (this._lruList[k]) {
-    var hit = this._lruList[k]
-    values[i++] = hit.value
-  }
-  return values
-}
-
-LRUCache.prototype.reset = function () {
-  if (this._dispose && this._cache) {
-    for (var k in this._cache) {
-      this._dispose(k, this._cache[k].value)
-    }
-  }
-
-  this._cache = Object.create(null) // hash of items by key
-  this._lruList = Object.create(null) // list of items in order of use recency
-  this._mru = 0 // most recently used
-  this._lru = 0 // least recently used
-  this._length = 0 // number of items in the list
-  this._itemCount = 0
-}
-
-// Provided for debugging/dev purposes only. No promises whatsoever that
-// this API stays stable.
-LRUCache.prototype.dump = function () {
-  return this._cache
-}
-
-LRUCache.prototype.dumpLru = function () {
-  return this._lruList
-}
-
-LRUCache.prototype.set = function (key, value) {
-  if (hOP(this._cache, key)) {
-    // dispose of the old one before overwriting
-    if (this._dispose) this._dispose(key, this._cache[key].value)
-    if (this._maxAge) this._cache[key].now = Date.now()
-    this._cache[key].value = value
-    this.get(key)
-    return true
-  }
-
-  var len = this._lengthCalculator(value)
-  var age = this._maxAge ? Date.now() : 0
-  var hit = new Entry(key, value, this._mru++, len, age)
-
-  // oversized objects fall out of cache automatically.
-  if (hit.length > this._max) {
-    if (this._dispose) this._dispose(key, value)
-    return false
-  }
-
-  this._length += hit.length
-  this._lruList[hit.lu] = this._cache[key] = hit
-  this._itemCount ++
-
-  if (this._length > this._max) trim(this)
-  return true
-}
-
-LRUCache.prototype.has = function (key) {
-  if (!hOP(this._cache, key)) return false
-  var hit = this._cache[key]
-  if (this._maxAge && (Date.now() - hit.now > this._maxAge)) {
-    return false
-  }
-  return true
-}
-
-LRUCache.prototype.get = function (key) {
-  return get(this, key, true)
-}
-
-LRUCache.prototype.peek = function (key) {
-  return get(this, key, false)
-}
-
-LRUCache.prototype.pop = function () {
-  var hit = this._lruList[this._lru]
-  del(this, hit)
-  return hit || null
-}
-
-LRUCache.prototype.del = function (key) {
-  del(this, this._cache[key])
-}
-
-function get (self, key, doUse) {
-  var hit = self._cache[key]
-  if (hit) {
-    if (self._maxAge && (Date.now() - hit.now > self._maxAge)) {
-      del(self, hit)
-      if (!self._allowStale) hit = undefined
-    } else {
-      if (doUse) use(self, hit)
-    }
-    if (hit) hit = hit.value
-  }
-  return hit
-}
-
-function use (self, hit) {
-  shiftLU(self, hit)
-  hit.lu = self._mru ++
-  if (self._maxAge) hit.now = Date.now()
-  self._lruList[hit.lu] = hit
-}
-
-function trim (self) {
-  while (self._lru < self._mru && self._length > self._max)
-    del(self, self._lruList[self._lru])
-}
-
-function shiftLU (self, hit) {
-  delete self._lruList[ hit.lu ]
-  while (self._lru < self._mru && !self._lruList[self._lru]) self._lru ++
-}
-
-function del (self, hit) {
-  if (hit) {
-    if (self._dispose) self._dispose(hit.key, hit.value)
-    self._length -= hit.length
-    self._itemCount --
-    delete self._cache[ hit.key ]
-    shiftLU(self, hit)
-  }
-}
-
-// classy, since V8 prefers predictable objects.
-function Entry (key, value, lu, length, now) {
-  this.key = key
-  this.value = value
-  this.lu = lu
-  this.length = length
-  this.now = now
-}
-
-})()
-
-},{}],11:[function(require,module,exports){
-;(function (require, exports, module, platform) {
-
-if (module) module.exports = minimatch
-else exports.minimatch = minimatch
-
-if (!require) {
-  require = function (id) {
-    switch (id) {
-      case "sigmund": return function sigmund (obj) {
-        return JSON.stringify(obj)
-      }
-      case "path": return { basename: function (f) {
-        f = f.split(/[\/\\]/)
-        var e = f.pop()
-        if (!e) e = f.pop()
-        return e
-      }}
-      case "lru-cache": return function LRUCache () {
-        // not quite an LRU, but still space-limited.
-        var cache = {}
-        var cnt = 0
-        this.set = function (k, v) {
-          cnt ++
-          if (cnt >= 100) cache = {}
-          cache[k] = v
-        }
-        this.get = function (k) { return cache[k] }
-      }
-    }
-  }
-}
-
-minimatch.Minimatch = Minimatch
-
-var LRU = require("lru-cache")
-  , cache = minimatch.cache = new LRU({max: 100})
-  , GLOBSTAR = minimatch.GLOBSTAR = Minimatch.GLOBSTAR = {}
-  , sigmund = require("sigmund")
-
-var path = require("path")
-  // any single thing other than /
-  // don't need to escape / when using new RegExp()
-  , qmark = "[^/]"
-
-  // * => any number of characters
-  , star = qmark + "*?"
-
-  // ** when dots are allowed.  Anything goes, except .. and .
-  // not (^ or / followed by one or two dots followed by $ or /),
-  // followed by anything, any number of times.
-  , twoStarDot = "(?:(?!(?:\\\/|^)(?:\\.{1,2})($|\\\/)).)*?"
-
-  // not a ^ or / followed by a dot,
-  // followed by anything, any number of times.
-  , twoStarNoDot = "(?:(?!(?:\\\/|^)\\.).)*?"
-
-  // characters that need to be escaped in RegExp.
-  , reSpecials = charSet("().*{}+?[]^$\\!")
-
-// "abc" -> { a:true, b:true, c:true }
-function charSet (s) {
-  return s.split("").reduce(function (set, c) {
-    set[c] = true
-    return set
-  }, {})
-}
-
-// normalizes slashes.
-var slashSplit = /\/+/
-
-minimatch.filter = filter
-function filter (pattern, options) {
-  options = options || {}
-  return function (p, i, list) {
-    return minimatch(p, pattern, options)
-  }
-}
-
-function ext (a, b) {
-  a = a || {}
-  b = b || {}
-  var t = {}
-  Object.keys(b).forEach(function (k) {
-    t[k] = b[k]
-  })
-  Object.keys(a).forEach(function (k) {
-    t[k] = a[k]
-  })
-  return t
-}
-
-minimatch.defaults = function (def) {
-  if (!def || !Object.keys(def).length) return minimatch
-
-  var orig = minimatch
-
-  var m = function minimatch (p, pattern, options) {
-    return orig.minimatch(p, pattern, ext(def, options))
-  }
-
-  m.Minimatch = function Minimatch (pattern, options) {
-    return new orig.Minimatch(pattern, ext(def, options))
-  }
-
-  return m
-}
-
-Minimatch.defaults = function (def) {
-  if (!def || !Object.keys(def).length) return Minimatch
-  return minimatch.defaults(def).Minimatch
-}
-
-
-function minimatch (p, pattern, options) {
-  if (typeof pattern !== "string") {
-    throw new TypeError("glob pattern string required")
-  }
-
-  if (!options) options = {}
-
-  // shortcut: comments match nothing.
-  if (!options.nocomment && pattern.charAt(0) === "#") {
-    return false
-  }
-
-  // "" only matches ""
-  if (pattern.trim() === "") return p === ""
-
-  return new Minimatch(pattern, options).match(p)
-}
-
-function Minimatch (pattern, options) {
-  if (!(this instanceof Minimatch)) {
-    return new Minimatch(pattern, options, cache)
-  }
-
-  if (typeof pattern !== "string") {
-    throw new TypeError("glob pattern string required")
-  }
-
-  if (!options) options = {}
-  pattern = pattern.trim()
-
-  // windows: need to use /, not \
-  // On other platforms, \ is a valid (albeit bad) filename char.
-  if (platform === "win32") {
-    pattern = pattern.split("\\").join("/")
-  }
-
-  // lru storage.
-  // these things aren't particularly big, but walking down the string
-  // and turning it into a regexp can get pretty costly.
-  var cacheKey = pattern + "\n" + sigmund(options)
-  var cached = minimatch.cache.get(cacheKey)
-  if (cached) return cached
-  minimatch.cache.set(cacheKey, this)
-
-  this.options = options
-  this.set = []
-  this.pattern = pattern
-  this.regexp = null
-  this.negate = false
-  this.comment = false
-  this.empty = false
-
-  // make the set of regexps etc.
-  this.make()
-}
-
-Minimatch.prototype.debug = function() {}
-
-Minimatch.prototype.make = make
-function make () {
-  // don't do it more than once.
-  if (this._made) return
-
-  var pattern = this.pattern
-  var options = this.options
-
-  // empty patterns and comments match nothing.
-  if (!options.nocomment && pattern.charAt(0) === "#") {
-    this.comment = true
-    return
-  }
-  if (!pattern) {
-    this.empty = true
-    return
-  }
-
-  // step 1: figure out negation, etc.
-  this.parseNegate()
-
-  // step 2: expand braces
-  var set = this.globSet = this.braceExpand()
-
-  if (options.debug) this.debug = console.error
-
-  this.debug(this.pattern, set)
-
-  // step 3: now we have a set, so turn each one into a series of path-portion
-  // matching patterns.
-  // These will be regexps, except in the case of "**", which is
-  // set to the GLOBSTAR object for globstar behavior,
-  // and will not contain any / characters
-  set = this.globParts = set.map(function (s) {
-    return s.split(slashSplit)
-  })
-
-  this.debug(this.pattern, set)
-
-  // glob --> regexps
-  set = set.map(function (s, si, set) {
-    return s.map(this.parse, this)
-  }, this)
-
-  this.debug(this.pattern, set)
-
-  // filter out everything that didn't compile properly.
-  set = set.filter(function (s) {
-    return -1 === s.indexOf(false)
-  })
-
-  this.debug(this.pattern, set)
-
-  this.set = set
-}
-
-Minimatch.prototype.parseNegate = parseNegate
-function parseNegate () {
-  var pattern = this.pattern
-    , negate = false
-    , options = this.options
-    , negateOffset = 0
-
-  if (options.nonegate) return
-
-  for ( var i = 0, l = pattern.length
-      ; i < l && pattern.charAt(i) === "!"
-      ; i ++) {
-    negate = !negate
-    negateOffset ++
-  }
-
-  if (negateOffset) this.pattern = pattern.substr(negateOffset)
-  this.negate = negate
-}
-
-// Brace expansion:
-// a{b,c}d -> abd acd
-// a{b,}c -> abc ac
-// a{0..3}d -> a0d a1d a2d a3d
-// a{b,c{d,e}f}g -> abg acdfg acefg
-// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg
-//
-// Invalid sets are not expanded.
-// a{2..}b -> a{2..}b
-// a{b}c -> a{b}c
-minimatch.braceExpand = function (pattern, options) {
-  return new Minimatch(pattern, options).braceExpand()
-}
-
-Minimatch.prototype.braceExpand = braceExpand
-
-function pad(n, width, z) {
-  z = z || '0';
-  n = n + '';
-  return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
-}
-
-function braceExpand (pattern, options) {
-  options = options || this.options
-  pattern = typeof pattern === "undefined"
-    ? this.pattern : pattern
-
-  if (typeof pattern === "undefined") {
-    throw new Error("undefined pattern")
-  }
-
-  if (options.nobrace ||
-      !pattern.match(/\{.*\}/)) {
-    // shortcut. no need to expand.
-    return [pattern]
-  }
-
-  var escaping = false
-
-  // examples and comments refer to this crazy pattern:
-  // a{b,c{d,e},{f,g}h}x{y,z}
-  // expected:
-  // abxy
-  // abxz
-  // acdxy
-  // acdxz
-  // acexy
-  // acexz
-  // afhxy
-  // afhxz
-  // aghxy
-  // aghxz
-
-  // everything before the first \{ is just a prefix.
-  // So, we pluck that off, and work with the rest,
-  // and then prepend it to everything we find.
-  if (pattern.charAt(0) !== "{") {
-    this.debug(pattern)
-    var prefix = null
-    for (var i = 0, l = pattern.length; i < l; i ++) {
-      var c = pattern.charAt(i)
-      this.debug(i, c)
-      if (c === "\\") {
-        escaping = !escaping
-      } else if (c === "{" && !escaping) {
-        prefix = pattern.substr(0, i)
-        break
-      }
-    }
-
-    // actually no sets, all { were escaped.
-    if (prefix === null) {
-      this.debug("no sets")
-      return [pattern]
-    }
-
-   var tail = braceExpand.call(this, pattern.substr(i), options)
-    return tail.map(function (t) {
-      return prefix + t
-    })
-  }
-
-  // now we have something like:
-  // {b,c{d,e},{f,g}h}x{y,z}
-  // walk through the set, expanding each part, until
-  // the set ends.  then, we'll expand the suffix.
-  // If the set only has a single member, then'll put the {} back
-
-  // first, handle numeric sets, since they're easier
-  var numset = pattern.match(/^\{(-?[0-9]+)\.\.(-?[0-9]+)\}/)
-  if (numset) {
-    this.debug("numset", numset[1], numset[2])
-    var suf = braceExpand.call(this, pattern.substr(numset[0].length), options)
-      , start = +numset[1]
-      , needPadding = numset[1][0] === '0'
-      , startWidth = numset[1].length
-      , padded
-      , end = +numset[2]
-      , inc = start > end ? -1 : 1
-      , set = []
-
-    for (var i = start; i != (end + inc); i += inc) {
-      padded = needPadding ? pad(i, startWidth) : i + ''
-      // append all the suffixes
-      for (var ii = 0, ll = suf.length; ii < ll; ii ++) {
-        set.push(padded + suf[ii])
-      }
-    }
-    return set
-  }
-
-  // ok, walk through the set
-  // We hope, somewhat optimistically, that there
-  // will be a } at the end.
-  // If the closing brace isn't found, then the pattern is
-  // interpreted as braceExpand("\\" + pattern) so that
-  // the leading \{ will be interpreted literally.
-  var i = 1 // skip the \{
-    , depth = 1
-    , set = []
-    , member = ""
-    , sawEnd = false
-    , escaping = false
-
-  function addMember () {
-    set.push(member)
-    member = ""
-  }
-
-  this.debug("Entering for")
-  FOR: for (i = 1, l = pattern.length; i < l; i ++) {
-    var c = pattern.charAt(i)
-    this.debug("", i, c)
-
-    if (escaping) {
-      escaping = false
-      member += "\\" + c
-    } else {
-      switch (c) {
-        case "\\":
-          escaping = true
-          continue
-
-        case "{":
-          depth ++
-          member += "{"
-          continue
-
-        case "}":
-          depth --
-          // if this closes the actual set, then we're done
-          if (depth === 0) {
-            addMember()
-            // pluck off the close-brace
-            i ++
-            break FOR
-          } else {
-            member += c
-            continue
-          }
-
-        case ",":
-          if (depth === 1) {
-            addMember()
-          } else {
-            member += c
-          }
-          continue
-
-        default:
-          member += c
-          continue
-      } // switch
-    } // else
-  } // for
-
-  // now we've either finished the set, and the suffix is
-  // pattern.substr(i), or we have *not* closed the set,
-  // and need to escape the leading brace
-  if (depth !== 0) {
-    this.debug("didn't close", pattern)
-    return braceExpand.call(this, "\\" + pattern, options)
-  }
-
-  // x{y,z} -> ["xy", "xz"]
-  this.debug("set", set)
-  this.debug("suffix", pattern.substr(i))
-  var suf = braceExpand.call(this, pattern.substr(i), options)
-  // ["b", "c{d,e}","{f,g}h"] ->
-  //   [["b"], ["cd", "ce"], ["fh", "gh"]]
-  var addBraces = set.length === 1
-  this.debug("set pre-expanded", set)
-  set = set.map(function (p) {
-    return braceExpand.call(this, p, options)
-  }, this)
-  this.debug("set expanded", set)
-
-
-  // [["b"], ["cd", "ce"], ["fh", "gh"]] ->
-  //   ["b", "cd", "ce", "fh", "gh"]
-  set = set.reduce(function (l, r) {
-    return l.concat(r)
-  })
-
-  if (addBraces) {
-    set = set.map(function (s) {
-      return "{" + s + "}"
-    })
-  }
-
-  // now attach the suffixes.
-  var ret = []
-  for (var i = 0, l = set.length; i < l; i ++) {
-    for (var ii = 0, ll = suf.length; ii < ll; ii ++) {
-      ret.push(set[i] + suf[ii])
-    }
-  }
-  return ret
-}
-
-// parse a component of the expanded set.
-// At this point, no pattern may contain "/" in it
-// so we're going to return a 2d array, where each entry is the full
-// pattern, split on '/', and then turned into a regular expression.
-// A regexp is made at the end which joins each array with an
-// escaped /, and another full one which joins each regexp with |.
-//
-// Following the lead of Bash 4.1, note that "**" only has special meaning
-// when it is the *only* thing in a path portion.  Otherwise, any series
-// of * is equivalent to a single *.  Globstar behavior is enabled by
-// default, and can be disabled by setting options.noglobstar.
-Minimatch.prototype.parse = parse
-var SUBPARSE = {}
-function parse (pattern, isSub) {
-  var options = this.options
-
-  // shortcuts
-  if (!options.noglobstar && pattern === "**") return GLOBSTAR
-  if (pattern === "") return ""
-
-  var re = ""
-    , hasMagic = !!options.nocase
-    , escaping = false
-    // ? => one single character
-    , patternListStack = []
-    , plType
-    , stateChar
-    , inClass = false
-    , reClassStart = -1
-    , classStart = -1
-    // . and .. never match anything that doesn't start with .,
-    // even when options.dot is set.
-    , patternStart = pattern.charAt(0) === "." ? "" // anything
-      // not (start or / followed by . or .. followed by / or end)
-      : options.dot ? "(?!(?:^|\\\/)\\.{1,2}(?:$|\\\/))"
-      : "(?!\\.)"
-    , self = this
-
-  function clearStateChar () {
-    if (stateChar) {
-      // we had some state-tracking character
-      // that wasn't consumed by this pass.
-      switch (stateChar) {
-        case "*":
-          re += star
-          hasMagic = true
-          break
-        case "?":
-          re += qmark
-          hasMagic = true
-          break
-        default:
-          re += "\\"+stateChar
-          break
-      }
-      self.debug('clearStateChar %j %j', stateChar, re)
-      stateChar = false
-    }
-  }
-
-  for ( var i = 0, len = pattern.length, c
-      ; (i < len) && (c = pattern.charAt(i))
-      ; i ++ ) {
-
-    this.debug("%s\t%s %s %j", pattern, i, re, c)
-
-    // skip over any that are escaped.
-    if (escaping && reSpecials[c]) {
-      re += "\\" + c
-      escaping = false
-      continue
-    }
-
-    SWITCH: switch (c) {
-      case "/":
-        // completely not allowed, even escaped.
-        // Should already be path-split by now.
-        return false
-
-      case "\\":
-        clearStateChar()
-        escaping = true
-        continue
-
-      // the various stateChar values
-      // for the "extglob" stuff.
-      case "?":
-      case "*":
-      case "+":
-      case "@":
-      case "!":
-        this.debug("%s\t%s %s %j <-- stateChar", pattern, i, re, c)
-
-        // all of those are literals inside a class, except that
-        // the glob [!a] means [^a] in regexp
-        if (inClass) {
-          this.debug('  in class')
-          if (c === "!" && i === classStart + 1) c = "^"
-          re += c
-          continue
-        }
-
-        // if we already have a stateChar, then it means
-        // that there was something like ** or +? in there.
-        // Handle the stateChar, then proceed with this one.
-        self.debug('call clearStateChar %j', stateChar)
-        clearStateChar()
-        stateChar = c
-        // if extglob is disabled, then +(asdf|foo) isn't a thing.
-        // just clear the statechar *now*, rather than even diving into
-        // the patternList stuff.
-        if (options.noext) clearStateChar()
-        continue
-
-      case "(":
-        if (inClass) {
-          re += "("
-          continue
-        }
-
-        if (!stateChar) {
-          re += "\\("
-          continue
-        }
-
-        plType = stateChar
-        patternListStack.push({ type: plType
-                              , start: i - 1
-                              , reStart: re.length })
-        // negation is (?:(?!js)[^/]*)
-        re += stateChar === "!" ? "(?:(?!" : "(?:"
-        this.debug('plType %j %j', stateChar, re)
-        stateChar = false
-        continue
-
-      case ")":
-        if (inClass || !patternListStack.length) {
-          re += "\\)"
-          continue
-        }
-
-        clearStateChar()
-        hasMagic = true
-        re += ")"
-        plType = patternListStack.pop().type
-        // negation is (?:(?!js)[^/]*)
-        // The others are (?:<pattern>)<type>
-        switch (plType) {
-          case "!":
-            re += "[^/]*?)"
-            break
-          case "?":
-          case "+":
-          case "*": re += plType
-          case "@": break // the default anyway
-        }
-        continue
-
-      case "|":
-        if (inClass || !patternListStack.length || escaping) {
-          re += "\\|"
-          escaping = false
-          continue
-        }
-
-        clearStateChar()
-        re += "|"
-        continue
-
-      // these are mostly the same in regexp and glob
-      case "[":
-        // swallow any state-tracking char before the [
-        clearStateChar()
-
-        if (inClass) {
-          re += "\\" + c
-          continue
-        }
-
-        inClass = true
-        classStart = i
-        reClassStart = re.length
-        re += c
-        continue
-
-      case "]":
-        //  a right bracket shall lose its special
-        //  meaning and represent itself in
-        //  a bracket expression if it occurs
-        //  first in the list.  -- POSIX.2 2.8.3.2
-        if (i === classStart + 1 || !inClass) {
-          re += "\\" + c
-          escaping = false
-          continue
-        }
-
-        // finish up the class.
-        hasMagic = true
-        inClass = false
-        re += c
-        continue
-
-      default:
-        // swallow any state char that wasn't consumed
-        clearStateChar()
-
-        if (escaping) {
-          // no need
-          escaping = false
-        } else if (reSpecials[c]
-                   && !(c === "^" && inClass)) {
-          re += "\\"
-        }
-
-        re += c
-
-    } // switch
-  } // for
-
-
-  // handle the case where we left a class open.
-  // "[abc" is valid, equivalent to "\[abc"
-  if (inClass) {
-    // split where the last [ was, and escape it
-    // this is a huge pita.  We now have to re-walk
-    // the contents of the would-be class to re-translate
-    // any characters that were passed through as-is
-    var cs = pattern.substr(classStart + 1)
-      , sp = this.parse(cs, SUBPARSE)
-    re = re.substr(0, reClassStart) + "\\[" + sp[0]
-    hasMagic = hasMagic || sp[1]
-  }
-
-  // handle the case where we had a +( thing at the *end*
-  // of the pattern.
-  // each pattern list stack adds 3 chars, and we need to go through
-  // and escape any | chars that were passed through as-is for the regexp.
-  // Go through and escape them, taking care not to double-escape any
-  // | chars that were already escaped.
-  var pl
-  while (pl = patternListStack.pop()) {
-    var tail = re.slice(pl.reStart + 3)
-    // maybe some even number of \, then maybe 1 \, followed by a |
-    tail = tail.replace(/((?:\\{2})*)(\\?)\|/g, function (_, $1, $2) {
-      if (!$2) {
-        // the | isn't already escaped, so escape it.
-        $2 = "\\"
-      }
-
-      // need to escape all those slashes *again*, without escaping the
-      // one that we need for escaping the | character.  As it works out,
-      // escaping an even number of slashes can be done by simply repeating
-      // it exactly after itself.  That's why this trick works.
-      //
-      // I am sorry that you have to see this.
-      return $1 + $1 + $2 + "|"
-    })
-
-    this.debug("tail=%j\n   %s", tail, tail)
-    var t = pl.type === "*" ? star
-          : pl.type === "?" ? qmark
-          : "\\" + pl.type
-
-    hasMagic = true
-    re = re.slice(0, pl.reStart)
-       + t + "\\("
-       + tail
-  }
-
-  // handle trailing things that only matter at the very end.
-  clearStateChar()
-  if (escaping) {
-    // trailing \\
-    re += "\\\\"
-  }
-
-  // only need to apply the nodot start if the re starts with
-  // something that could conceivably capture a dot
-  var addPatternStart = false
-  switch (re.charAt(0)) {
-    case ".":
-    case "[":
-    case "(": addPatternStart = true
-  }
-
-  // if the re is not "" at this point, then we need to make sure
-  // it doesn't match against an empty path part.
-  // Otherwise a/* will match a/, which it should not.
-  if (re !== "" && hasMagic) re = "(?=.)" + re
-
-  if (addPatternStart) re = patternStart + re
-
-  // parsing just a piece of a larger pattern.
-  if (isSub === SUBPARSE) {
-    return [ re, hasMagic ]
-  }
-
-  // skip the regexp for non-magical patterns
-  // unescape anything in it, though, so that it'll be
-  // an exact match against a file etc.
-  if (!hasMagic) {
-    return globUnescape(pattern)
-  }
-
-  var flags = options.nocase ? "i" : ""
-    , regExp = new RegExp("^" + re + "$", flags)
-
-  regExp._glob = pattern
-  regExp._src = re
-
-  return regExp
-}
-
-minimatch.makeRe = function (pattern, options) {
-  return new Minimatch(pattern, options || {}).makeRe()
-}
-
-Minimatch.prototype.makeRe = makeRe
-function makeRe () {
-  if (this.regexp || this.regexp === false) return this.regexp
-
-  // at this point, this.set is a 2d array of partial
-  // pattern strings, or "**".
-  //
-  // It's better to use .match().  This function shouldn't
-  // be used, really, but it's pretty convenient sometimes,
-  // when you just want to work with a regex.
-  var set = this.set
-
-  if (!set.length) return this.regexp = false
-  var options = this.options
-
-  var twoStar = options.noglobstar ? star
-      : options.dot ? twoStarDot
-      : twoStarNoDot
-    , flags = options.nocase ? "i" : ""
-
-  var re = set.map(function (pattern) {
-    return pattern.map(function (p) {
-      return (p === GLOBSTAR) ? twoStar
-           : (typeof p === "string") ? regExpEscape(p)
-           : p._src
-    }).join("\\\/")
-  }).join("|")
-
-  // must match entire pattern
-  // ending in a * or ** will make it less strict.
-  re = "^(?:" + re + ")$"
-
-  // can match anything, as long as it's not this.
-  if (this.negate) re = "^(?!" + re + ").*$"
-
-  try {
-    return this.regexp = new RegExp(re, flags)
-  } catch (ex) {
-    return this.regexp = false
-  }
-}
-
-minimatch.match = function (list, pattern, options) {
-  options = options || {}
-  var mm = new Minimatch(pattern, options)
-  list = list.filter(function (f) {
-    return mm.match(f)
-  })
-  if (mm.options.nonull && !list.length) {
-    list.push(pattern)
-  }
-  return list
-}
-
-Minimatch.prototype.match = match
-function match (f, partial) {
-  this.debug("match", f, this.pattern)
-  // short-circuit in the case of busted things.
-  // comments, etc.
-  if (this.comment) return false
-  if (this.empty) return f === ""
-
-  if (f === "/" && partial) return true
-
-  var options = this.options
-
-  // windows: need to use /, not \
-  // On other platforms, \ is a valid (albeit bad) filename char.
-  if (platform === "win32") {
-    f = f.split("\\").join("/")
-  }
-
-  // treat the test path as a set of pathparts.
-  f = f.split(slashSplit)
-  this.debug(this.pattern, "split", f)
-
-  // just ONE of the pattern sets in this.set needs to match
-  // in order for it to be valid.  If negating, then just one
-  // match means that we have failed.
-  // Either way, return on the first hit.
-
-  var set = this.set
-  this.debug(this.pattern, "set", set)
-
-  // Find the basename of the path by looking for the last non-empty segment
-  var filename;
-  for (var i = f.length - 1; i >= 0; i--) {
-    filename = f[i]
-    if (filename) break
-  }
-
-  for (var i = 0, l = set.length; i < l; i ++) {
-    var pattern = set[i], file = f
-    if (options.matchBase && pattern.length === 1) {
-      file = [filename]
-    }
-    var hit = this.matchOne(file, pattern, partial)
-    if (hit) {
-      if (options.flipNegate) return true
-      return !this.negate
-    }
-  }
-
-  // didn't get any hits.  this is success if it's a negative
-  // pattern, failure otherwise.
-  if (options.flipNegate) return false
-  return this.negate
-}
-
-// set partial to true to test if, for example,
-// "/a/b" matches the start of "/*/b/*/d"
-// Partial means, if you run out of file before you run
-// out of pattern, then that's fine, as long as all
-// the parts match.
-Minimatch.prototype.matchOne = function (file, pattern, partial) {
-  var options = this.options
-
-  this.debug("matchOne",
-              { "this": this
-              , file: file
-              , pattern: pattern })
-
-  this.debug("matchOne", file.length, pattern.length)
-
-  for ( var fi = 0
-          , pi = 0
-          , fl = file.length
-          , pl = pattern.length
-      ; (fi < fl) && (pi < pl)
-      ; fi ++, pi ++ ) {
-
-    this.debug("matchOne loop")
-    var p = pattern[pi]
-      , f = file[fi]
-
-    this.debug(pattern, p, f)
-
-    // should be impossible.
-    // some invalid regexp stuff in the set.
-    if (p === false) return false
-
-    if (p === GLOBSTAR) {
-      this.debug('GLOBSTAR', [pattern, p, f])
-
-      // "**"
-      // a/**/b/**/c would match the following:
-      // a/b/x/y/z/c
-      // a/x/y/z/b/c
-      // a/b/x/b/x/c
-      // a/b/c
-      // To do this, take the rest of the pattern after
-      // the **, and see if it would match the file remainder.
-      // If so, return success.
-      // If not, the ** "swallows" a segment, and try again.
-      // This is recursively awful.
-      //
-      // a/**/b/**/c matching a/b/x/y/z/c
-      // - a matches a
-      // - doublestar
-      //   - matchOne(b/x/y/z/c, b/**/c)
-      //     - b matches b
-      //     - doublestar
-      //       - matchOne(x/y/z/c, c) -> no
-      //       - matchOne(y/z/c, c) -> no
-      //       - matchOne(z/c, c) -> no
-      //       - matchOne(c, c) yes, hit
-      var fr = fi
-        , pr = pi + 1
-      if (pr === pl) {
-        this.debug('** at the end')
-        // a ** at the end will just swallow the rest.
-        // We have found a match.
-        // however, it will not swallow /.x, unless
-        // options.dot is set.
-        // . and .. are *never* matched by **, for explosively
-        // exponential reasons.
-        for ( ; fi < fl; fi ++) {
-          if (file[fi] === "." || file[fi] === ".." ||
-              (!options.dot && file[fi].charAt(0) === ".")) return false
-        }
-        return true
-      }
-
-      // ok, let's see if we can swallow whatever we can.
-      WHILE: while (fr < fl) {
-        var swallowee = file[fr]
-
-        this.debug('\nglobstar while',
-                    file, fr, pattern, pr, swallowee)
-
-        // XXX remove this slice.  Just pass the start index.
-        if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {
-          this.debug('globstar found match!', fr, fl, swallowee)
-          // found a match.
-          return true
-        } else {
-          // can't swallow "." or ".." ever.
-          // can only swallow ".foo" when explicitly asked.
-          if (swallowee === "." || swallowee === ".." ||
-              (!options.dot && swallowee.charAt(0) === ".")) {
-            this.debug("dot detected!", file, fr, pattern, pr)
-            break WHILE
-          }
-
-          // ** swallows a segment, and continue.
-          this.debug('globstar swallow a segment, and continue')
-          fr ++
-        }
-      }
-      // no match was found.
-      // However, in partial mode, we can't say this is necessarily over.
-      // If there's more *pattern* left, then
-      if (partial) {
-        // ran out of file
-        this.debug("\n>>> no match, partial?", file, fr, pattern, pr)
-        if (fr === fl) return true
-      }
-      return false
-    }
-
-    // something other than **
-    // non-magic patterns just have to match exactly
-    // patterns with magic have been turned into regexps.
-    var hit
-    if (typeof p === "string") {
-      if (options.nocase) {
-        hit = f.toLowerCase() === p.toLowerCase()
-      } else {
-        hit = f === p
-      }
-      this.debug("string match", p, f, hit)
-    } else {
-      hit = f.match(p)
-      this.debug("pattern match", p, f, hit)
-    }
-
-    if (!hit) return false
-  }
-
-  // Note: ending in / means that we'll get a final ""
-  // at the end of the pattern.  This can only match a
-  // corresponding "" at the end of the file.
-  // If the file ends in /, then it can only match a
-  // a pattern that ends in /, unless the pattern just
-  // doesn't have any more for it. But, a/b/ should *not*
-  // match "a/b/*", even though "" matches against the
-  // [^/]*? pattern, except in partial mode, where it might
-  // simply not be reached yet.
-  // However, a/b/ should still satisfy a/*
-
-  // now either we fell off the end of the pattern, or we're done.
-  if (fi === fl && pi === pl) {
-    // ran out of pattern and filename at the same time.
-    // an exact hit!
-    return true
-  } else if (fi === fl) {
-    // ran out of file, but still had pattern left.
-    // this is ok if we're doing the match as part of
-    // a glob fs traversal.
-    return partial
-  } else if (pi === pl) {
-    // ran out of pattern, still have file left.
-    // this is only acceptable if we're on the very last
-    // empty segment of a file with a trailing slash.
-    // a/* should match a/b/
-    var emptyFileEnd = (fi === fl - 1) && (file[fi] === "")
-    return emptyFileEnd
-  }
-
-  // should be unreachable.
-  throw new Error("wtf?")
-}
-
-
-// replace stuff like \* with *
-function globUnescape (s) {
-  return s.replace(/\\(.)/g, "$1")
-}
-
-
-function regExpEscape (s) {
-  return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&")
-}
-
-})( typeof require === "function" ? require : null,
-    this,
-    typeof module === "object" ? module : null,
-    typeof process === "object" ? process.platform : "win32"
-  )
-
-},{"lru-cache":10,"path":12,"sigmund":17}],12:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-// resolves . and .. elements in a path array with directory names there
-// must be no slashes, empty elements, or device names (c:\) in the array
-// (so also no leading and trailing slashes - it does not distinguish
-// relative and absolute paths)
-function normalizeArray(parts, allowAboveRoot) {
-  // if the path tries to go above the root, `up` ends up > 0
-  var up = 0;
-  for (var i = parts.length - 1; i >= 0; i--) {
-    var last = parts[i];
-    if (last === '.') {
-      parts.splice(i, 1);
-    } else if (last === '..') {
-      parts.splice(i, 1);
-      up++;
-    } else if (up) {
-      parts.splice(i, 1);
-      up--;
-    }
-  }
-
-  // if the path is allowed to go above the root, restore leading ..s
-  if (allowAboveRoot) {
-    for (; up--; up) {
-      parts.unshift('..');
-    }
-  }
-
-  return parts;
-}
-
-// Split a filename into [root, dir, basename, ext], unix version
-// 'root' is just a slash, or nothing.
-var splitPathRe =
-    /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
-var splitPath = function(filename) {
-  return splitPathRe.exec(filename).slice(1);
-};
-
-// path.resolve([from ...], to)
-// posix version
-exports.resolve = function() {
-  var resolvedPath = '',
-      resolvedAbsolute = false;
-
-  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
-    var path = (i >= 0) ? arguments[i] : process.cwd();
-
-    // Skip empty and invalid entries
-    if (typeof path !== 'string') {
-      throw new TypeError('Arguments to path.resolve must be strings');
-    } else if (!path) {
-      continue;
-    }
-
-    resolvedPath = path + '/' + resolvedPath;
-    resolvedAbsolute = path.charAt(0) === '/';
-  }
-
-  // At this point the path should be resolved to a full absolute path, but
-  // handle relative paths to be safe (might happen when process.cwd() fails)
-
-  // Normalize the path
-  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
-    return !!p;
-  }), !resolvedAbsolute).join('/');
-
-  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
-};
-
-// path.normalize(path)
-// posix version
-exports.normalize = function(path) {
-  var isAbsolute = exports.isAbsolute(path),
-      trailingSlash = substr(path, -1) === '/';
-
-  // Normalize the path
-  path = normalizeArray(filter(path.split('/'), function(p) {
-    return !!p;
-  }), !isAbsolute).join('/');
-
-  if (!path && !isAbsolute) {
-    path = '.';
-  }
-  if (path && trailingSlash) {
-    path += '/';
-  }
-
-  return (isAbsolute ? '/' : '') + path;
-};
-
-// posix version
-exports.isAbsolute = function(path) {
-  return path.charAt(0) === '/';
-};
-
-// posix version
-exports.join = function() {
-  var paths = Array.prototype.slice.call(arguments, 0);
-  return exports.normalize(filter(paths, function(p, index) {
-    if (typeof p !== 'string') {
-      throw new TypeError('Arguments to path.join must be strings');
-    }
-    return p;
-  }).join('/'));
-};
-
-
-// path.relative(from, to)
-// posix version
-exports.relative = function(from, to) {
-  from = exports.resolve(from).substr(1);
-  to = exports.resolve(to).substr(1);
-
-  function trim(arr) {
-    var start = 0;
-    for (; start < arr.length; start++) {
-      if (arr[start] !== '') break;
-    }
-
-    var end = arr.length - 1;
-    for (; end >= 0; end--) {
-      if (arr[end] !== '') break;
-    }
-
-    if (start > end) return [];
-    return arr.slice(start, end - start + 1);
-  }
-
-  var fromParts = trim(from.split('/'));
-  var toParts = trim(to.split('/'));
-
-  var length = Math.min(fromParts.length, toParts.length);
-  var samePartsLength = length;
-  for (var i = 0; i < length; i++) {
-    if (fromParts[i] !== toParts[i]) {
-      samePartsLength = i;
-      break;
-    }
-  }
-
-  var outputParts = [];
-  for (var i = samePartsLength; i < fromParts.length; i++) {
-    outputParts.push('..');
-  }
-
-  outputParts = outputParts.concat(toParts.slice(samePartsLength));
-
-  return outputParts.join('/');
-};
-
-exports.sep = '/';
-exports.delimiter = ':';
-
-exports.dirname = function(path) {
-  var result = splitPath(path),
-      root = result[0],
-      dir = result[1];
-
-  if (!root && !dir) {
-    // No dirname whatsoever
-    return '.';
-  }
-
-  if (dir) {
-    // It has a dirname, strip trailing slash
-    dir = dir.substr(0, dir.length - 1);
-  }
-
-  return root + dir;
-};
-
-
-exports.basename = function(path, ext) {
-  var f = splitPath(path)[2];
-  // TODO: make this comparison case-insensitive on windows?
-  if (ext && f.substr(-1 * ext.length) === ext) {
-    f = f.substr(0, f.length - ext.length);
-  }
-  return f;
-};
-
-
-exports.extname = function(path) {
-  return splitPath(path)[3];
-};
-
-function filter (xs, f) {
-    if (xs.filter) return xs.filter(f);
-    var res = [];
-    for (var i = 0; i < xs.length; i++) {
-        if (f(xs[i], i, xs)) res.push(xs[i]);
-    }
-    return res;
-}
-
-// String.prototype.substr - negative index don't work in IE8
-var substr = 'ab'.substr(-1) === 'b'
-    ? function (str, start, len) { return str.substr(start, len) }
-    : function (str, start, len) {
-        if (start < 0) start = str.length + start;
-        return str.substr(start, len);
-    }
-;
-
-},{}],13:[function(require,module,exports){
-(function (global){
-/*! https://mths.be/punycode v1.4.1 by @mathias */
-;(function(root) {
-
-	/** Detect free variables */
-	var freeExports = typeof exports == 'object' && exports &&
-		!exports.nodeType && exports;
-	var freeModule = typeof module == 'object' && module &&
-		!module.nodeType && module;
-	var freeGlobal = typeof global == 'object' && global;
-	if (
-		freeGlobal.global === freeGlobal ||
-		freeGlobal.window === freeGlobal ||
-		freeGlobal.self === freeGlobal
-	) {
-		root = freeGlobal;
-	}
-
-	/**
-	 * The `punycode` object.
-	 * @name punycode
-	 * @type Object
-	 */
-	var punycode,
-
-	/** Highest positive signed 32-bit float value */
-	maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1
-
-	/** Bootstring parameters */
-	base = 36,
-	tMin = 1,
-	tMax = 26,
-	skew = 38,
-	damp = 700,
-	initialBias = 72,
-	initialN = 128, // 0x80
-	delimiter = '-', // '\x2D'
-
-	/** Regular expressions */
-	regexPunycode = /^xn--/,
-	regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
-	regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators
-
-	/** Error messages */
-	errors = {
-		'overflow': 'Overflow: input needs wider integers to process',
-		'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
-		'invalid-input': 'Invalid input'
-	},
-
-	/** Convenience shortcuts */
-	baseMinusTMin = base - tMin,
-	floor = Math.floor,
-	stringFromCharCode = String.fromCharCode,
-
-	/** Temporary variable */
-	key;
-
-	/*--------------------------------------------------------------------------*/
-
-	/**
-	 * A generic error utility function.
-	 * @private
-	 * @param {String} type The error type.
-	 * @returns {Error} Throws a `RangeError` with the applicable error message.
-	 */
-	function error(type) {
-		throw new RangeError(errors[type]);
-	}
-
-	/**
-	 * A generic `Array#map` utility function.
-	 * @private
-	 * @param {Array} array The array to iterate over.
-	 * @param {Function} callback The function that gets called for every array
-	 * item.
-	 * @returns {Array} A new array of values returned by the callback function.
-	 */
-	function map(array, fn) {
-		var length = array.length;
-		var result = [];
-		while (length--) {
-			result[length] = fn(array[length]);
-		}
-		return result;
-	}
-
-	/**
-	 * A simple `Array#map`-like wrapper to work with domain name strings or email
-	 * addresses.
-	 * @private
-	 * @param {String} domain The domain name or email address.
-	 * @param {Function} callback The function that gets called for every
-	 * character.
-	 * @returns {Array} A new string of characters returned by the callback
-	 * function.
-	 */
-	function mapDomain(string, fn) {
-		var parts = string.split('@');
-		var result = '';
-		if (parts.length > 1) {
-			// In email addresses, only the domain name should be punycoded. Leave
-			// the local part (i.e. everything up to `@`) intact.
-			result = parts[0] + '@';
-			string = parts[1];
-		}
-		// Avoid `split(regex)` for IE8 compatibility. See #17.
-		string = string.replace(regexSeparators, '\x2E');
-		var labels = string.split('.');
-		var encoded = map(labels, fn).join('.');
-		return result + encoded;
-	}
-
-	/**
-	 * Creates an array containing the numeric code points of each Unicode
-	 * character in the string. While JavaScript uses UCS-2 internally,
-	 * this function will convert a pair of surrogate halves (each of which
-	 * UCS-2 exposes as separate characters) into a single code point,
-	 * matching UTF-16.
-	 * @see `punycode.ucs2.encode`
-	 * @see <https://mathiasbynens.be/notes/javascript-encoding>
-	 * @memberOf punycode.ucs2
-	 * @name decode
-	 * @param {String} string The Unicode input string (UCS-2).
-	 * @returns {Array} The new array of code points.
-	 */
-	function ucs2decode(string) {
-		var output = [],
-		    counter = 0,
-		    length = string.length,
-		    value,
-		    extra;
-		while (counter < length) {
-			value = string.charCodeAt(counter++);
-			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
-				// high surrogate, and there is a next character
-				extra = string.charCodeAt(counter++);
-				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
-					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
-				} else {
-					// unmatched surrogate; only append this code unit, in case the next
-					// code unit is the high surrogate of a surrogate pair
-					output.push(value);
-					counter--;
-				}
-			} else {
-				output.push(value);
-			}
-		}
-		return output;
-	}
-
-	/**
-	 * Creates a string based on an array of numeric code points.
-	 * @see `punycode.ucs2.decode`
-	 * @memberOf punycode.ucs2
-	 * @name encode
-	 * @param {Array} codePoints The array of numeric code points.
-	 * @returns {String} The new Unicode string (UCS-2).
-	 */
-	function ucs2encode(array) {
-		return map(array, function(value) {
-			var output = '';
-			if (value > 0xFFFF) {
-				value -= 0x10000;
-				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
-				value = 0xDC00 | value & 0x3FF;
-			}
-			output += stringFromCharCode(value);
-			return output;
-		}).join('');
-	}
-
-	/**
-	 * Converts a basic code point into a digit/integer.
-	 * @see `digitToBasic()`
-	 * @private
-	 * @param {Number} codePoint The basic numeric code point value.
-	 * @returns {Number} The numeric value of a basic code point (for use in
-	 * representing integers) in the range `0` to `base - 1`, or `base` if
-	 * the code point does not represent a value.
-	 */
-	function basicToDigit(codePoint) {
-		if (codePoint - 48 < 10) {
-			return codePoint - 22;
-		}
-		if (codePoint - 65 < 26) {
-			return codePoint - 65;
-		}
-		if (codePoint - 97 < 26) {
-			return codePoint - 97;
-		}
-		return base;
-	}
-
-	/**
-	 * Converts a digit/integer into a basic code point.
-	 * @see `basicToDigit()`
-	 * @private
-	 * @param {Number} digit The numeric value of a basic code point.
-	 * @returns {Number} The basic code point whose value (when used for
-	 * representing integers) is `digit`, which needs to be in the range
-	 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
-	 * used; else, the lowercase form is used. The behavior is undefined
-	 * if `flag` is non-zero and `digit` has no uppercase form.
-	 */
-	function digitToBasic(digit, flag) {
-		//  0..25 map to ASCII a..z or A..Z
-		// 26..35 map to ASCII 0..9
-		return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
-	}
-
-	/**
-	 * Bias adaptation function as per section 3.4 of RFC 3492.
-	 * https://tools.ietf.org/html/rfc3492#section-3.4
-	 * @private
-	 */
-	function adapt(delta, numPoints, firstTime) {
-		var k = 0;
-		delta = firstTime ? floor(delta / damp) : delta >> 1;
-		delta += floor(delta / numPoints);
-		for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
-			delta = floor(delta / baseMinusTMin);
-		}
-		return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
-	}
-
-	/**
-	 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
-	 * symbols.
-	 * @memberOf punycode
-	 * @param {String} input The Punycode string of ASCII-only symbols.
-	 * @returns {String} The resulting string of Unicode symbols.
-	 */
-	function decode(input) {
-		// Don't use UCS-2
-		var output = [],
-		    inputLength = input.length,
-		    out,
-		    i = 0,
-		    n = initialN,
-		    bias = initialBias,
-		    basic,
-		    j,
-		    index,
-		    oldi,
-		    w,
-		    k,
-		    digit,
-		    t,
-		    /** Cached calculation results */
-		    baseMinusT;
-
-		// Handle the basic code points: let `basic` be the number of input code
-		// points before the last delimiter, or `0` if there is none, then copy
-		// the first basic code points to the output.
-
-		basic = input.lastIndexOf(delimiter);
-		if (basic < 0) {
-			basic = 0;
-		}
-
-		for (j = 0; j < basic; ++j) {
-			// if it's not a basic code point
-			if (input.charCodeAt(j) >= 0x80) {
-				error('not-basic');
-			}
-			output.push(input.charCodeAt(j));
-		}
-
-		// Main decoding loop: start just after the last delimiter if any basic code
-		// points were copied; start at the beginning otherwise.
-
-		for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {
-
-			// `index` is the index of the next character to be consumed.
-			// Decode a generalized variable-length integer into `delta`,
-			// which gets added to `i`. The overflow checking is easier
-			// if we increase `i` as we go, then subtract off its starting
-			// value at the end to obtain `delta`.
-			for (oldi = i, w = 1, k = base; /* no condition */; k += base) {
-
-				if (index >= inputLength) {
-					error('invalid-input');
-				}
-
-				digit = basicToDigit(input.charCodeAt(index++));
-
-				if (digit >= base || digit > floor((maxInt - i) / w)) {
-					error('overflow');
-				}
-
-				i += digit * w;
-				t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
-
-				if (digit < t) {
-					break;
-				}
-
-				baseMinusT = base - t;
-				if (w > floor(maxInt / baseMinusT)) {
-					error('overflow');
-				}
-
-				w *= baseMinusT;
-
-			}
-
-			out = output.length + 1;
-			bias = adapt(i - oldi, out, oldi == 0);
-
-			// `i` was supposed to wrap around from `out` to `0`,
-			// incrementing `n` each time, so we'll fix that now:
-			if (floor(i / out) > maxInt - n) {
-				error('overflow');
-			}
-
-			n += floor(i / out);
-			i %= out;
-
-			// Insert `n` at position `i` of the output
-			output.splice(i++, 0, n);
-
-		}
-
-		return ucs2encode(output);
-	}
-
-	/**
-	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
-	 * Punycode string of ASCII-only symbols.
-	 * @memberOf punycode
-	 * @param {String} input The string of Unicode symbols.
-	 * @returns {String} The resulting Punycode string of ASCII-only symbols.
-	 */
-	function encode(input) {
-		var n,
-		    delta,
-		    handledCPCount,
-		    basicLength,
-		    bias,
-		    j,
-		    m,
-		    q,
-		    k,
-		    t,
-		    currentValue,
-		    output = [],
-		    /** `inputLength` will hold the number of code points in `input`. */
-		    inputLength,
-		    /** Cached calculation results */
-		    handledCPCountPlusOne,
-		    baseMinusT,
-		    qMinusT;
-
-		// Convert the input in UCS-2 to Unicode
-		input = ucs2decode(input);
-
-		// Cache the length
-		inputLength = input.length;
-
-		// Initialize the state
-		n = initialN;
-		delta = 0;
-		bias = initialBias;
-
-		// Handle the basic code points
-		for (j = 0; j < inputLength; ++j) {
-			currentValue = input[j];
-			if (currentValue < 0x80) {
-				output.push(stringFromCharCode(currentValue));
-			}
-		}
-
-		handledCPCount = basicLength = output.length;
-
-		// `handledCPCount` is the number of code points that have been handled;
-		// `basicLength` is the number of basic code points.
-
-		// Finish the basic string - if it is not empty - with a delimiter
-		if (basicLength) {
-			output.push(delimiter);
-		}
-
-		// Main encoding loop:
-		while (handledCPCount < inputLength) {
-
-			// All non-basic code points < n have been handled already. Find the next
-			// larger one:
-			for (m = maxInt, j = 0; j < inputLength; ++j) {
-				currentValue = input[j];
-				if (currentValue >= n && currentValue < m) {
-					m = currentValue;
-				}
-			}
-
-			// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
-			// but guard against overflow
-			handledCPCountPlusOne = handledCPCount + 1;
-			if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
-				error('overflow');
-			}
-
-			delta += (m - n) * handledCPCountPlusOne;
-			n = m;
-
-			for (j = 0; j < inputLength; ++j) {
-				currentValue = input[j];
-
-				if (currentValue < n && ++delta > maxInt) {
-					error('overflow');
-				}
-
-				if (currentValue == n) {
-					// Represent delta as a generalized variable-length integer
-					for (q = delta, k = base; /* no condition */; k += base) {
-						t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
-						if (q < t) {
-							break;
-						}
-						qMinusT = q - t;
-						baseMinusT = base - t;
-						output.push(
-							stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
-						);
-						q = floor(qMinusT / baseMinusT);
-					}
-
-					output.push(stringFromCharCode(digitToBasic(q, 0)));
-					bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
-					delta = 0;
-					++handledCPCount;
-				}
-			}
-
-			++delta;
-			++n;
-
-		}
-		return output.join('');
-	}
-
-	/**
-	 * Converts a Punycode string representing a domain name or an email address
-	 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
-	 * it doesn't matter if you call it on a string that has already been
-	 * converted to Unicode.
-	 * @memberOf punycode
-	 * @param {String} input The Punycoded domain name or email address to
-	 * convert to Unicode.
-	 * @returns {String} The Unicode representation of the given Punycode
-	 * string.
-	 */
-	function toUnicode(input) {
-		return mapDomain(input, function(string) {
-			return regexPunycode.test(string)
-				? decode(string.slice(4).toLowerCase())
-				: string;
-		});
-	}
-
-	/**
-	 * Converts a Unicode string representing a domain name or an email address to
-	 * Punycode. Only the non-ASCII parts of the domain name will be converted,
-	 * i.e. it doesn't matter if you call it with a domain that's already in
-	 * ASCII.
-	 * @memberOf punycode
-	 * @param {String} input The domain name or email address to convert, as a
-	 * Unicode string.
-	 * @returns {String} The Punycode representation of the given domain name or
-	 * email address.
-	 */
-	function toASCII(input) {
-		return mapDomain(input, function(string) {
-			return regexNonASCII.test(string)
-				? 'xn--' + encode(string)
-				: string;
-		});
-	}
-
-	/*--------------------------------------------------------------------------*/
-
-	/** Define the public API */
-	punycode = {
-		/**
-		 * A string representing the current Punycode.js version number.
-		 * @memberOf punycode
-		 * @type String
-		 */
-		'version': '1.4.1',
-		/**
-		 * An object of methods to convert from JavaScript's internal character
-		 * representation (UCS-2) to Unicode code points, and back.
-		 * @see <https://mathiasbynens.be/notes/javascript-encoding>
-		 * @memberOf punycode
-		 * @type Object
-		 */
-		'ucs2': {
-			'decode': ucs2decode,
-			'encode': ucs2encode
-		},
-		'decode': decode,
-		'encode': encode,
-		'toASCII': toASCII,
-		'toUnicode': toUnicode
-	};
-
-	/** Expose `punycode` */
-	// Some AMD build optimizers, like r.js, check for specific condition patterns
-	// like the following:
-	if (
-		typeof define == 'function' &&
-		typeof define.amd == 'object' &&
-		define.amd
-	) {
-		define('punycode', function() {
-			return punycode;
-		});
-	} else if (freeExports && freeModule) {
-		if (module.exports == freeExports) {
-			// in Node.js, io.js, or RingoJS v0.8.0+
-			freeModule.exports = punycode;
-		} else {
-			// in Narwhal or RingoJS v0.7.0-
-			for (key in punycode) {
-				punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
-			}
-		}
-	} else {
-		// in Rhino or a web browser
-		root.punycode = punycode;
-	}
-
-}(this));
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{}],14:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-'use strict';
-
-// If obj.hasOwnProperty has been overridden, then calling
-// obj.hasOwnProperty(prop) will break.
-// See: https://github.com/joyent/node/issues/1707
-function hasOwnProperty(obj, prop) {
-  return Object.prototype.hasOwnProperty.call(obj, prop);
-}
-
-module.exports = function(qs, sep, eq, options) {
-  sep = sep || '&';
-  eq = eq || '=';
-  var obj = {};
-
-  if (typeof qs !== 'string' || qs.length === 0) {
-    return obj;
-  }
-
-  var regexp = /\+/g;
-  qs = qs.split(sep);
-
-  var maxKeys = 1000;
-  if (options && typeof options.maxKeys === 'number') {
-    maxKeys = options.maxKeys;
-  }
-
-  var len = qs.length;
-  // maxKeys <= 0 means that we should not limit keys count
-  if (maxKeys > 0 && len > maxKeys) {
-    len = maxKeys;
-  }
-
-  for (var i = 0; i < len; ++i) {
-    var x = qs[i].replace(regexp, '%20'),
-        idx = x.indexOf(eq),
-        kstr, vstr, k, v;
-
-    if (idx >= 0) {
-      kstr = x.substr(0, idx);
-      vstr = x.substr(idx + 1);
-    } else {
-      kstr = x;
-      vstr = '';
-    }
-
-    k = decodeURIComponent(kstr);
-    v = decodeURIComponent(vstr);
-
-    if (!hasOwnProperty(obj, k)) {
-      obj[k] = v;
-    } else if (isArray(obj[k])) {
-      obj[k].push(v);
-    } else {
-      obj[k] = [obj[k], v];
-    }
-  }
-
-  return obj;
-};
-
-var isArray = Array.isArray || function (xs) {
-  return Object.prototype.toString.call(xs) === '[object Array]';
-};
-
-},{}],15:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-'use strict';
-
-var stringifyPrimitive = function(v) {
-  switch (typeof v) {
-    case 'string':
-      return v;
-
-    case 'boolean':
-      return v ? 'true' : 'false';
-
-    case 'number':
-      return isFinite(v) ? v : '';
-
-    default:
-      return '';
-  }
-};
-
-module.exports = function(obj, sep, eq, name) {
-  sep = sep || '&';
-  eq = eq || '=';
-  if (obj === null) {
-    obj = undefined;
-  }
-
-  if (typeof obj === 'object') {
-    return map(objectKeys(obj), function(k) {
-      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;
-      if (isArray(obj[k])) {
-        return map(obj[k], function(v) {
-          return ks + encodeURIComponent(stringifyPrimitive(v));
-        }).join(sep);
-      } else {
-        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));
-      }
-    }).join(sep);
-
-  }
-
-  if (!name) return '';
-  return encodeURIComponent(stringifyPrimitive(name)) + eq +
-         encodeURIComponent(stringifyPrimitive(obj));
-};
-
-var isArray = Array.isArray || function (xs) {
-  return Object.prototype.toString.call(xs) === '[object Array]';
-};
-
-function map (xs, f) {
-  if (xs.map) return xs.map(f);
-  var res = [];
-  for (var i = 0; i < xs.length; i++) {
-    res.push(f(xs[i], i));
-  }
-  return res;
-}
-
-var objectKeys = Object.keys || function (obj) {
-  var res = [];
-  for (var key in obj) {
-    if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);
-  }
-  return res;
-};
-
-},{}],16:[function(require,module,exports){
-'use strict';
-
-exports.decode = exports.parse = require('./decode');
-exports.encode = exports.stringify = require('./encode');
-
-},{"./decode":14,"./encode":15}],17:[function(require,module,exports){
-module.exports = sigmund
-function sigmund (subject, maxSessions) {
-    maxSessions = maxSessions || 10;
-    var notes = [];
-    var analysis = '';
-    var RE = RegExp;
-
-    function psychoAnalyze (subject, session) {
-        if (session > maxSessions) return;
-
-        if (typeof subject === 'function' ||
-            typeof subject === 'undefined') {
-            return;
-        }
-
-        if (typeof subject !== 'object' || !subject ||
-            (subject instanceof RE)) {
-            analysis += subject;
-            return;
-        }
-
-        if (notes.indexOf(subject) !== -1 || session === maxSessions) return;
-
-        notes.push(subject);
-        analysis += '{';
-        Object.keys(subject).forEach(function (issue, _, __) {
-            // pseudo-private values.  skip those.
-            if (issue.charAt(0) === '_') return;
-            var to = typeof subject[issue];
-            if (to === 'function' || to === 'undefined') return;
-            analysis += issue;
-            psychoAnalyze(subject[issue], session + 1);
-        });
-    }
-    psychoAnalyze(subject, 0);
-    return analysis;
-}
-
-// vim: set softtabstop=4 shiftwidth=4:
-
-},{}],18:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-var punycode = require('punycode');
-
-exports.parse = urlParse;
-exports.resolve = urlResolve;
-exports.resolveObject = urlResolveObject;
-exports.format = urlFormat;
-
-exports.Url = Url;
-
-function Url() {
-  this.protocol = null;
-  this.slashes = null;
-  this.auth = null;
-  this.host = null;
-  this.port = null;
-  this.hostname = null;
-  this.hash = null;
-  this.search = null;
-  this.query = null;
-  this.pathname = null;
-  this.path = null;
-  this.href = null;
-}
-
-// Reference: RFC 3986, RFC 1808, RFC 2396
-
-// define these here so at least they only have to be
-// compiled once on the first module load.
-var protocolPattern = /^([a-z0-9.+-]+:)/i,
-    portPattern = /:[0-9]*$/,
-
-    // RFC 2396: characters reserved for delimiting URLs.
-    // We actually just auto-escape these.
-    delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],
-
-    // RFC 2396: characters not allowed for various reasons.
-    unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims),
-
-    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.
-    autoEscape = ['\''].concat(unwise),
-    // Characters that are never ever allowed in a hostname.
-    // Note that any invalid chars are also handled, but these
-    // are the ones that are *expected* to be seen, so we fast-path
-    // them.
-    nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),
-    hostEndingChars = ['/', '?', '#'],
-    hostnameMaxLen = 255,
-    hostnamePartPattern = /^[a-z0-9A-Z_-]{0,63}$/,
-    hostnamePartStart = /^([a-z0-9A-Z_-]{0,63})(.*)$/,
-    // protocols that can allow "unsafe" and "unwise" chars.
-    unsafeProtocol = {
-      'javascript': true,
-      'javascript:': true
-    },
-    // protocols that never have a hostname.
-    hostlessProtocol = {
-      'javascript': true,
-      'javascript:': true
-    },
-    // protocols that always contain a // bit.
-    slashedProtocol = {
-      'http': true,
-      'https': true,
-      'ftp': true,
-      'gopher': true,
-      'file': true,
-      'http:': true,
-      'https:': true,
-      'ftp:': true,
-      'gopher:': true,
-      'file:': true
-    },
-    querystring = require('querystring');
-
-function urlParse(url, parseQueryString, slashesDenoteHost) {
-  if (url && isObject(url) && url instanceof Url) return url;
-
-  var u = new Url;
-  u.parse(url, parseQueryString, slashesDenoteHost);
-  return u;
-}
-
-Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
-  if (!isString(url)) {
-    throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
-  }
-
-  var rest = url;
-
-  // trim before proceeding.
-  // This is to support parse stuff like "  http://foo.com  \n"
-  rest = rest.trim();
-
-  var proto = protocolPattern.exec(rest);
-  if (proto) {
-    proto = proto[0];
-    var lowerProto = proto.toLowerCase();
-    this.protocol = lowerProto;
-    rest = rest.substr(proto.length);
-  }
-
-  // figure out if it's got a host
-  // user@server is *always* interpreted as a hostname, and url
-  // resolution will treat //foo/bar as host=foo,path=bar because that's
-  // how the browser resolves relative URLs.
-  if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
-    var slashes = rest.substr(0, 2) === '//';
-    if (slashes && !(proto && hostlessProtocol[proto])) {
-      rest = rest.substr(2);
-      this.slashes = true;
-    }
-  }
-
-  if (!hostlessProtocol[proto] &&
-      (slashes || (proto && !slashedProtocol[proto]))) {
-
-    // there's a hostname.
-    // the first instance of /, ?, ;, or # ends the host.
-    //
-    // If there is an @ in the hostname, then non-host chars *are* allowed
-    // to the left of the last @ sign, unless some host-ending character
-    // comes *before* the @-sign.
-    // URLs are obnoxious.
-    //
-    // ex:
-    // http://a@b@c/ => user:a@b host:c
-    // http://a@b?@c => user:a host:c path:/?@c
-
-    // v0.12 TODO(isaacs): This is not quite how Chrome does things.
-    // Review our test case against browsers more comprehensively.
-
-    // find the first instance of any hostEndingChars
-    var hostEnd = -1;
-    for (var i = 0; i < hostEndingChars.length; i++) {
-      var hec = rest.indexOf(hostEndingChars[i]);
-      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
-        hostEnd = hec;
-    }
-
-    // at this point, either we have an explicit point where the
-    // auth portion cannot go past, or the last @ char is the decider.
-    var auth, atSign;
-    if (hostEnd === -1) {
-      // atSign can be anywhere.
-      atSign = rest.lastIndexOf('@');
-    } else {
-      // atSign must be in auth portion.
-      // http://a@b/c@d => host:b auth:a path:/c@d
-      atSign = rest.lastIndexOf('@', hostEnd);
-    }
-
-    // Now we have a portion which is definitely the auth.
-    // Pull that off.
-    if (atSign !== -1) {
-      auth = rest.slice(0, atSign);
-      rest = rest.slice(atSign + 1);
-      this.auth = decodeURIComponent(auth);
-    }
-
-    // the host is the remaining to the left of the first non-host char
-    hostEnd = -1;
-    for (var i = 0; i < nonHostChars.length; i++) {
-      var hec = rest.indexOf(nonHostChars[i]);
-      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
-        hostEnd = hec;
-    }
-    // if we still have not hit it, then the entire thing is a host.
-    if (hostEnd === -1)
-      hostEnd = rest.length;
-
-    this.host = rest.slice(0, hostEnd);
-    rest = rest.slice(hostEnd);
-
-    // pull out port.
-    this.parseHost();
-
-    // we've indicated that there is a hostname,
-    // so even if it's empty, it has to be present.
-    this.hostname = this.hostname || '';
-
-    // if hostname begins with [ and ends with ]
-    // assume that it's an IPv6 address.
-    var ipv6Hostname = this.hostname[0] === '[' &&
-        this.hostname[this.hostname.length - 1] === ']';
-
-    // validate a little.
-    if (!ipv6Hostname) {
-      var hostparts = this.hostname.split(/\./);
-      for (var i = 0, l = hostparts.length; i < l; i++) {
-        var part = hostparts[i];
-        if (!part) continue;
-        if (!part.match(hostnamePartPattern)) {
-          var newpart = '';
-          for (var j = 0, k = part.length; j < k; j++) {
-            if (part.charCodeAt(j) > 127) {
-              // we replace non-ASCII char with a temporary placeholder
-              // we need this to make sure size of hostname is not
-              // broken by replacing non-ASCII by nothing
-              newpart += 'x';
-            } else {
-              newpart += part[j];
-            }
-          }
-          // we test again with ASCII char only
-          if (!newpart.match(hostnamePartPattern)) {
-            var validParts = hostparts.slice(0, i);
-            var notHost = hostparts.slice(i + 1);
-            var bit = part.match(hostnamePartStart);
-            if (bit) {
-              validParts.push(bit[1]);
-              notHost.unshift(bit[2]);
-            }
-            if (notHost.length) {
-              rest = '/' + notHost.join('.') + rest;
-            }
-            this.hostname = validParts.join('.');
-            break;
-          }
-        }
-      }
-    }
-
-    if (this.hostname.length > hostnameMaxLen) {
-      this.hostname = '';
-    } else {
-      // hostnames are always lower case.
-      this.hostname = this.hostname.toLowerCase();
-    }
-
-    if (!ipv6Hostname) {
-      // IDNA Support: Returns a puny coded representation of "domain".
-      // It only converts the part of the domain name that
-      // has non ASCII characters. I.e. it dosent matter if
-      // you call it with a domain that already is in ASCII.
-      var domainArray = this.hostname.split('.');
-      var newOut = [];
-      for (var i = 0; i < domainArray.length; ++i) {
-        var s = domainArray[i];
-        newOut.push(s.match(/[^A-Za-z0-9_-]/) ?
-            'xn--' + punycode.encode(s) : s);
-      }
-      this.hostname = newOut.join('.');
-    }
-
-    var p = this.port ? ':' + this.port : '';
-    var h = this.hostname || '';
-    this.host = h + p;
-    this.href += this.host;
-
-    // strip [ and ] from the hostname
-    // the host field still retains them, though
-    if (ipv6Hostname) {
-      this.hostname = this.hostname.substr(1, this.hostname.length - 2);
-      if (rest[0] !== '/') {
-        rest = '/' + rest;
-      }
-    }
-  }
-
-  // now rest is set to the post-host stuff.
-  // chop off any delim chars.
-  if (!unsafeProtocol[lowerProto]) {
-
-    // First, make 100% sure that any "autoEscape" chars get
-    // escaped, even if encodeURIComponent doesn't think they
-    // need to be.
-    for (var i = 0, l = autoEscape.length; i < l; i++) {
-      var ae = autoEscape[i];
-      var esc = encodeURIComponent(ae);
-      if (esc === ae) {
-        esc = escape(ae);
-      }
-      rest = rest.split(ae).join(esc);
-    }
-  }
-
-
-  // chop off from the tail first.
-  var hash = rest.indexOf('#');
-  if (hash !== -1) {
-    // got a fragment string.
-    this.hash = rest.substr(hash);
-    rest = rest.slice(0, hash);
-  }
-  var qm = rest.indexOf('?');
-  if (qm !== -1) {
-    this.search = rest.substr(qm);
-    this.query = rest.substr(qm + 1);
-    if (parseQueryString) {
-      this.query = querystring.parse(this.query);
-    }
-    rest = rest.slice(0, qm);
-  } else if (parseQueryString) {
-    // no query string, but parseQueryString still requested
-    this.search = '';
-    this.query = {};
-  }
-  if (rest) this.pathname = rest;
-  if (slashedProtocol[lowerProto] &&
-      this.hostname && !this.pathname) {
-    this.pathname = '/';
-  }
-
-  //to support http.request
-  if (this.pathname || this.search) {
-    var p = this.pathname || '';
-    var s = this.search || '';
-    this.path = p + s;
-  }
-
-  // finally, reconstruct the href based on what has been validated.
-  this.href = this.format();
-  return this;
-};
-
-// format a parsed object into a url string
-function urlFormat(obj) {
-  // ensure it's an object, and not a string url.
-  // If it's an obj, this is a no-op.
-  // this way, you can call url_format() on strings
-  // to clean up potentially wonky urls.
-  if (isString(obj)) obj = urlParse(obj);
-  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
-  return obj.format();
-}
-
-Url.prototype.format = function() {
-  var auth = this.auth || '';
-  if (auth) {
-    auth = encodeURIComponent(auth);
-    auth = auth.replace(/%3A/i, ':');
-    auth += '@';
-  }
-
-  var protocol = this.protocol || '',
-      pathname = this.pathname || '',
-      hash = this.hash || '',
-      host = false,
-      query = '';
-
-  if (this.host) {
-    host = auth + this.host;
-  } else if (this.hostname) {
-    host = auth + (this.hostname.indexOf(':') === -1 ?
-        this.hostname :
-        '[' + this.hostname + ']');
-    if (this.port) {
-      host += ':' + this.port;
-    }
-  }
-
-  if (this.query &&
-      isObject(this.query) &&
-      Object.keys(this.query).length) {
-    query = querystring.stringify(this.query);
-  }
-
-  var search = this.search || (query && ('?' + query)) || '';
-
-  if (protocol && protocol.substr(-1) !== ':') protocol += ':';
-
-  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.
-  // unless they had them to begin with.
-  if (this.slashes ||
-      (!protocol || slashedProtocol[protocol]) && host !== false) {
-    host = '//' + (host || '');
-    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;
-  } else if (!host) {
-    host = '';
-  }
-
-  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;
-  if (search && search.charAt(0) !== '?') search = '?' + search;
-
-  pathname = pathname.replace(/[?#]/g, function(match) {
-    return encodeURIComponent(match);
-  });
-  search = search.replace('#', '%23');
-
-  return protocol + host + pathname + search + hash;
-};
-
-function urlResolve(source, relative) {
-  return urlParse(source, false, true).resolve(relative);
-}
-
-Url.prototype.resolve = function(relative) {
-  return this.resolveObject(urlParse(relative, false, true)).format();
-};
-
-function urlResolveObject(source, relative) {
-  if (!source) return relative;
-  return urlParse(source, false, true).resolveObject(relative);
-}
-
-Url.prototype.resolveObject = function(relative) {
-  if (isString(relative)) {
-    var rel = new Url();
-    rel.parse(relative, false, true);
-    relative = rel;
-  }
-
-  var result = new Url();
-  Object.keys(this).forEach(function(k) {
-    result[k] = this[k];
-  }, this);
-
-  // hash is always overridden, no matter what.
-  // even href="" will remove it.
-  result.hash = relative.hash;
-
-  // if the relative url is empty, then there's nothing left to do here.
-  if (relative.href === '') {
-    result.href = result.format();
-    return result;
-  }
-
-  // hrefs like //foo/bar always cut to the protocol.
-  if (relative.slashes && !relative.protocol) {
-    // take everything except the protocol from relative
-    Object.keys(relative).forEach(function(k) {
-      if (k !== 'protocol')
-        result[k] = relative[k];
-    });
-
-    //urlParse appends trailing / to urls like http://www.example.com
-    if (slashedProtocol[result.protocol] &&
-        result.hostname && !result.pathname) {
-      result.path = result.pathname = '/';
-    }
-
-    result.href = result.format();
-    return result;
-  }
-
-  if (relative.protocol && relative.protocol !== result.protocol) {
-    // if it's a known url protocol, then changing
-    // the protocol does weird things
-    // first, if it's not file:, then we MUST have a host,
-    // and if there was a path
-    // to begin with, then we MUST have a path.
-    // if it is file:, then the host is dropped,
-    // because that's known to be hostless.
-    // anything else is assumed to be absolute.
-    if (!slashedProtocol[relative.protocol]) {
-      Object.keys(relative).forEach(function(k) {
-        result[k] = relative[k];
-      });
-      result.href = result.format();
-      return result;
-    }
-
-    result.protocol = relative.protocol;
-    if (!relative.host && !hostlessProtocol[relative.protocol]) {
-      var relPath = (relative.pathname || '').split('/');
-      while (relPath.length && !(relative.host = relPath.shift()));
-      if (!relative.host) relative.host = '';
-      if (!relative.hostname) relative.hostname = '';
-      if (relPath[0] !== '') relPath.unshift('');
-      if (relPath.length < 2) relPath.unshift('');
-      result.pathname = relPath.join('/');
-    } else {
-      result.pathname = relative.pathname;
-    }
-    result.search = relative.search;
-    result.query = relative.query;
-    result.host = relative.host || '';
-    result.auth = relative.auth;
-    result.hostname = relative.hostname || relative.host;
-    result.port = relative.port;
-    // to support http.request
-    if (result.pathname || result.search) {
-      var p = result.pathname || '';
-      var s = result.search || '';
-      result.path = p + s;
-    }
-    result.slashes = result.slashes || relative.slashes;
-    result.href = result.format();
-    return result;
-  }
-
-  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),
-      isRelAbs = (
-          relative.host ||
-          relative.pathname && relative.pathname.charAt(0) === '/'
-      ),
-      mustEndAbs = (isRelAbs || isSourceAbs ||
-                    (result.host && relative.pathname)),
-      removeAllDots = mustEndAbs,
-      srcPath = result.pathname && result.pathname.split('/') || [],
-      relPath = relative.pathname && relative.pathname.split('/') || [],
-      psychotic = result.protocol && !slashedProtocol[result.protocol];
-
-  // if the url is a non-slashed url, then relative
-  // links like ../.. should be able
-  // to crawl up to the hostname, as well.  This is strange.
-  // result.protocol has already been set by now.
-  // Later on, put the first path part into the host field.
-  if (psychotic) {
-    result.hostname = '';
-    result.port = null;
-    if (result.host) {
-      if (srcPath[0] === '') srcPath[0] = result.host;
-      else srcPath.unshift(result.host);
-    }
-    result.host = '';
-    if (relative.protocol) {
-      relative.hostname = null;
-      relative.port = null;
-      if (relative.host) {
-        if (relPath[0] === '') relPath[0] = relative.host;
-        else relPath.unshift(relative.host);
-      }
-      relative.host = null;
-    }
-    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
-  }
-
-  if (isRelAbs) {
-    // it's absolute.
-    result.host = (relative.host || relative.host === '') ?
-                  relative.host : result.host;
-    result.hostname = (relative.hostname || relative.hostname === '') ?
-                      relative.hostname : result.hostname;
-    result.search = relative.search;
-    result.query = relative.query;
-    srcPath = relPath;
-    // fall through to the dot-handling below.
-  } else if (relPath.length) {
-    // it's relative
-    // throw away the existing file, and take the new path instead.
-    if (!srcPath) srcPath = [];
-    srcPath.pop();
-    srcPath = srcPath.concat(relPath);
-    result.search = relative.search;
-    result.query = relative.query;
-  } else if (!isNullOrUndefined(relative.search)) {
-    // just pull out the search.
-    // like href='?foo'.
-    // Put this after the other two cases because it simplifies the booleans
-    if (psychotic) {
-      result.hostname = result.host = srcPath.shift();
-      //occationaly the auth can get stuck only in host
-      //this especialy happens in cases like
-      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
-      var authInHost = result.host && result.host.indexOf('@') > 0 ?
-                       result.host.split('@') : false;
-      if (authInHost) {
-        result.auth = authInHost.shift();
-        result.host = result.hostname = authInHost.shift();
-      }
-    }
-    result.search = relative.search;
-    result.query = relative.query;
-    //to support http.request
-    if (!isNull(result.pathname) || !isNull(result.search)) {
-      result.path = (result.pathname ? result.pathname : '') +
-                    (result.search ? result.search : '');
-    }
-    result.href = result.format();
-    return result;
-  }
-
-  if (!srcPath.length) {
-    // no path at all.  easy.
-    // we've already handled the other stuff above.
-    result.pathname = null;
-    //to support http.request
-    if (result.search) {
-      result.path = '/' + result.search;
-    } else {
-      result.path = null;
-    }
-    result.href = result.format();
-    return result;
-  }
-
-  // if a url ENDs in . or .., then it must get a trailing slash.
-  // however, if it ends in anything else non-slashy,
-  // then it must NOT get a trailing slash.
-  var last = srcPath.slice(-1)[0];
-  var hasTrailingSlash = (
-      (result.host || relative.host) && (last === '.' || last === '..') ||
-      last === '');
-
-  // strip single dots, resolve double dots to parent dir
-  // if the path tries to go above the root, `up` ends up > 0
-  var up = 0;
-  for (var i = srcPath.length; i >= 0; i--) {
-    last = srcPath[i];
-    if (last == '.') {
-      srcPath.splice(i, 1);
-    } else if (last === '..') {
-      srcPath.splice(i, 1);
-      up++;
-    } else if (up) {
-      srcPath.splice(i, 1);
-      up--;
-    }
-  }
-
-  // if the path is allowed to go above the root, restore leading ..s
-  if (!mustEndAbs && !removeAllDots) {
-    for (; up--; up) {
-      srcPath.unshift('..');
-    }
-  }
-
-  if (mustEndAbs && srcPath[0] !== '' &&
-      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
-    srcPath.unshift('');
-  }
-
-  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {
-    srcPath.push('');
-  }
-
-  var isAbsolute = srcPath[0] === '' ||
-      (srcPath[0] && srcPath[0].charAt(0) === '/');
-
-  // put the host back
-  if (psychotic) {
-    result.hostname = result.host = isAbsolute ? '' :
-                                    srcPath.length ? srcPath.shift() : '';
-    //occationaly the auth can get stuck only in host
-    //this especialy happens in cases like
-    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
-    var authInHost = result.host && result.host.indexOf('@') > 0 ?
-                     result.host.split('@') : false;
-    if (authInHost) {
-      result.auth = authInHost.shift();
-      result.host = result.hostname = authInHost.shift();
-    }
-  }
-
-  mustEndAbs = mustEndAbs || (result.host && srcPath.length);
-
-  if (mustEndAbs && !isAbsolute) {
-    srcPath.unshift('');
-  }
-
-  if (!srcPath.length) {
-    result.pathname = null;
-    result.path = null;
-  } else {
-    result.pathname = srcPath.join('/');
-  }
-
-  //to support request.http
-  if (!isNull(result.pathname) || !isNull(result.search)) {
-    result.path = (result.pathname ? result.pathname : '') +
-                  (result.search ? result.search : '');
-  }
-  result.auth = relative.auth || result.auth;
-  result.slashes = result.slashes || relative.slashes;
-  result.href = result.format();
-  return result;
-};
-
-Url.prototype.parseHost = function() {
-  var host = this.host;
-  var port = portPattern.exec(host);
-  if (port) {
-    port = port[0];
-    if (port !== ':') {
-      this.port = port.substr(1);
-    }
-    host = host.substr(0, host.length - port.length);
-  }
-  if (host) this.hostname = host;
-};
-
-function isString(arg) {
-  return typeof arg === "string";
-}
-
-function isObject(arg) {
-  return typeof arg === 'object' && arg !== null;
-}
-
-function isNull(arg) {
-  return arg === null;
-}
-function isNullOrUndefined(arg) {
-  return  arg == null;
-}
-
-},{"punycode":13,"querystring":16}],19:[function(require,module,exports){
-(function (Buffer){
-var Filer = require('..');
-var util = require('../tests/lib/test-utils.js');
-
-function setImmediate(cb) {
-  setTimeout(cb, 0);
-}
-
-function parse_query() {
-  var query = window.location.search.substring(1);
-  var parsed = {};
-  query.split('&').forEach(function(pair) {
-    pair = pair.split('=');
-    var key = decodeURIComponent(pair[0]);
-    var value = decodeURIComponent(pair[1]);
-    parsed[key] = value;
-  });
-  return parsed;
-}
-
-var query = parse_query();
-
-function time(test, cb) {
-  var start = performance.now();
-  function done() {
-    var end = performance.now();
-    cb(end - start);
-  }
-  test(done);
-}
-
-var random_data = new Buffer(1024); // 1kB buffer
-var read_buffer = new Buffer(1024);
-
-function run(iter) {
-  iter = (undefined == iter) ? 0 : iter;
-
-  function before() {
-    util.setup(function() {
-      setImmediate(during);
-    });
-  }
-
-  function during() {
-    var fs = util.fs();
-
-    window.crypto.getRandomValues(random_data);
-    time(function(done) {
-      fs.mkdir('/tmp', function(err) {
-        fs.stat('/tmp', function(err, stats) {
-          fs.open('/tmp/test', 'w', function(err, fd) {
-            fs.write(fd, random_data, null, null, null, function(err, nbytes) {
-              fs.close(fd, function(err) {
-                fs.stat('/tmp/test', function(err, stats) {
-                  fs.open('/tmp/test', 'r', function(err, fd) {
-                    fs.read(fd, read_buffer, null, null, null, function(err, nbytes) {
-                      fs.close(fd, function(err) {
-                        fs.unlink('/tmp/test', function(err) {
-                          done();
-                        });});});});});});});});});});
-                      }, after);
-  }
-
-  function after(dt) {
-    util.cleanup(complete.bind(null, iter, dt));
-  }
-
-  before();
-}
-
-var results = [];
-function complete(iter, result) {
-  results.push(result);
-
-  if(++iter < iterations) {
-    setImmediate(run.bind(null, iter));
-  } else {
-    do_stats();
-  }
-
-  progress.value = iter;
-}
-
-function do_stats() {
-  var output = document.getElementById("output");
-  var stats = {
-    mean: ss.mean(results) + " ms",
-    min: ss.min(results),
-    max: ss.max(results),
-    med_abs_dev: ss.median_absolute_deviation(results),
-  };
-
-  var t = document.createElement("table");
-  var tbody = document.createElement("tbody");
-  var keys = Object.keys(stats);
-  keys.forEach(function(key) {
-    var row = document.createElement("tr");
-
-    var key_cell = document.createElement("td");
-    var key_cell_text = document.createTextNode(key);
-    key_cell.appendChild(key_cell_text);
-    row.appendChild(key_cell);
-
-    var val_cell = document.createElement("td");
-    var val_cell_text = document.createTextNode(stats[key]);
-    val_cell.appendChild(val_cell_text);
-    row.appendChild(val_cell);
-
-    tbody.appendChild(row);
-  });
-
-  t.appendChild(tbody);
-  output.appendChild(t);
-}
-
-var query = parse_query();
-var iterations = query.iterations || 10;
-var progress = document.getElementById("progress");
-progress.max = iterations;
-
-run();
-
-}).call(this,require("buffer").Buffer)
-},{"..":28,"../tests/lib/test-utils.js":43,"buffer":7}],20:[function(require,module,exports){
-(function (Buffer){
-function FilerBuffer (subject, encoding, nonZero) {
-
-  // Automatically turn ArrayBuffer into Uint8Array so that underlying
-  // Buffer code doesn't just throw away and ignore ArrayBuffer data.
-  if (subject instanceof ArrayBuffer) {
-    subject = new Uint8Array(subject);
-  }
-
-  return new Buffer(subject, encoding, nonZero);
-};
-
-// Inherit prototype from Buffer
-FilerBuffer.prototype = Object.create(Buffer.prototype);
-FilerBuffer.prototype.constructor = FilerBuffer;
-
-// Also copy static methods onto FilerBuffer ctor
-Object.keys(Buffer).forEach(function (p) {
-  if (Buffer.hasOwnProperty(p)) {
-    FilerBuffer[p] = Buffer[p];
-  }
-});
-
-module.exports = FilerBuffer;
-
-}).call(this,require("buffer").Buffer)
-},{"buffer":7}],21:[function(require,module,exports){
-var O_READ = 'READ';
-var O_WRITE = 'WRITE';
-var O_CREATE = 'CREATE';
-var O_EXCLUSIVE = 'EXCLUSIVE';
-var O_TRUNCATE = 'TRUNCATE';
-var O_APPEND = 'APPEND';
-var XATTR_CREATE = 'CREATE';
-var XATTR_REPLACE = 'REPLACE';
-
-module.exports = {
-  FILE_SYSTEM_NAME: 'local',
-
-  FILE_STORE_NAME: 'files',
-
-  IDB_RO: 'readonly',
-  IDB_RW: 'readwrite',
-
-  WSQL_VERSION: "1",
-  WSQL_SIZE: 5 * 1024 * 1024,
-  WSQL_DESC: "FileSystem Storage",
-
-  NODE_TYPE_FILE: 'FILE',
-  NODE_TYPE_DIRECTORY: 'DIRECTORY',
-  NODE_TYPE_SYMBOLIC_LINK: 'SYMLINK',
-  NODE_TYPE_META: 'META',
-
-  S_IFREG: 0x8000,
-  S_IFDIR: 0x4000,
-  S_IFLNK: 0xA000,
-
-  DEFAULT_DIR_PERMISSIONS: 0x1ED, // 755
-  DEFAULT_FILE_PERMISSIONS: 0x1A4, // 644
-
-  SYMLOOP_MAX: 10,
-
-  BINARY_MIME_TYPE: 'application/octet-stream',
-  JSON_MIME_TYPE: 'application/json',
-
-  ROOT_DIRECTORY_NAME: '/', // basename(normalize(path))
-
-  // FS Mount Flags
-  FS_FORMAT: 'FORMAT',
-  FS_NOCTIME: 'NOCTIME',
-  FS_NOMTIME: 'NOMTIME',
-  FS_NODUPEIDCHECK: 'FS_NODUPEIDCHECK',
-
-  // FS File Open Flags
-  O_READ: O_READ,
-  O_WRITE: O_WRITE,
-  O_CREATE: O_CREATE,
-  O_EXCLUSIVE: O_EXCLUSIVE,
-  O_TRUNCATE: O_TRUNCATE,
-  O_APPEND: O_APPEND,
-
-  O_FLAGS: {
-    'r': [O_READ],
-    'r+': [O_READ, O_WRITE],
-    'w': [O_WRITE, O_CREATE, O_TRUNCATE],
-    'w+': [O_WRITE, O_READ, O_CREATE, O_TRUNCATE],
-    'wx': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],
-    'wx+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],
-    'a': [O_WRITE, O_CREATE, O_APPEND],
-    'a+': [O_WRITE, O_READ, O_CREATE, O_APPEND],
-    'ax': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_APPEND],
-    'ax+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_APPEND]
-  },
-
-  XATTR_CREATE: XATTR_CREATE,
-  XATTR_REPLACE: XATTR_REPLACE,
-
-  FS_READY: 'READY',
-  FS_PENDING: 'PENDING',
-  FS_ERROR: 'ERROR',
-
-  SUPER_NODE_ID: '00000000-0000-0000-0000-000000000000',
-
-  // Reserved File Descriptors for streams
-  STDIN: 0,
-  STDOUT: 1,
-  STDERR: 2,
-  FIRST_DESCRIPTOR: 3,
-
-  ENVIRONMENT: {
-    TMP: '/tmp',
-    PATH: ''
-  }
-};
-
-},{}],22:[function(require,module,exports){
-var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;
-
-module.exports = function DirectoryEntry(id, type) {
-  this.id = id;
-  this.type = type || NODE_TYPE_FILE;
-};
-
-},{"./constants.js":21}],23:[function(require,module,exports){
-(function (Buffer){
-// Adapt encodings to work with Buffer or Uint8Array, they expect the latter
-function decode(buf) {
-  return buf.toString('utf8');
-}
-
-function encode(string) {
-  return new Buffer(string, 'utf8');
-}
-
-module.exports = {
-  encode: encode,
-  decode: decode
-};
-
-}).call(this,require("buffer").Buffer)
-},{"buffer":7}],24:[function(require,module,exports){
-var errors = {};
-[
-  /**
-   * node.js errors - we only use some of these, add as needed.
-   */
-  //'-1:UNKNOWN:unknown error',
-  //'0:OK:success',
-  //'1:EOF:end of file',
-  //'2:EADDRINFO:getaddrinfo error',
-  //'3:EACCES:permission denied',
-  //'4:EAGAIN:resource temporarily unavailable',
-  //'5:EADDRINUSE:address already in use',
-  //'6:EADDRNOTAVAIL:address not available',
-  //'7:EAFNOSUPPORT:address family not supported',
-  //'8:EALREADY:connection already in progress',
-  '9:EBADF:bad file descriptor',
-  '10:EBUSY:resource busy or locked',
-  //'11:ECONNABORTED:software caused connection abort',
-  //'12:ECONNREFUSED:connection refused',
-  //'13:ECONNRESET:connection reset by peer',
-  //'14:EDESTADDRREQ:destination address required',
-  //'15:EFAULT:bad address in system call argument',
-  //'16:EHOSTUNREACH:host is unreachable',
-  //'17:EINTR:interrupted system call',
-  '18:EINVAL:invalid argument',
-  //'19:EISCONN:socket is already connected',
-  //'20:EMFILE:too many open files',
-  //'21:EMSGSIZE:message too long',
-  //'22:ENETDOWN:network is down',
-  //'23:ENETUNREACH:network is unreachable',
-  //'24:ENFILE:file table overflow',
-  //'25:ENOBUFS:no buffer space available',
-  //'26:ENOMEM:not enough memory',
-  '27:ENOTDIR:not a directory',
-  '28:EISDIR:illegal operation on a directory',
-  //'29:ENONET:machine is not on the network',
-  // errno 30 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js
-  //'31:ENOTCONN:socket is not connected',
-  //'32:ENOTSOCK:socket operation on non-socket',
-  //'33:ENOTSUP:operation not supported on socket',
-  '34:ENOENT:no such file or directory',
-  //'35:ENOSYS:function not implemented',
-  //'36:EPIPE:broken pipe',
-  //'37:EPROTO:protocol error',
-  //'38:EPROTONOSUPPORT:protocol not supported',
-  //'39:EPROTOTYPE:protocol wrong type for socket',
-  //'40:ETIMEDOUT:connection timed out',
-  //'41:ECHARSET:invalid Unicode character',
-  //'42:EAIFAMNOSUPPORT:address family for hostname not supported',
-  // errno 43 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js
-  //'44:EAISERVICE:servname not supported for ai_socktype',
-  //'45:EAISOCKTYPE:ai_socktype not supported',
-  //'46:ESHUTDOWN:cannot send after transport endpoint shutdown',
-  '47:EEXIST:file already exists',
-  //'48:ESRCH:no such process',
-  //'49:ENAMETOOLONG:name too long',
-  '50:EPERM:operation not permitted',
-  '51:ELOOP:too many symbolic links encountered',
-  //'52:EXDEV:cross-device link not permitted',
-  '53:ENOTEMPTY:directory not empty',
-  //'54:ENOSPC:no space left on device',
-  '55:EIO:i/o error',
-  //'56:EROFS:read-only file system',
-  //'57:ENODEV:no such device',
-  //'58:ESPIPE:invalid seek',
-  //'59:ECANCELED:operation canceled',
-
-  /**
-   * Filer specific errors
-   */
-  '1000:ENOTMOUNTED:not mounted',
-  '1001:EFILESYSTEMERROR:missing super node, use \'FORMAT\' flag to format filesystem.',
-  '1002:ENOATTR:attribute does not exist'
-
-].forEach(function(e) {
-  e = e.split(':');
-  var errno = +e[0];
-  var errName = e[1];
-  var defaultMessage = e[2];
-
-  function FilerError(msg, path) {
-    Error.call(this);
-
-    this.name = errName;
-    this.code = errName;
-    this.errno = errno;
-    this.message = msg || defaultMessage;
-    if(path) {
-      this.path = path;
-    }
-    this.stack = (new Error(this.message)).stack;
-  }
-  FilerError.prototype = Object.create(Error.prototype);
-  FilerError.prototype.constructor = FilerError;
-  FilerError.prototype.toString = function() {
-    var pathInfo = this.path ? (', \'' + this.path + '\'') : '';
-    return this.name + ': ' + this.message + pathInfo;
-  };
-
-  // We expose the error as both Errors.EINVAL and Errors[18]
-  errors[errName] = errors[errno] = FilerError;
-});
-
-module.exports = errors;
-
-},{}],25:[function(require,module,exports){
-var _ = require('../../lib/nodash.js');
-
-var Path = require('../path.js');
-var normalize = Path.normalize;
-var dirname = Path.dirname;
-var basename = Path.basename;
-var isAbsolutePath = Path.isAbsolute;
-var isNullPath = Path.isNull;
-
-var Constants = require('../constants.js');
-var NODE_TYPE_FILE = Constants.NODE_TYPE_FILE;
-var NODE_TYPE_DIRECTORY = Constants.NODE_TYPE_DIRECTORY;
-var NODE_TYPE_SYMBOLIC_LINK = Constants.NODE_TYPE_SYMBOLIC_LINK;
-var NODE_TYPE_META = Constants.NODE_TYPE_META;
-
-var ROOT_DIRECTORY_NAME = Constants.ROOT_DIRECTORY_NAME;
-var SUPER_NODE_ID = Constants.SUPER_NODE_ID;
-var SYMLOOP_MAX = Constants.SYMLOOP_MAX;
-
-var O_READ = Constants.O_READ;
-var O_WRITE = Constants.O_WRITE;
-var O_CREATE = Constants.O_CREATE;
-var O_EXCLUSIVE = Constants.O_EXCLUSIVE;
-var O_TRUNCATE = Constants.O_TRUNCATE;
-var O_APPEND = Constants.O_APPEND;
-var O_FLAGS = Constants.O_FLAGS;
-
-var XATTR_CREATE = Constants.XATTR_CREATE;
-var XATTR_REPLACE = Constants.XATTR_REPLACE;
-var FS_NOMTIME = Constants.FS_NOMTIME;
-var FS_NOCTIME = Constants.FS_NOCTIME;
-
-var Encoding = require('../encoding.js');
-var Errors = require('../errors.js');
-var DirectoryEntry = require('../directory-entry.js');
-var OpenFileDescription = require('../open-file-description.js');
-var SuperNode = require('../super-node.js');
-var Node = require('../node.js');
-var Stats = require('../stats.js');
-var Buffer = require('../buffer.js');
-
-/**
- * Update node times. Only passed times are modified (undefined times are ignored)
- * and filesystem flags are examined in order to override update logic.
- */
-function update_node_times(context, path, node, times, callback) {
-  var update = false;
-
-  // Honour mount flags for how we update times
-  var flags = context.flags;
-  if(_(flags).contains(FS_NOCTIME)) {
-    delete times.ctime;
-  }
-   if(_(flags).contains(FS_NOMTIME)) {
-    delete times.mtime;
-  }
-
-  if(times.ctime) {
-    node.ctime = times.ctime;
-    // We don't do atime tracking for perf reasons, but do mirror ctime
-    node.atime = times.ctime;
-    update = true;
-  }
-  if(times.atime) {
-    // The only time we explicitly pass atime is when utimes(), futimes() is called.
-    // Override ctime mirror here if so
-    node.atime = times.atime;
-    update = true;
-  }
-  if(times.mtime) {
-    node.mtime = times.mtime;
-    update = true;
-  }
-
-  function complete(error) {
-    context.changes.push({ event: 'change', path: path });
-    callback(error);
-  }
-
-  if(update) {
-    context.putObject(node.id, node, complete);
-  } else {
-    complete();
-  }
-}
-
-/**
- * make_node()
- */
-// in: file or directory path
-// out: new node representing file/directory
-function make_node(context, path, type, callback) {
-  if(type !== NODE_TYPE_DIRECTORY && type !== NODE_TYPE_FILE) {
-    return callback(new Errors.EINVAL('type must be a directory or file', path));
-  }
-
-  path = normalize(path);
-
-  var name = basename(path);
-  var parentPath = dirname(path);
-  var parentNode;
-  var parentNodeData;
-  var node;
-
-  // Check if the parent node exists
-  function create_node_in_parent(error, parentDirectoryNode) {
-    if(error) {
-      callback(error);
-    } else if(parentDirectoryNode.type !== NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));
-    } else {
-      parentNode = parentDirectoryNode;
-      find_node(context, path, check_if_node_exists);
-    }
-  }
-
-  // Check if the node to be created already exists
-  function check_if_node_exists(error, result) {
-    if(!error && result) {
-      callback(new Errors.EEXIST('path name already exists', path));
-    } else if(error && !(error instanceof Errors.ENOENT)) {
-      callback(error);
-    } else {
-      context.getObject(parentNode.data, create_node);
-    }
-  }
-
-  // Create the new node
-  function create_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      parentNodeData = result;
-      Node.create({
-        path: path,
-        guid: context.guid,
-        type: type
-      }, function(error, result) {
-        if(error) {
-          callback(error);
-          return;
-        }
-        node = result;
-        node.nlinks += 1;
-        context.putObject(node.id, node, update_parent_node_data);
-      });
-    }
-  }
-
-  // Update parent node time
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, node, { mtime: now, ctime: now }, callback);
-    }
-  }
-
-  // Update the parent nodes data
-  function update_parent_node_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      parentNodeData[name] = new DirectoryEntry(node.id, type);
-      context.putObject(parentNode.data, parentNodeData, update_time);
-    }
-  }
-
-  // Find the parent node
-  find_node(context, parentPath, create_node_in_parent);
-}
-
-/**
- * find_node
- */
-// in: file or directory path
-// out: node structure, or error
-function find_node(context, path, callback) {
-  path = normalize(path);
-  if(!path) {
-    return callback(new Errors.ENOENT('path is an empty string'));
-  }
-  var name = basename(path);
-  var parentPath = dirname(path);
-  var followedCount = 0;
-
-  function read_root_directory_node(error, superNode) {
-    if(error) {
-      callback(error);
-    } else if(!superNode || superNode.type !== NODE_TYPE_META || !superNode.rnode) {
-      callback(new Errors.EFILESYSTEMERROR());
-    } else {
-      context.getObject(superNode.rnode, check_root_directory_node);
-    }
-  }
-
-  function check_root_directory_node(error, rootDirectoryNode) {
-    if(error) {
-      callback(error);
-    } else if(!rootDirectoryNode) {
-      callback(new Errors.ENOENT());
-    } else {
-      callback(null, rootDirectoryNode);
-    }
-  }
-
-  // in: parent directory node
-  // out: parent directory data
-  function read_parent_directory_data(error, parentDirectoryNode) {
-    if(error) {
-      callback(error);
-    } else if(parentDirectoryNode.type !== NODE_TYPE_DIRECTORY || !parentDirectoryNode.data) {
-      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));
-    } else {
-      context.getObject(parentDirectoryNode.data, get_node_from_parent_directory_data);
-    }
-  }
-
-  // in: parent directory data
-  // out: searched node
-  function get_node_from_parent_directory_data(error, parentDirectoryData) {
-    if(error) {
-      callback(error);
-    } else {
-      if(!_(parentDirectoryData).has(name)) {
-        callback(new Errors.ENOENT(null, path));
-      } else {
-        var nodeId = parentDirectoryData[name].id;
-        context.getObject(nodeId, is_symbolic_link);
-      }
-    }
-  }
-
-  function is_symbolic_link(error, node) {
-    if(error) {
-      callback(error);
-    } else {
-      if(node.type == NODE_TYPE_SYMBOLIC_LINK) {
-        followedCount++;
-        if(followedCount > SYMLOOP_MAX){
-          callback(new Errors.ELOOP(null, path));
-        } else {
-          follow_symbolic_link(node.data);
-        }
-      } else {
-        callback(null, node);
-      }
-    }
-  }
-
-  function follow_symbolic_link(data) {
-    data = normalize(data);
-    parentPath = dirname(data);
-    name = basename(data);
-    if(ROOT_DIRECTORY_NAME == name) {
-      context.getObject(SUPER_NODE_ID, read_root_directory_node);
-    } else {
-      find_node(context, parentPath, read_parent_directory_data);
-    }
-  }
-
-  if(ROOT_DIRECTORY_NAME == name) {
-    context.getObject(SUPER_NODE_ID, read_root_directory_node);
-  } else {
-    find_node(context, parentPath, read_parent_directory_data);
-  }
-}
-
-
-/**
- * set extended attribute (refactor)
- */
-function set_extended_attribute (context, path, node, name, value, flag, callback) {
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      update_node_times(context, path, node, { ctime: Date.now() }, callback);
-    }
-  }
-
-  var xattrs = node.xattrs;
-
-  if (flag === XATTR_CREATE && xattrs.hasOwnProperty(name)) {
-    callback(new Errors.EEXIST('attribute already exists', path));
-  }
-  else if (flag === XATTR_REPLACE && !xattrs.hasOwnProperty(name)) {
-    callback(new Errors.ENOATTR(null, path));
-  }
-  else {
-    xattrs[name] = value;
-    context.putObject(node.id, node, update_time);
-  }
-}
-
-/**
- * ensure_root_directory. Creates a root node if necessary.
- *
- * Note: this should only be invoked when formatting a new file system.
- * Multiple invocations of this by separate instances will still result
- * in only a single super node.
- */
-function ensure_root_directory(context, callback) {
-  var superNode;
-  var directoryNode;
-  var directoryData;
-
-  function ensure_super_node(error, existingNode) {
-    if(!error && existingNode) {
-      // Another instance has beat us and already created the super node.
-      callback();
-    } else if(error && !(error instanceof Errors.ENOENT)) {
-      callback(error);
-    } else {
-      SuperNode.create({ guid: context.guid }, function(error, result) {
-        if(error) {
-          callback(error);
-          return;
-        }
-        superNode = result;
-        context.putObject(superNode.id, superNode, write_directory_node);
-      });
-    }
-  }
-
-  function write_directory_node(error) {
-    if(error) {
-      callback(error);
-    } else {
-      Node.create({
-        guid: context.guid,
-        id: superNode.rnode,
-        type: NODE_TYPE_DIRECTORY,
-        path: ROOT_DIRECTORY_NAME
-      }, function(error, result) {
-        if(error) {
-          callback(error);
-          return;
-        }
-        directoryNode = result;
-        directoryNode.nlinks += 1;
-        context.putObject(directoryNode.id, directoryNode, write_directory_data);
-      });
-    }
-  }
-
-  function write_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = {};
-      context.putObject(directoryNode.data, directoryData, callback);
-    }
-  }
-
-  context.getObject(SUPER_NODE_ID, ensure_super_node);
-}
-
-/**
- * make_directory
- */
-function make_directory(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-  var parentDirectoryNode;
-  var parentDirectoryData;
-
-  function check_if_directory_exists(error, result) {
-    if(!error && result) {
-      callback(new Errors.EEXIST(null, path));
-    } else if(error && !(error instanceof Errors.ENOENT)) {
-      callback(error);
-    } else {
-      find_node(context, parentPath, read_parent_directory_data);
-    }
-  }
-
-  function read_parent_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      parentDirectoryNode = result;
-      context.getObject(parentDirectoryNode.data, write_directory_node);
-    }
-  }
-
-  function write_directory_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      parentDirectoryData = result;
-      Node.create({
-        guid: context.guid,
-        type: NODE_TYPE_DIRECTORY,
-        path: path
-      }, function(error, result) {
-        if(error) {
-          callback(error);
-          return;
-        }
-        directoryNode = result;
-        directoryNode.nlinks += 1;
-        context.putObject(directoryNode.id, directoryNode, write_directory_data);
-      });
-    }
-  }
-
-  function write_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = {};
-      context.putObject(directoryNode.data, directoryData, update_parent_directory_data);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, callback);
-    }
-  }
-
-  function update_parent_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      parentDirectoryData[name] = new DirectoryEntry(directoryNode.id, NODE_TYPE_DIRECTORY);
-      context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);
-    }
-  }
-
-  find_node(context, path, check_if_directory_exists);
-}
-
-/**
- * remove_directory
- */
-function remove_directory(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-  var parentDirectoryNode;
-  var parentDirectoryData;
-
-  function read_parent_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      parentDirectoryNode = result;
-      context.getObject(parentDirectoryNode.data, check_if_node_exists);
-    }
-  }
-
-  function check_if_node_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else if(ROOT_DIRECTORY_NAME == name) {
-      callback(new Errors.EBUSY(null, path));
-    } else if(!_(result).has(name)) {
-      callback(new Errors.ENOENT(null, path));
-    } else {
-      parentDirectoryData = result;
-      directoryNode = parentDirectoryData[name].id;
-      context.getObject(directoryNode, check_if_node_is_directory);
-    }
-  }
-
-  function check_if_node_is_directory(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type != NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOTDIR(null, path));
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_directory_is_empty);
-    }
-  }
-
-  function check_if_directory_is_empty(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(_(directoryData).size() > 0) {
-        callback(new Errors.ENOTEMPTY(null, path));
-      } else {
-        remove_directory_entry_from_parent_directory_node();
-      }
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, remove_directory_node);
-    }
-  }
-
-  function remove_directory_entry_from_parent_directory_node() {
-    delete parentDirectoryData[name];
-    context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);
-  }
-
-  function remove_directory_node(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.delete(directoryNode.id, remove_directory_data);
-    }
-  }
-
-  function remove_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.delete(directoryNode.data, callback);
-    }
-  }
-
-  find_node(context, parentPath, read_parent_directory_data);
-}
-
-function open_file(context, path, flags, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-  var directoryEntry;
-  var fileNode;
-  var fileData;
-
-  var followedCount = 0;
-
-  if(ROOT_DIRECTORY_NAME == name) {
-    if(_(flags).contains(O_WRITE)) {
-      callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
-    } else {
-      find_node(context, path, set_file_node);
-    }
-  } else {
-    find_node(context, parentPath, read_directory_data);
-  }
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type !== NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOENT(null, path));
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-    }
-  }
-
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(_(directoryData).has(name)) {
-        if(_(flags).contains(O_EXCLUSIVE)) {
-          callback(new Errors.ENOENT('O_CREATE and O_EXCLUSIVE are set, and the named file exists', path));
-        } else {
-          directoryEntry = directoryData[name];
-          if(directoryEntry.type == NODE_TYPE_DIRECTORY && _(flags).contains(O_WRITE)) {
-            callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
-          } else {
-            context.getObject(directoryEntry.id, check_if_symbolic_link);
-          }
-        }
-      } else {
-        if(!_(flags).contains(O_CREATE)) {
-          callback(new Errors.ENOENT('O_CREATE is not set and the named file does not exist', path));
-        } else {
-          write_file_node();
-        }
-      }
-    }
-  }
-
-  function check_if_symbolic_link(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      var node = result;
-      if(node.type == NODE_TYPE_SYMBOLIC_LINK) {
-        followedCount++;
-        if(followedCount > SYMLOOP_MAX){
-          callback(new Errors.ELOOP(null, path));
-        } else {
-          follow_symbolic_link(node.data);
-        }
-      } else {
-        set_file_node(undefined, node);
-      }
-    }
-  }
-
-  function follow_symbolic_link(data) {
-    data = normalize(data);
-    parentPath = dirname(data);
-    name = basename(data);
-    if(ROOT_DIRECTORY_NAME == name) {
-      if(_(flags).contains(O_WRITE)) {
-        callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
-      } else {
-        find_node(context, path, set_file_node);
-      }
-    }
-    find_node(context, parentPath, read_directory_data);
-  }
-
-  function set_file_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      callback(null, fileNode);
-    }
-  }
-
-  function write_file_node() {
-    Node.create({
-      guid: context.guid,
-      type: NODE_TYPE_FILE,
-      path: path
-    }, function(error, result) {
-      if(error) {
-        callback(error);
-        return;
-      }
-      fileNode = result;
-      fileNode.nlinks += 1;
-      context.putObject(fileNode.id, fileNode, write_file_data);
-    });
-  }
-
-  function write_file_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      fileData = new Buffer(0);
-      fileData.fill(0);
-      context.putBuffer(fileNode.data, fileData, update_directory_data);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, handle_update_result);
-    }
-  }
-
-  function update_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_FILE);
-      context.putObject(directoryNode.data, directoryData, update_time);
-    }
-  }
-
-  function handle_update_result(error) {
-    if(error) {
-      callback(error);
-    } else {
-      callback(null, fileNode);
-    }
-  }
-}
-
-function replace_data(context, ofd, buffer, offset, length, callback) {
-  var fileNode;
-
-  function return_nbytes(error) {
-    if(error) {
-      callback(error);
-    } else {
-      callback(null, length);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);
-    }
-  }
-
-  function update_file_node(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.putObject(fileNode.id, fileNode, update_time);
-    }
-  }
-
-  function write_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      var newData = new Buffer(length);
-      newData.fill(0);
-      buffer.copy(newData, 0, offset, offset + length);
-      ofd.position = length;
-
-      fileNode.size = length;
-      fileNode.version += 1;
-
-      context.putBuffer(fileNode.data, newData, update_file_node);
-    }
-  }
-
-  context.getObject(ofd.id, write_file_data);
-}
-
-function write_data(context, ofd, buffer, offset, length, position, callback) {
-  var fileNode;
-  var fileData;
-
-  function return_nbytes(error) {
-    if(error) {
-      callback(error);
-    } else {
-      callback(null, length);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);
-    }
-  }
-
-  function update_file_node(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.putObject(fileNode.id, fileNode, update_time);
-    }
-  }
-
-  function update_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileData = result;
-      if(!fileData) {
-        return callback(new Errors.EIO('Expected Buffer'));
-      }
-      var _position = (!(undefined === position || null === position)) ? position : ofd.position;
-      var newSize = Math.max(fileData.length, _position + length);
-      var newData = new Buffer(newSize);
-      newData.fill(0);
-      if(fileData) {
-        fileData.copy(newData);
-      }
-      buffer.copy(newData, _position, offset, offset + length);
-      if(undefined === position) {
-        ofd.position += length;
-      }
-
-      fileNode.size = newSize;
-      fileNode.version += 1;
-
-      context.putBuffer(fileNode.data, newData, update_file_node);
-    }
-  }
-
-  function read_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      context.getBuffer(fileNode.data, update_file_data);
-    }
-  }
-
-  context.getObject(ofd.id, read_file_data);
-}
-
-function read_data(context, ofd, buffer, offset, length, position, callback) {
-  var fileNode;
-  var fileData;
-
-  function handle_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileData = result;
-      if(!fileData) {
-        return callback(new Errors.EIO('Expected Buffer'));
-      }
-      var _position = (!(undefined === position || null === position)) ? position : ofd.position;
-      length = (_position + length > buffer.length) ? length - _position : length;
-      fileData.copy(buffer, offset, _position, _position + length);
-      if(undefined === position) {
-        ofd.position += length;
-      }
-      callback(null, length);
-    }
-  }
-
-  function read_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type === NODE_TYPE_DIRECTORY) {
-      callback(new Errors.EISDIR('the named file is a directory', ofd.path));
-    } else {
-      fileNode = result;
-      context.getBuffer(fileNode.data, handle_file_data);
-    }
-  }
-
-  context.getObject(ofd.id, read_file_data);
-}
-
-function stat_file(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  find_node(context, path, callback);
-}
-
-function fstat_file(context, ofd, callback) {
-  ofd.getNode(context, callback);
-}
-
-function lstat_file(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-
-  if(ROOT_DIRECTORY_NAME == name) {
-    find_node(context, path, callback);
-  } else {
-    find_node(context, parentPath, read_directory_data);
-  }
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-    }
-  }
-
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(!_(directoryData).has(name)) {
-        callback(new Errors.ENOENT('a component of the path does not name an existing file', path));
-      } else {
-        context.getObject(directoryData[name].id, callback);
-      }
-    }
-  }
-}
-
-function link_node(context, oldpath, newpath, callback) {
-  oldpath = normalize(oldpath);
-  var oldname = basename(oldpath);
-  var oldParentPath = dirname(oldpath);
-
-  newpath = normalize(newpath);
-  var newname = basename(newpath);
-  var newParentPath = dirname(newpath);
-  var ctime = Date.now();
-
-  var oldDirectoryNode;
-  var oldDirectoryData;
-  var newDirectoryNode;
-  var newDirectoryData;
-  var fileNodeID;
-  var fileNode;
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);
-    }
-  }
-
-  function update_file_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      fileNode.nlinks += 1;
-      context.putObject(fileNode.id, fileNode, update_time);
-    }
-  }
-
-  function read_file_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      context.getObject(fileNodeID, update_file_node);
-    }
-  }
-
-  function check_if_new_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newDirectoryData = result;
-      if(_(newDirectoryData).has(newname)) {
-        callback(new Errors.EEXIST('newpath resolves to an existing file', newname));
-      } else {
-        newDirectoryData[newname] = oldDirectoryData[oldname];
-        fileNodeID = newDirectoryData[newname].id;
-        context.putObject(newDirectoryNode.data, newDirectoryData, read_file_node);
-      }
-    }
-  }
-
-  function read_new_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newDirectoryNode = result;
-      context.getObject(newDirectoryNode.data, check_if_new_file_exists);
-    }
-  }
-
-  function check_if_old_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      oldDirectoryData = result;
-      if(!_(oldDirectoryData).has(oldname)) {
-        callback(new Errors.ENOENT('a component of either path prefix does not exist', oldname));
-      } else if(oldDirectoryData[oldname].type === NODE_TYPE_DIRECTORY) {
-        callback(new Errors.EPERM('oldpath refers to a directory'));
-      } else {
-        find_node(context, newParentPath, read_new_directory_data);
-      }
-    }
-  }
-
-  function read_old_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      oldDirectoryNode = result;
-      context.getObject(oldDirectoryNode.data, check_if_old_file_exists);
-    }
-  }
-
-  find_node(context, oldParentPath, read_old_directory_data);
-}
-
-function unlink_node(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-  var fileNode;
-
-  function update_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      delete directoryData[name];
-      context.putObject(directoryNode.data, directoryData, function(error) {
-        var now = Date.now();
-        update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);
-      });
-    }
-  }
-
-  function delete_file_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.delete(fileNode.data, update_directory_data);
-    }
-  }
-
-  function update_file_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      fileNode.nlinks -= 1;
-      if(fileNode.nlinks < 1) {
-        context.delete(fileNode.id, delete_file_data);
-      } else {
-        context.putObject(fileNode.id, fileNode, function(error) {
-          update_node_times(context, path, fileNode, { ctime: Date.now() }, update_directory_data);
-        });
-      }
-    }
-  }
-
-  function check_if_node_is_directory(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type === NODE_TYPE_DIRECTORY) {
-      callback(new Errors.EPERM('unlink not permitted on directories', name));
-    } else {
-      update_file_node(null, result);
-    }
-  }
-
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(!_(directoryData).has(name)) {
-        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));
-      } else {
-        context.getObject(directoryData[name].id, check_if_node_is_directory);
-      }
-    }
-  }
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-    }
-  }
-
-  find_node(context, parentPath, read_directory_data);
-}
-
-function read_directory(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-
-  var directoryNode;
-  var directoryData;
-
-  function handle_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      var files = Object.keys(directoryData);
-      callback(null, files);
-    }
-  }
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type !== NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOTDIR(null, path));
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, handle_directory_data);
-    }
-  }
-
-  find_node(context, path, read_directory_data);
-}
-
-function make_symbolic_link(context, srcpath, dstpath, callback) {
-  dstpath = normalize(dstpath);
-  var name = basename(dstpath);
-  var parentPath = dirname(dstpath);
-
-  var directoryNode;
-  var directoryData;
-  var fileNode;
-
-  if(ROOT_DIRECTORY_NAME == name) {
-    callback(new Errors.EEXIST(null, name));
-  } else {
-    find_node(context, parentPath, read_directory_data);
-  }
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-    }
-  }
-
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(_(directoryData).has(name)) {
-        callback(new Errors.EEXIST(null, name));
-      } else {
-        write_file_node();
-      }
-    }
-  }
-
-  function write_file_node() {
-    Node.create({
-      guid: context.guid,
-      type: NODE_TYPE_SYMBOLIC_LINK,
-      path: dstpath
-    }, function(error, result) {
-      if(error) {
-        callback(error);
-        return;
-      }
-      fileNode = result;
-      fileNode.nlinks += 1;
-      fileNode.size = srcpath.length;
-      fileNode.data = srcpath;
-      context.putObject(fileNode.id, fileNode, update_directory_data);
-    });
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);
-    }
-  }
-
-  function update_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_SYMBOLIC_LINK);
-      context.putObject(directoryNode.data, directoryData, update_time);
-    }
-  }
-}
-
-function read_link(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-
-  find_node(context, parentPath, read_directory_data);
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-    }
-  }
-
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(!_(directoryData).has(name)) {
-        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));
-      } else {
-        context.getObject(directoryData[name].id, check_if_symbolic);
-      }
-    }
-  }
-
-  function check_if_symbolic(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      if(result.type != NODE_TYPE_SYMBOLIC_LINK) {
-        callback(new Errors.EINVAL('path not a symbolic link', path));
-      } else {
-        callback(null, result.data);
-      }
-    }
-  }
-}
-
-function truncate_file(context, path, length, callback) {
-  path = normalize(path);
-
-  var fileNode;
-
-  function read_file_data (error, node) {
-    if (error) {
-      callback(error);
-    } else if(node.type == NODE_TYPE_DIRECTORY ) {
-      callback(new Errors.EISDIR(null, path));
-    } else{
-      fileNode = node;
-      context.getBuffer(fileNode.data, truncate_file_data);
-    }
-  }
-
-  function truncate_file_data(error, fileData) {
-    if (error) {
-      callback(error);
-    } else {
-      if(!fileData) {
-        return callback(new Errors.EIO('Expected Buffer'));
-      }
-      var data = new Buffer(length);
-      data.fill(0);
-      if(fileData) {
-        fileData.copy(data);
-      }
-      context.putBuffer(fileNode.data, data, update_file_node);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, path, fileNode, { mtime: now, ctime: now }, callback);
-    }
-  }
-
-  function update_file_node (error) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode.size = length;
-      fileNode.version += 1;
-      context.putObject(fileNode.id, fileNode, update_time);
-    }
-  }
-
-  if(length < 0) {
-    callback(new Errors.EINVAL('length cannot be negative'));
-  } else {
-    find_node(context, path, read_file_data);
-  }
-}
-
-function ftruncate_file(context, ofd, length, callback) {
-  var fileNode;
-
-  function read_file_data (error, node) {
-    if (error) {
-      callback(error);
-    } else if(node.type == NODE_TYPE_DIRECTORY ) {
-      callback(new Errors.EISDIR());
-    } else{
-      fileNode = node;
-      context.getBuffer(fileNode.data, truncate_file_data);
-    }
-  }
-
-  function truncate_file_data(error, fileData) {
-    if (error) {
-      callback(error);
-    } else {
-      var data;
-      if(!fileData) {
-        return callback(new Errors.EIO('Expected Buffer'));
-      }
-      if(fileData) {
-        data = fileData.slice(0, length);
-      } else {
-        data = new Buffer(length);
-        data.fill(0);
-      }
-      context.putBuffer(fileNode.data, data, update_file_node);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, callback);
-    }
-  }
-
-  function update_file_node (error) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode.size = length;
-      fileNode.version += 1;
-      context.putObject(fileNode.id, fileNode, update_time);
-    }
-  }
-
-  if(length < 0) {
-    callback(new Errors.EINVAL('length cannot be negative'));
-  } else {
-    ofd.getNode(context, read_file_data);
-  }
-}
-
-function utimes_file(context, path, atime, mtime, callback) {
-  path = normalize(path);
-
-  function update_times(error, node) {
-    if (error) {
-      callback(error);
-    } else {
-      update_node_times(context, path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);
-    }
-  }
-
-  if (typeof atime != 'number' || typeof mtime != 'number') {
-    callback(new Errors.EINVAL('atime and mtime must be number', path));
-  }
-  else if (atime < 0 || mtime < 0) {
-    callback(new Errors.EINVAL('atime and mtime must be positive integers', path));
-  }
-  else {
-    find_node(context, path, update_times);
-  }
-}
-
-function futimes_file(context, ofd, atime, mtime, callback) {
-
-  function update_times (error, node) {
-    if (error) {
-      callback(error);
-    } else {
-      update_node_times(context, ofd.path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);
-    }
-  }
-
-  if (typeof atime != 'number' || typeof mtime != 'number') {
-    callback(new Errors.EINVAL('atime and mtime must be a number'));
-  }
-  else if (atime < 0 || mtime < 0) {
-    callback(new Errors.EINVAL('atime and mtime must be positive integers'));
-  }
-  else {
-    ofd.getNode(context, update_times);
-  }
-}
-
-function setxattr_file(context, path, name, value, flag, callback) {
-  path = normalize(path);
-
-  function setxattr(error, node) {
-    if(error) {
-      return callback(error);
-    }
-    set_extended_attribute(context, path, node, name, value, flag, callback);
-  }
-
-  if (typeof name != 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string', path));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
-  }
-  else if (flag !== null &&
-           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {
-    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE', path));
-  }
-  else {
-    find_node(context, path, setxattr);
-  }
-}
-
-function fsetxattr_file (context, ofd, name, value, flag, callback) {
-  function setxattr(error, node) {
-    if(error) {
-      return callback(error);
-    }
-    set_extended_attribute(context, ofd.path, node, name, value, flag, callback);
-  }
-
-  if (typeof name !== 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string'));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string'));
-  }
-  else if (flag !== null &&
-           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {
-    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE'));
-  }
-  else {
-    ofd.getNode(context, setxattr);
-  }
-}
-
-function getxattr_file (context, path, name, callback) {
-  path = normalize(path);
-
-  function get_xattr(error, node) {
-    if(error) {
-      return callback(error);
-    }
-
-    var xattrs = node.xattrs;
-
-    if (!xattrs.hasOwnProperty(name)) {
-      callback(new Errors.ENOATTR(null, path));
-    }
-    else {
-      callback(null, xattrs[name]);
-    }
-  }
-
-  if (typeof name != 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string', path));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
-  }
-  else {
-    find_node(context, path, get_xattr);
-  }
-}
-
-function fgetxattr_file (context, ofd, name, callback) {
-
-  function get_xattr (error, node) {
-    if (error) {
-      return callback(error);
-    }
-
-    var xattrs = node.xattrs;
-
-    if (!xattrs.hasOwnProperty(name)) {
-      callback(new Errors.ENOATTR());
-    }
-    else {
-      callback(null, xattrs[name]);
-    }
-  }
-
-  if (typeof name != 'string') {
-    callback(new Errors.EINVAL());
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string'));
-  }
-  else {
-    ofd.getNode(context, get_xattr);
-  }
-}
-
-function removexattr_file (context, path, name, callback) {
-  path = normalize(path);
-
-  function remove_xattr (error, node) {
-    if (error) {
-      return callback(error);
-    }
-
-    function update_time(error) {
-      if(error) {
-        callback(error);
-      } else {
-        update_node_times(context, path, node, { ctime: Date.now() }, callback);
-      }
-    }
-
-    var xattrs = node.xattrs;
-
-    if (!xattrs.hasOwnProperty(name)) {
-      callback(new Errors.ENOATTR(null, path));
-    }
-    else {
-      delete xattrs[name];
-      context.putObject(node.id, node, update_time);
-    }
-  }
-
-  if (typeof name !== 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string', path));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
-  }
-  else {
-    find_node(context, path, remove_xattr);
-  }
-}
-
-function fremovexattr_file (context, ofd, name, callback) {
-
-  function remove_xattr (error, node) {
-    if (error) {
-      return callback(error);
-    }
-
-    function update_time(error) {
-      if(error) {
-        callback(error);
-      } else {
-        update_node_times(context, ofd.path, node, { ctime: Date.now() }, callback);
-      }
-    }
-
-    var xattrs = node.xattrs;
-
-    if (!xattrs.hasOwnProperty(name)) {
-      callback(new Errors.ENOATTR());
-    }
-    else {
-      delete xattrs[name];
-      context.putObject(node.id, node, update_time);
-    }
-  }
-
-  if (typeof name != 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string'));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string'));
-  }
-  else {
-    ofd.getNode(context, remove_xattr);
-  }
-}
-
-function validate_flags(flags) {
-  if(!_(O_FLAGS).has(flags)) {
-    return null;
-  }
-  return O_FLAGS[flags];
-}
-
-function validate_file_options(options, enc, fileMode){
-  if(!options) {
-    options = { encoding: enc, flag: fileMode };
-  } else if(typeof options === "function") {
-    options = { encoding: enc, flag: fileMode };
-  } else if(typeof options === "string") {
-    options = { encoding: options, flag: fileMode };
-  }
-  return options;
-}
-
-function pathCheck(path, callback) {
-  var err;
-
-  if(!path) {
-    err = new Errors.EINVAL('Path must be a string', path);
-  } else if(isNullPath(path)) {
-    err = new Errors.EINVAL('Path must be a string without null bytes.', path);
-  } else if(!isAbsolutePath(path)) {
-    err = new Errors.EINVAL('Path must be absolute.', path);
-  }
-
-  if(err) {
-    callback(err);
-    return false;
-  }
-  return true;
-}
-
-
-function open(fs, context, path, flags, mode, callback) {
-  // NOTE: we support the same signature as node with a `mode` arg,
-  // but ignore it.
-  callback = arguments[arguments.length - 1];
-  if(!pathCheck(path, callback)) return;
-
-  function check_result(error, fileNode) {
-    if(error) {
-      callback(error);
-    } else {
-      var position;
-      if(_(flags).contains(O_APPEND)) {
-        position = fileNode.size;
-      } else {
-        position = 0;
-      }
-      var openFileDescription = new OpenFileDescription(path, fileNode.id, flags, position);
-      var fd = fs.allocDescriptor(openFileDescription);
-      callback(null, fd);
-    }
-  }
-
-  flags = validate_flags(flags);
-  if(!flags) {
-    callback(new Errors.EINVAL('flags is not valid'), path);
-  }
-
-  open_file(context, path, flags, check_result);
-}
-
-function close(fs, context, fd, callback) {
-  if(!_(fs.openFiles).has(fd)) {
-    callback(new Errors.EBADF());
-  } else {
-    fs.releaseDescriptor(fd);
-    callback(null);
-  }
-}
-
-function mknod(fs, context, path, type, callback) {
-  if(!pathCheck(path, callback)) return;
-  make_node(context, path, type, callback);
-}
-
-function mkdir(fs, context, path, mode, callback) {
-  // NOTE: we support passing a mode arg, but we ignore it internally for now.
-  callback = arguments[arguments.length - 1];
-  if(!pathCheck(path, callback)) return;
-  make_directory(context, path, callback);
-}
-
-function rmdir(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-  remove_directory(context, path, callback);
-}
-
-function stat(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-
-  function check_result(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      var stats = new Stats(path, result, fs.name);
-      callback(null, stats);
-    }
-  }
-
-  stat_file(context, path, check_result);
-}
-
-function fstat(fs, context, fd, callback) {
-  function check_result(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      var stats = new Stats(fd.path, result, fs.name);
-      callback(null, stats);
-    }
-  }
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else {
-    fstat_file(context, ofd, check_result);
-  }
-}
-
-function link(fs, context, oldpath, newpath, callback) {
-  if(!pathCheck(oldpath, callback)) return;
-  if(!pathCheck(newpath, callback)) return;
-  link_node(context, oldpath, newpath, callback);
-}
-
-function unlink(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-  unlink_node(context, path, callback);
-}
-
-function read(fs, context, fd, buffer, offset, length, position, callback) {
-  // Follow how node.js does this
-  function wrapped_cb(err, bytesRead) {
-    // Retain a reference to buffer so that it can't be GC'ed too soon.
-    callback(err, bytesRead || 0, buffer);
-  }
-
-  offset = (undefined === offset) ? 0 : offset;
-  length = (undefined === length) ? buffer.length - offset : length;
-  callback = arguments[arguments.length - 1];
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_READ)) {
-    callback(new Errors.EBADF('descriptor does not permit reading'));
-  } else {
-    read_data(context, ofd, buffer, offset, length, position, wrapped_cb);
-  }
-}
-
-function readFile(fs, context, path, options, callback) {
-  callback = arguments[arguments.length - 1];
-  options = validate_file_options(options, null, 'r');
-
-  if(!pathCheck(path, callback)) return;
-
-  var flags = validate_flags(options.flag || 'r');
-  if(!flags) {
-    return callback(new Errors.EINVAL('flags is not valid', path));
-  }
-
-  open_file(context, path, flags, function(err, fileNode) {
-    if(err) {
-      return callback(err);
-    }
-    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);
-    var fd = fs.allocDescriptor(ofd);
-
-    function cleanup() {
-      fs.releaseDescriptor(fd);
-    }
-
-    fstat_file(context, ofd, function(err, fstatResult) {
-      if(err) {
-        cleanup();
-        return callback(err);
-      }
-
-      var stats = new Stats(ofd.path, fstatResult, fs.name);
-
-      if(stats.isDirectory()) {
-        cleanup();
-        return callback(new Errors.EISDIR('illegal operation on directory', path));
-      }
-
-      var size = stats.size;
-      var buffer = new Buffer(size);
-      buffer.fill(0);
-
-      read_data(context, ofd, buffer, 0, size, 0, function(err, nbytes) {
-        cleanup();
-
-        if(err) {
-          return callback(err);
-        }
-
-        var data;
-        if(options.encoding === 'utf8') {
-          data = Encoding.decode(buffer);
-        } else {
-          data = buffer;
-        }
-        callback(null, data);
-      });
-    });
-  });
-}
-
-function write(fs, context, fd, buffer, offset, length, position, callback) {
-  callback = arguments[arguments.length - 1];
-  offset = (undefined === offset) ? 0 : offset;
-  length = (undefined === length) ? buffer.length - offset : length;
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  } else if(buffer.length - offset < length) {
-    callback(new Errors.EIO('intput buffer is too small'));
-  } else {
-    write_data(context, ofd, buffer, offset, length, position, callback);
-  }
-}
-
-function writeFile(fs, context, path, data, options, callback) {
-  callback = arguments[arguments.length - 1];
-  options = validate_file_options(options, 'utf8', 'w');
-
-  if(!pathCheck(path, callback)) return;
-
-  var flags = validate_flags(options.flag || 'w');
-  if(!flags) {
-    return callback(new Errors.EINVAL('flags is not valid', path));
-  }
-
-  data = data || '';
-  if(typeof data === "number") {
-    data = '' + data;
-  }
-  if(typeof data === "string" && options.encoding === 'utf8') {
-    data = Encoding.encode(data);
-  }
-
-  open_file(context, path, flags, function(err, fileNode) {
-    if(err) {
-      return callback(err);
-    }
-    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);
-    var fd = fs.allocDescriptor(ofd);
-
-    replace_data(context, ofd, data, 0, data.length, function(err, nbytes) {
-      fs.releaseDescriptor(fd);
-
-      if(err) {
-        return callback(err);
-      }
-      callback(null);
-    });
-  });
-}
-
-function appendFile(fs, context, path, data, options, callback) {
-  callback = arguments[arguments.length - 1];
-  options = validate_file_options(options, 'utf8', 'a');
-
-  if(!pathCheck(path, callback)) return;
-
-  var flags = validate_flags(options.flag || 'a');
-  if(!flags) {
-    return callback(new Errors.EINVAL('flags is not valid', path));
-  }
-
-  data = data || '';
-  if(typeof data === "number") {
-    data = '' + data;
-  }
-  if(typeof data === "string" && options.encoding === 'utf8') {
-    data = Encoding.encode(data);
-  }
-
-  open_file(context, path, flags, function(err, fileNode) {
-    if(err) {
-      return callback(err);
-    }
-    var ofd = new OpenFileDescription(path, fileNode.id, flags, fileNode.size);
-    var fd = fs.allocDescriptor(ofd);
-
-    write_data(context, ofd, data, 0, data.length, ofd.position, function(err, nbytes) {
-      fs.releaseDescriptor(fd);
-
-      if(err) {
-        return callback(err);
-      }
-      callback(null);
-    });
-  });
-}
-
-function exists(fs, context, path, callback) {
-  function cb(err, stats) {
-    callback(err ? false : true);
-  }
-  stat(fs, context, path, cb);
-}
-
-function getxattr(fs, context, path, name, callback) {
-  if (!pathCheck(path, callback)) return;
-  getxattr_file(context, path, name, callback);
-}
-
-function fgetxattr(fs, context, fd, name, callback) {
-  var ofd = fs.openFiles[fd];
-  if (!ofd) {
-    callback(new Errors.EBADF());
-  }
-  else {
-    fgetxattr_file(context, ofd, name, callback);
-  }
-}
-
-function setxattr(fs, context, path, name, value, flag, callback) {
-  if(typeof flag === 'function') {
-    callback = flag;
-    flag = null;
-  }
-
-  if (!pathCheck(path, callback)) return;
-  setxattr_file(context, path, name, value, flag, callback);
-}
-
-function fsetxattr(fs, context, fd, name, value, flag, callback) {
-  if(typeof flag === 'function') {
-    callback = flag;
-    flag = null;
-  }
-
-  var ofd = fs.openFiles[fd];
-  if (!ofd) {
-    callback(new Errors.EBADF());
-  }
-  else if (!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  }
-  else {
-    fsetxattr_file(context, ofd, name, value, flag, callback);
-  }
-}
-
-function removexattr(fs, context, path, name, callback) {
-  if (!pathCheck(path, callback)) return;
-  removexattr_file(context, path, name, callback);
-}
-
-function fremovexattr(fs, context, fd, name, callback) {
-  var ofd = fs.openFiles[fd];
-  if (!ofd) {
-    callback(new Errors.EBADF());
-  }
-  else if (!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  }
-  else {
-    fremovexattr_file(context, ofd, name, callback);
-  }
-}
-
-function lseek(fs, context, fd, offset, whence, callback) {
-  function update_descriptor_position(error, stats) {
-    if(error) {
-      callback(error);
-    } else {
-      if(stats.size + offset < 0) {
-        callback(new Errors.EINVAL('resulting file offset would be negative'));
-      } else {
-        ofd.position = stats.size + offset;
-        callback(null, ofd.position);
-      }
-    }
-  }
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  }
-
-  if('SET' === whence) {
-    if(offset < 0) {
-      callback(new Errors.EINVAL('resulting file offset would be negative'));
-    } else {
-      ofd.position = offset;
-      callback(null, ofd.position);
-    }
-  } else if('CUR' === whence) {
-    if(ofd.position + offset < 0) {
-      callback(new Errors.EINVAL('resulting file offset would be negative'));
-    } else {
-      ofd.position += offset;
-      callback(null, ofd.position);
-    }
-  } else if('END' === whence) {
-    fstat_file(context, ofd, update_descriptor_position);
-  } else {
-    callback(new Errors.EINVAL('whence argument is not a proper value'));
-  }
-}
-
-function readdir(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-  read_directory(context, path, callback);
-}
-
-function utimes(fs, context, path, atime, mtime, callback) {
-  if(!pathCheck(path, callback)) return;
-
-  var currentTime = Date.now();
-  atime = (atime) ? atime : currentTime;
-  mtime = (mtime) ? mtime : currentTime;
-
-  utimes_file(context, path, atime, mtime, callback);
-}
-
-function futimes(fs, context, fd, atime, mtime, callback) {
-  var currentTime = Date.now();
-  atime = (atime) ? atime : currentTime;
-  mtime = (mtime) ? mtime : currentTime;
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  } else {
-    futimes_file(context, ofd, atime, mtime, callback);
-  }
-}
-
-function rename(fs, context, oldpath, newpath, callback) {
-  if(!pathCheck(oldpath, callback)) return;
-  if(!pathCheck(newpath, callback)) return;
-
-  oldpath = normalize(oldpath);
-  newpath = normalize(newpath);
-
-  var oldParentPath = Path.dirname(oldpath);
-  var newParentPath = Path.dirname(oldpath);
-  var oldName = Path.basename(oldpath);
-  var newName = Path.basename(newpath);
-  var oldParentDirectory, oldParentData;
-  var newParentDirectory, newParentData;
-  var ctime = Date.now();
-  var fileNode;
-
-  function update_times(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);
-    }
-  }
-
-  function read_new_directory(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.getObject(newParentData[newName].id, update_times);
-    }
-  }
-
-  function update_old_parent_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      if(oldParentDirectory.id === newParentDirectory.id) {
-        oldParentData = newParentData;
-      }
-      delete oldParentData[oldName];
-      context.putObject(oldParentDirectory.data, oldParentData, read_new_directory);
-    }
-  }
-
-  function update_new_parent_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      newParentData[newName] = oldParentData[oldName];
-      context.putObject(newParentDirectory.data, newParentData, update_old_parent_directory_data);
-    }
-  }
-
-  function check_if_new_directory_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newParentData = result;
-      if(_(newParentData).has(newName)) {
-        remove_directory(context, newpath, update_new_parent_directory_data);
-      } else {
-        update_new_parent_directory_data();
-      }
-    }
-  }
-
-  function read_new_parent_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newParentDirectory = result;
-      context.getObject(newParentDirectory.data, check_if_new_directory_exists);
-    }
-  }
-
-  function get_new_parent_directory(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      oldParentData = result;
-      find_node(context, newParentPath, read_new_parent_directory_data);
-    }
-  }
-
-  function read_parent_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      oldParentDirectory = result;
-      context.getObject(result.data, get_new_parent_directory);
-    }
-  }
-
-  function unlink_old_file(error) {
-    if(error) {
-      callback(error);
-    } else {
-      unlink_node(context, oldpath, callback);
-    }
-  }
-
-  function check_node_type(error, node) {
-    if(error) {
-      callback(error);
-    } else if(node.type === NODE_TYPE_DIRECTORY) {
-      find_node(context, oldParentPath, read_parent_directory_data);
-    } else {
-      link_node(context, oldpath, newpath, unlink_old_file);
-    }
-  }
-
-  find_node(context, oldpath, check_node_type);
-}
-
-function symlink(fs, context, srcpath, dstpath, type, callback) {
-  // NOTE: we support passing the `type` arg, but ignore it.
-  callback = arguments[arguments.length - 1];
-  if(!pathCheck(srcpath, callback)) return;
-  if(!pathCheck(dstpath, callback)) return;
-  make_symbolic_link(context, srcpath, dstpath, callback);
-}
-
-function readlink(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-  read_link(context, path, callback);
-}
-
-function lstat(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-
-  function check_result(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      var stats = new Stats(path, result, fs.name);
-      callback(null, stats);
-    }
-  }
-
-  lstat_file(context, path, check_result);
-}
-
-function truncate(fs, context, path, length, callback) {
-  // NOTE: length is optional
-  callback = arguments[arguments.length - 1];
-  length = length || 0;
-
-  if(!pathCheck(path, callback)) return;
-  truncate_file(context, path, length, callback);
-}
-
-function ftruncate(fs, context, fd, length, callback) {
-  // NOTE: length is optional
-  callback = arguments[arguments.length - 1];
-  length = length || 0;
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  } else {
-    ftruncate_file(context, ofd, length, callback);
-  }
-}
-
-module.exports = {
-  ensureRootDirectory: ensure_root_directory,
-  open: open,
-  close: close,
-  mknod: mknod,
-  mkdir: mkdir,
-  rmdir: rmdir,
-  unlink: unlink,
-  stat: stat,
-  fstat: fstat,
-  link: link,
-  read: read,
-  readFile: readFile,
-  write: write,
-  writeFile: writeFile,
-  appendFile: appendFile,
-  exists: exists,
-  getxattr: getxattr,
-  fgetxattr: fgetxattr,
-  setxattr: setxattr,
-  fsetxattr: fsetxattr,
-  removexattr: removexattr,
-  fremovexattr: fremovexattr,
-  lseek: lseek,
-  readdir: readdir,
-  utimes: utimes,
-  futimes: futimes,
-  rename: rename,
-  symlink: symlink,
-  readlink: readlink,
-  lstat: lstat,
-  truncate: truncate,
-  ftruncate: ftruncate
-};
-
-},{"../../lib/nodash.js":4,"../buffer.js":20,"../constants.js":21,"../directory-entry.js":22,"../encoding.js":23,"../errors.js":24,"../node.js":29,"../open-file-description.js":30,"../path.js":31,"../stats.js":39,"../super-node.js":40}],26:[function(require,module,exports){
-var _ = require('../../lib/nodash.js');
-
-var isNullPath = require('../path.js').isNull;
-var nop = require('../shared.js').nop;
-
-var Constants = require('../constants.js');
-var FILE_SYSTEM_NAME = Constants.FILE_SYSTEM_NAME;
-var FS_FORMAT = Constants.FS_FORMAT;
-var FS_READY = Constants.FS_READY;
-var FS_PENDING = Constants.FS_PENDING;
-var FS_ERROR = Constants.FS_ERROR;
-var FS_NODUPEIDCHECK = Constants.FS_NODUPEIDCHECK;
-
-var providers = require('../providers/index.js');
-
-var Shell = require('../shell/shell.js');
-var Intercom = require('../../lib/intercom.js');
-var FSWatcher = require('../fs-watcher.js');
-var Errors = require('../errors.js');
-var defaultGuidFn = require('../shared.js').guid;
-
-var STDIN = Constants.STDIN;
-var STDOUT = Constants.STDOUT;
-var STDERR = Constants.STDERR;
-var FIRST_DESCRIPTOR = Constants.FIRST_DESCRIPTOR;
-
-// The core fs operations live on impl
-var impl = require('./implementation.js');
-
-// node.js supports a calling pattern that leaves off a callback.
-function maybeCallback(callback) {
-  if(typeof callback === "function") {
-    return callback;
-  }
-  return function(err) {
-    if(err) {
-      throw err;
-    }
-  };
-}
-
-// Default callback that logs an error if passed in
-function defaultCallback(err) {
-  if(err) {
-    console.error('Filer error: ', err);
-  }
-}
-
-/**
- * FileSystem
- *
- * A FileSystem takes an `options` object, which can specify a number of,
- * options.  All options are optional, and include:
- *
- * name: the name of the file system, defaults to "local"
- *
- * flags: one or more flags to use when creating/opening the file system.
- *        For example: "FORMAT" will cause the file system to be formatted.
- *        No explicit flags are set by default.
- *
- * provider: an explicit storage provider to use for the file
- *           system's database context provider.  A number of context
- *           providers are included (see /src/providers), and users
- *           can write one of their own and pass it in to be used.
- *           By default an IndexedDB provider is used.
- *
- * guid: a function for generating unique IDs for nodes in the filesystem.
- *       Use this to override the built-in UUID generation. (Used mainly for tests).
- *
- * callback: a callback function to be executed when the file system becomes
- *           ready for use. Depending on the context provider used, this might
- *           be right away, or could take some time. The callback should expect
- *           an `error` argument, which will be null if everything worked.  Also
- *           users should check the file system's `readyState` and `error`
- *           properties to make sure it is usable.
- */
-function FileSystem(options, callback) {
-  options = options || {};
-  callback = callback || defaultCallback;
-
-  var flags = options.flags;
-  var guid = options.guid ? options.guid : defaultGuidFn;
-  var provider = options.provider || new providers.Default(options.name || FILE_SYSTEM_NAME);
-  // If we're given a provider, match its name unless we get an explicit name
-  var name = options.name || provider.name;
-  var forceFormatting = _(flags).contains(FS_FORMAT);
-
-  var fs = this;
-  fs.readyState = FS_PENDING;
-  fs.name = name;
-  fs.error = null;
-
-  fs.stdin = STDIN;
-  fs.stdout = STDOUT;
-  fs.stderr = STDERR;
-
-  // Expose Shell constructor
-  this.Shell = Shell.bind(undefined, this);
-
-  // Safely expose the list of open files and file
-  // descriptor management functions
-  var openFiles = {};
-  var nextDescriptor = FIRST_DESCRIPTOR;
-  Object.defineProperty(this, "openFiles", {
-    get: function() { return openFiles; }
-  });
-  this.allocDescriptor = function(openFileDescription) {
-    var fd = nextDescriptor ++;
-    openFiles[fd] = openFileDescription;
-    return fd;
-  };
-  this.releaseDescriptor = function(fd) {
-    delete openFiles[fd];
-  };
-
-  // Safely expose the operation queue
-  var queue = [];
-  this.queueOrRun = function(operation) {
-    var error;
-
-    if(FS_READY == fs.readyState) {
-      operation.call(fs);
-    } else if(FS_ERROR == fs.readyState) {
-      error = new Errors.EFILESYSTEMERROR('unknown error');
-    } else {
-      queue.push(operation);
-    }
-
-    return error;
-  };
-  function runQueued() {
-    queue.forEach(function(operation) {
-      operation.call(this);
-    }.bind(fs));
-    queue = null;
-  }
-
-  // We support the optional `options` arg from node, but ignore it
-  this.watch = function(filename, options, listener) {
-    if(isNullPath(filename)) {
-      throw new Error('Path must be a string without null bytes.');
-    }
-    if(typeof options === 'function') {
-      listener = options;
-      options = {};
-    }
-    options = options || {};
-    listener = listener || nop;
-
-    var watcher = new FSWatcher();
-    watcher.start(filename, false, options.recursive);
-    watcher.on('change', listener);
-
-    return watcher;
-  };
-
-  // Deal with various approaches to node ID creation
-  function wrappedGuidFn(context) {
-    return function(callback) {
-      // Skip the duplicate ID check if asked to
-      if(_(flags).contains(FS_NODUPEIDCHECK)) {
-        callback(null, guid());
-        return;
-      }
-
-      // Otherwise (default) make sure this id is unused first
-      function guidWithCheck(callback) {
-        var id = guid();
-        context.getObject(id, function(err, value) {
-          if(err) {
-            callback(err);
-            return;
-          }
-
-          // If this id is unused, use it, otherwise find another
-          if(!value) {
-            callback(null, id);
-          } else {
-            guidWithCheck(callback);
-          }
-        });
-      }
-      guidWithCheck(callback);
-    };
-  }
-
-  // Let other instances (in this or other windows) know about
-  // any changes to this fs instance.
-  function broadcastChanges(changes) {
-    if(!changes.length) {
-      return;
-    }
-    var intercom = Intercom.getInstance();
-    changes.forEach(function(change) {
-      intercom.emit(change.event, change.path);
-    });
-  }
-
-  // Open file system storage provider
-  provider.open(function(err) {
-    function complete(error) {
-      function wrappedContext(methodName) {
-        var context = provider[methodName]();
-        context.flags = flags;
-        context.changes = [];
-        context.guid = wrappedGuidFn(context);
-
-        // When the context is finished, let the fs deal with any change events
-        context.close = function() {
-          var changes = context.changes;
-          broadcastChanges(changes);
-          changes.length = 0;
-        };
-
-        return context;
-      }
-
-      // Wrap the provider so we can extend the context with fs flags and
-      // an array of changes (e.g., watch event 'change' and 'rename' events
-      // for paths updated during the lifetime of the context). From this
-      // point forward we won't call open again, so it's safe to drop it.
-      fs.provider = {
-        openReadWriteContext: function() {
-          return wrappedContext('getReadWriteContext');
-        },
-        openReadOnlyContext: function() {
-          return wrappedContext('getReadOnlyContext');
-        }
-      };
-
-      if(error) {
-        fs.readyState = FS_ERROR;
-      } else {
-        fs.readyState = FS_READY;
-      }
-      runQueued();
-      callback(error, fs);
-    }
-
-    if(err) {
-      return complete(err);
-    }
-
-    var context = provider.getReadWriteContext();
-    context.guid = wrappedGuidFn(context);
-
-    // Mount the filesystem, formatting if necessary
-    if(forceFormatting) {
-      // Wipe the storage provider, then write root block
-      context.clear(function(err) {
-        if(err) {
-          return complete(err);
-        }
-        impl.ensureRootDirectory(context, complete);
-      });
-    } else {
-      // Use existing (or create new) root and mount
-      impl.ensureRootDirectory(context, complete);
-    }
-  });
-}
-
-// Expose storage providers on FileSystem constructor
-FileSystem.providers = providers;
-
-/**
- * Public API for FileSystem
- */
-[
-  'open',
-  'close',
-  'mknod',
-  'mkdir',
-  'rmdir',
-  'stat',
-  'fstat',
-  'link',
-  'unlink',
-  'read',
-  'readFile',
-  'write',
-  'writeFile',
-  'appendFile',
-  'exists',
-  'lseek',
-  'readdir',
-  'rename',
-  'readlink',
-  'symlink',
-  'lstat',
-  'truncate',
-  'ftruncate',
-  'utimes',
-  'futimes',
-  'setxattr',
-  'getxattr',
-  'fsetxattr',
-  'fgetxattr',
-  'removexattr',
-  'fremovexattr'
-].forEach(function(methodName) {
-  FileSystem.prototype[methodName] = function() {
-    var fs = this;
-    var args = Array.prototype.slice.call(arguments, 0);
-    var lastArgIndex = args.length - 1;
-
-    // We may or may not get a callback, and since node.js supports
-    // fire-and-forget style fs operations, we have to dance a bit here.
-    var missingCallback = typeof args[lastArgIndex] !== 'function';
-    var callback = maybeCallback(args[lastArgIndex]);
-
-    var error = fs.queueOrRun(function() {
-      var context = fs.provider.openReadWriteContext();
-
-      // Fail early if the filesystem is in an error state (e.g.,
-      // provider failed to open.
-      if(FS_ERROR === fs.readyState) {
-        var err = new Errors.EFILESYSTEMERROR('filesystem unavailable, operation canceled');
-        return callback.call(fs, err);
-      }
-
-      // Wrap the callback so we can explicitly close the context
-      function complete() {
-        context.close();
-        callback.apply(fs, arguments);
-      }
-
-      // Either add or replace the callback with our wrapper complete()
-      if(missingCallback) {
-        args.push(complete);
-      } else {
-        args[lastArgIndex] = complete;
-      }
-
-      // Forward this call to the impl's version, using the following
-      // call signature, with complete() as the callback/last-arg now:
-      // fn(fs, context, arg0, arg1, ... , complete);
-      var fnArgs = [fs, context].concat(args);
-      impl[methodName].apply(null, fnArgs);
-    });
-    if(error) {
-      callback(error);
-    }
-  };
-});
-
-module.exports = FileSystem;
-
-},{"../../lib/intercom.js":3,"../../lib/nodash.js":4,"../constants.js":21,"../errors.js":24,"../fs-watcher.js":27,"../path.js":31,"../providers/index.js":32,"../shared.js":36,"../shell/shell.js":38,"./implementation.js":25}],27:[function(require,module,exports){
-var EventEmitter = require('../lib/eventemitter.js');
-var Path = require('./path.js');
-var Intercom = require('../lib/intercom.js');
-
-/**
- * FSWatcher based on node.js' FSWatcher
- * see https://github.com/joyent/node/blob/master/lib/fs.js
- */
-function FSWatcher() {
-  EventEmitter.call(this);
-  var self = this;
-  var recursive = false;
-  var recursivePathPrefix;
-  var filename;
-
-  function onchange(path) {
-    // Watch for exact filename, or parent path when recursive is true.
-    if(filename === path || (recursive && path.indexOf(recursivePathPrefix) === 0)) {
-      self.trigger('change', 'change', path);
-    }
-  }
-
-  // We support, but ignore the second arg, which node.js uses.
-  self.start = function(filename_, persistent_, recursive_) {
-    // Bail if we've already started (and therefore have a filename);
-    if(filename) {
-      return;
-    }
-
-    if(Path.isNull(filename_)) {
-      throw new Error('Path must be a string without null bytes.');
-    }
-
-    // TODO: get realpath for symlinks on filename...
-
-    // Filer's Path.normalize strips trailing slashes, which we use here.
-    // See https://github.com/js-platform/filer/issues/105
-    filename = Path.normalize(filename_);
-
-    // Whether to watch beneath this path or not
-    recursive = recursive_ === true;
-    // If recursive, construct a path prefix portion for comparisons later
-    // (i.e., '/path' becomes '/path/' so we can search within a filename for the
-    // prefix). We also take care to allow for '/' on its own.
-    if(recursive) {
-      recursivePathPrefix = filename === '/' ? '/' : filename + '/';
-    }
-
-    var intercom = Intercom.getInstance();
-    intercom.on('change', onchange);
-  };
-
-  self.close = function() {
-    var intercom = Intercom.getInstance();
-    intercom.off('change', onchange);
-    self.removeAllListeners('change');
-  };
-}
-FSWatcher.prototype = new EventEmitter();
-FSWatcher.prototype.constructor = FSWatcher;
-
-module.exports = FSWatcher;
-
-},{"../lib/eventemitter.js":2,"../lib/intercom.js":3,"./path.js":31}],28:[function(require,module,exports){
-module.exports = {
-  FileSystem: require('./filesystem/interface.js'),
-  Buffer: require('./buffer.js'),
-  Path: require('./path.js'),
-  Errors: require('./errors.js'),
-  Shell: require('./shell/shell.js')
-};
-
-},{"./buffer.js":20,"./errors.js":24,"./filesystem/interface.js":26,"./path.js":31,"./shell/shell.js":38}],29:[function(require,module,exports){
-var path = require('./path.js');
-var hash32 = require('./encoding.js').hash32;
-
-var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;
-var NODE_TYPE_DIRECTORY = require('./constants.js').NODE_TYPE_DIRECTORY;
-var NODE_TYPE_SYMBOLIC_LINK = require('./constants.js').NODE_TYPE_SYMBOLIC_LINK;
-var NODE_TYPE_META = require('./constants.js').NODE_TYPE_META;
-
-var ROOT_DIRECTORY_NAME = require('./constants.js').ROOT_DIRECTORY_NAME;
-
-var S_IFREG = require('./constants.js').S_IFREG;
-var S_IFDIR = require('./constants.js').S_IFDIR;
-var S_IFLNK = require('./constants.js').S_IFLNK;
-
-var DEFAULT_FILE_PERMISSIONS = require('./constants.js').DEFAULT_FILE_PERMISSIONS;
-var DEFAULT_DIR_PERMISSIONS = require('./constants.js').DEFAULT_DIR_PERMISSIONS;
-
-function getMode(type) {
-  switch(type) {
-    case NODE_TYPE_DIRECTORY:
-      return DEFAULT_DIR_PERMISSIONS | S_IFDIR;
-    case NODE_TYPE_SYMBOLIC_LINK:
-      return DEFAULT_FILE_PERMISSIONS | S_IFLNK;
-    /* jshint -W086 */
-    case NODE_TYPE_FILE:
-      // falls through
-    default:
-      return DEFAULT_FILE_PERMISSIONS | S_IFREG;
-  }
-}
-
-function Node(options) {
-  var now = Date.now();
-
-  this.id = options.id;
-  this.type = options.type || NODE_TYPE_FILE;  // node type (file, directory, etc)
-  this.size = options.size || 0; // size (bytes for files, entries for directories)
-  this.atime = options.atime || now; // access time (will mirror ctime after creation)
-  this.ctime = options.ctime || now; // creation/change time
-  this.mtime = options.mtime || now; // modified time
-  this.flags = options.flags || []; // file flags
-  this.xattrs = options.xattrs || {}; // extended attributes
-  this.nlinks = options.nlinks || 0; // links count
-  this.data = options.data; // id for data object
-  this.version = options.version || 1;
-
-  // permissions and flags
-  this.mode = options.mode || (getMode(this.type));
-  this.uid = options.uid || 0x0; // owner name
-  this.gid = options.gid || 0x0; // group name
-}
-
-// Make sure the options object has an id on property,
-// either from caller or one we generate using supplied guid fn.
-function ensureID(options, prop, callback) {
-  if(options[prop]) {
-    callback(null);
-  } else {
-    options.guid(function(err, id) {
-      options[prop] = id;
-      callback(err);
-    });
-  }
-}
-
-Node.create = function(options, callback) {
-  // We expect both options.id and options.data to be provided/generated.
-  ensureID(options, 'id', function(err) {
-    if(err) {
-      callback(err);
-      return;
-    }
-
-    ensureID(options, 'data', function(err) {
-      if(err) {
-        callback(err);
-        return;
-      }
-
-      callback(null, new Node(options));
-    });
-  });
-};
-
-module.exports = Node;
-
-},{"./constants.js":21,"./encoding.js":23,"./path.js":31}],30:[function(require,module,exports){
-var Errors = require('./errors.js');
-
-function OpenFileDescription(path, id, flags, position) {
-  this.path = path;
-  this.id = id;
-  this.flags = flags;
-  this.position = position;
-}
-
-// Tries to find the node associated with an ofd's `id`.
-// If not found, an error is returned on the callback.
-OpenFileDescription.prototype.getNode = function(context, callback) {
-  var id = this.id;
-  var path = this.path;
-
-  function check_if_node_exists(error, node) {
-    if(error) {
-      return callback(error);
-    }
-
-    if(!node) {
-      return callback(new Errors.EBADF('file descriptor refers to unknown node', path));
-    }
-
-    callback(null, node);
-  }
-
-  context.getObject(id, check_if_node_exists);
-};
-
-module.exports = OpenFileDescription;
-
-},{"./errors.js":24}],31:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-// Based on https://github.com/joyent/node/blob/41e53e557992a7d552a8e23de035f9463da25c99/lib/path.js
-
-// resolves . and .. elements in a path array with directory names there
-// must be no slashes, empty elements, or device names (c:\) in the array
-// (so also no leading and trailing slashes - it does not distinguish
-// relative and absolute paths)
-function normalizeArray(parts, allowAboveRoot) {
-  // if the path tries to go above the root, `up` ends up > 0
-  var up = 0;
-  for (var i = parts.length - 1; i >= 0; i--) {
-    var last = parts[i];
-    if (last === '.') {
-      parts.splice(i, 1);
-    } else if (last === '..') {
-      parts.splice(i, 1);
-      up++;
-    } else if (up) {
-      parts.splice(i, 1);
-      up--;
-    }
-  }
-
-  // if the path is allowed to go above the root, restore leading ..s
-  if (allowAboveRoot) {
-    for (; up--; up) {
-      parts.unshift('..');
-    }
-  }
-
-  return parts;
-}
-
-// Split a filename into [root, dir, basename, ext], unix version
-// 'root' is just a slash, or nothing.
-var splitPathRe =
-      /^(\/?)([\s\S]+\/(?!$)|\/)?((?:\.{1,2}$|[\s\S]+?)?(\.[^.\/]*)?)$/;
-var splitPath = function(filename) {
-  var result = splitPathRe.exec(filename);
-  return [result[1] || '', result[2] || '', result[3] || '', result[4] || ''];
-};
-
-// path.resolve([from ...], to)
-function resolve() {
-  var resolvedPath = '',
-      resolvedAbsolute = false;
-
-  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
-    // XXXfiler: we don't have process.cwd() so we use '/' as a fallback
-    var path = (i >= 0) ? arguments[i] : '/';
-
-    // Skip empty and invalid entries
-    if (typeof path !== 'string' || !path) {
-      continue;
-    }
-
-    resolvedPath = path + '/' + resolvedPath;
-    resolvedAbsolute = path.charAt(0) === '/';
-  }
-
-  // At this point the path should be resolved to a full absolute path, but
-  // handle relative paths to be safe (might happen when process.cwd() fails)
-
-  // Normalize the path
-  resolvedPath = normalizeArray(resolvedPath.split('/').filter(function(p) {
-    return !!p;
-  }), !resolvedAbsolute).join('/');
-
-  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
-}
-
-// path.normalize(path)
-function normalize(path) {
-  var isAbsolute = path.charAt(0) === '/',
-      trailingSlash = path.substr(-1) === '/';
-
-  // Normalize the path
-  path = normalizeArray(path.split('/').filter(function(p) {
-    return !!p;
-  }), !isAbsolute).join('/');
-
-  if (!path && !isAbsolute) {
-    path = '.';
-  }
-  /*
-   if (path && trailingSlash) {
-   path += '/';
-   }
-   */
-
-  return (isAbsolute ? '/' : '') + path;
-}
-
-function join() {
-  var paths = Array.prototype.slice.call(arguments, 0);
-  return normalize(paths.filter(function(p, index) {
-    return p && typeof p === 'string';
-  }).join('/'));
-}
-
-// path.relative(from, to)
-function relative(from, to) {
-  from = resolve(from).substr(1);
-  to = resolve(to).substr(1);
-
-  function trim(arr) {
-    var start = 0;
-    for (; start < arr.length; start++) {
-      if (arr[start] !== '') break;
-    }
-
-    var end = arr.length - 1;
-    for (; end >= 0; end--) {
-      if (arr[end] !== '') break;
-    }
-
-    if (start > end) return [];
-    return arr.slice(start, end - start + 1);
-  }
-
-  var fromParts = trim(from.split('/'));
-  var toParts = trim(to.split('/'));
-
-  var length = Math.min(fromParts.length, toParts.length);
-  var samePartsLength = length;
-  for (var i = 0; i < length; i++) {
-    if (fromParts[i] !== toParts[i]) {
-      samePartsLength = i;
-      break;
-    }
-  }
-
-  var outputParts = [];
-  for (var i = samePartsLength; i < fromParts.length; i++) {
-    outputParts.push('..');
-  }
-
-  outputParts = outputParts.concat(toParts.slice(samePartsLength));
-
-  return outputParts.join('/');
-}
-
-function dirname(path) {
-  var result = splitPath(path),
-      root = result[0],
-      dir = result[1];
-
-  if (!root && !dir) {
-    // No dirname whatsoever
-    return '.';
-  }
-
-  if (dir) {
-    // It has a dirname, strip trailing slash
-    dir = dir.substr(0, dir.length - 1);
-  }
-
-  return root + dir;
-}
-
-function basename(path, ext) {
-  var f = splitPath(path)[2];
-  // TODO: make this comparison case-insensitive on windows?
-  if (ext && f.substr(-1 * ext.length) === ext) {
-    f = f.substr(0, f.length - ext.length);
-  }
-  // XXXfiler: node.js just does `return f`
-  return f === "" ? "/" : f;
-}
-
-function extname(path) {
-  return splitPath(path)[3];
-}
-
-function isAbsolute(path) {
-  if(path.charAt(0) === '/') {
-    return true;
-  }
-  return false;
-}
-
-function isNull(path) {
-  if (('' + path).indexOf('\u0000') !== -1) {
-    return true;
-  }
-  return false;
-}
-
-// Make sure we don't double-add a trailing slash (e.g., '/' -> '//')
-function addTrailing(path) {
-  return path.replace(/\/*$/, '/');
-}
-
-// Deal with multiple slashes at the end, one, or none
-// and make sure we don't return the empty string.
-function removeTrailing(path) {
-  path = path.replace(/\/*$/, '');
-  return path === '' ? '/' : path;
-}
-
-// XXXfiler: we don't support path.exists() or path.existsSync(), which
-// are deprecated, and need a FileSystem instance to work. Use fs.stat().
-
-module.exports = {
-  normalize: normalize,
-  resolve: resolve,
-  join: join,
-  relative: relative,
-  sep: '/',
-  delimiter: ':',
-  dirname: dirname,
-  basename: basename,
-  extname: extname,
-  isAbsolute: isAbsolute,
-  isNull: isNull,
-  // Non-node but useful...
-  addTrailing: addTrailing,
-  removeTrailing: removeTrailing
-};
-
-},{}],32:[function(require,module,exports){
-var IndexedDB = require('./indexeddb.js');
-var WebSQL = require('./websql.js');
-var Memory = require('./memory.js');
-
-module.exports = {
-  IndexedDB: IndexedDB,
-  WebSQL: WebSQL,
-  Memory: Memory,
-
-  /**
-   * Convenience Provider references
-   */
-
-  // The default provider to use when none is specified
-  Default: IndexedDB,
-
-  // The Fallback provider does automatic fallback checks
-  Fallback: (function() {
-    if(IndexedDB.isSupported()) {
-      return IndexedDB;
-    }
-
-    if(WebSQL.isSupported()) {
-      return WebSQL;
-    }
-
-    function NotSupported() {
-      throw "[Filer Error] Your browser doesn't support IndexedDB or WebSQL.";
-    }
-    NotSupported.isSupported = function() {
-      return false;
-    };
-    return NotSupported;
-  }())
-};
-
-},{"./indexeddb.js":33,"./memory.js":34,"./websql.js":35}],33:[function(require,module,exports){
-(function (global,Buffer){
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-var FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;
-var IDB_RW = require('../constants.js').IDB_RW;
-var IDB_RO = require('../constants.js').IDB_RO;
-var Errors = require('../errors.js');
-var FilerBuffer = require('../buffer.js');
-
-var indexedDB = global.indexedDB       ||
-                global.mozIndexedDB    ||
-                global.webkitIndexedDB ||
-                global.msIndexedDB;
-
-function IndexedDBContext(db, mode) {
-  this.db = db;
-  this.mode = mode;
-}
-
-IndexedDBContext.prototype._getObjectStore = function() {
-  if(this.objectStore) {
-    return this.objectStore;
-  }
-
-  var transaction = this.db.transaction(FILE_STORE_NAME, this.mode);
-  this.objectStore = transaction.objectStore(FILE_STORE_NAME);
-  return this.objectStore;
-};
-
-IndexedDBContext.prototype.clear = function(callback) {
-  try {
-    var objectStore = this._getObjectStore();
-    var request = objectStore.clear();
-    request.onsuccess = function() {
-      callback();
-    };
-    request.onerror = function(event) {
-      event.preventDefault();
-      callback(event.error);
-    };
-  } catch(err) {
-    callback(err);
-  }
-};
-
-IndexedDBContext.prototype._get = function(key, callback) {
-  try {
-    var objectStore = this._getObjectStore();
-    var request = objectStore.get(key);
-    request.onsuccess = function onsuccess(event) {
-      var result = event.target.result;
-      callback(null, result);
-    };
-    request.onerror = function(event) {
-      event.preventDefault();
-      callback(event.error);
-    };
-  } catch(err) {
-    callback(err);
-  }
-};
-IndexedDBContext.prototype.getObject = function(key, callback) {
-  this._get(key, callback);
-};
-IndexedDBContext.prototype.getBuffer = function(key, callback) {
-  this._get(key, function(err, arrayBuffer) {
-    if(err) {
-      return callback(err);
-    }
-    callback(null, new FilerBuffer(arrayBuffer));
-  });
-};
-
-IndexedDBContext.prototype._put = function(key, value, callback) {
-  try {
-    var objectStore = this._getObjectStore();
-    var request = objectStore.put(value, key);
-    request.onsuccess = function onsuccess(event) {
-      var result = event.target.result;
-      callback(null, result);
-    };
-    request.onerror = function(event) {
-      event.preventDefault();
-      callback(event.error);
-    };
-  } catch(err) {
-    callback(err);
-  }
-};
-IndexedDBContext.prototype.putObject = function(key, value, callback) {
-  this._put(key, value, callback);
-};
-IndexedDBContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {
-  var buf;
-  if(!Buffer._useTypedArrays) { // workaround for fxos 1.3
-    buf = uint8BackedBuffer.toArrayBuffer();
-  } else {
-    buf = uint8BackedBuffer.buffer;
-  }
-  this._put(key, buf, callback);
-};
-
-IndexedDBContext.prototype.delete = function(key, callback) {
-  try {
-    var objectStore = this._getObjectStore();
-    var request = objectStore.delete(key);
-    request.onsuccess = function onsuccess(event) {
-      var result = event.target.result;
-      callback(null, result);
-    };
-    request.onerror = function(event) {
-      event.preventDefault();
-      callback(event.error);
-    };
-  } catch(err) {
-    callback(err);
-  }
-};
-
-
-function IndexedDB(name) {
-  this.name = name || FILE_SYSTEM_NAME;
-  this.db = null;
-}
-IndexedDB.isSupported = function() {
-  return !!indexedDB;
-};
-
-IndexedDB.prototype.open = function(callback) {
-  var that = this;
-
-  // Bail if we already have a db open
-  if(that.db) {
-    return callback();
-  }
-
-  try {
-    // NOTE: we're not using versioned databases.
-    var openRequest = indexedDB.open(that.name);
-
-    // If the db doesn't exist, we'll create it
-    openRequest.onupgradeneeded = function onupgradeneeded(event) {
-      var db = event.target.result;
-
-      if(db.objectStoreNames.contains(FILE_STORE_NAME)) {
-        db.deleteObjectStore(FILE_STORE_NAME);
-      }
-      db.createObjectStore(FILE_STORE_NAME);
-    };
-
-    openRequest.onsuccess = function onsuccess(event) {
-      that.db = event.target.result;
-      callback();
-    };
-    openRequest.onerror = function onerror(event) {
-      event.preventDefault();
-      callback(event.error);
-    };
-  } catch(err) {
-    callback(err);
-  }
-};
-
-IndexedDB.prototype.getReadOnlyContext = function() {
-  return new IndexedDBContext(this.db, IDB_RO);
-};
-IndexedDB.prototype.getReadWriteContext = function() {
-  return new IndexedDBContext(this.db, IDB_RW);
-};
-
-module.exports = IndexedDB;
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
-},{"../buffer.js":20,"../constants.js":21,"../errors.js":24,"buffer":7}],34:[function(require,module,exports){
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-// NOTE: prefer setImmediate to nextTick for proper recursion yielding.
-// see https://github.com/js-platform/filer/pull/24
-var asyncCallback = require('../../lib/async.js').setImmediate;
-
-/**
- * Make shared in-memory DBs possible when using the same name.
- */
-var createDB = (function() {
-  var pool = {};
-  return function getOrCreate(name) {
-    if(!pool.hasOwnProperty(name)) {
-      pool[name] = {};
-    }
-    return pool[name];
-  };
-}());
-
-function MemoryContext(db, readOnly) {
-  this.readOnly = readOnly;
-  this.objectStore = db;
-}
-
-MemoryContext.prototype.clear = function(callback) {
-  if(this.readOnly) {
-    asyncCallback(function() {
-      callback("[MemoryContext] Error: write operation on read only context");
-    });
-    return;
-  }
-  var objectStore = this.objectStore;
-  Object.keys(objectStore).forEach(function(key){
-    delete objectStore[key];
-  });
-  asyncCallback(callback);
-};
-
-// Memory context doesn't care about differences between Object and Buffer
-MemoryContext.prototype.getObject =
-MemoryContext.prototype.getBuffer =
-function(key, callback) {
-  var that = this;
-  asyncCallback(function() {
-    callback(null, that.objectStore[key]);
-  });
-};
-MemoryContext.prototype.putObject =
-MemoryContext.prototype.putBuffer =
-function(key, value, callback) {
-  if(this.readOnly) {
-    asyncCallback(function() {
-      callback("[MemoryContext] Error: write operation on read only context");
-    });
-    return;
-  }
-  this.objectStore[key] = value;
-  asyncCallback(callback);
-};
-
-MemoryContext.prototype.delete = function(key, callback) {
-  if(this.readOnly) {
-    asyncCallback(function() {
-      callback("[MemoryContext] Error: write operation on read only context");
-    });
-    return;
-  }
-  delete this.objectStore[key];
-  asyncCallback(callback);
-};
-
-
-function Memory(name) {
-  this.name = name || FILE_SYSTEM_NAME;
-}
-Memory.isSupported = function() {
-  return true;
-};
-
-Memory.prototype.open = function(callback) {
-  this.db = createDB(this.name);
-  asyncCallback(callback);
-};
-Memory.prototype.getReadOnlyContext = function() {
-  return new MemoryContext(this.db, true);
-};
-Memory.prototype.getReadWriteContext = function() {
-  return new MemoryContext(this.db, false);
-};
-
-module.exports = Memory;
-
-},{"../../lib/async.js":1,"../constants.js":21}],35:[function(require,module,exports){
-(function (global){
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-var FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;
-var WSQL_VERSION = require('../constants.js').WSQL_VERSION;
-var WSQL_SIZE = require('../constants.js').WSQL_SIZE;
-var WSQL_DESC = require('../constants.js').WSQL_DESC;
-var Errors = require('../errors.js');
-var FilerBuffer = require('../buffer.js');
-var base64ArrayBuffer = require('base64-arraybuffer');
-
-function WebSQLContext(db, isReadOnly) {
-  var that = this;
-  this.getTransaction = function(callback) {
-    if(that.transaction) {
-      callback(that.transaction);
-      return;
-    }
-    // Either do readTransaction() (read-only) or transaction() (read/write)
-    db[isReadOnly ? 'readTransaction' : 'transaction'](function(transaction) {
-      that.transaction = transaction;
-      callback(transaction);
-    });
-  };
-}
-
-WebSQLContext.prototype.clear = function(callback) {
-  function onError(transaction, error) {
-    callback(error);
-  }
-  function onSuccess(transaction, result) {
-    callback(null);
-  }
-  this.getTransaction(function(transaction) {
-    transaction.executeSql("DELETE FROM " + FILE_STORE_NAME + ";",
-                           [], onSuccess, onError);
-  });
-};
-
-function _get(getTransaction, key, callback) {
-  function onSuccess(transaction, result) {
-    // If the key isn't found, return null
-    var value = result.rows.length === 0 ? null : result.rows.item(0).data;
-    callback(null, value);
-  }
-  function onError(transaction, error) {
-    callback(error);
-  }
-  getTransaction(function(transaction) {
-    transaction.executeSql("SELECT data FROM " + FILE_STORE_NAME + " WHERE id = ? LIMIT 1;",
-                           [key], onSuccess, onError);
-  });
-}
-WebSQLContext.prototype.getObject = function(key, callback) {
-  _get(this.getTransaction, key, function(err, result) {
-    if(err) {
-      return callback(err);
-    }
-
-    try {
-      if(result) {
-        result = JSON.parse(result);
-      }
-    } catch(e) {
-      return callback(e);
-    }
-
-    callback(null, result);
-  });
-};
-WebSQLContext.prototype.getBuffer = function(key, callback) {
-  _get(this.getTransaction, key, function(err, result) {
-    if(err) {
-      return callback(err);
-    }
-
-    // Deal with zero-length ArrayBuffers, which will be encoded as ''
-    if(result || result === '') {
-      var arrayBuffer = base64ArrayBuffer.decode(result);
-      result = new FilerBuffer(arrayBuffer);
-    }
-
-    callback(null, result);
-  });
-};
-
-function _put(getTransaction, key, value, callback) {
-  function onSuccess(transaction, result) {
-    callback(null);
-  }
-  function onError(transaction, error) {
-    callback(error);
-  }
-  getTransaction(function(transaction) {
-    transaction.executeSql("INSERT OR REPLACE INTO " + FILE_STORE_NAME + " (id, data) VALUES (?, ?);",
-                           [key, value], onSuccess, onError);
-  });
-}
-WebSQLContext.prototype.putObject = function(key, value, callback) {
-  var json = JSON.stringify(value);
-  _put(this.getTransaction, key, json, callback);
-};
-WebSQLContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {
-  var base64 = base64ArrayBuffer.encode(uint8BackedBuffer.buffer);
-  _put(this.getTransaction, key, base64, callback);
-};
-
-WebSQLContext.prototype.delete = function(key, callback) {
-  function onSuccess(transaction, result) {
-    callback(null);
-  }
-  function onError(transaction, error) {
-    callback(error);
-  }
-  this.getTransaction(function(transaction) {
-    transaction.executeSql("DELETE FROM " + FILE_STORE_NAME + " WHERE id = ?;",
-                           [key], onSuccess, onError);
-  });
-};
-
-
-function WebSQL(name) {
-  this.name = name || FILE_SYSTEM_NAME;
-  this.db = null;
-}
-WebSQL.isSupported = function() {
-  return !!global.openDatabase;
-};
-
-WebSQL.prototype.open = function(callback) {
-  var that = this;
-
-  // Bail if we already have a db open
-  if(that.db) {
-    return callback();
-  }
-
-  var db = global.openDatabase(that.name, WSQL_VERSION, WSQL_DESC, WSQL_SIZE);
-  if(!db) {
-    callback("[WebSQL] Unable to open database.");
-    return;
-  }
-
-  function onError(transaction, error) {
-    if (error.code === 5) {
-      callback(new Errors.EINVAL('WebSQL cannot be accessed. If private browsing is enabled, disable it.'));
-    }
-    callback(error);
-  }
-  function onSuccess(transaction, result) {
-    that.db = db;
-    callback();
-  }
-
-  // Create the table and index we'll need to store the fs data.
-  db.transaction(function(transaction) {
-    function createIndex(transaction) {
-      transaction.executeSql("CREATE INDEX IF NOT EXISTS idx_" + FILE_STORE_NAME + "_id" +
-                             " on " + FILE_STORE_NAME + " (id);",
-                             [], onSuccess, onError);
-    }
-    transaction.executeSql("CREATE TABLE IF NOT EXISTS " + FILE_STORE_NAME + " (id unique, data TEXT);",
-                           [], createIndex, onError);
-  });
-};
-WebSQL.prototype.getReadOnlyContext = function() {
-  return new WebSQLContext(this.db, true);
-};
-WebSQL.prototype.getReadWriteContext = function() {
-  return new WebSQLContext(this.db, false);
-};
-
-module.exports = WebSQL;
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../buffer.js":20,"../constants.js":21,"../errors.js":24,"base64-arraybuffer":5}],36:[function(require,module,exports){
-function guid() {
-  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
-    var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
-    return v.toString(16);
-  }).toUpperCase();
-}
-
-function nop() {}
-
-/**
- * Convert a Uint8Array to a regular array
- */
-function u8toArray(u8) {
-  var array = [];
-  var len = u8.length;
-  for(var i = 0; i < len; i++) {
-    array[i] = u8[i];
-  }
-  return array;
-}
-
-module.exports = {
-  guid: guid,
-  u8toArray: u8toArray,
-  nop: nop
-};
-
-},{}],37:[function(require,module,exports){
-var defaults = require('../constants.js').ENVIRONMENT;
-
-module.exports = function Environment(env) {
-  env = env || {};
-  env.TMP = env.TMP || defaults.TMP;
-  env.PATH = env.PATH || defaults.PATH;
-
-  this.get = function(name) {
-    return env[name];
-  };
-
-  this.set = function(name, value) {
-    env[name] = value;
-  };
-};
-
-},{"../constants.js":21}],38:[function(require,module,exports){
-var Path = require('../path.js');
-var Errors = require('../errors.js');
-var Environment = require('./environment.js');
-var async = require('../../lib/async.js');
-var Encoding = require('../encoding.js');
-var minimatch = require('minimatch');
-
-function Shell(fs, options) {
-  options = options || {};
-
-  var env = new Environment(options.env);
-  var cwd = '/';
-
-  /**
-   * The bound FileSystem (cannot be changed)
-   */
-  Object.defineProperty(this, 'fs', {
-    get: function() { return fs; },
-    enumerable: true
-  });
-
-  /**
-   * The shell's environment (e.g., for things like
-   * path, tmp, and other env vars). Use env.get()
-   * and env.set() to work with variables.
-   */
-  Object.defineProperty(this, 'env', {
-    get: function() { return env; },
-    enumerable: true
-  });
-
-  /**
-   * Change the current working directory. We
-   * include `cd` on the `this` vs. proto so that
-   * we can access cwd without exposing it externally.
-   */
-  this.cd = function(path, callback) {
-    path = Path.resolve(cwd, path);
-    // Make sure the path actually exists, and is a dir
-    fs.stat(path, function(err, stats) {
-      if(err) {
-        callback(new Errors.ENOTDIR(null, path));
-        return;
-      }
-      if(stats.type === 'DIRECTORY') {
-        cwd = path;
-        callback();
-      } else {
-        callback(new Errors.ENOTDIR(null, path));
-      }
-    });
-  };
-
-  /**
-   * Get the current working directory (changed with `cd()`)
-   */
-  this.pwd = function() {
-    return cwd;
-  };
-}
-
-/**
- * Execute the .js command located at `path`. Such commands
- * should assume the existence of 3 arguments, which will be
- * defined at runtime:
- *
- *   * fs - the current shell's bound filesystem object
- *   * args - a list of arguments for the command, or an empty list if none
- *   * callback - a callback function(error, result) to call when done.
- *
- * The .js command's contents should be the body of a function
- * that looks like this:
- *
- * function(fs, args, callback) {
- *   // .js code here
- * }
- */
-Shell.prototype.exec = function(path, args, callback) {
-  /* jshint evil:true */
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof args === 'function') {
-    callback = args;
-    args = [];
-  }
-  args = args || [];
-  callback = callback || function(){};
-  path = Path.resolve(sh.pwd(), path);
-
-  fs.readFile(path, "utf8", function(error, data) {
-    if(error) {
-      callback(error);
-      return;
-    }
-    try {
-      var cmd = new Function('fs', 'args', 'callback', data);
-      cmd(fs, args, callback);
-    } catch(e) {
-      callback(e);
-    }
-  });
-};
-
-/**
- * Create a file if it does not exist, or update access and
- * modified times if it does. Valid options include:
- *
- *  * updateOnly - whether to create the file if missing (defaults to false)
- *  * date - use the provided Date value instead of current date/time
- */
-Shell.prototype.touch = function(path, options, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof options === 'function') {
-    callback = options;
-    options = {};
-  }
-  options = options || {};
-  callback = callback || function(){};
-  path = Path.resolve(sh.pwd(), path);
-
-  function createFile(path) {
-    fs.writeFile(path, '', callback);
-  }
-
-  function updateTimes(path) {
-    var now = Date.now();
-    var atime = options.date || now;
-    var mtime = options.date || now;
-
-    fs.utimes(path, atime, mtime, callback);
-  }
-
-  fs.stat(path, function(error, stats) {
-    if(error) {
-      if(options.updateOnly === true) {
-        callback();
-      } else {
-        createFile(path);
-      }
-    } else {
-      updateTimes(path);
-    }
-  });
-};
-
-/**
- * Concatenate multiple files into a single String, with each
- * file separated by a newline. The `files` argument should
- * be a String (path to single file) or an Array of Strings
- * (multiple file paths).
- */
-Shell.prototype.cat = function(files, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  var all = '';
-  callback = callback || function(){};
-
-  if(!files) {
-    callback(new Errors.EINVAL('Missing files argument'));
-    return;
-  }
-
-  files = typeof files === 'string' ? [ files ] : files;
-
-  function append(item, callback) {
-    var filename = Path.resolve(sh.pwd(), item);
-    fs.readFile(filename, 'utf8', function(error, data) {
-      if(error) {
-        callback(error);
-        return;
-      }
-      all += data + '\n';
-      callback();
-    });
-  }
-
-  async.eachSeries(files, append, function(error) {
-    if(error) {
-      callback(error);
-    } else {
-      callback(null, all.replace(/\n$/, ''));
-    }
-  });
-};
-
-/**
- * Get the listing of a directory, returning an array of
- * file entries in the following form:
- *
- * {
- *   path: <String> the basename of the directory entry
- *   links: <Number> the number of links to the entry
- *   size: <Number> the size in bytes of the entry
- *   modified: <Number> the last modified date/time
- *   type: <String> the type of the entry
- *   contents: <Array> an optional array of child entries
- * }
- *
- * By default ls() gives a shallow listing. If you want
- * to follow directories as they are encountered, use
- * the `recursive=true` option.
- */
-Shell.prototype.ls = function(dir, options, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof options === 'function') {
-    callback = options;
-    options = {};
-  }
-  options = options || {};
-  callback = callback || function(){};
-
-  if(!dir) {
-    callback(new Errors.EINVAL('Missing dir argument'));
-    return;
-  }
-
-  function list(path, callback) {
-    var pathname = Path.resolve(sh.pwd(), path);
-    var result = [];
-
-    fs.readdir(pathname, function(error, entries) {
-      if(error) {
-        callback(error);
-        return;
-      }
-
-      function getDirEntry(name, callback) {
-        name = Path.join(pathname, name);
-        fs.stat(name, function(error, stats) {
-          if(error) {
-            callback(error);
-            return;
-          }
-          var entry = stats;
-
-          if(options.recursive && stats.type === 'DIRECTORY') {
-            list(Path.join(pathname, entry.name), function(error, items) {
-              if(error) {
-                callback(error);
-                return;
-              }
-              entry.contents = items;
-              result.push(entry);
-              callback();
-            });
-          } else {
-            result.push(entry);
-            callback();
-          }
-        });
-      }
-
-      async.eachSeries(entries, getDirEntry, function(error) {
-        callback(error, result);
-      });
-    });
-  }
-
-  list(dir, callback);
-};
-
-/**
- * Removes the file or directory at `path`. If `path` is a file
- * it will be removed. If `path` is a directory, it will be
- * removed if it is empty, otherwise the callback will receive
- * an error. In order to remove non-empty directories, use the
- * `recursive=true` option.
- */
-Shell.prototype.rm = function(path, options, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof options === 'function') {
-    callback = options;
-    options = {};
-  }
-  options = options || {};
-  callback = callback || function(){};
-
-  if(!path) {
-    callback(new Errors.EINVAL('Missing path argument'));
-    return;
-  }
-
-  function remove(pathname, callback) {
-    pathname = Path.resolve(sh.pwd(), pathname);
-    fs.stat(pathname, function(error, stats) {
-      if(error) {
-        callback(error);
-        return;
-      }
-
-      // If this is a file, delete it and we're done
-      if(stats.type === 'FILE') {
-        fs.unlink(pathname, callback);
-        return;
-      }
-
-      // If it's a dir, check if it's empty
-      fs.readdir(pathname, function(error, entries) {
-        if(error) {
-          callback(error);
-          return;
-        }
-
-        // If dir is empty, delete it and we're done
-        if(entries.length === 0) {
-          fs.rmdir(pathname, callback);
-          return;
-        }
-
-        // If not, see if we're allowed to delete recursively
-        if(!options.recursive) {
-          callback(new Errors.ENOTEMPTY(null, pathname));
-          return;
-        }
-
-        // Remove each dir entry recursively, then delete the dir.
-        entries = entries.map(function(filename) {
-          // Root dir entries absolutely
-          return Path.join(pathname, filename);
-        });
-        async.eachSeries(entries, remove, function(error) {
-          if(error) {
-            callback(error);
-            return;
-          }
-          fs.rmdir(pathname, callback);
-        });
-      });
-    });
-  }
-
-  remove(path, callback);
-};
-
-/**
- * Gets the path to the temporary directory, creating it if not
- * present. The directory used is the one specified in
- * env.TMP. The callback receives (error, tempDirName).
- */
-Shell.prototype.tempDir = function(callback) {
-  var sh = this;
-  var fs = sh.fs;
-  var tmp = sh.env.get('TMP');
-  callback = callback || function(){};
-
-  // Try and create it, and it will either work or fail
-  // but either way it's now there.
-  fs.mkdir(tmp, function(err) {
-    callback(null, tmp);
-  });
-};
-
-/**
- * Recursively creates the directory at `path`. If the parent
- * of `path` does not exist, it will be created.
- * Based off EnsureDir by Sam X. Xu
- * https://www.npmjs.org/package/ensureDir
- * MIT License
- */
-Shell.prototype.mkdirp = function(path, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  callback = callback || function(){};
-
-  if(!path) {
-    callback(new Errors.EINVAL('Missing path argument'));
-    return;
-  }
-  else if (path === '/') {
-    callback();
-    return;
-  }
-  function _mkdirp(path, callback) {
-    fs.stat(path, function (err, stat) {
-      if(stat) {
-        if(stat.isDirectory()) {
-          callback();
-          return;
-        }
-        else if (stat.isFile()) {
-          callback(new Errors.ENOTDIR(null, path));
-          return;
-        }
-      }
-      else if (err && err.code !== 'ENOENT') {
-        callback(err);
-        return;
-      }
-      else {
-        var parent = Path.dirname(path);
-        if(parent === '/') {
-          fs.mkdir(path, function (err) {
-            if (err && err.code != 'EEXIST') {
-              callback(err);
-              return;
-            }
-            callback();
-            return;
-          });
-        }
-        else {
-          _mkdirp(parent, function (err) {
-            if (err) return callback(err);
-            fs.mkdir(path, function (err) {
-              if (err && err.code != 'EEXIST') {
-                callback(err);
-                return;
-              }
-              callback();
-              return;
-            });
-          });
-        }
-      }
-    });
-  }
-
-  _mkdirp(path, callback);
-};
-
-/**
- * Recursively walk a directory tree, reporting back all paths
- * that were found along the way. The `path` must be a dir.
- * Valid options include a `regex` for pattern matching paths
- * and an `exec` function of the form `function(path, next)` where
- * `path` is the current path that was found (dir paths have an '/'
- * appended) and `next` is a callback to call when done processing
- * the current path, passing any error object back as the first argument.
- * `find` returns a flat array of absolute paths for all matching/found
- * paths as the final argument to the callback.
- */
- Shell.prototype.find = function(path, options, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof options === 'function') {
-    callback = options;
-    options = {};
-  }
-  options = options || {};
-  callback = callback || function(){};
-
-  var exec = options.exec || function(path, next) { next(); };
-  var found = [];
-
-  if(!path) {
-    callback(new Errors.EINVAL('Missing path argument'));
-    return;
-  }
-
-  function processPath(path, callback) {
-    exec(path, function(err) {
-      if(err) {
-        callback(err);
-        return;
-      }
-
-      found.push(path);
-      callback();
-    });
-  }
-
-  function maybeProcessPath(path, callback) {
-    // Test the path against the user's regex, name, path primaries (if any)
-    // and remove any trailing slashes added previously.
-    var rawPath = Path.removeTrailing(path);
-
-    // Check entire path against provided regex, if any
-    if(options.regex && !options.regex.test(rawPath)) {
-      callback();
-      return;
-    }
-
-    // Check basename for matches against name primary, if any
-    if(options.name && !minimatch(Path.basename(rawPath), options.name)) {
-      callback();
-      return;
-    }
-
-    // Check dirname for matches against path primary, if any
-    if(options.path && !minimatch(Path.dirname(rawPath), options.path)) {
-      callback();
-      return;
-    }
-
-    processPath(path, callback);
-  }
-
-  function walk(path, callback) {
-    path = Path.resolve(sh.pwd(), path);
-
-    // The path is either a file or dir, and instead of doing
-    // a stat() to determine it first, we just try to readdir()
-    // and it will either work or not, and we handle the non-dir error.
-    fs.readdir(path, function(err, entries) {
-      if(err) {
-        if(err.code === 'ENOTDIR' /* file case, ignore error */) {
-          maybeProcessPath(path, callback);
-        } else {
-          callback(err);
-        }
-        return;
-      }
-
-      // Path is really a dir, add a trailing / and report it found
-      maybeProcessPath(Path.addTrailing(path), function(err) {
-        if(err) {
-          callback(err);
-          return;
-        }
-
-        entries = entries.map(function(entry) {
-          return Path.join(path, entry);
-        });
-
-        async.eachSeries(entries, walk, function(err) {
-          callback(err, found);
-        });
-      });
-    });
-  }
-
-  // Make sure we are starting with a dir path
-  fs.stat(path, function(err, stats) {
-    if(err) {
-      callback(err);
-      return;
-    }
-    if(!stats.isDirectory()) {
-      callback(new Errors.ENOTDIR(null, path));
-      return;
-    }
-
-    walk(path, callback);
-  });
-};
-
-module.exports = Shell;
-
-},{"../../lib/async.js":1,"../encoding.js":23,"../errors.js":24,"../path.js":31,"./environment.js":37,"minimatch":11}],39:[function(require,module,exports){
-var Constants = require('./constants.js');
-var Path = require('./path.js');
-
-function Stats(path, fileNode, devName) {
-  this.dev = devName;
-  this.node = fileNode.id;
-  this.type = fileNode.type;
-  this.name = fileNode.name;
-  this.size = fileNode.size;
-  this.nlinks = fileNode.nlinks;
-  this.atime = fileNode.atime;
-  this.mtime = fileNode.mtime;
-  this.ctime = fileNode.ctime;
-  this.version = fileNode.version;
-  this.mode = fileNode.mode;
-  this.uid = fileNode.uid;
-  this.gid = fileNode.gid;
-  this.name = Path.basename(path);
-}
-
-Stats.prototype.isFile = function() {
-  return this.type === Constants.NODE_TYPE_FILE;
-};
-
-Stats.prototype.isDirectory = function() {
-  return this.type === Constants.NODE_TYPE_DIRECTORY;
-};
-
-Stats.prototype.isSymbolicLink = function() {
-  return this.type === Constants.NODE_TYPE_SYMBOLIC_LINK;
-};
-
-// These will always be false in Filer.
-Stats.prototype.isSocket          =
-Stats.prototype.isFIFO            =
-Stats.prototype.isCharacterDevice =
-Stats.prototype.isBlockDevice     =
-function() {
-  return false;
-};
-
-module.exports = Stats;
-
-},{"./constants.js":21,"./path.js":31}],40:[function(require,module,exports){
-var Constants = require('./constants.js');
-
-function SuperNode(options) {
-  var now = Date.now();
-
-  this.id = Constants.SUPER_NODE_ID;
-  this.type = Constants.NODE_TYPE_META;
-  this.atime = options.atime || now;
-  this.ctime = options.ctime || now;
-  this.mtime = options.mtime || now;
-  // root node id (randomly generated)
-  this.rnode = options.rnode;
-}
-
-SuperNode.create = function(options, callback) {
-  options.guid(function(err, rnode) {
-    if(err) {
-      callback(err);
-      return;
-    }
-    options.rnode = options.rnode || rnode;
-    callback(null, new SuperNode(options));
-  });
-};
-
-module.exports = SuperNode;
-
-},{"./constants.js":21}],41:[function(require,module,exports){
-(function (global){
-var Filer = require("../..");
-
-var indexedDB = global.indexedDB       ||
-                global.mozIndexedDB    ||
-                global.webkitIndexedDB ||
-                global.msIndexedDB;
-
-var needsCleanup = [];
-if(global.addEventListener) {
-  global.addEventListener('beforeunload', function() {
-    needsCleanup.forEach(function(f) { f(); });
-  });
-}
-
-function IndexedDBTestProvider(name) {
-  var _done = false;
-  var that = this;
-
-  function cleanup(callback) {
-    callback = callback || function(){};
-
-    if(!that.provider || _done) {
-      return callback();
-    }
-
-    function finished() {
-      that.provider = null;
-      _done = true;
-      callback();
-    }
-
-    try {
-      // We have to force any other connections to close
-      // before we can delete a db.
-      if(that.provider.db) {
-        that.provider.db.close();
-      }
-
-      var request = indexedDB.deleteDatabase(name);
-      request.onsuccess = finished;
-      request.onerror = finished;
-    } catch(e) {
-      console.log("Failed to delete test database", e);
-      finished();
-    }
-  }
-
-  function init() {
-    if(that.provider) {
-      return;
-    }
-    that.provider = new Filer.FileSystem.providers.IndexedDB(name);
-    needsCleanup.push(cleanup);
-  }
-
-  this.init = init;
-  this.cleanup = cleanup;
-}
-IndexedDBTestProvider.isSupported = function() {
-  return Filer.FileSystem.providers.IndexedDB.isSupported();
-};
-
-module.exports = IndexedDBTestProvider;
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../..":28}],42:[function(require,module,exports){
-var Filer = require('../..');
-
-function MemoryTestProvider(name) {
-  var that = this;
-
-  function cleanup(callback) {
-    callback = callback || function(){};
-
-    that.provider = null;
-    callback();
-  }
-
-  function init() {
-    if(that.provider) {
-      return;
-    }
-    that.provider = new Filer.FileSystem.providers.Memory(name);
-  }
-
-  this.init = init;
-  this.cleanup = cleanup;
-}
-MemoryTestProvider.isSupported = function() {
-  return Filer.FileSystem.providers.Memory.isSupported();
-};
-
-module.exports = MemoryTestProvider;
-
-},{"../..":28}],43:[function(require,module,exports){
-(function (global){
-var Filer = require('../..');
-var IndexedDBTestProvider = require('./indexeddb.js');
-var WebSQLTestProvider = require('./websql.js');
-var MemoryTestProvider = require('./memory.js');
-var Url = require('url');
-
-var _provider;
-var _fs;
-
-function uniqueName() {
-  if(!uniqueName.seed) {
-    uniqueName.seed = Date.now();
-  }
-  return 'filer-testdb-' + uniqueName.seed++;
-}
-
-function findBestProvider() {
-  var providers = Filer.FileSystem.providers;
-  if(providers.IndexedDB.isSupported()) {
-    return IndexedDBTestProvider;
-  }
-  if(providers.WebSQL.isSupported()) {
-    return WebSQLTestProvider;
-  }
-  return MemoryTestProvider;
-}
-
-function getUrlParams() {
-  // Check if we are running in node
-  if(!global.location) {
-    return null;
-  }
-
-  var url = Url.parse(global.location.href, true);
-
-  return url.query;
-}
-
-function getProviderType() {
-  var defaultProvider = 'default';
-  var queryString = getUrlParams();
-
-  // If the environment is node or the query string is empty,
-  // the memory provider will be used.
-  if(!queryString) {
-    return defaultProvider;
-  }
-
-  return queryString['filer-provider'] || defaultProvider;
-}
-
-function setup(callback) {
-  // In browser we support specifying the provider via the query string
-  // (e.g., ?filer-provider=IndexedDB). If not specified, we use
-  // the Memory provider by default.
-  var providerType = getProviderType();
-
-  var name = uniqueName();
-
-  switch(providerType.toLowerCase()) {
-    case 'indexeddb':
-      _provider = new IndexedDBTestProvider(name);
-      break;
-    case 'websql':
-      _provider = new WebSQLTestProvider(name);
-      break;
-    case 'memory':
-      _provider = new MemoryTestProvider(name);
-      break;
-    case 'default':
-    default:
-      var BestProvider = findBestProvider();
-      _provider = new BestProvider(name);
-      break;
-  }
-
-  // Allow passing FS flags on query string
-  var flags = global.filerArgs && global.filerArgs.flags ?
-    global.filerArgs.flags : 'FORMAT';
-
-  // Create a file system and wait for it to get setup
-  _provider.init();
-
-  function complete(err, fs) {
-    if(err) throw err;
-    _fs = fs;
-    callback();
-  }
-  return new Filer.FileSystem({
-    name: name,
-    provider: _provider.provider,
-    flags: flags
-  }, complete);
-}
-
-function fs() {
-  if(!_fs) {
-    throw "TestUtil: call setup() before fs()";
-  }
-  return _fs;
-}
-
-function provider() {
-  if(!_provider) {
-    throw "TestUtil: call setup() before provider()";
-  }
-  return _provider;
-}
-
-function shell(options) {
-  var _fs = fs();
-  return new _fs.Shell(options);
-}
-
-function cleanup(callback) {
-  if(!_provider) {
-    return;
-  }
-  _provider.cleanup(function() {
-    _provider = null;
-    _fs = null;
-    callback();
-  });
-}
-
-function typedArrayEqual(a, b) {
-  if(!(a && b)) {
-    return false;
-  }
-  if(a.length !== b.length) {
-    return false;
-  }
-
-  for(var i = 0; i < a.length; ++ i) {
-    if(a[i] !== b[i]) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-module.exports = {
-  uniqueName: uniqueName,
-  setup: setup,
-  fs: fs,
-  shell: shell,
-  provider: provider,
-  providers: {
-    IndexedDB: IndexedDBTestProvider,
-    WebSQL: WebSQLTestProvider,
-    Memory: MemoryTestProvider
-  },
-  cleanup: cleanup,
-  typedArrayEqual: typedArrayEqual
-};
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../..":28,"./indexeddb.js":41,"./memory.js":42,"./websql.js":44,"url":18}],44:[function(require,module,exports){
-(function (global){
-var Filer = require('../..');
-
-var needsCleanup = [];
-if(global.addEventListener) {
-  global.addEventListener('beforeunload', function() {
-    needsCleanup.forEach(function(f) { f(); });
-  });
-}
-
-function WebSQLTestProvider(name) {
-  var _done = false;
-  var that = this;
-
-  function cleanup(callback) {
-    callback = callback || function(){};
-
-    if(!that.provider || _done) {
-      return callback();
-    }
-
-    // Provider is there, but db was never touched
-    if(!that.provider.db) {
-      return callback();
-    }
-
-    var context = that.provider.getReadWriteContext();
-    context.clear(function() {
-      that.provider = null;
-      _done = true;
-      callback();
-    });
-  }
-
-  function init() {
-    if(that.provider) {
-      return;
-    }
-    that.provider = new Filer.FileSystem.providers.WebSQL(name);
-    needsCleanup.push(cleanup);
-  }
-
-  this.init = init;
-  this.cleanup = cleanup;
-}
-WebSQLTestProvider.isSupported = function() {
-  return Filer.FileSystem.providers.WebSQL.isSupported();
-};
-
-module.exports = WebSQLTestProvider;
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../..":28}]},{},[19])(19)
-});
diff --git a/dist/filer-test.js b/dist/filer-test.js
deleted file mode 100644
index fbf152d..0000000
--- a/dist/filer-test.js
+++ /dev/null
@@ -1,20905 +0,0 @@
-(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
-/*global setImmediate: false, setTimeout: false, console: false */
-
-/**
- * async.js shim, based on https://raw.github.com/caolan/async/master/lib/async.js Feb 18, 2014
- * Used under MIT - https://github.com/caolan/async/blob/master/LICENSE
- */
-
-(function () {
-
-    var async = {};
-
-    // async.js functions used in Filer
-
-    //// nextTick implementation with browser-compatible fallback ////
-    if (typeof process === 'undefined' || !(process.nextTick)) {
-        if (typeof setImmediate === 'function') {
-            async.nextTick = function (fn) {
-                // not a direct alias for IE10 compatibility
-                setImmediate(fn);
-            };
-            async.setImmediate = async.nextTick;
-        }
-        else {
-            async.nextTick = function (fn) {
-                setTimeout(fn, 0);
-            };
-            async.setImmediate = async.nextTick;
-        }
-    }
-    else {
-        async.nextTick = process.nextTick;
-        if (typeof setImmediate !== 'undefined') {
-            async.setImmediate = function (fn) {
-              // not a direct alias for IE10 compatibility
-              setImmediate(fn);
-            };
-        }
-        else {
-            async.setImmediate = async.nextTick;
-        }
-    }
-
-    async.eachSeries = function (arr, iterator, callback) {
-        callback = callback || function () {};
-        if (!arr.length) {
-            return callback();
-        }
-        var completed = 0;
-        var iterate = function () {
-            iterator(arr[completed], function (err) {
-                if (err) {
-                    callback(err);
-                    callback = function () {};
-                }
-                else {
-                    completed += 1;
-                    if (completed >= arr.length) {
-                        callback();
-                    }
-                    else {
-                        iterate();
-                    }
-                }
-            });
-        };
-        iterate();
-    };
-    async.forEachSeries = async.eachSeries;
-
-    // AMD / RequireJS
-    if (typeof define !== 'undefined' && define.amd) {
-        define([], function () {
-            return async;
-        });
-    }
-    // Node.js
-    else if (typeof module !== 'undefined' && module.exports) {
-        module.exports = async;
-    }
-    // included directly via <script> tag
-    else {
-        root.async = async;
-    }
-
-}());
-
-},{}],2:[function(require,module,exports){
-// Based on https://github.com/diy/intercom.js/blob/master/lib/events.js
-// Copyright 2012 DIY Co Apache License, Version 2.0
-// http://www.apache.org/licenses/LICENSE-2.0
-
-function removeItem(item, array) {
-  for (var i = array.length - 1; i >= 0; i--) {
-    if (array[i] === item) {
-      array.splice(i, 1);
-    }
-  }
-  return array;
-}
-
-var EventEmitter = function() {};
-
-EventEmitter.createInterface = function(space) {
-  var methods = {};
-
-  methods.on = function(name, fn) {
-    if (typeof this[space] === 'undefined') {
-      this[space] = {};
-    }
-    if (!this[space].hasOwnProperty(name)) {
-      this[space][name] = [];
-    }
-    this[space][name].push(fn);
-  };
-
-  methods.off = function(name, fn) {
-    if (typeof this[space] === 'undefined') return;
-    if (this[space].hasOwnProperty(name)) {
-      removeItem(fn, this[space][name]);
-    }
-  };
-
-  methods.trigger = function(name) {
-    if (typeof this[space] !== 'undefined' && this[space].hasOwnProperty(name)) {
-      var args = Array.prototype.slice.call(arguments, 1);
-      for (var i = 0; i < this[space][name].length; i++) {
-        this[space][name][i].apply(this[space][name][i], args);
-      }
-    }
-  };
-
-  methods.removeAllListeners = function(name) {
-    if (typeof this[space] === 'undefined') return;
-    var self = this;
-    self[space][name].forEach(function(fn) {
-      self.off(name, fn);
-    });
-  };
-
-  return methods;
-};
-
-var pvt = EventEmitter.createInterface('_handlers');
-EventEmitter.prototype._on = pvt.on;
-EventEmitter.prototype._off = pvt.off;
-EventEmitter.prototype._trigger = pvt.trigger;
-
-var pub = EventEmitter.createInterface('handlers');
-EventEmitter.prototype.on = function() {
-  pub.on.apply(this, arguments);
-  Array.prototype.unshift.call(arguments, 'on');
-  this._trigger.apply(this, arguments);
-};
-EventEmitter.prototype.off = pub.off;
-EventEmitter.prototype.trigger = pub.trigger;
-EventEmitter.prototype.removeAllListeners = pub.removeAllListeners;
-
-module.exports = EventEmitter;
-
-},{}],3:[function(require,module,exports){
-(function (global){
-// Based on https://github.com/diy/intercom.js/blob/master/lib/intercom.js
-// Copyright 2012 DIY Co Apache License, Version 2.0
-// http://www.apache.org/licenses/LICENSE-2.0
-
-var EventEmitter = require('./eventemitter.js');
-var guid = require('../src/shared.js').guid;
-
-function throttle(delay, fn) {
-  var last = 0;
-  return function() {
-    var now = Date.now();
-    if (now - last > delay) {
-      last = now;
-      fn.apply(this, arguments);
-    }
-  };
-}
-
-function extend(a, b) {
-  if (typeof a === 'undefined' || !a) { a = {}; }
-  if (typeof b === 'object') {
-    for (var key in b) {
-      if (b.hasOwnProperty(key)) {
-        a[key] = b[key];
-      }
-    }
-  }
-  return a;
-}
-
-var localStorage = (function(window) {
-  if (typeof window === 'undefined' ||
-      typeof window.localStorage === 'undefined') {
-    return {
-      getItem : function() {},
-      setItem : function() {},
-      removeItem : function() {}
-    };
-  }
-  return window.localStorage;
-}(global));
-
-function Intercom() {
-  var self = this;
-  var now = Date.now();
-
-  this.origin         = guid();
-  this.lastMessage    = now;
-  this.receivedIDs    = {};
-  this.previousValues = {};
-
-  var storageHandler = function() {
-    self._onStorageEvent.apply(self, arguments);
-  };
-
-  // If we're in node.js, skip event registration
-  if (typeof document === 'undefined') {
-    return;
-  }
-
-  if (document.attachEvent) {
-    document.attachEvent('onstorage', storageHandler);
-  } else {
-    global.addEventListener('storage', storageHandler, false);
-  }
-}
-
-Intercom.prototype._transaction = function(fn) {
-  var TIMEOUT   = 1000;
-  var WAIT      = 20;
-  var self      = this;
-  var executed  = false;
-  var listening = false;
-  var waitTimer = null;
-
-  function lock() {
-    if (executed) {
-      return;
-    }
-
-    var now = Date.now();
-    var activeLock = localStorage.getItem(INDEX_LOCK)|0;
-    if (activeLock && now - activeLock < TIMEOUT) {
-      if (!listening) {
-        self._on('storage', lock);
-        listening = true;
-      }
-      waitTimer = setTimeout(lock, WAIT);
-      return;
-    }
-    executed = true;
-    localStorage.setItem(INDEX_LOCK, now);
-
-    fn();
-    unlock();
-  }
-
-  function unlock() {
-    if (listening) {
-      self._off('storage', lock);
-    }
-    if (waitTimer) {
-      clearTimeout(waitTimer);
-    }
-    localStorage.removeItem(INDEX_LOCK);
-  }
-
-  lock();
-};
-
-Intercom.prototype._cleanup_emit = throttle(100, function() {
-  var self = this;
-
-  self._transaction(function() {
-    var now = Date.now();
-    var threshold = now - THRESHOLD_TTL_EMIT;
-    var changed = 0;
-    var messages;
-
-    try {
-      messages = JSON.parse(localStorage.getItem(INDEX_EMIT) || '[]');
-    } catch(e) {
-      messages = [];
-    }
-    for (var i = messages.length - 1; i >= 0; i--) {
-      if (messages[i].timestamp < threshold) {
-        messages.splice(i, 1);
-        changed++;
-      }
-    }
-    if (changed > 0) {
-      localStorage.setItem(INDEX_EMIT, JSON.stringify(messages));
-    }
-  });
-});
-
-Intercom.prototype._cleanup_once = throttle(100, function() {
-  var self = this;
-
-  self._transaction(function() {
-    var timestamp, ttl, key;
-    var table;
-    var now  = Date.now();
-    var changed = 0;
-
-    try {
-      table = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');
-    } catch(e) {
-      table = {};
-    }
-    for (key in table) {
-      if (self._once_expired(key, table)) {
-        delete table[key];
-        changed++;
-      }
-    }
-
-    if (changed > 0) {
-      localStorage.setItem(INDEX_ONCE, JSON.stringify(table));
-    }
-  });
-});
-
-Intercom.prototype._once_expired = function(key, table) {
-  if (!table) {
-    return true;
-  }
-  if (!table.hasOwnProperty(key)) {
-    return true;
-  }
-  if (typeof table[key] !== 'object') {
-    return true;
-  }
-
-  var ttl = table[key].ttl || THRESHOLD_TTL_ONCE;
-  var now = Date.now();
-  var timestamp = table[key].timestamp;
-  return timestamp < now - ttl;
-};
-
-Intercom.prototype._localStorageChanged = function(event, field) {
-  if (event && event.key) {
-    return event.key === field;
-  }
-
-  var currentValue = localStorage.getItem(field);
-  if (currentValue === this.previousValues[field]) {
-    return false;
-  }
-  this.previousValues[field] = currentValue;
-  return true;
-};
-
-Intercom.prototype._onStorageEvent = function(event) {
-  event = event || global.event;
-  var self = this;
-
-  if (this._localStorageChanged(event, INDEX_EMIT)) {
-    this._transaction(function() {
-      var now = Date.now();
-      var data = localStorage.getItem(INDEX_EMIT);
-      var messages;
-
-      try {
-        messages = JSON.parse(data || '[]');
-      } catch(e) {
-        messages = [];
-      }
-      for (var i = 0; i < messages.length; i++) {
-        if (messages[i].origin === self.origin) continue;
-        if (messages[i].timestamp < self.lastMessage) continue;
-        if (messages[i].id) {
-          if (self.receivedIDs.hasOwnProperty(messages[i].id)) continue;
-          self.receivedIDs[messages[i].id] = true;
-        }
-        self.trigger(messages[i].name, messages[i].payload);
-      }
-      self.lastMessage = now;
-    });
-  }
-
-  this._trigger('storage', event);
-};
-
-Intercom.prototype._emit = function(name, message, id) {
-  id = (typeof id === 'string' || typeof id === 'number') ? String(id) : null;
-  if (id && id.length) {
-    if (this.receivedIDs.hasOwnProperty(id)) return;
-    this.receivedIDs[id] = true;
-  }
-
-  var packet = {
-    id        : id,
-    name      : name,
-    origin    : this.origin,
-    timestamp : Date.now(),
-    payload   : message
-  };
-
-  var self = this;
-  this._transaction(function() {
-    var data = localStorage.getItem(INDEX_EMIT) || '[]';
-    var delimiter = (data === '[]') ? '' : ',';
-    data = [data.substring(0, data.length - 1), delimiter, JSON.stringify(packet), ']'].join('');
-    localStorage.setItem(INDEX_EMIT, data);
-    self.trigger(name, message);
-
-    setTimeout(function() {
-      self._cleanup_emit();
-    }, 50);
-  });
-};
-
-Intercom.prototype.emit = function(name, message) {
-  this._emit.apply(this, arguments);
-  this._trigger('emit', name, message);
-};
-
-Intercom.prototype.once = function(key, fn, ttl) {
-  if (!Intercom.supported) {
-    return;
-  }
-
-  var self = this;
-  this._transaction(function() {
-    var data;
-    try {
-      data = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');
-    } catch(e) {
-      data = {};
-    }
-    if (!self._once_expired(key, data)) {
-      return;
-    }
-
-    data[key] = {};
-    data[key].timestamp = Date.now();
-    if (typeof ttl === 'number') {
-      data[key].ttl = ttl * 1000;
-    }
-
-    localStorage.setItem(INDEX_ONCE, JSON.stringify(data));
-    fn();
-
-    setTimeout(function() {
-      self._cleanup_once();
-    }, 50);
-  });
-};
-
-extend(Intercom.prototype, EventEmitter.prototype);
-
-Intercom.supported = (typeof localStorage !== 'undefined');
-
-var INDEX_EMIT = 'intercom';
-var INDEX_ONCE = 'intercom_once';
-var INDEX_LOCK = 'intercom_lock';
-
-var THRESHOLD_TTL_EMIT = 50000;
-var THRESHOLD_TTL_ONCE = 1000 * 3600;
-
-Intercom.destroy = function() {
-  localStorage.removeItem(INDEX_LOCK);
-  localStorage.removeItem(INDEX_EMIT);
-  localStorage.removeItem(INDEX_ONCE);
-};
-
-Intercom.getInstance = (function() {
-  var intercom;
-  return function() {
-    if (!intercom) {
-      intercom = new Intercom();
-    }
-    return intercom;
-  };
-})();
-
-module.exports = Intercom;
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../src/shared.js":67,"./eventemitter.js":2}],4:[function(require,module,exports){
-// Cherry-picked bits of underscore.js, lodash.js
-
-/**
- * Lo-Dash 2.4.0 <http://lodash.com/>
- * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
- * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- * Available under MIT license <http://lodash.com/license>
- */
-var ArrayProto = Array.prototype;
-var nativeForEach = ArrayProto.forEach;
-var nativeIndexOf = ArrayProto.indexOf;
-var nativeSome = ArrayProto.some;
-
-var ObjProto = Object.prototype;
-var hasOwnProperty = ObjProto.hasOwnProperty;
-var nativeKeys = Object.keys;
-
-var breaker = {};
-
-function has(obj, key) {
-  return hasOwnProperty.call(obj, key);
-}
-
-var keys = nativeKeys || function(obj) {
-  if (obj !== Object(obj)) throw new TypeError('Invalid object');
-  var keys = [];
-  for (var key in obj) if (has(obj, key)) keys.push(key);
-  return keys;
-};
-
-function size(obj) {
-  if (obj == null) return 0;
-  return (obj.length === +obj.length) ? obj.length : keys(obj).length;
-}
-
-function identity(value) {
-  return value;
-}
-
-function each(obj, iterator, context) {
-  var i, length;
-  if (obj == null) return;
-  if (nativeForEach && obj.forEach === nativeForEach) {
-    obj.forEach(iterator, context);
-  } else if (obj.length === +obj.length) {
-    for (i = 0, length = obj.length; i < length; i++) {
-      if (iterator.call(context, obj[i], i, obj) === breaker) return;
-    }
-  } else {
-    var keys = keys(obj);
-    for (i = 0, length = keys.length; i < length; i++) {
-      if (iterator.call(context, obj[keys[i]], keys[i], obj) === breaker) return;
-    }
-  }
-};
-
-function any(obj, iterator, context) {
-  iterator || (iterator = identity);
-  var result = false;
-  if (obj == null) return result;
-  if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
-  each(obj, function(value, index, list) {
-    if (result || (result = iterator.call(context, value, index, list))) return breaker;
-  });
-  return !!result;
-};
-
-function contains(obj, target) {
-  if (obj == null) return false;
-  if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
-  return any(obj, function(value) {
-    return value === target;
-  });
-};
-
-function Wrapped(value) {
-  this.value = value;
-}
-Wrapped.prototype.has = function(key) {
-  return has(this.value, key);
-};
-Wrapped.prototype.contains = function(target) {
-  return contains(this.value, target);
-};
-Wrapped.prototype.size = function() {
-  return size(this.value);
-};
-
-function nodash(value) {
-  // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor
-  return (value && typeof value == 'object' && !Array.isArray(value) && hasOwnProperty.call(value, '__wrapped__'))
-    ? value
-    : new Wrapped(value);
-}
-
-module.exports = nodash;
-
-},{}],5:[function(require,module,exports){
-/*!
- * assertion-error
- * Copyright(c) 2013 Jake Luer <jake@qualiancy.com>
- * MIT Licensed
- */
-
-/*!
- * Return a function that will copy properties from
- * one object to another excluding any originally
- * listed. Returned function will create a new `{}`.
- *
- * @param {String} excluded properties ...
- * @return {Function}
- */
-
-function exclude () {
-  var excludes = [].slice.call(arguments);
-
-  function excludeProps (res, obj) {
-    Object.keys(obj).forEach(function (key) {
-      if (!~excludes.indexOf(key)) res[key] = obj[key];
-    });
-  }
-
-  return function extendExclude () {
-    var args = [].slice.call(arguments)
-      , i = 0
-      , res = {};
-
-    for (; i < args.length; i++) {
-      excludeProps(res, args[i]);
-    }
-
-    return res;
-  };
-};
-
-/*!
- * Primary Exports
- */
-
-module.exports = AssertionError;
-
-/**
- * ### AssertionError
- *
- * An extension of the JavaScript `Error` constructor for
- * assertion and validation scenarios.
- *
- * @param {String} message
- * @param {Object} properties to include (optional)
- * @param {callee} start stack function (optional)
- */
-
-function AssertionError (message, _props, ssf) {
-  var extend = exclude('name', 'message', 'stack', 'constructor', 'toJSON')
-    , props = extend(_props || {});
-
-  // default values
-  this.message = message || 'Unspecified AssertionError';
-  this.showDiff = false;
-
-  // copy from properties
-  for (var key in props) {
-    this[key] = props[key];
-  }
-
-  // capture stack trace
-  ssf = ssf || arguments.callee;
-  if (ssf && Error.captureStackTrace) {
-    Error.captureStackTrace(this, ssf);
-  }
-}
-
-/*!
- * Inherit from Error.prototype
- */
-
-AssertionError.prototype = Object.create(Error.prototype);
-
-/*!
- * Statically set name
- */
-
-AssertionError.prototype.name = 'AssertionError';
-
-/*!
- * Ensure correct constructor
- */
-
-AssertionError.prototype.constructor = AssertionError;
-
-/**
- * Allow errors to be converted to JSON for static transfer.
- *
- * @param {Boolean} include stack (default: `true`)
- * @return {Object} object that can be `JSON.stringify`
- */
-
-AssertionError.prototype.toJSON = function (stack) {
-  var extend = exclude('constructor', 'toJSON', 'stack')
-    , props = extend({ name: this.name }, this);
-
-  // include stack if exists and not turned off
-  if (false !== stack && this.stack) {
-    props.stack = this.stack;
-  }
-
-  return props;
-};
-
-},{}],6:[function(require,module,exports){
-/*
- * base64-arraybuffer
- * https://github.com/niklasvh/base64-arraybuffer
- *
- * Copyright (c) 2012 Niklas von Hertzen
- * Licensed under the MIT license.
- */
-(function(){
-  "use strict";
-
-  var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-  // Use a lookup table to find the index.
-  var lookup = new Uint8Array(256);
-  for (var i = 0; i < chars.length; i++) {
-    lookup[chars.charCodeAt(i)] = i;
-  }
-
-  exports.encode = function(arraybuffer) {
-    var bytes = new Uint8Array(arraybuffer),
-    i, len = bytes.length, base64 = "";
-
-    for (i = 0; i < len; i+=3) {
-      base64 += chars[bytes[i] >> 2];
-      base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
-      base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
-      base64 += chars[bytes[i + 2] & 63];
-    }
-
-    if ((len % 3) === 2) {
-      base64 = base64.substring(0, base64.length - 1) + "=";
-    } else if (len % 3 === 1) {
-      base64 = base64.substring(0, base64.length - 2) + "==";
-    }
-
-    return base64;
-  };
-
-  exports.decode =  function(base64) {
-    var bufferLength = base64.length * 0.75,
-    len = base64.length, i, p = 0,
-    encoded1, encoded2, encoded3, encoded4;
-
-    if (base64[base64.length - 1] === "=") {
-      bufferLength--;
-      if (base64[base64.length - 2] === "=") {
-        bufferLength--;
-      }
-    }
-
-    var arraybuffer = new ArrayBuffer(bufferLength),
-    bytes = new Uint8Array(arraybuffer);
-
-    for (i = 0; i < len; i+=4) {
-      encoded1 = lookup[base64.charCodeAt(i)];
-      encoded2 = lookup[base64.charCodeAt(i+1)];
-      encoded3 = lookup[base64.charCodeAt(i+2)];
-      encoded4 = lookup[base64.charCodeAt(i+3)];
-
-      bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
-      bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
-      bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
-    }
-
-    return arraybuffer;
-  };
-})();
-
-},{}],7:[function(require,module,exports){
-var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
-
-;(function (exports) {
-	'use strict';
-
-  var Arr = (typeof Uint8Array !== 'undefined')
-    ? Uint8Array
-    : Array
-
-	var PLUS   = '+'.charCodeAt(0)
-	var SLASH  = '/'.charCodeAt(0)
-	var NUMBER = '0'.charCodeAt(0)
-	var LOWER  = 'a'.charCodeAt(0)
-	var UPPER  = 'A'.charCodeAt(0)
-	var PLUS_URL_SAFE = '-'.charCodeAt(0)
-	var SLASH_URL_SAFE = '_'.charCodeAt(0)
-
-	function decode (elt) {
-		var code = elt.charCodeAt(0)
-		if (code === PLUS ||
-		    code === PLUS_URL_SAFE)
-			return 62 // '+'
-		if (code === SLASH ||
-		    code === SLASH_URL_SAFE)
-			return 63 // '/'
-		if (code < NUMBER)
-			return -1 //no match
-		if (code < NUMBER + 10)
-			return code - NUMBER + 26 + 26
-		if (code < UPPER + 26)
-			return code - UPPER
-		if (code < LOWER + 26)
-			return code - LOWER + 26
-	}
-
-	function b64ToByteArray (b64) {
-		var i, j, l, tmp, placeHolders, arr
-
-		if (b64.length % 4 > 0) {
-			throw new Error('Invalid string. Length must be a multiple of 4')
-		}
-
-		// the number of equal signs (place holders)
-		// if there are two placeholders, than the two characters before it
-		// represent one byte
-		// if there is only one, then the three characters before it represent 2 bytes
-		// this is just a cheap hack to not do indexOf twice
-		var len = b64.length
-		placeHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0
-
-		// base64 is 4/3 + up to two characters of the original data
-		arr = new Arr(b64.length * 3 / 4 - placeHolders)
-
-		// if there are placeholders, only get up to the last complete 4 chars
-		l = placeHolders > 0 ? b64.length - 4 : b64.length
-
-		var L = 0
-
-		function push (v) {
-			arr[L++] = v
-		}
-
-		for (i = 0, j = 0; i < l; i += 4, j += 3) {
-			tmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))
-			push((tmp & 0xFF0000) >> 16)
-			push((tmp & 0xFF00) >> 8)
-			push(tmp & 0xFF)
-		}
-
-		if (placeHolders === 2) {
-			tmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)
-			push(tmp & 0xFF)
-		} else if (placeHolders === 1) {
-			tmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)
-			push((tmp >> 8) & 0xFF)
-			push(tmp & 0xFF)
-		}
-
-		return arr
-	}
-
-	function uint8ToBase64 (uint8) {
-		var i,
-			extraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes
-			output = "",
-			temp, length
-
-		function encode (num) {
-			return lookup.charAt(num)
-		}
-
-		function tripletToBase64 (num) {
-			return encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)
-		}
-
-		// go through the array every three bytes, we'll deal with trailing stuff later
-		for (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {
-			temp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
-			output += tripletToBase64(temp)
-		}
-
-		// pad the end with zeros, but make sure to not forget the extra bytes
-		switch (extraBytes) {
-			case 1:
-				temp = uint8[uint8.length - 1]
-				output += encode(temp >> 2)
-				output += encode((temp << 4) & 0x3F)
-				output += '=='
-				break
-			case 2:
-				temp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])
-				output += encode(temp >> 10)
-				output += encode((temp >> 4) & 0x3F)
-				output += encode((temp << 2) & 0x3F)
-				output += '='
-				break
-		}
-
-		return output
-	}
-
-	exports.toByteArray = b64ToByteArray
-	exports.fromByteArray = uint8ToBase64
-}(typeof exports === 'undefined' ? (this.base64js = {}) : exports))
-
-},{}],8:[function(require,module,exports){
-(function (global){
-/*!
- * The buffer module from node.js, for the browser.
- *
- * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
- * @license  MIT
- */
-/* eslint-disable no-proto */
-
-'use strict'
-
-var base64 = require('base64-js')
-var ieee754 = require('ieee754')
-var isArray = require('isarray')
-
-exports.Buffer = Buffer
-exports.SlowBuffer = SlowBuffer
-exports.INSPECT_MAX_BYTES = 50
-Buffer.poolSize = 8192 // not used by this implementation
-
-var rootParent = {}
-
-/**
- * If `Buffer.TYPED_ARRAY_SUPPORT`:
- *   === true    Use Uint8Array implementation (fastest)
- *   === false   Use Object implementation (most compatible, even IE6)
- *
- * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
- * Opera 11.6+, iOS 4.2+.
- *
- * Due to various browser bugs, sometimes the Object implementation will be used even
- * when the browser supports typed arrays.
- *
- * Note:
- *
- *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
- *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
- *
- *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property
- *     on objects.
- *
- *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
- *
- *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
- *     incorrect length in some situations.
-
- * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
- * get the Object implementation, which is slower but behaves correctly.
- */
-Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
-  ? global.TYPED_ARRAY_SUPPORT
-  : typedArraySupport()
-
-function typedArraySupport () {
-  function Bar () {}
-  try {
-    var arr = new Uint8Array(1)
-    arr.foo = function () { return 42 }
-    arr.constructor = Bar
-    return arr.foo() === 42 && // typed array instances can be augmented
-        arr.constructor === Bar && // constructor can be set
-        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
-        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
-  } catch (e) {
-    return false
-  }
-}
-
-function kMaxLength () {
-  return Buffer.TYPED_ARRAY_SUPPORT
-    ? 0x7fffffff
-    : 0x3fffffff
-}
-
-/**
- * Class: Buffer
- * =============
- *
- * The Buffer constructor returns instances of `Uint8Array` that are augmented
- * with function properties for all the node `Buffer` API functions. We use
- * `Uint8Array` so that square bracket notation works as expected -- it returns
- * a single octet.
- *
- * By augmenting the instances, we can avoid modifying the `Uint8Array`
- * prototype.
- */
-function Buffer (arg) {
-  if (!(this instanceof Buffer)) {
-    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.
-    if (arguments.length > 1) return new Buffer(arg, arguments[1])
-    return new Buffer(arg)
-  }
-
-  if (!Buffer.TYPED_ARRAY_SUPPORT) {
-    this.length = 0
-    this.parent = undefined
-  }
-
-  // Common case.
-  if (typeof arg === 'number') {
-    return fromNumber(this, arg)
-  }
-
-  // Slightly less common case.
-  if (typeof arg === 'string') {
-    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')
-  }
-
-  // Unusual.
-  return fromObject(this, arg)
-}
-
-function fromNumber (that, length) {
-  that = allocate(that, length < 0 ? 0 : checked(length) | 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) {
-    for (var i = 0; i < length; i++) {
-      that[i] = 0
-    }
-  }
-  return that
-}
-
-function fromString (that, string, encoding) {
-  if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'
-
-  // Assumption: byteLength() return value is always < kMaxLength.
-  var length = byteLength(string, encoding) | 0
-  that = allocate(that, length)
-
-  that.write(string, encoding)
-  return that
-}
-
-function fromObject (that, object) {
-  if (Buffer.isBuffer(object)) return fromBuffer(that, object)
-
-  if (isArray(object)) return fromArray(that, object)
-
-  if (object == null) {
-    throw new TypeError('must start with number, buffer, array or string')
-  }
-
-  if (typeof ArrayBuffer !== 'undefined') {
-    if (object.buffer instanceof ArrayBuffer) {
-      return fromTypedArray(that, object)
-    }
-    if (object instanceof ArrayBuffer) {
-      return fromArrayBuffer(that, object)
-    }
-  }
-
-  if (object.length) return fromArrayLike(that, object)
-
-  return fromJsonObject(that, object)
-}
-
-function fromBuffer (that, buffer) {
-  var length = checked(buffer.length) | 0
-  that = allocate(that, length)
-  buffer.copy(that, 0, 0, length)
-  return that
-}
-
-function fromArray (that, array) {
-  var length = checked(array.length) | 0
-  that = allocate(that, length)
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
-
-// Duplicate of fromArray() to keep fromArray() monomorphic.
-function fromTypedArray (that, array) {
-  var length = checked(array.length) | 0
-  that = allocate(that, length)
-  // Truncating the elements is probably not what people expect from typed
-  // arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior
-  // of the old Buffer constructor.
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
-
-function fromArrayBuffer (that, array) {
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    array.byteLength
-    that = Buffer._augment(new Uint8Array(array))
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    that = fromTypedArray(that, new Uint8Array(array))
-  }
-  return that
-}
-
-function fromArrayLike (that, array) {
-  var length = checked(array.length) | 0
-  that = allocate(that, length)
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
-
-// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.
-// Returns a zero-length buffer for inputs that don't conform to the spec.
-function fromJsonObject (that, object) {
-  var array
-  var length = 0
-
-  if (object.type === 'Buffer' && isArray(object.data)) {
-    array = object.data
-    length = checked(array.length) | 0
-  }
-  that = allocate(that, length)
-
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
-
-if (Buffer.TYPED_ARRAY_SUPPORT) {
-  Buffer.prototype.__proto__ = Uint8Array.prototype
-  Buffer.__proto__ = Uint8Array
-} else {
-  // pre-set for values that may exist in the future
-  Buffer.prototype.length = undefined
-  Buffer.prototype.parent = undefined
-}
-
-function allocate (that, length) {
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    that = Buffer._augment(new Uint8Array(length))
-    that.__proto__ = Buffer.prototype
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    that.length = length
-    that._isBuffer = true
-  }
-
-  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1
-  if (fromPool) that.parent = rootParent
-
-  return that
-}
-
-function checked (length) {
-  // Note: cannot use `length < kMaxLength` here because that fails when
-  // length is NaN (which is otherwise coerced to zero.)
-  if (length >= kMaxLength()) {
-    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
-                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
-  }
-  return length | 0
-}
-
-function SlowBuffer (subject, encoding) {
-  if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)
-
-  var buf = new Buffer(subject, encoding)
-  delete buf.parent
-  return buf
-}
-
-Buffer.isBuffer = function isBuffer (b) {
-  return !!(b != null && b._isBuffer)
-}
-
-Buffer.compare = function compare (a, b) {
-  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
-    throw new TypeError('Arguments must be Buffers')
-  }
-
-  if (a === b) return 0
-
-  var x = a.length
-  var y = b.length
-
-  var i = 0
-  var len = Math.min(x, y)
-  while (i < len) {
-    if (a[i] !== b[i]) break
-
-    ++i
-  }
-
-  if (i !== len) {
-    x = a[i]
-    y = b[i]
-  }
-
-  if (x < y) return -1
-  if (y < x) return 1
-  return 0
-}
-
-Buffer.isEncoding = function isEncoding (encoding) {
-  switch (String(encoding).toLowerCase()) {
-    case 'hex':
-    case 'utf8':
-    case 'utf-8':
-    case 'ascii':
-    case 'binary':
-    case 'base64':
-    case 'raw':
-    case 'ucs2':
-    case 'ucs-2':
-    case 'utf16le':
-    case 'utf-16le':
-      return true
-    default:
-      return false
-  }
-}
-
-Buffer.concat = function concat (list, length) {
-  if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')
-
-  if (list.length === 0) {
-    return new Buffer(0)
-  }
-
-  var i
-  if (length === undefined) {
-    length = 0
-    for (i = 0; i < list.length; i++) {
-      length += list[i].length
-    }
-  }
-
-  var buf = new Buffer(length)
-  var pos = 0
-  for (i = 0; i < list.length; i++) {
-    var item = list[i]
-    item.copy(buf, pos)
-    pos += item.length
-  }
-  return buf
-}
-
-function byteLength (string, encoding) {
-  if (typeof string !== 'string') string = '' + string
-
-  var len = string.length
-  if (len === 0) return 0
-
-  // Use a for loop to avoid recursion
-  var loweredCase = false
-  for (;;) {
-    switch (encoding) {
-      case 'ascii':
-      case 'binary':
-      // Deprecated
-      case 'raw':
-      case 'raws':
-        return len
-      case 'utf8':
-      case 'utf-8':
-        return utf8ToBytes(string).length
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return len * 2
-      case 'hex':
-        return len >>> 1
-      case 'base64':
-        return base64ToBytes(string).length
-      default:
-        if (loweredCase) return utf8ToBytes(string).length // assume utf8
-        encoding = ('' + encoding).toLowerCase()
-        loweredCase = true
-    }
-  }
-}
-Buffer.byteLength = byteLength
-
-function slowToString (encoding, start, end) {
-  var loweredCase = false
-
-  start = start | 0
-  end = end === undefined || end === Infinity ? this.length : end | 0
-
-  if (!encoding) encoding = 'utf8'
-  if (start < 0) start = 0
-  if (end > this.length) end = this.length
-  if (end <= start) return ''
-
-  while (true) {
-    switch (encoding) {
-      case 'hex':
-        return hexSlice(this, start, end)
-
-      case 'utf8':
-      case 'utf-8':
-        return utf8Slice(this, start, end)
-
-      case 'ascii':
-        return asciiSlice(this, start, end)
-
-      case 'binary':
-        return binarySlice(this, start, end)
-
-      case 'base64':
-        return base64Slice(this, start, end)
-
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return utf16leSlice(this, start, end)
-
-      default:
-        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
-        encoding = (encoding + '').toLowerCase()
-        loweredCase = true
-    }
-  }
-}
-
-Buffer.prototype.toString = function toString () {
-  var length = this.length | 0
-  if (length === 0) return ''
-  if (arguments.length === 0) return utf8Slice(this, 0, length)
-  return slowToString.apply(this, arguments)
-}
-
-Buffer.prototype.equals = function equals (b) {
-  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
-  if (this === b) return true
-  return Buffer.compare(this, b) === 0
-}
-
-Buffer.prototype.inspect = function inspect () {
-  var str = ''
-  var max = exports.INSPECT_MAX_BYTES
-  if (this.length > 0) {
-    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
-    if (this.length > max) str += ' ... '
-  }
-  return '<Buffer ' + str + '>'
-}
-
-Buffer.prototype.compare = function compare (b) {
-  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
-  if (this === b) return 0
-  return Buffer.compare(this, b)
-}
-
-Buffer.prototype.indexOf = function indexOf (val, byteOffset) {
-  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff
-  else if (byteOffset < -0x80000000) byteOffset = -0x80000000
-  byteOffset >>= 0
-
-  if (this.length === 0) return -1
-  if (byteOffset >= this.length) return -1
-
-  // Negative offsets start from the end of the buffer
-  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)
-
-  if (typeof val === 'string') {
-    if (val.length === 0) return -1 // special case: looking for empty string always fails
-    return String.prototype.indexOf.call(this, val, byteOffset)
-  }
-  if (Buffer.isBuffer(val)) {
-    return arrayIndexOf(this, val, byteOffset)
-  }
-  if (typeof val === 'number') {
-    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {
-      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)
-    }
-    return arrayIndexOf(this, [ val ], byteOffset)
-  }
-
-  function arrayIndexOf (arr, val, byteOffset) {
-    var foundIndex = -1
-    for (var i = 0; byteOffset + i < arr.length; i++) {
-      if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {
-        if (foundIndex === -1) foundIndex = i
-        if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex
-      } else {
-        foundIndex = -1
-      }
-    }
-    return -1
-  }
-
-  throw new TypeError('val must be string, number or Buffer')
-}
-
-// `get` is deprecated
-Buffer.prototype.get = function get (offset) {
-  console.log('.get() is deprecated. Access using array indexes instead.')
-  return this.readUInt8(offset)
-}
-
-// `set` is deprecated
-Buffer.prototype.set = function set (v, offset) {
-  console.log('.set() is deprecated. Access using array indexes instead.')
-  return this.writeUInt8(v, offset)
-}
-
-function hexWrite (buf, string, offset, length) {
-  offset = Number(offset) || 0
-  var remaining = buf.length - offset
-  if (!length) {
-    length = remaining
-  } else {
-    length = Number(length)
-    if (length > remaining) {
-      length = remaining
-    }
-  }
-
-  // must be an even number of digits
-  var strLen = string.length
-  if (strLen % 2 !== 0) throw new Error('Invalid hex string')
-
-  if (length > strLen / 2) {
-    length = strLen / 2
-  }
-  for (var i = 0; i < length; i++) {
-    var parsed = parseInt(string.substr(i * 2, 2), 16)
-    if (isNaN(parsed)) throw new Error('Invalid hex string')
-    buf[offset + i] = parsed
-  }
-  return i
-}
-
-function utf8Write (buf, string, offset, length) {
-  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
-}
-
-function asciiWrite (buf, string, offset, length) {
-  return blitBuffer(asciiToBytes(string), buf, offset, length)
-}
-
-function binaryWrite (buf, string, offset, length) {
-  return asciiWrite(buf, string, offset, length)
-}
-
-function base64Write (buf, string, offset, length) {
-  return blitBuffer(base64ToBytes(string), buf, offset, length)
-}
-
-function ucs2Write (buf, string, offset, length) {
-  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
-}
-
-Buffer.prototype.write = function write (string, offset, length, encoding) {
-  // Buffer#write(string)
-  if (offset === undefined) {
-    encoding = 'utf8'
-    length = this.length
-    offset = 0
-  // Buffer#write(string, encoding)
-  } else if (length === undefined && typeof offset === 'string') {
-    encoding = offset
-    length = this.length
-    offset = 0
-  // Buffer#write(string, offset[, length][, encoding])
-  } else if (isFinite(offset)) {
-    offset = offset | 0
-    if (isFinite(length)) {
-      length = length | 0
-      if (encoding === undefined) encoding = 'utf8'
-    } else {
-      encoding = length
-      length = undefined
-    }
-  // legacy write(string, encoding, offset, length) - remove in v0.13
-  } else {
-    var swap = encoding
-    encoding = offset
-    offset = length | 0
-    length = swap
-  }
-
-  var remaining = this.length - offset
-  if (length === undefined || length > remaining) length = remaining
-
-  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
-    throw new RangeError('attempt to write outside buffer bounds')
-  }
-
-  if (!encoding) encoding = 'utf8'
-
-  var loweredCase = false
-  for (;;) {
-    switch (encoding) {
-      case 'hex':
-        return hexWrite(this, string, offset, length)
-
-      case 'utf8':
-      case 'utf-8':
-        return utf8Write(this, string, offset, length)
-
-      case 'ascii':
-        return asciiWrite(this, string, offset, length)
-
-      case 'binary':
-        return binaryWrite(this, string, offset, length)
-
-      case 'base64':
-        // Warning: maxLength not taken into account in base64Write
-        return base64Write(this, string, offset, length)
-
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return ucs2Write(this, string, offset, length)
-
-      default:
-        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
-        encoding = ('' + encoding).toLowerCase()
-        loweredCase = true
-    }
-  }
-}
-
-Buffer.prototype.toJSON = function toJSON () {
-  return {
-    type: 'Buffer',
-    data: Array.prototype.slice.call(this._arr || this, 0)
-  }
-}
-
-function base64Slice (buf, start, end) {
-  if (start === 0 && end === buf.length) {
-    return base64.fromByteArray(buf)
-  } else {
-    return base64.fromByteArray(buf.slice(start, end))
-  }
-}
-
-function utf8Slice (buf, start, end) {
-  end = Math.min(buf.length, end)
-  var res = []
-
-  var i = start
-  while (i < end) {
-    var firstByte = buf[i]
-    var codePoint = null
-    var bytesPerSequence = (firstByte > 0xEF) ? 4
-      : (firstByte > 0xDF) ? 3
-      : (firstByte > 0xBF) ? 2
-      : 1
-
-    if (i + bytesPerSequence <= end) {
-      var secondByte, thirdByte, fourthByte, tempCodePoint
-
-      switch (bytesPerSequence) {
-        case 1:
-          if (firstByte < 0x80) {
-            codePoint = firstByte
-          }
-          break
-        case 2:
-          secondByte = buf[i + 1]
-          if ((secondByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
-            if (tempCodePoint > 0x7F) {
-              codePoint = tempCodePoint
-            }
-          }
-          break
-        case 3:
-          secondByte = buf[i + 1]
-          thirdByte = buf[i + 2]
-          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
-            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
-              codePoint = tempCodePoint
-            }
-          }
-          break
-        case 4:
-          secondByte = buf[i + 1]
-          thirdByte = buf[i + 2]
-          fourthByte = buf[i + 3]
-          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
-            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
-              codePoint = tempCodePoint
-            }
-          }
-      }
-    }
-
-    if (codePoint === null) {
-      // we did not generate a valid codePoint so insert a
-      // replacement char (U+FFFD) and advance only 1 byte
-      codePoint = 0xFFFD
-      bytesPerSequence = 1
-    } else if (codePoint > 0xFFFF) {
-      // encode to utf16 (surrogate pair dance)
-      codePoint -= 0x10000
-      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
-      codePoint = 0xDC00 | codePoint & 0x3FF
-    }
-
-    res.push(codePoint)
-    i += bytesPerSequence
-  }
-
-  return decodeCodePointsArray(res)
-}
-
-// Based on http://stackoverflow.com/a/22747272/680742, the browser with
-// the lowest limit is Chrome, with 0x10000 args.
-// We go 1 magnitude less, for safety
-var MAX_ARGUMENTS_LENGTH = 0x1000
-
-function decodeCodePointsArray (codePoints) {
-  var len = codePoints.length
-  if (len <= MAX_ARGUMENTS_LENGTH) {
-    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
-  }
-
-  // Decode in chunks to avoid "call stack size exceeded".
-  var res = ''
-  var i = 0
-  while (i < len) {
-    res += String.fromCharCode.apply(
-      String,
-      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
-    )
-  }
-  return res
-}
-
-function asciiSlice (buf, start, end) {
-  var ret = ''
-  end = Math.min(buf.length, end)
-
-  for (var i = start; i < end; i++) {
-    ret += String.fromCharCode(buf[i] & 0x7F)
-  }
-  return ret
-}
-
-function binarySlice (buf, start, end) {
-  var ret = ''
-  end = Math.min(buf.length, end)
-
-  for (var i = start; i < end; i++) {
-    ret += String.fromCharCode(buf[i])
-  }
-  return ret
-}
-
-function hexSlice (buf, start, end) {
-  var len = buf.length
-
-  if (!start || start < 0) start = 0
-  if (!end || end < 0 || end > len) end = len
-
-  var out = ''
-  for (var i = start; i < end; i++) {
-    out += toHex(buf[i])
-  }
-  return out
-}
-
-function utf16leSlice (buf, start, end) {
-  var bytes = buf.slice(start, end)
-  var res = ''
-  for (var i = 0; i < bytes.length; i += 2) {
-    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
-  }
-  return res
-}
-
-Buffer.prototype.slice = function slice (start, end) {
-  var len = this.length
-  start = ~~start
-  end = end === undefined ? len : ~~end
-
-  if (start < 0) {
-    start += len
-    if (start < 0) start = 0
-  } else if (start > len) {
-    start = len
-  }
-
-  if (end < 0) {
-    end += len
-    if (end < 0) end = 0
-  } else if (end > len) {
-    end = len
-  }
-
-  if (end < start) end = start
-
-  var newBuf
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    newBuf = Buffer._augment(this.subarray(start, end))
-  } else {
-    var sliceLen = end - start
-    newBuf = new Buffer(sliceLen, undefined)
-    for (var i = 0; i < sliceLen; i++) {
-      newBuf[i] = this[i + start]
-    }
-  }
-
-  if (newBuf.length) newBuf.parent = this.parent || this
-
-  return newBuf
-}
-
-/*
- * Need to make sure that buffer isn't trying to write out of bounds.
- */
-function checkOffset (offset, ext, length) {
-  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
-  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
-}
-
-Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
-
-  var val = this[offset]
-  var mul = 1
-  var i = 0
-  while (++i < byteLength && (mul *= 0x100)) {
-    val += this[offset + i] * mul
-  }
-
-  return val
-}
-
-Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) {
-    checkOffset(offset, byteLength, this.length)
-  }
-
-  var val = this[offset + --byteLength]
-  var mul = 1
-  while (byteLength > 0 && (mul *= 0x100)) {
-    val += this[offset + --byteLength] * mul
-  }
-
-  return val
-}
-
-Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 1, this.length)
-  return this[offset]
-}
-
-Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  return this[offset] | (this[offset + 1] << 8)
-}
-
-Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  return (this[offset] << 8) | this[offset + 1]
-}
-
-Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-
-  return ((this[offset]) |
-      (this[offset + 1] << 8) |
-      (this[offset + 2] << 16)) +
-      (this[offset + 3] * 0x1000000)
-}
-
-Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-
-  return (this[offset] * 0x1000000) +
-    ((this[offset + 1] << 16) |
-    (this[offset + 2] << 8) |
-    this[offset + 3])
-}
-
-Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
-
-  var val = this[offset]
-  var mul = 1
-  var i = 0
-  while (++i < byteLength && (mul *= 0x100)) {
-    val += this[offset + i] * mul
-  }
-  mul *= 0x80
-
-  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
-
-  return val
-}
-
-Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
-
-  var i = byteLength
-  var mul = 1
-  var val = this[offset + --i]
-  while (i > 0 && (mul *= 0x100)) {
-    val += this[offset + --i] * mul
-  }
-  mul *= 0x80
-
-  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
-
-  return val
-}
-
-Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 1, this.length)
-  if (!(this[offset] & 0x80)) return (this[offset])
-  return ((0xff - this[offset] + 1) * -1)
-}
-
-Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  var val = this[offset] | (this[offset + 1] << 8)
-  return (val & 0x8000) ? val | 0xFFFF0000 : val
-}
-
-Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  var val = this[offset + 1] | (this[offset] << 8)
-  return (val & 0x8000) ? val | 0xFFFF0000 : val
-}
-
-Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-
-  return (this[offset]) |
-    (this[offset + 1] << 8) |
-    (this[offset + 2] << 16) |
-    (this[offset + 3] << 24)
-}
-
-Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-
-  return (this[offset] << 24) |
-    (this[offset + 1] << 16) |
-    (this[offset + 2] << 8) |
-    (this[offset + 3])
-}
-
-Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-  return ieee754.read(this, offset, true, 23, 4)
-}
-
-Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-  return ieee754.read(this, offset, false, 23, 4)
-}
-
-Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 8, this.length)
-  return ieee754.read(this, offset, true, 52, 8)
-}
-
-Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 8, this.length)
-  return ieee754.read(this, offset, false, 52, 8)
-}
-
-function checkInt (buf, value, offset, ext, max, min) {
-  if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')
-  if (value > max || value < min) throw new RangeError('value is out of bounds')
-  if (offset + ext > buf.length) throw new RangeError('index out of range')
-}
-
-Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)
-
-  var mul = 1
-  var i = 0
-  this[offset] = value & 0xFF
-  while (++i < byteLength && (mul *= 0x100)) {
-    this[offset + i] = (value / mul) & 0xFF
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)
-
-  var i = byteLength - 1
-  var mul = 1
-  this[offset + i] = value & 0xFF
-  while (--i >= 0 && (mul *= 0x100)) {
-    this[offset + i] = (value / mul) & 0xFF
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
-  this[offset] = (value & 0xff)
-  return offset + 1
-}
-
-function objectWriteUInt16 (buf, value, offset, littleEndian) {
-  if (value < 0) value = 0xffff + value + 1
-  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {
-    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
-      (littleEndian ? i : 1 - i) * 8
-  }
-}
-
-Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value & 0xff)
-    this[offset + 1] = (value >>> 8)
-  } else {
-    objectWriteUInt16(this, value, offset, true)
-  }
-  return offset + 2
-}
-
-Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 8)
-    this[offset + 1] = (value & 0xff)
-  } else {
-    objectWriteUInt16(this, value, offset, false)
-  }
-  return offset + 2
-}
-
-function objectWriteUInt32 (buf, value, offset, littleEndian) {
-  if (value < 0) value = 0xffffffff + value + 1
-  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {
-    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
-  }
-}
-
-Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset + 3] = (value >>> 24)
-    this[offset + 2] = (value >>> 16)
-    this[offset + 1] = (value >>> 8)
-    this[offset] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, true)
-  }
-  return offset + 4
-}
-
-Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 24)
-    this[offset + 1] = (value >>> 16)
-    this[offset + 2] = (value >>> 8)
-    this[offset + 3] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, false)
-  }
-  return offset + 4
-}
-
-Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) {
-    var limit = Math.pow(2, 8 * byteLength - 1)
-
-    checkInt(this, value, offset, byteLength, limit - 1, -limit)
-  }
-
-  var i = 0
-  var mul = 1
-  var sub = value < 0 ? 1 : 0
-  this[offset] = value & 0xFF
-  while (++i < byteLength && (mul *= 0x100)) {
-    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) {
-    var limit = Math.pow(2, 8 * byteLength - 1)
-
-    checkInt(this, value, offset, byteLength, limit - 1, -limit)
-  }
-
-  var i = byteLength - 1
-  var mul = 1
-  var sub = value < 0 ? 1 : 0
-  this[offset + i] = value & 0xFF
-  while (--i >= 0 && (mul *= 0x100)) {
-    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
-  if (value < 0) value = 0xff + value + 1
-  this[offset] = (value & 0xff)
-  return offset + 1
-}
-
-Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value & 0xff)
-    this[offset + 1] = (value >>> 8)
-  } else {
-    objectWriteUInt16(this, value, offset, true)
-  }
-  return offset + 2
-}
-
-Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 8)
-    this[offset + 1] = (value & 0xff)
-  } else {
-    objectWriteUInt16(this, value, offset, false)
-  }
-  return offset + 2
-}
-
-Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value & 0xff)
-    this[offset + 1] = (value >>> 8)
-    this[offset + 2] = (value >>> 16)
-    this[offset + 3] = (value >>> 24)
-  } else {
-    objectWriteUInt32(this, value, offset, true)
-  }
-  return offset + 4
-}
-
-Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
-  if (value < 0) value = 0xffffffff + value + 1
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 24)
-    this[offset + 1] = (value >>> 16)
-    this[offset + 2] = (value >>> 8)
-    this[offset + 3] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, false)
-  }
-  return offset + 4
-}
-
-function checkIEEE754 (buf, value, offset, ext, max, min) {
-  if (value > max || value < min) throw new RangeError('value is out of bounds')
-  if (offset + ext > buf.length) throw new RangeError('index out of range')
-  if (offset < 0) throw new RangeError('index out of range')
-}
-
-function writeFloat (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 23, 4)
-  return offset + 4
-}
-
-Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, true, noAssert)
-}
-
-Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, false, noAssert)
-}
-
-function writeDouble (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 52, 8)
-  return offset + 8
-}
-
-Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, true, noAssert)
-}
-
-Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, false, noAssert)
-}
-
-// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
-Buffer.prototype.copy = function copy (target, targetStart, start, end) {
-  if (!start) start = 0
-  if (!end && end !== 0) end = this.length
-  if (targetStart >= target.length) targetStart = target.length
-  if (!targetStart) targetStart = 0
-  if (end > 0 && end < start) end = start
-
-  // Copy 0 bytes; we're done
-  if (end === start) return 0
-  if (target.length === 0 || this.length === 0) return 0
-
-  // Fatal error conditions
-  if (targetStart < 0) {
-    throw new RangeError('targetStart out of bounds')
-  }
-  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
-  if (end < 0) throw new RangeError('sourceEnd out of bounds')
-
-  // Are we oob?
-  if (end > this.length) end = this.length
-  if (target.length - targetStart < end - start) {
-    end = target.length - targetStart + start
-  }
-
-  var len = end - start
-  var i
-
-  if (this === target && start < targetStart && targetStart < end) {
-    // descending copy from end
-    for (i = len - 1; i >= 0; i--) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
-    // ascending copy from start
-    for (i = 0; i < len; i++) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else {
-    target._set(this.subarray(start, start + len), targetStart)
-  }
-
-  return len
-}
-
-// fill(value, start=0, end=buffer.length)
-Buffer.prototype.fill = function fill (value, start, end) {
-  if (!value) value = 0
-  if (!start) start = 0
-  if (!end) end = this.length
-
-  if (end < start) throw new RangeError('end < start')
-
-  // Fill 0 bytes; we're done
-  if (end === start) return
-  if (this.length === 0) return
-
-  if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')
-  if (end < 0 || end > this.length) throw new RangeError('end out of bounds')
-
-  var i
-  if (typeof value === 'number') {
-    for (i = start; i < end; i++) {
-      this[i] = value
-    }
-  } else {
-    var bytes = utf8ToBytes(value.toString())
-    var len = bytes.length
-    for (i = start; i < end; i++) {
-      this[i] = bytes[i % len]
-    }
-  }
-
-  return this
-}
-
-/**
- * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.
- * Added in Node 0.12. Only available in browsers that support ArrayBuffer.
- */
-Buffer.prototype.toArrayBuffer = function toArrayBuffer () {
-  if (typeof Uint8Array !== 'undefined') {
-    if (Buffer.TYPED_ARRAY_SUPPORT) {
-      return (new Buffer(this)).buffer
-    } else {
-      var buf = new Uint8Array(this.length)
-      for (var i = 0, len = buf.length; i < len; i += 1) {
-        buf[i] = this[i]
-      }
-      return buf.buffer
-    }
-  } else {
-    throw new TypeError('Buffer.toArrayBuffer not supported in this browser')
-  }
-}
-
-// HELPER FUNCTIONS
-// ================
-
-var BP = Buffer.prototype
-
-/**
- * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods
- */
-Buffer._augment = function _augment (arr) {
-  arr.constructor = Buffer
-  arr._isBuffer = true
-
-  // save reference to original Uint8Array set method before overwriting
-  arr._set = arr.set
-
-  // deprecated
-  arr.get = BP.get
-  arr.set = BP.set
-
-  arr.write = BP.write
-  arr.toString = BP.toString
-  arr.toLocaleString = BP.toString
-  arr.toJSON = BP.toJSON
-  arr.equals = BP.equals
-  arr.compare = BP.compare
-  arr.indexOf = BP.indexOf
-  arr.copy = BP.copy
-  arr.slice = BP.slice
-  arr.readUIntLE = BP.readUIntLE
-  arr.readUIntBE = BP.readUIntBE
-  arr.readUInt8 = BP.readUInt8
-  arr.readUInt16LE = BP.readUInt16LE
-  arr.readUInt16BE = BP.readUInt16BE
-  arr.readUInt32LE = BP.readUInt32LE
-  arr.readUInt32BE = BP.readUInt32BE
-  arr.readIntLE = BP.readIntLE
-  arr.readIntBE = BP.readIntBE
-  arr.readInt8 = BP.readInt8
-  arr.readInt16LE = BP.readInt16LE
-  arr.readInt16BE = BP.readInt16BE
-  arr.readInt32LE = BP.readInt32LE
-  arr.readInt32BE = BP.readInt32BE
-  arr.readFloatLE = BP.readFloatLE
-  arr.readFloatBE = BP.readFloatBE
-  arr.readDoubleLE = BP.readDoubleLE
-  arr.readDoubleBE = BP.readDoubleBE
-  arr.writeUInt8 = BP.writeUInt8
-  arr.writeUIntLE = BP.writeUIntLE
-  arr.writeUIntBE = BP.writeUIntBE
-  arr.writeUInt16LE = BP.writeUInt16LE
-  arr.writeUInt16BE = BP.writeUInt16BE
-  arr.writeUInt32LE = BP.writeUInt32LE
-  arr.writeUInt32BE = BP.writeUInt32BE
-  arr.writeIntLE = BP.writeIntLE
-  arr.writeIntBE = BP.writeIntBE
-  arr.writeInt8 = BP.writeInt8
-  arr.writeInt16LE = BP.writeInt16LE
-  arr.writeInt16BE = BP.writeInt16BE
-  arr.writeInt32LE = BP.writeInt32LE
-  arr.writeInt32BE = BP.writeInt32BE
-  arr.writeFloatLE = BP.writeFloatLE
-  arr.writeFloatBE = BP.writeFloatBE
-  arr.writeDoubleLE = BP.writeDoubleLE
-  arr.writeDoubleBE = BP.writeDoubleBE
-  arr.fill = BP.fill
-  arr.inspect = BP.inspect
-  arr.toArrayBuffer = BP.toArrayBuffer
-
-  return arr
-}
-
-var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
-
-function base64clean (str) {
-  // Node strips out invalid characters like \n and \t from the string, base64-js does not
-  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
-  // Node converts strings with length < 2 to ''
-  if (str.length < 2) return ''
-  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
-  while (str.length % 4 !== 0) {
-    str = str + '='
-  }
-  return str
-}
-
-function stringtrim (str) {
-  if (str.trim) return str.trim()
-  return str.replace(/^\s+|\s+$/g, '')
-}
-
-function toHex (n) {
-  if (n < 16) return '0' + n.toString(16)
-  return n.toString(16)
-}
-
-function utf8ToBytes (string, units) {
-  units = units || Infinity
-  var codePoint
-  var length = string.length
-  var leadSurrogate = null
-  var bytes = []
-
-  for (var i = 0; i < length; i++) {
-    codePoint = string.charCodeAt(i)
-
-    // is surrogate component
-    if (codePoint > 0xD7FF && codePoint < 0xE000) {
-      // last char was a lead
-      if (!leadSurrogate) {
-        // no lead yet
-        if (codePoint > 0xDBFF) {
-          // unexpected trail
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        } else if (i + 1 === length) {
-          // unpaired lead
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        }
-
-        // valid lead
-        leadSurrogate = codePoint
-
-        continue
-      }
-
-      // 2 leads in a row
-      if (codePoint < 0xDC00) {
-        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-        leadSurrogate = codePoint
-        continue
-      }
-
-      // valid surrogate pair
-      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
-    } else if (leadSurrogate) {
-      // valid bmp char, but last char was a lead
-      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-    }
-
-    leadSurrogate = null
-
-    // encode utf8
-    if (codePoint < 0x80) {
-      if ((units -= 1) < 0) break
-      bytes.push(codePoint)
-    } else if (codePoint < 0x800) {
-      if ((units -= 2) < 0) break
-      bytes.push(
-        codePoint >> 0x6 | 0xC0,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x10000) {
-      if ((units -= 3) < 0) break
-      bytes.push(
-        codePoint >> 0xC | 0xE0,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x110000) {
-      if ((units -= 4) < 0) break
-      bytes.push(
-        codePoint >> 0x12 | 0xF0,
-        codePoint >> 0xC & 0x3F | 0x80,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else {
-      throw new Error('Invalid code point')
-    }
-  }
-
-  return bytes
-}
-
-function asciiToBytes (str) {
-  var byteArray = []
-  for (var i = 0; i < str.length; i++) {
-    // Node's code seems to be doing this and not & 0x7F..
-    byteArray.push(str.charCodeAt(i) & 0xFF)
-  }
-  return byteArray
-}
-
-function utf16leToBytes (str, units) {
-  var c, hi, lo
-  var byteArray = []
-  for (var i = 0; i < str.length; i++) {
-    if ((units -= 2) < 0) break
-
-    c = str.charCodeAt(i)
-    hi = c >> 8
-    lo = c % 256
-    byteArray.push(lo)
-    byteArray.push(hi)
-  }
-
-  return byteArray
-}
-
-function base64ToBytes (str) {
-  return base64.toByteArray(base64clean(str))
-}
-
-function blitBuffer (src, dst, offset, length) {
-  for (var i = 0; i < length; i++) {
-    if ((i + offset >= dst.length) || (i >= src.length)) break
-    dst[i + offset] = src[i]
-  }
-  return i
-}
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"base64-js":7,"ieee754":39,"isarray":9}],9:[function(require,module,exports){
-var toString = {}.toString;
-
-module.exports = Array.isArray || function (arr) {
-  return toString.call(arr) == '[object Array]';
-};
-
-},{}],10:[function(require,module,exports){
-module.exports = require('./lib/chai');
-
-},{"./lib/chai":11}],11:[function(require,module,exports){
-/*!
- * chai
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-var used = []
-  , exports = module.exports = {};
-
-/*!
- * Chai version
- */
-
-exports.version = '1.9.2';
-
-/*!
- * Assertion Error
- */
-
-exports.AssertionError = require('assertion-error');
-
-/*!
- * Utils for plugins (not exported)
- */
-
-var util = require('./chai/utils');
-
-/**
- * # .use(function)
- *
- * Provides a way to extend the internals of Chai
- *
- * @param {Function}
- * @returns {this} for chaining
- * @api public
- */
-
-exports.use = function (fn) {
-  if (!~used.indexOf(fn)) {
-    fn(this, util);
-    used.push(fn);
-  }
-
-  return this;
-};
-
-/*!
- * Configuration
- */
-
-var config = require('./chai/config');
-exports.config = config;
-
-/*!
- * Primary `Assertion` prototype
- */
-
-var assertion = require('./chai/assertion');
-exports.use(assertion);
-
-/*!
- * Core Assertions
- */
-
-var core = require('./chai/core/assertions');
-exports.use(core);
-
-/*!
- * Expect interface
- */
-
-var expect = require('./chai/interface/expect');
-exports.use(expect);
-
-/*!
- * Should interface
- */
-
-var should = require('./chai/interface/should');
-exports.use(should);
-
-/*!
- * Assert interface
- */
-
-var assert = require('./chai/interface/assert');
-exports.use(assert);
-
-},{"./chai/assertion":12,"./chai/config":13,"./chai/core/assertions":14,"./chai/interface/assert":15,"./chai/interface/expect":16,"./chai/interface/should":17,"./chai/utils":28,"assertion-error":5}],12:[function(require,module,exports){
-/*!
- * chai
- * http://chaijs.com
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-var config = require('./config');
-
-module.exports = function (_chai, util) {
-  /*!
-   * Module dependencies.
-   */
-
-  var AssertionError = _chai.AssertionError
-    , flag = util.flag;
-
-  /*!
-   * Module export.
-   */
-
-  _chai.Assertion = Assertion;
-
-  /*!
-   * Assertion Constructor
-   *
-   * Creates object for chaining.
-   *
-   * @api private
-   */
-
-  function Assertion (obj, msg, stack) {
-    flag(this, 'ssfi', stack || arguments.callee);
-    flag(this, 'object', obj);
-    flag(this, 'message', msg);
-  }
-
-  Object.defineProperty(Assertion, 'includeStack', {
-    get: function() {
-      console.warn('Assertion.includeStack is deprecated, use chai.config.includeStack instead.');
-      return config.includeStack;
-    },
-    set: function(value) {
-      console.warn('Assertion.includeStack is deprecated, use chai.config.includeStack instead.');
-      config.includeStack = value;
-    }
-  });
-
-  Object.defineProperty(Assertion, 'showDiff', {
-    get: function() {
-      console.warn('Assertion.showDiff is deprecated, use chai.config.showDiff instead.');
-      return config.showDiff;
-    },
-    set: function(value) {
-      console.warn('Assertion.showDiff is deprecated, use chai.config.showDiff instead.');
-      config.showDiff = value;
-    }
-  });
-
-  Assertion.addProperty = function (name, fn) {
-    util.addProperty(this.prototype, name, fn);
-  };
-
-  Assertion.addMethod = function (name, fn) {
-    util.addMethod(this.prototype, name, fn);
-  };
-
-  Assertion.addChainableMethod = function (name, fn, chainingBehavior) {
-    util.addChainableMethod(this.prototype, name, fn, chainingBehavior);
-  };
-
-  Assertion.overwriteProperty = function (name, fn) {
-    util.overwriteProperty(this.prototype, name, fn);
-  };
-
-  Assertion.overwriteMethod = function (name, fn) {
-    util.overwriteMethod(this.prototype, name, fn);
-  };
-
-  Assertion.overwriteChainableMethod = function (name, fn, chainingBehavior) {
-    util.overwriteChainableMethod(this.prototype, name, fn, chainingBehavior);
-  };
-
-  /*!
-   * ### .assert(expression, message, negateMessage, expected, actual)
-   *
-   * Executes an expression and check expectations. Throws AssertionError for reporting if test doesn't pass.
-   *
-   * @name assert
-   * @param {Philosophical} expression to be tested
-   * @param {String or Function} message or function that returns message to display if fails
-   * @param {String or Function} negatedMessage or function that returns negatedMessage to display if negated expression fails
-   * @param {Mixed} expected value (remember to check for negation)
-   * @param {Mixed} actual (optional) will default to `this.obj`
-   * @api private
-   */
-
-  Assertion.prototype.assert = function (expr, msg, negateMsg, expected, _actual, showDiff) {
-    var ok = util.test(this, arguments);
-    if (true !== showDiff) showDiff = false;
-    if (true !== config.showDiff) showDiff = false;
-
-    if (!ok) {
-      var msg = util.getMessage(this, arguments)
-        , actual = util.getActual(this, arguments);
-      throw new AssertionError(msg, {
-          actual: actual
-        , expected: expected
-        , showDiff: showDiff
-      }, (config.includeStack) ? this.assert : flag(this, 'ssfi'));
-    }
-  };
-
-  /*!
-   * ### ._obj
-   *
-   * Quick reference to stored `actual` value for plugin developers.
-   *
-   * @api private
-   */
-
-  Object.defineProperty(Assertion.prototype, '_obj',
-    { get: function () {
-        return flag(this, 'object');
-      }
-    , set: function (val) {
-        flag(this, 'object', val);
-      }
-  });
-};
-
-},{"./config":13}],13:[function(require,module,exports){
-module.exports = {
-
-  /**
-   * ### config.includeStack
-   *
-   * User configurable property, influences whether stack trace
-   * is included in Assertion error message. Default of false
-   * suppresses stack trace in the error message.
-   *
-   *     chai.config.includeStack = true;  // enable stack on error
-   *
-   * @param {Boolean}
-   * @api public
-   */
-
-   includeStack: false,
-
-  /**
-   * ### config.showDiff
-   *
-   * User configurable property, influences whether or not
-   * the `showDiff` flag should be included in the thrown
-   * AssertionErrors. `false` will always be `false`; `true`
-   * will be true when the assertion has requested a diff
-   * be shown.
-   *
-   * @param {Boolean}
-   * @api public
-   */
-
-  showDiff: true,
-
-  /**
-   * ### config.truncateThreshold
-   *
-   * User configurable property, sets length threshold for actual and
-   * expected values in assertion errors. If this threshold is exceeded,
-   * the value is truncated.
-   *
-   * Set it to zero if you want to disable truncating altogether.
-   *
-   *     chai.config.truncateThreshold = 0;  // disable truncating
-   *
-   * @param {Number}
-   * @api public
-   */
-
-  truncateThreshold: 40
-
-};
-
-},{}],14:[function(require,module,exports){
-/*!
- * chai
- * http://chaijs.com
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-module.exports = function (chai, _) {
-  var Assertion = chai.Assertion
-    , toString = Object.prototype.toString
-    , flag = _.flag;
-
-  /**
-   * ### Language Chains
-   *
-   * The following are provided as chainable getters to
-   * improve the readability of your assertions. They
-   * do not provide testing capabilities unless they
-   * have been overwritten by a plugin.
-   *
-   * **Chains**
-   *
-   * - to
-   * - be
-   * - been
-   * - is
-   * - that
-   * - and
-   * - has
-   * - have
-   * - with
-   * - at
-   * - of
-   * - same
-   *
-   * @name language chains
-   * @api public
-   */
-
-  [ 'to', 'be', 'been'
-  , 'is', 'and', 'has', 'have'
-  , 'with', 'that', 'at'
-  , 'of', 'same' ].forEach(function (chain) {
-    Assertion.addProperty(chain, function () {
-      return this;
-    });
-  });
-
-  /**
-   * ### .not
-   *
-   * Negates any of assertions following in the chain.
-   *
-   *     expect(foo).to.not.equal('bar');
-   *     expect(goodFn).to.not.throw(Error);
-   *     expect({ foo: 'baz' }).to.have.property('foo')
-   *       .and.not.equal('bar');
-   *
-   * @name not
-   * @api public
-   */
-
-  Assertion.addProperty('not', function () {
-    flag(this, 'negate', true);
-  });
-
-  /**
-   * ### .deep
-   *
-   * Sets the `deep` flag, later used by the `equal` and
-   * `property` assertions.
-   *
-   *     expect(foo).to.deep.equal({ bar: 'baz' });
-   *     expect({ foo: { bar: { baz: 'quux' } } })
-   *       .to.have.deep.property('foo.bar.baz', 'quux');
-   *
-   * @name deep
-   * @api public
-   */
-
-  Assertion.addProperty('deep', function () {
-    flag(this, 'deep', true);
-  });
-
-  /**
-   * ### .a(type)
-   *
-   * The `a` and `an` assertions are aliases that can be
-   * used either as language chains or to assert a value's
-   * type.
-   *
-   *     // typeof
-   *     expect('test').to.be.a('string');
-   *     expect({ foo: 'bar' }).to.be.an('object');
-   *     expect(null).to.be.a('null');
-   *     expect(undefined).to.be.an('undefined');
-   *
-   *     // language chain
-   *     expect(foo).to.be.an.instanceof(Foo);
-   *
-   * @name a
-   * @alias an
-   * @param {String} type
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function an (type, msg) {
-    if (msg) flag(this, 'message', msg);
-    type = type.toLowerCase();
-    var obj = flag(this, 'object')
-      , article = ~[ 'a', 'e', 'i', 'o', 'u' ].indexOf(type.charAt(0)) ? 'an ' : 'a ';
-
-    this.assert(
-        type === _.type(obj)
-      , 'expected #{this} to be ' + article + type
-      , 'expected #{this} not to be ' + article + type
-    );
-  }
-
-  Assertion.addChainableMethod('an', an);
-  Assertion.addChainableMethod('a', an);
-
-  /**
-   * ### .include(value)
-   *
-   * The `include` and `contain` assertions can be used as either property
-   * based language chains or as methods to assert the inclusion of an object
-   * in an array or a substring in a string. When used as language chains,
-   * they toggle the `contain` flag for the `keys` assertion.
-   *
-   *     expect([1,2,3]).to.include(2);
-   *     expect('foobar').to.contain('foo');
-   *     expect({ foo: 'bar', hello: 'universe' }).to.include.keys('foo');
-   *
-   * @name include
-   * @alias contain
-   * @param {Object|String|Number} obj
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function includeChainingBehavior () {
-    flag(this, 'contains', true);
-  }
-
-  function include (val, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    var expected = false;
-    if (_.type(obj) === 'array' && _.type(val) === 'object') {
-      for (var i in obj) {
-        if (_.eql(obj[i], val)) {
-          expected = true;
-          break;
-        }
-      }
-    } else if (_.type(val) === 'object') {
-      if (!flag(this, 'negate')) {
-        for (var k in val) new Assertion(obj).property(k, val[k]);
-        return;
-      }
-      var subset = {}
-      for (var k in val) subset[k] = obj[k]
-      expected = _.eql(subset, val);
-    } else {
-      expected = obj && ~obj.indexOf(val)
-    }
-    this.assert(
-        expected
-      , 'expected #{this} to include ' + _.inspect(val)
-      , 'expected #{this} to not include ' + _.inspect(val));
-  }
-
-  Assertion.addChainableMethod('include', include, includeChainingBehavior);
-  Assertion.addChainableMethod('contain', include, includeChainingBehavior);
-
-  /**
-   * ### .ok
-   *
-   * Asserts that the target is truthy.
-   *
-   *     expect('everthing').to.be.ok;
-   *     expect(1).to.be.ok;
-   *     expect(false).to.not.be.ok;
-   *     expect(undefined).to.not.be.ok;
-   *     expect(null).to.not.be.ok;
-   *
-   * @name ok
-   * @api public
-   */
-
-  Assertion.addProperty('ok', function () {
-    this.assert(
-        flag(this, 'object')
-      , 'expected #{this} to be truthy'
-      , 'expected #{this} to be falsy');
-  });
-
-  /**
-   * ### .true
-   *
-   * Asserts that the target is `true`.
-   *
-   *     expect(true).to.be.true;
-   *     expect(1).to.not.be.true;
-   *
-   * @name true
-   * @api public
-   */
-
-  Assertion.addProperty('true', function () {
-    this.assert(
-        true === flag(this, 'object')
-      , 'expected #{this} to be true'
-      , 'expected #{this} to be false'
-      , this.negate ? false : true
-    );
-  });
-
-  /**
-   * ### .false
-   *
-   * Asserts that the target is `false`.
-   *
-   *     expect(false).to.be.false;
-   *     expect(0).to.not.be.false;
-   *
-   * @name false
-   * @api public
-   */
-
-  Assertion.addProperty('false', function () {
-    this.assert(
-        false === flag(this, 'object')
-      , 'expected #{this} to be false'
-      , 'expected #{this} to be true'
-      , this.negate ? true : false
-    );
-  });
-
-  /**
-   * ### .null
-   *
-   * Asserts that the target is `null`.
-   *
-   *     expect(null).to.be.null;
-   *     expect(undefined).not.to.be.null;
-   *
-   * @name null
-   * @api public
-   */
-
-  Assertion.addProperty('null', function () {
-    this.assert(
-        null === flag(this, 'object')
-      , 'expected #{this} to be null'
-      , 'expected #{this} not to be null'
-    );
-  });
-
-  /**
-   * ### .undefined
-   *
-   * Asserts that the target is `undefined`.
-   *
-   *     expect(undefined).to.be.undefined;
-   *     expect(null).to.not.be.undefined;
-   *
-   * @name undefined
-   * @api public
-   */
-
-  Assertion.addProperty('undefined', function () {
-    this.assert(
-        undefined === flag(this, 'object')
-      , 'expected #{this} to be undefined'
-      , 'expected #{this} not to be undefined'
-    );
-  });
-
-  /**
-   * ### .exist
-   *
-   * Asserts that the target is neither `null` nor `undefined`.
-   *
-   *     var foo = 'hi'
-   *       , bar = null
-   *       , baz;
-   *
-   *     expect(foo).to.exist;
-   *     expect(bar).to.not.exist;
-   *     expect(baz).to.not.exist;
-   *
-   * @name exist
-   * @api public
-   */
-
-  Assertion.addProperty('exist', function () {
-    this.assert(
-        null != flag(this, 'object')
-      , 'expected #{this} to exist'
-      , 'expected #{this} to not exist'
-    );
-  });
-
-
-  /**
-   * ### .empty
-   *
-   * Asserts that the target's length is `0`. For arrays, it checks
-   * the `length` property. For objects, it gets the count of
-   * enumerable keys.
-   *
-   *     expect([]).to.be.empty;
-   *     expect('').to.be.empty;
-   *     expect({}).to.be.empty;
-   *
-   * @name empty
-   * @api public
-   */
-
-  Assertion.addProperty('empty', function () {
-    var obj = flag(this, 'object')
-      , expected = obj;
-
-    if (Array.isArray(obj) || 'string' === typeof object) {
-      expected = obj.length;
-    } else if (typeof obj === 'object') {
-      expected = Object.keys(obj).length;
-    }
-
-    this.assert(
-        !expected
-      , 'expected #{this} to be empty'
-      , 'expected #{this} not to be empty'
-    );
-  });
-
-  /**
-   * ### .arguments
-   *
-   * Asserts that the target is an arguments object.
-   *
-   *     function test () {
-   *       expect(arguments).to.be.arguments;
-   *     }
-   *
-   * @name arguments
-   * @alias Arguments
-   * @api public
-   */
-
-  function checkArguments () {
-    var obj = flag(this, 'object')
-      , type = Object.prototype.toString.call(obj);
-    this.assert(
-        '[object Arguments]' === type
-      , 'expected #{this} to be arguments but got ' + type
-      , 'expected #{this} to not be arguments'
-    );
-  }
-
-  Assertion.addProperty('arguments', checkArguments);
-  Assertion.addProperty('Arguments', checkArguments);
-
-  /**
-   * ### .equal(value)
-   *
-   * Asserts that the target is strictly equal (`===`) to `value`.
-   * Alternately, if the `deep` flag is set, asserts that
-   * the target is deeply equal to `value`.
-   *
-   *     expect('hello').to.equal('hello');
-   *     expect(42).to.equal(42);
-   *     expect(1).to.not.equal(true);
-   *     expect({ foo: 'bar' }).to.not.equal({ foo: 'bar' });
-   *     expect({ foo: 'bar' }).to.deep.equal({ foo: 'bar' });
-   *
-   * @name equal
-   * @alias equals
-   * @alias eq
-   * @alias deep.equal
-   * @param {Mixed} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertEqual (val, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    if (flag(this, 'deep')) {
-      return this.eql(val);
-    } else {
-      this.assert(
-          val === obj
-        , 'expected #{this} to equal #{exp}'
-        , 'expected #{this} to not equal #{exp}'
-        , val
-        , this._obj
-        , true
-      );
-    }
-  }
-
-  Assertion.addMethod('equal', assertEqual);
-  Assertion.addMethod('equals', assertEqual);
-  Assertion.addMethod('eq', assertEqual);
-
-  /**
-   * ### .eql(value)
-   *
-   * Asserts that the target is deeply equal to `value`.
-   *
-   *     expect({ foo: 'bar' }).to.eql({ foo: 'bar' });
-   *     expect([ 1, 2, 3 ]).to.eql([ 1, 2, 3 ]);
-   *
-   * @name eql
-   * @alias eqls
-   * @param {Mixed} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertEql(obj, msg) {
-    if (msg) flag(this, 'message', msg);
-    this.assert(
-        _.eql(obj, flag(this, 'object'))
-      , 'expected #{this} to deeply equal #{exp}'
-      , 'expected #{this} to not deeply equal #{exp}'
-      , obj
-      , this._obj
-      , true
-    );
-  }
-
-  Assertion.addMethod('eql', assertEql);
-  Assertion.addMethod('eqls', assertEql);
-
-  /**
-   * ### .above(value)
-   *
-   * Asserts that the target is greater than `value`.
-   *
-   *     expect(10).to.be.above(5);
-   *
-   * Can also be used in conjunction with `length` to
-   * assert a minimum length. The benefit being a
-   * more informative error message than if the length
-   * was supplied directly.
-   *
-   *     expect('foo').to.have.length.above(2);
-   *     expect([ 1, 2, 3 ]).to.have.length.above(2);
-   *
-   * @name above
-   * @alias gt
-   * @alias greaterThan
-   * @param {Number} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertAbove (n, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    if (flag(this, 'doLength')) {
-      new Assertion(obj, msg).to.have.property('length');
-      var len = obj.length;
-      this.assert(
-          len > n
-        , 'expected #{this} to have a length above #{exp} but got #{act}'
-        , 'expected #{this} to not have a length above #{exp}'
-        , n
-        , len
-      );
-    } else {
-      this.assert(
-          obj > n
-        , 'expected #{this} to be above ' + n
-        , 'expected #{this} to be at most ' + n
-      );
-    }
-  }
-
-  Assertion.addMethod('above', assertAbove);
-  Assertion.addMethod('gt', assertAbove);
-  Assertion.addMethod('greaterThan', assertAbove);
-
-  /**
-   * ### .least(value)
-   *
-   * Asserts that the target is greater than or equal to `value`.
-   *
-   *     expect(10).to.be.at.least(10);
-   *
-   * Can also be used in conjunction with `length` to
-   * assert a minimum length. The benefit being a
-   * more informative error message than if the length
-   * was supplied directly.
-   *
-   *     expect('foo').to.have.length.of.at.least(2);
-   *     expect([ 1, 2, 3 ]).to.have.length.of.at.least(3);
-   *
-   * @name least
-   * @alias gte
-   * @param {Number} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertLeast (n, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    if (flag(this, 'doLength')) {
-      new Assertion(obj, msg).to.have.property('length');
-      var len = obj.length;
-      this.assert(
-          len >= n
-        , 'expected #{this} to have a length at least #{exp} but got #{act}'
-        , 'expected #{this} to have a length below #{exp}'
-        , n
-        , len
-      );
-    } else {
-      this.assert(
-          obj >= n
-        , 'expected #{this} to be at least ' + n
-        , 'expected #{this} to be below ' + n
-      );
-    }
-  }
-
-  Assertion.addMethod('least', assertLeast);
-  Assertion.addMethod('gte', assertLeast);
-
-  /**
-   * ### .below(value)
-   *
-   * Asserts that the target is less than `value`.
-   *
-   *     expect(5).to.be.below(10);
-   *
-   * Can also be used in conjunction with `length` to
-   * assert a maximum length. The benefit being a
-   * more informative error message than if the length
-   * was supplied directly.
-   *
-   *     expect('foo').to.have.length.below(4);
-   *     expect([ 1, 2, 3 ]).to.have.length.below(4);
-   *
-   * @name below
-   * @alias lt
-   * @alias lessThan
-   * @param {Number} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertBelow (n, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    if (flag(this, 'doLength')) {
-      new Assertion(obj, msg).to.have.property('length');
-      var len = obj.length;
-      this.assert(
-          len < n
-        , 'expected #{this} to have a length below #{exp} but got #{act}'
-        , 'expected #{this} to not have a length below #{exp}'
-        , n
-        , len
-      );
-    } else {
-      this.assert(
-          obj < n
-        , 'expected #{this} to be below ' + n
-        , 'expected #{this} to be at least ' + n
-      );
-    }
-  }
-
-  Assertion.addMethod('below', assertBelow);
-  Assertion.addMethod('lt', assertBelow);
-  Assertion.addMethod('lessThan', assertBelow);
-
-  /**
-   * ### .most(value)
-   *
-   * Asserts that the target is less than or equal to `value`.
-   *
-   *     expect(5).to.be.at.most(5);
-   *
-   * Can also be used in conjunction with `length` to
-   * assert a maximum length. The benefit being a
-   * more informative error message than if the length
-   * was supplied directly.
-   *
-   *     expect('foo').to.have.length.of.at.most(4);
-   *     expect([ 1, 2, 3 ]).to.have.length.of.at.most(3);
-   *
-   * @name most
-   * @alias lte
-   * @param {Number} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertMost (n, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    if (flag(this, 'doLength')) {
-      new Assertion(obj, msg).to.have.property('length');
-      var len = obj.length;
-      this.assert(
-          len <= n
-        , 'expected #{this} to have a length at most #{exp} but got #{act}'
-        , 'expected #{this} to have a length above #{exp}'
-        , n
-        , len
-      );
-    } else {
-      this.assert(
-          obj <= n
-        , 'expected #{this} to be at most ' + n
-        , 'expected #{this} to be above ' + n
-      );
-    }
-  }
-
-  Assertion.addMethod('most', assertMost);
-  Assertion.addMethod('lte', assertMost);
-
-  /**
-   * ### .within(start, finish)
-   *
-   * Asserts that the target is within a range.
-   *
-   *     expect(7).to.be.within(5,10);
-   *
-   * Can also be used in conjunction with `length` to
-   * assert a length range. The benefit being a
-   * more informative error message than if the length
-   * was supplied directly.
-   *
-   *     expect('foo').to.have.length.within(2,4);
-   *     expect([ 1, 2, 3 ]).to.have.length.within(2,4);
-   *
-   * @name within
-   * @param {Number} start lowerbound inclusive
-   * @param {Number} finish upperbound inclusive
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('within', function (start, finish, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object')
-      , range = start + '..' + finish;
-    if (flag(this, 'doLength')) {
-      new Assertion(obj, msg).to.have.property('length');
-      var len = obj.length;
-      this.assert(
-          len >= start && len <= finish
-        , 'expected #{this} to have a length within ' + range
-        , 'expected #{this} to not have a length within ' + range
-      );
-    } else {
-      this.assert(
-          obj >= start && obj <= finish
-        , 'expected #{this} to be within ' + range
-        , 'expected #{this} to not be within ' + range
-      );
-    }
-  });
-
-  /**
-   * ### .instanceof(constructor)
-   *
-   * Asserts that the target is an instance of `constructor`.
-   *
-   *     var Tea = function (name) { this.name = name; }
-   *       , Chai = new Tea('chai');
-   *
-   *     expect(Chai).to.be.an.instanceof(Tea);
-   *     expect([ 1, 2, 3 ]).to.be.instanceof(Array);
-   *
-   * @name instanceof
-   * @param {Constructor} constructor
-   * @param {String} message _optional_
-   * @alias instanceOf
-   * @api public
-   */
-
-  function assertInstanceOf (constructor, msg) {
-    if (msg) flag(this, 'message', msg);
-    var name = _.getName(constructor);
-    this.assert(
-        flag(this, 'object') instanceof constructor
-      , 'expected #{this} to be an instance of ' + name
-      , 'expected #{this} to not be an instance of ' + name
-    );
-  };
-
-  Assertion.addMethod('instanceof', assertInstanceOf);
-  Assertion.addMethod('instanceOf', assertInstanceOf);
-
-  /**
-   * ### .property(name, [value])
-   *
-   * Asserts that the target has a property `name`, optionally asserting that
-   * the value of that property is strictly equal to  `value`.
-   * If the `deep` flag is set, you can use dot- and bracket-notation for deep
-   * references into objects and arrays.
-   *
-   *     // simple referencing
-   *     var obj = { foo: 'bar' };
-   *     expect(obj).to.have.property('foo');
-   *     expect(obj).to.have.property('foo', 'bar');
-   *
-   *     // deep referencing
-   *     var deepObj = {
-   *         green: { tea: 'matcha' }
-   *       , teas: [ 'chai', 'matcha', { tea: 'konacha' } ]
-   *     };
-
-   *     expect(deepObj).to.have.deep.property('green.tea', 'matcha');
-   *     expect(deepObj).to.have.deep.property('teas[1]', 'matcha');
-   *     expect(deepObj).to.have.deep.property('teas[2].tea', 'konacha');
-   *
-   * You can also use an array as the starting point of a `deep.property`
-   * assertion, or traverse nested arrays.
-   *
-   *     var arr = [
-   *         [ 'chai', 'matcha', 'konacha' ]
-   *       , [ { tea: 'chai' }
-   *         , { tea: 'matcha' }
-   *         , { tea: 'konacha' } ]
-   *     ];
-   *
-   *     expect(arr).to.have.deep.property('[0][1]', 'matcha');
-   *     expect(arr).to.have.deep.property('[1][2].tea', 'konacha');
-   *
-   * Furthermore, `property` changes the subject of the assertion
-   * to be the value of that property from the original object. This
-   * permits for further chainable assertions on that property.
-   *
-   *     expect(obj).to.have.property('foo')
-   *       .that.is.a('string');
-   *     expect(deepObj).to.have.property('green')
-   *       .that.is.an('object')
-   *       .that.deep.equals({ tea: 'matcha' });
-   *     expect(deepObj).to.have.property('teas')
-   *       .that.is.an('array')
-   *       .with.deep.property('[2]')
-   *         .that.deep.equals({ tea: 'konacha' });
-   *
-   * @name property
-   * @alias deep.property
-   * @param {String} name
-   * @param {Mixed} value (optional)
-   * @param {String} message _optional_
-   * @returns value of property for chaining
-   * @api public
-   */
-
-  Assertion.addMethod('property', function (name, val, msg) {
-    if (msg) flag(this, 'message', msg);
-
-    var descriptor = flag(this, 'deep') ? 'deep property ' : 'property '
-      , negate = flag(this, 'negate')
-      , obj = flag(this, 'object')
-      , value = flag(this, 'deep')
-        ? _.getPathValue(name, obj)
-        : obj[name];
-
-    if (negate && undefined !== val) {
-      if (undefined === value) {
-        msg = (msg != null) ? msg + ': ' : '';
-        throw new Error(msg + _.inspect(obj) + ' has no ' + descriptor + _.inspect(name));
-      }
-    } else {
-      this.assert(
-          undefined !== value
-        , 'expected #{this} to have a ' + descriptor + _.inspect(name)
-        , 'expected #{this} to not have ' + descriptor + _.inspect(name));
-    }
-
-    if (undefined !== val) {
-      this.assert(
-          val === value
-        , 'expected #{this} to have a ' + descriptor + _.inspect(name) + ' of #{exp}, but got #{act}'
-        , 'expected #{this} to not have a ' + descriptor + _.inspect(name) + ' of #{act}'
-        , val
-        , value
-      );
-    }
-
-    flag(this, 'object', value);
-  });
-
-
-  /**
-   * ### .ownProperty(name)
-   *
-   * Asserts that the target has an own property `name`.
-   *
-   *     expect('test').to.have.ownProperty('length');
-   *
-   * @name ownProperty
-   * @alias haveOwnProperty
-   * @param {String} name
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertOwnProperty (name, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    this.assert(
-        obj.hasOwnProperty(name)
-      , 'expected #{this} to have own property ' + _.inspect(name)
-      , 'expected #{this} to not have own property ' + _.inspect(name)
-    );
-  }
-
-  Assertion.addMethod('ownProperty', assertOwnProperty);
-  Assertion.addMethod('haveOwnProperty', assertOwnProperty);
-
-  /**
-   * ### .length(value)
-   *
-   * Asserts that the target's `length` property has
-   * the expected value.
-   *
-   *     expect([ 1, 2, 3]).to.have.length(3);
-   *     expect('foobar').to.have.length(6);
-   *
-   * Can also be used as a chain precursor to a value
-   * comparison for the length property.
-   *
-   *     expect('foo').to.have.length.above(2);
-   *     expect([ 1, 2, 3 ]).to.have.length.above(2);
-   *     expect('foo').to.have.length.below(4);
-   *     expect([ 1, 2, 3 ]).to.have.length.below(4);
-   *     expect('foo').to.have.length.within(2,4);
-   *     expect([ 1, 2, 3 ]).to.have.length.within(2,4);
-   *
-   * @name length
-   * @alias lengthOf
-   * @param {Number} length
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertLengthChain () {
-    flag(this, 'doLength', true);
-  }
-
-  function assertLength (n, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    new Assertion(obj, msg).to.have.property('length');
-    var len = obj.length;
-
-    this.assert(
-        len == n
-      , 'expected #{this} to have a length of #{exp} but got #{act}'
-      , 'expected #{this} to not have a length of #{act}'
-      , n
-      , len
-    );
-  }
-
-  Assertion.addChainableMethod('length', assertLength, assertLengthChain);
-  Assertion.addMethod('lengthOf', assertLength);
-
-  /**
-   * ### .match(regexp)
-   *
-   * Asserts that the target matches a regular expression.
-   *
-   *     expect('foobar').to.match(/^foo/);
-   *
-   * @name match
-   * @param {RegExp} RegularExpression
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('match', function (re, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    this.assert(
-        re.exec(obj)
-      , 'expected #{this} to match ' + re
-      , 'expected #{this} not to match ' + re
-    );
-  });
-
-  /**
-   * ### .string(string)
-   *
-   * Asserts that the string target contains another string.
-   *
-   *     expect('foobar').to.have.string('bar');
-   *
-   * @name string
-   * @param {String} string
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('string', function (str, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    new Assertion(obj, msg).is.a('string');
-
-    this.assert(
-        ~obj.indexOf(str)
-      , 'expected #{this} to contain ' + _.inspect(str)
-      , 'expected #{this} to not contain ' + _.inspect(str)
-    );
-  });
-
-
-  /**
-   * ### .keys(key1, [key2], [...])
-   *
-   * Asserts that the target has exactly the given keys, or
-   * asserts the inclusion of some keys when using the
-   * `include` or `contain` modifiers.
-   *
-   *     expect({ foo: 1, bar: 2 }).to.have.keys(['foo', 'bar']);
-   *     expect({ foo: 1, bar: 2, baz: 3 }).to.contain.keys('foo', 'bar');
-   *
-   * @name keys
-   * @alias key
-   * @param {String...|Array} keys
-   * @api public
-   */
-
-  function assertKeys (keys) {
-    var obj = flag(this, 'object')
-      , str
-      , ok = true;
-
-    keys = keys instanceof Array
-      ? keys
-      : Array.prototype.slice.call(arguments);
-
-    if (!keys.length) throw new Error('keys required');
-
-    var actual = Object.keys(obj)
-      , expected = keys
-      , len = keys.length;
-
-    // Inclusion
-    ok = keys.every(function(key){
-      return ~actual.indexOf(key);
-    });
-
-    // Strict
-    if (!flag(this, 'negate') && !flag(this, 'contains')) {
-      ok = ok && keys.length == actual.length;
-    }
-
-    // Key string
-    if (len > 1) {
-      keys = keys.map(function(key){
-        return _.inspect(key);
-      });
-      var last = keys.pop();
-      str = keys.join(', ') + ', and ' + last;
-    } else {
-      str = _.inspect(keys[0]);
-    }
-
-    // Form
-    str = (len > 1 ? 'keys ' : 'key ') + str;
-
-    // Have / include
-    str = (flag(this, 'contains') ? 'contain ' : 'have ') + str;
-
-    // Assertion
-    this.assert(
-        ok
-      , 'expected #{this} to ' + str
-      , 'expected #{this} to not ' + str
-      , expected.sort()
-      , actual.sort()
-      , true
-    );
-  }
-
-  Assertion.addMethod('keys', assertKeys);
-  Assertion.addMethod('key', assertKeys);
-
-  /**
-   * ### .throw(constructor)
-   *
-   * Asserts that the function target will throw a specific error, or specific type of error
-   * (as determined using `instanceof`), optionally with a RegExp or string inclusion test
-   * for the error's message.
-   *
-   *     var err = new ReferenceError('This is a bad function.');
-   *     var fn = function () { throw err; }
-   *     expect(fn).to.throw(ReferenceError);
-   *     expect(fn).to.throw(Error);
-   *     expect(fn).to.throw(/bad function/);
-   *     expect(fn).to.not.throw('good function');
-   *     expect(fn).to.throw(ReferenceError, /bad function/);
-   *     expect(fn).to.throw(err);
-   *     expect(fn).to.not.throw(new RangeError('Out of range.'));
-   *
-   * Please note that when a throw expectation is negated, it will check each
-   * parameter independently, starting with error constructor type. The appropriate way
-   * to check for the existence of a type of error but for a message that does not match
-   * is to use `and`.
-   *
-   *     expect(fn).to.throw(ReferenceError)
-   *        .and.not.throw(/good function/);
-   *
-   * @name throw
-   * @alias throws
-   * @alias Throw
-   * @param {ErrorConstructor} constructor
-   * @param {String|RegExp} expected error message
-   * @param {String} message _optional_
-   * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
-   * @returns error for chaining (null if no error)
-   * @api public
-   */
-
-  function assertThrows (constructor, errMsg, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    new Assertion(obj, msg).is.a('function');
-
-    var thrown = false
-      , desiredError = null
-      , name = null
-      , thrownError = null;
-
-    if (arguments.length === 0) {
-      errMsg = null;
-      constructor = null;
-    } else if (constructor && (constructor instanceof RegExp || 'string' === typeof constructor)) {
-      errMsg = constructor;
-      constructor = null;
-    } else if (constructor && constructor instanceof Error) {
-      desiredError = constructor;
-      constructor = null;
-      errMsg = null;
-    } else if (typeof constructor === 'function') {
-      name = constructor.prototype.name || constructor.name;
-      if (name === 'Error' && constructor !== Error) {
-        name = (new constructor()).name;
-      }
-    } else {
-      constructor = null;
-    }
-
-    try {
-      obj();
-    } catch (err) {
-      // first, check desired error
-      if (desiredError) {
-        this.assert(
-            err === desiredError
-          , 'expected #{this} to throw #{exp} but #{act} was thrown'
-          , 'expected #{this} to not throw #{exp}'
-          , (desiredError instanceof Error ? desiredError.toString() : desiredError)
-          , (err instanceof Error ? err.toString() : err)
-        );
-
-        flag(this, 'object', err);
-        return this;
-      }
-
-      // next, check constructor
-      if (constructor) {
-        this.assert(
-            err instanceof constructor
-          , 'expected #{this} to throw #{exp} but #{act} was thrown'
-          , 'expected #{this} to not throw #{exp} but #{act} was thrown'
-          , name
-          , (err instanceof Error ? err.toString() : err)
-        );
-
-        if (!errMsg) {
-          flag(this, 'object', err);
-          return this;
-        }
-      }
-
-      // next, check message
-      var message = 'object' === _.type(err) && "message" in err
-        ? err.message
-        : '' + err;
-
-      if ((message != null) && errMsg && errMsg instanceof RegExp) {
-        this.assert(
-            errMsg.exec(message)
-          , 'expected #{this} to throw error matching #{exp} but got #{act}'
-          , 'expected #{this} to throw error not matching #{exp}'
-          , errMsg
-          , message
-        );
-
-        flag(this, 'object', err);
-        return this;
-      } else if ((message != null) && errMsg && 'string' === typeof errMsg) {
-        this.assert(
-            ~message.indexOf(errMsg)
-          , 'expected #{this} to throw error including #{exp} but got #{act}'
-          , 'expected #{this} to throw error not including #{act}'
-          , errMsg
-          , message
-        );
-
-        flag(this, 'object', err);
-        return this;
-      } else {
-        thrown = true;
-        thrownError = err;
-      }
-    }
-
-    var actuallyGot = ''
-      , expectedThrown = name !== null
-        ? name
-        : desiredError
-          ? '#{exp}' //_.inspect(desiredError)
-          : 'an error';
-
-    if (thrown) {
-      actuallyGot = ' but #{act} was thrown'
-    }
-
-    this.assert(
-        thrown === true
-      , 'expected #{this} to throw ' + expectedThrown + actuallyGot
-      , 'expected #{this} to not throw ' + expectedThrown + actuallyGot
-      , (desiredError instanceof Error ? desiredError.toString() : desiredError)
-      , (thrownError instanceof Error ? thrownError.toString() : thrownError)
-    );
-
-    flag(this, 'object', thrownError);
-  };
-
-  Assertion.addMethod('throw', assertThrows);
-  Assertion.addMethod('throws', assertThrows);
-  Assertion.addMethod('Throw', assertThrows);
-
-  /**
-   * ### .respondTo(method)
-   *
-   * Asserts that the object or class target will respond to a method.
-   *
-   *     Klass.prototype.bar = function(){};
-   *     expect(Klass).to.respondTo('bar');
-   *     expect(obj).to.respondTo('bar');
-   *
-   * To check if a constructor will respond to a static function,
-   * set the `itself` flag.
-   *
-   *     Klass.baz = function(){};
-   *     expect(Klass).itself.to.respondTo('baz');
-   *
-   * @name respondTo
-   * @param {String} method
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('respondTo', function (method, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object')
-      , itself = flag(this, 'itself')
-      , context = ('function' === _.type(obj) && !itself)
-        ? obj.prototype[method]
-        : obj[method];
-
-    this.assert(
-        'function' === typeof context
-      , 'expected #{this} to respond to ' + _.inspect(method)
-      , 'expected #{this} to not respond to ' + _.inspect(method)
-    );
-  });
-
-  /**
-   * ### .itself
-   *
-   * Sets the `itself` flag, later used by the `respondTo` assertion.
-   *
-   *     function Foo() {}
-   *     Foo.bar = function() {}
-   *     Foo.prototype.baz = function() {}
-   *
-   *     expect(Foo).itself.to.respondTo('bar');
-   *     expect(Foo).itself.not.to.respondTo('baz');
-   *
-   * @name itself
-   * @api public
-   */
-
-  Assertion.addProperty('itself', function () {
-    flag(this, 'itself', true);
-  });
-
-  /**
-   * ### .satisfy(method)
-   *
-   * Asserts that the target passes a given truth test.
-   *
-   *     expect(1).to.satisfy(function(num) { return num > 0; });
-   *
-   * @name satisfy
-   * @param {Function} matcher
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('satisfy', function (matcher, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    var result = matcher(obj);
-    this.assert(
-        result
-      , 'expected #{this} to satisfy ' + _.objDisplay(matcher)
-      , 'expected #{this} to not satisfy' + _.objDisplay(matcher)
-      , this.negate ? false : true
-      , result
-    );
-  });
-
-  /**
-   * ### .closeTo(expected, delta)
-   *
-   * Asserts that the target is equal `expected`, to within a +/- `delta` range.
-   *
-   *     expect(1.5).to.be.closeTo(1, 0.5);
-   *
-   * @name closeTo
-   * @param {Number} expected
-   * @param {Number} delta
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('closeTo', function (expected, delta, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-
-    new Assertion(obj, msg).is.a('number');
-    if (_.type(expected) !== 'number' || _.type(delta) !== 'number') {
-      throw new Error('the arguments to closeTo must be numbers');
-    }
-
-    this.assert(
-        Math.abs(obj - expected) <= delta
-      , 'expected #{this} to be close to ' + expected + ' +/- ' + delta
-      , 'expected #{this} not to be close to ' + expected + ' +/- ' + delta
-    );
-  });
-
-  function isSubsetOf(subset, superset, cmp) {
-    return subset.every(function(elem) {
-      if (!cmp) return superset.indexOf(elem) !== -1;
-
-      return superset.some(function(elem2) {
-        return cmp(elem, elem2);
-      });
-    })
-  }
-
-  /**
-   * ### .members(set)
-   *
-   * Asserts that the target is a superset of `set`,
-   * or that the target and `set` have the same strictly-equal (===) members.
-   * Alternately, if the `deep` flag is set, set members are compared for deep
-   * equality.
-   *
-   *     expect([1, 2, 3]).to.include.members([3, 2]);
-   *     expect([1, 2, 3]).to.not.include.members([3, 2, 8]);
-   *
-   *     expect([4, 2]).to.have.members([2, 4]);
-   *     expect([5, 2]).to.not.have.members([5, 2, 1]);
-   *
-   *     expect([{ id: 1 }]).to.deep.include.members([{ id: 1 }]);
-   *
-   * @name members
-   * @param {Array} set
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('members', function (subset, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-
-    new Assertion(obj).to.be.an('array');
-    new Assertion(subset).to.be.an('array');
-
-    var cmp = flag(this, 'deep') ? _.eql : undefined;
-
-    if (flag(this, 'contains')) {
-      return this.assert(
-          isSubsetOf(subset, obj, cmp)
-        , 'expected #{this} to be a superset of #{act}'
-        , 'expected #{this} to not be a superset of #{act}'
-        , obj
-        , subset
-      );
-    }
-
-    this.assert(
-        isSubsetOf(obj, subset, cmp) && isSubsetOf(subset, obj, cmp)
-        , 'expected #{this} to have the same members as #{act}'
-        , 'expected #{this} to not have the same members as #{act}'
-        , obj
-        , subset
-    );
-  });
-};
-
-},{}],15:[function(require,module,exports){
-/*!
- * chai
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-
-module.exports = function (chai, util) {
-
-  /*!
-   * Chai dependencies.
-   */
-
-  var Assertion = chai.Assertion
-    , flag = util.flag;
-
-  /*!
-   * Module export.
-   */
-
-  /**
-   * ### assert(expression, message)
-   *
-   * Write your own test expressions.
-   *
-   *     assert('foo' !== 'bar', 'foo is not bar');
-   *     assert(Array.isArray([]), 'empty arrays are arrays');
-   *
-   * @param {Mixed} expression to test for truthiness
-   * @param {String} message to display on error
-   * @name assert
-   * @api public
-   */
-
-  var assert = chai.assert = function (express, errmsg) {
-    var test = new Assertion(null, null, chai.assert);
-    test.assert(
-        express
-      , errmsg
-      , '[ negation message unavailable ]'
-    );
-  };
-
-  /**
-   * ### .fail(actual, expected, [message], [operator])
-   *
-   * Throw a failure. Node.js `assert` module-compatible.
-   *
-   * @name fail
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @param {String} operator
-   * @api public
-   */
-
-  assert.fail = function (actual, expected, message, operator) {
-    message = message || 'assert.fail()';
-    throw new chai.AssertionError(message, {
-        actual: actual
-      , expected: expected
-      , operator: operator
-    }, assert.fail);
-  };
-
-  /**
-   * ### .ok(object, [message])
-   *
-   * Asserts that `object` is truthy.
-   *
-   *     assert.ok('everything', 'everything is ok');
-   *     assert.ok(false, 'this will fail');
-   *
-   * @name ok
-   * @param {Mixed} object to test
-   * @param {String} message
-   * @api public
-   */
-
-  assert.ok = function (val, msg) {
-    new Assertion(val, msg).is.ok;
-  };
-
-  /**
-   * ### .notOk(object, [message])
-   *
-   * Asserts that `object` is falsy.
-   *
-   *     assert.notOk('everything', 'this will fail');
-   *     assert.notOk(false, 'this will pass');
-   *
-   * @name notOk
-   * @param {Mixed} object to test
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notOk = function (val, msg) {
-    new Assertion(val, msg).is.not.ok;
-  };
-
-  /**
-   * ### .equal(actual, expected, [message])
-   *
-   * Asserts non-strict equality (`==`) of `actual` and `expected`.
-   *
-   *     assert.equal(3, '3', '== coerces values to strings');
-   *
-   * @name equal
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.equal = function (act, exp, msg) {
-    var test = new Assertion(act, msg, assert.equal);
-
-    test.assert(
-        exp == flag(test, 'object')
-      , 'expected #{this} to equal #{exp}'
-      , 'expected #{this} to not equal #{act}'
-      , exp
-      , act
-    );
-  };
-
-  /**
-   * ### .notEqual(actual, expected, [message])
-   *
-   * Asserts non-strict inequality (`!=`) of `actual` and `expected`.
-   *
-   *     assert.notEqual(3, 4, 'these numbers are not equal');
-   *
-   * @name notEqual
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notEqual = function (act, exp, msg) {
-    var test = new Assertion(act, msg, assert.notEqual);
-
-    test.assert(
-        exp != flag(test, 'object')
-      , 'expected #{this} to not equal #{exp}'
-      , 'expected #{this} to equal #{act}'
-      , exp
-      , act
-    );
-  };
-
-  /**
-   * ### .strictEqual(actual, expected, [message])
-   *
-   * Asserts strict equality (`===`) of `actual` and `expected`.
-   *
-   *     assert.strictEqual(true, true, 'these booleans are strictly equal');
-   *
-   * @name strictEqual
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.strictEqual = function (act, exp, msg) {
-    new Assertion(act, msg).to.equal(exp);
-  };
-
-  /**
-   * ### .notStrictEqual(actual, expected, [message])
-   *
-   * Asserts strict inequality (`!==`) of `actual` and `expected`.
-   *
-   *     assert.notStrictEqual(3, '3', 'no coercion for strict equality');
-   *
-   * @name notStrictEqual
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notStrictEqual = function (act, exp, msg) {
-    new Assertion(act, msg).to.not.equal(exp);
-  };
-
-  /**
-   * ### .deepEqual(actual, expected, [message])
-   *
-   * Asserts that `actual` is deeply equal to `expected`.
-   *
-   *     assert.deepEqual({ tea: 'green' }, { tea: 'green' });
-   *
-   * @name deepEqual
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.deepEqual = function (act, exp, msg) {
-    new Assertion(act, msg).to.eql(exp);
-  };
-
-  /**
-   * ### .notDeepEqual(actual, expected, [message])
-   *
-   * Assert that `actual` is not deeply equal to `expected`.
-   *
-   *     assert.notDeepEqual({ tea: 'green' }, { tea: 'jasmine' });
-   *
-   * @name notDeepEqual
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notDeepEqual = function (act, exp, msg) {
-    new Assertion(act, msg).to.not.eql(exp);
-  };
-
-  /**
-   * ### .isTrue(value, [message])
-   *
-   * Asserts that `value` is true.
-   *
-   *     var teaServed = true;
-   *     assert.isTrue(teaServed, 'the tea has been served');
-   *
-   * @name isTrue
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isTrue = function (val, msg) {
-    new Assertion(val, msg).is['true'];
-  };
-
-  /**
-   * ### .isFalse(value, [message])
-   *
-   * Asserts that `value` is false.
-   *
-   *     var teaServed = false;
-   *     assert.isFalse(teaServed, 'no tea yet? hmm...');
-   *
-   * @name isFalse
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isFalse = function (val, msg) {
-    new Assertion(val, msg).is['false'];
-  };
-
-  /**
-   * ### .isNull(value, [message])
-   *
-   * Asserts that `value` is null.
-   *
-   *     assert.isNull(err, 'there was no error');
-   *
-   * @name isNull
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNull = function (val, msg) {
-    new Assertion(val, msg).to.equal(null);
-  };
-
-  /**
-   * ### .isNotNull(value, [message])
-   *
-   * Asserts that `value` is not null.
-   *
-   *     var tea = 'tasty chai';
-   *     assert.isNotNull(tea, 'great, time for tea!');
-   *
-   * @name isNotNull
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotNull = function (val, msg) {
-    new Assertion(val, msg).to.not.equal(null);
-  };
-
-  /**
-   * ### .isUndefined(value, [message])
-   *
-   * Asserts that `value` is `undefined`.
-   *
-   *     var tea;
-   *     assert.isUndefined(tea, 'no tea defined');
-   *
-   * @name isUndefined
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isUndefined = function (val, msg) {
-    new Assertion(val, msg).to.equal(undefined);
-  };
-
-  /**
-   * ### .isDefined(value, [message])
-   *
-   * Asserts that `value` is not `undefined`.
-   *
-   *     var tea = 'cup of chai';
-   *     assert.isDefined(tea, 'tea has been defined');
-   *
-   * @name isDefined
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isDefined = function (val, msg) {
-    new Assertion(val, msg).to.not.equal(undefined);
-  };
-
-  /**
-   * ### .isFunction(value, [message])
-   *
-   * Asserts that `value` is a function.
-   *
-   *     function serveTea() { return 'cup of tea'; };
-   *     assert.isFunction(serveTea, 'great, we can have tea now');
-   *
-   * @name isFunction
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isFunction = function (val, msg) {
-    new Assertion(val, msg).to.be.a('function');
-  };
-
-  /**
-   * ### .isNotFunction(value, [message])
-   *
-   * Asserts that `value` is _not_ a function.
-   *
-   *     var serveTea = [ 'heat', 'pour', 'sip' ];
-   *     assert.isNotFunction(serveTea, 'great, we have listed the steps');
-   *
-   * @name isNotFunction
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotFunction = function (val, msg) {
-    new Assertion(val, msg).to.not.be.a('function');
-  };
-
-  /**
-   * ### .isObject(value, [message])
-   *
-   * Asserts that `value` is an object (as revealed by
-   * `Object.prototype.toString`).
-   *
-   *     var selection = { name: 'Chai', serve: 'with spices' };
-   *     assert.isObject(selection, 'tea selection is an object');
-   *
-   * @name isObject
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isObject = function (val, msg) {
-    new Assertion(val, msg).to.be.a('object');
-  };
-
-  /**
-   * ### .isNotObject(value, [message])
-   *
-   * Asserts that `value` is _not_ an object.
-   *
-   *     var selection = 'chai'
-   *     assert.isNotObject(selection, 'tea selection is not an object');
-   *     assert.isNotObject(null, 'null is not an object');
-   *
-   * @name isNotObject
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotObject = function (val, msg) {
-    new Assertion(val, msg).to.not.be.a('object');
-  };
-
-  /**
-   * ### .isArray(value, [message])
-   *
-   * Asserts that `value` is an array.
-   *
-   *     var menu = [ 'green', 'chai', 'oolong' ];
-   *     assert.isArray(menu, 'what kind of tea do we want?');
-   *
-   * @name isArray
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isArray = function (val, msg) {
-    new Assertion(val, msg).to.be.an('array');
-  };
-
-  /**
-   * ### .isNotArray(value, [message])
-   *
-   * Asserts that `value` is _not_ an array.
-   *
-   *     var menu = 'green|chai|oolong';
-   *     assert.isNotArray(menu, 'what kind of tea do we want?');
-   *
-   * @name isNotArray
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotArray = function (val, msg) {
-    new Assertion(val, msg).to.not.be.an('array');
-  };
-
-  /**
-   * ### .isString(value, [message])
-   *
-   * Asserts that `value` is a string.
-   *
-   *     var teaOrder = 'chai';
-   *     assert.isString(teaOrder, 'order placed');
-   *
-   * @name isString
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isString = function (val, msg) {
-    new Assertion(val, msg).to.be.a('string');
-  };
-
-  /**
-   * ### .isNotString(value, [message])
-   *
-   * Asserts that `value` is _not_ a string.
-   *
-   *     var teaOrder = 4;
-   *     assert.isNotString(teaOrder, 'order placed');
-   *
-   * @name isNotString
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotString = function (val, msg) {
-    new Assertion(val, msg).to.not.be.a('string');
-  };
-
-  /**
-   * ### .isNumber(value, [message])
-   *
-   * Asserts that `value` is a number.
-   *
-   *     var cups = 2;
-   *     assert.isNumber(cups, 'how many cups');
-   *
-   * @name isNumber
-   * @param {Number} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNumber = function (val, msg) {
-    new Assertion(val, msg).to.be.a('number');
-  };
-
-  /**
-   * ### .isNotNumber(value, [message])
-   *
-   * Asserts that `value` is _not_ a number.
-   *
-   *     var cups = '2 cups please';
-   *     assert.isNotNumber(cups, 'how many cups');
-   *
-   * @name isNotNumber
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotNumber = function (val, msg) {
-    new Assertion(val, msg).to.not.be.a('number');
-  };
-
-  /**
-   * ### .isBoolean(value, [message])
-   *
-   * Asserts that `value` is a boolean.
-   *
-   *     var teaReady = true
-   *       , teaServed = false;
-   *
-   *     assert.isBoolean(teaReady, 'is the tea ready');
-   *     assert.isBoolean(teaServed, 'has tea been served');
-   *
-   * @name isBoolean
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isBoolean = function (val, msg) {
-    new Assertion(val, msg).to.be.a('boolean');
-  };
-
-  /**
-   * ### .isNotBoolean(value, [message])
-   *
-   * Asserts that `value` is _not_ a boolean.
-   *
-   *     var teaReady = 'yep'
-   *       , teaServed = 'nope';
-   *
-   *     assert.isNotBoolean(teaReady, 'is the tea ready');
-   *     assert.isNotBoolean(teaServed, 'has tea been served');
-   *
-   * @name isNotBoolean
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotBoolean = function (val, msg) {
-    new Assertion(val, msg).to.not.be.a('boolean');
-  };
-
-  /**
-   * ### .typeOf(value, name, [message])
-   *
-   * Asserts that `value`'s type is `name`, as determined by
-   * `Object.prototype.toString`.
-   *
-   *     assert.typeOf({ tea: 'chai' }, 'object', 'we have an object');
-   *     assert.typeOf(['chai', 'jasmine'], 'array', 'we have an array');
-   *     assert.typeOf('tea', 'string', 'we have a string');
-   *     assert.typeOf(/tea/, 'regexp', 'we have a regular expression');
-   *     assert.typeOf(null, 'null', 'we have a null');
-   *     assert.typeOf(undefined, 'undefined', 'we have an undefined');
-   *
-   * @name typeOf
-   * @param {Mixed} value
-   * @param {String} name
-   * @param {String} message
-   * @api public
-   */
-
-  assert.typeOf = function (val, type, msg) {
-    new Assertion(val, msg).to.be.a(type);
-  };
-
-  /**
-   * ### .notTypeOf(value, name, [message])
-   *
-   * Asserts that `value`'s type is _not_ `name`, as determined by
-   * `Object.prototype.toString`.
-   *
-   *     assert.notTypeOf('tea', 'number', 'strings are not numbers');
-   *
-   * @name notTypeOf
-   * @param {Mixed} value
-   * @param {String} typeof name
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notTypeOf = function (val, type, msg) {
-    new Assertion(val, msg).to.not.be.a(type);
-  };
-
-  /**
-   * ### .instanceOf(object, constructor, [message])
-   *
-   * Asserts that `value` is an instance of `constructor`.
-   *
-   *     var Tea = function (name) { this.name = name; }
-   *       , chai = new Tea('chai');
-   *
-   *     assert.instanceOf(chai, Tea, 'chai is an instance of tea');
-   *
-   * @name instanceOf
-   * @param {Object} object
-   * @param {Constructor} constructor
-   * @param {String} message
-   * @api public
-   */
-
-  assert.instanceOf = function (val, type, msg) {
-    new Assertion(val, msg).to.be.instanceOf(type);
-  };
-
-  /**
-   * ### .notInstanceOf(object, constructor, [message])
-   *
-   * Asserts `value` is not an instance of `constructor`.
-   *
-   *     var Tea = function (name) { this.name = name; }
-   *       , chai = new String('chai');
-   *
-   *     assert.notInstanceOf(chai, Tea, 'chai is not an instance of tea');
-   *
-   * @name notInstanceOf
-   * @param {Object} object
-   * @param {Constructor} constructor
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notInstanceOf = function (val, type, msg) {
-    new Assertion(val, msg).to.not.be.instanceOf(type);
-  };
-
-  /**
-   * ### .include(haystack, needle, [message])
-   *
-   * Asserts that `haystack` includes `needle`. Works
-   * for strings and arrays.
-   *
-   *     assert.include('foobar', 'bar', 'foobar contains string "bar"');
-   *     assert.include([ 1, 2, 3 ], 3, 'array contains value');
-   *
-   * @name include
-   * @param {Array|String} haystack
-   * @param {Mixed} needle
-   * @param {String} message
-   * @api public
-   */
-
-  assert.include = function (exp, inc, msg) {
-    new Assertion(exp, msg, assert.include).include(inc);
-  };
-
-  /**
-   * ### .notInclude(haystack, needle, [message])
-   *
-   * Asserts that `haystack` does not include `needle`. Works
-   * for strings and arrays.
-   *i
-   *     assert.notInclude('foobar', 'baz', 'string not include substring');
-   *     assert.notInclude([ 1, 2, 3 ], 4, 'array not include contain value');
-   *
-   * @name notInclude
-   * @param {Array|String} haystack
-   * @param {Mixed} needle
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notInclude = function (exp, inc, msg) {
-    new Assertion(exp, msg, assert.notInclude).not.include(inc);
-  };
-
-  /**
-   * ### .match(value, regexp, [message])
-   *
-   * Asserts that `value` matches the regular expression `regexp`.
-   *
-   *     assert.match('foobar', /^foo/, 'regexp matches');
-   *
-   * @name match
-   * @param {Mixed} value
-   * @param {RegExp} regexp
-   * @param {String} message
-   * @api public
-   */
-
-  assert.match = function (exp, re, msg) {
-    new Assertion(exp, msg).to.match(re);
-  };
-
-  /**
-   * ### .notMatch(value, regexp, [message])
-   *
-   * Asserts that `value` does not match the regular expression `regexp`.
-   *
-   *     assert.notMatch('foobar', /^foo/, 'regexp does not match');
-   *
-   * @name notMatch
-   * @param {Mixed} value
-   * @param {RegExp} regexp
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notMatch = function (exp, re, msg) {
-    new Assertion(exp, msg).to.not.match(re);
-  };
-
-  /**
-   * ### .property(object, property, [message])
-   *
-   * Asserts that `object` has a property named by `property`.
-   *
-   *     assert.property({ tea: { green: 'matcha' }}, 'tea');
-   *
-   * @name property
-   * @param {Object} object
-   * @param {String} property
-   * @param {String} message
-   * @api public
-   */
-
-  assert.property = function (obj, prop, msg) {
-    new Assertion(obj, msg).to.have.property(prop);
-  };
-
-  /**
-   * ### .notProperty(object, property, [message])
-   *
-   * Asserts that `object` does _not_ have a property named by `property`.
-   *
-   *     assert.notProperty({ tea: { green: 'matcha' }}, 'coffee');
-   *
-   * @name notProperty
-   * @param {Object} object
-   * @param {String} property
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notProperty = function (obj, prop, msg) {
-    new Assertion(obj, msg).to.not.have.property(prop);
-  };
-
-  /**
-   * ### .deepProperty(object, property, [message])
-   *
-   * Asserts that `object` has a property named by `property`, which can be a
-   * string using dot- and bracket-notation for deep reference.
-   *
-   *     assert.deepProperty({ tea: { green: 'matcha' }}, 'tea.green');
-   *
-   * @name deepProperty
-   * @param {Object} object
-   * @param {String} property
-   * @param {String} message
-   * @api public
-   */
-
-  assert.deepProperty = function (obj, prop, msg) {
-    new Assertion(obj, msg).to.have.deep.property(prop);
-  };
-
-  /**
-   * ### .notDeepProperty(object, property, [message])
-   *
-   * Asserts that `object` does _not_ have a property named by `property`, which
-   * can be a string using dot- and bracket-notation for deep reference.
-   *
-   *     assert.notDeepProperty({ tea: { green: 'matcha' }}, 'tea.oolong');
-   *
-   * @name notDeepProperty
-   * @param {Object} object
-   * @param {String} property
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notDeepProperty = function (obj, prop, msg) {
-    new Assertion(obj, msg).to.not.have.deep.property(prop);
-  };
-
-  /**
-   * ### .propertyVal(object, property, value, [message])
-   *
-   * Asserts that `object` has a property named by `property` with value given
-   * by `value`.
-   *
-   *     assert.propertyVal({ tea: 'is good' }, 'tea', 'is good');
-   *
-   * @name propertyVal
-   * @param {Object} object
-   * @param {String} property
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.propertyVal = function (obj, prop, val, msg) {
-    new Assertion(obj, msg).to.have.property(prop, val);
-  };
-
-  /**
-   * ### .propertyNotVal(object, property, value, [message])
-   *
-   * Asserts that `object` has a property named by `property`, but with a value
-   * different from that given by `value`.
-   *
-   *     assert.propertyNotVal({ tea: 'is good' }, 'tea', 'is bad');
-   *
-   * @name propertyNotVal
-   * @param {Object} object
-   * @param {String} property
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.propertyNotVal = function (obj, prop, val, msg) {
-    new Assertion(obj, msg).to.not.have.property(prop, val);
-  };
-
-  /**
-   * ### .deepPropertyVal(object, property, value, [message])
-   *
-   * Asserts that `object` has a property named by `property` with value given
-   * by `value`. `property` can use dot- and bracket-notation for deep
-   * reference.
-   *
-   *     assert.deepPropertyVal({ tea: { green: 'matcha' }}, 'tea.green', 'matcha');
-   *
-   * @name deepPropertyVal
-   * @param {Object} object
-   * @param {String} property
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.deepPropertyVal = function (obj, prop, val, msg) {
-    new Assertion(obj, msg).to.have.deep.property(prop, val);
-  };
-
-  /**
-   * ### .deepPropertyNotVal(object, property, value, [message])
-   *
-   * Asserts that `object` has a property named by `property`, but with a value
-   * different from that given by `value`. `property` can use dot- and
-   * bracket-notation for deep reference.
-   *
-   *     assert.deepPropertyNotVal({ tea: { green: 'matcha' }}, 'tea.green', 'konacha');
-   *
-   * @name deepPropertyNotVal
-   * @param {Object} object
-   * @param {String} property
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.deepPropertyNotVal = function (obj, prop, val, msg) {
-    new Assertion(obj, msg).to.not.have.deep.property(prop, val);
-  };
-
-  /**
-   * ### .lengthOf(object, length, [message])
-   *
-   * Asserts that `object` has a `length` property with the expected value.
-   *
-   *     assert.lengthOf([1,2,3], 3, 'array has length of 3');
-   *     assert.lengthOf('foobar', 5, 'string has length of 6');
-   *
-   * @name lengthOf
-   * @param {Mixed} object
-   * @param {Number} length
-   * @param {String} message
-   * @api public
-   */
-
-  assert.lengthOf = function (exp, len, msg) {
-    new Assertion(exp, msg).to.have.length(len);
-  };
-
-  /**
-   * ### .throws(function, [constructor/string/regexp], [string/regexp], [message])
-   *
-   * Asserts that `function` will throw an error that is an instance of
-   * `constructor`, or alternately that it will throw an error with message
-   * matching `regexp`.
-   *
-   *     assert.throw(fn, 'function throws a reference error');
-   *     assert.throw(fn, /function throws a reference error/);
-   *     assert.throw(fn, ReferenceError);
-   *     assert.throw(fn, ReferenceError, 'function throws a reference error');
-   *     assert.throw(fn, ReferenceError, /function throws a reference error/);
-   *
-   * @name throws
-   * @alias throw
-   * @alias Throw
-   * @param {Function} function
-   * @param {ErrorConstructor} constructor
-   * @param {RegExp} regexp
-   * @param {String} message
-   * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
-   * @api public
-   */
-
-  assert.Throw = function (fn, errt, errs, msg) {
-    if ('string' === typeof errt || errt instanceof RegExp) {
-      errs = errt;
-      errt = null;
-    }
-
-    var assertErr = new Assertion(fn, msg).to.Throw(errt, errs);
-    return flag(assertErr, 'object');
-  };
-
-  /**
-   * ### .doesNotThrow(function, [constructor/regexp], [message])
-   *
-   * Asserts that `function` will _not_ throw an error that is an instance of
-   * `constructor`, or alternately that it will not throw an error with message
-   * matching `regexp`.
-   *
-   *     assert.doesNotThrow(fn, Error, 'function does not throw');
-   *
-   * @name doesNotThrow
-   * @param {Function} function
-   * @param {ErrorConstructor} constructor
-   * @param {RegExp} regexp
-   * @param {String} message
-   * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
-   * @api public
-   */
-
-  assert.doesNotThrow = function (fn, type, msg) {
-    if ('string' === typeof type) {
-      msg = type;
-      type = null;
-    }
-
-    new Assertion(fn, msg).to.not.Throw(type);
-  };
-
-  /**
-   * ### .operator(val1, operator, val2, [message])
-   *
-   * Compares two values using `operator`.
-   *
-   *     assert.operator(1, '<', 2, 'everything is ok');
-   *     assert.operator(1, '>', 2, 'this will fail');
-   *
-   * @name operator
-   * @param {Mixed} val1
-   * @param {String} operator
-   * @param {Mixed} val2
-   * @param {String} message
-   * @api public
-   */
-
-  assert.operator = function (val, operator, val2, msg) {
-    if (!~['==', '===', '>', '>=', '<', '<=', '!=', '!=='].indexOf(operator)) {
-      throw new Error('Invalid operator "' + operator + '"');
-    }
-    var test = new Assertion(eval(val + operator + val2), msg);
-    test.assert(
-        true === flag(test, 'object')
-      , 'expected ' + util.inspect(val) + ' to be ' + operator + ' ' + util.inspect(val2)
-      , 'expected ' + util.inspect(val) + ' to not be ' + operator + ' ' + util.inspect(val2) );
-  };
-
-  /**
-   * ### .closeTo(actual, expected, delta, [message])
-   *
-   * Asserts that the target is equal `expected`, to within a +/- `delta` range.
-   *
-   *     assert.closeTo(1.5, 1, 0.5, 'numbers are close');
-   *
-   * @name closeTo
-   * @param {Number} actual
-   * @param {Number} expected
-   * @param {Number} delta
-   * @param {String} message
-   * @api public
-   */
-
-  assert.closeTo = function (act, exp, delta, msg) {
-    new Assertion(act, msg).to.be.closeTo(exp, delta);
-  };
-
-  /**
-   * ### .sameMembers(set1, set2, [message])
-   *
-   * Asserts that `set1` and `set2` have the same members.
-   * Order is not taken into account.
-   *
-   *     assert.sameMembers([ 1, 2, 3 ], [ 2, 1, 3 ], 'same members');
-   *
-   * @name sameMembers
-   * @param {Array} set1
-   * @param {Array} set2
-   * @param {String} message
-   * @api public
-   */
-
-  assert.sameMembers = function (set1, set2, msg) {
-    new Assertion(set1, msg).to.have.same.members(set2);
-  }
-
-  /**
-   * ### .includeMembers(superset, subset, [message])
-   *
-   * Asserts that `subset` is included in `superset`.
-   * Order is not taken into account.
-   *
-   *     assert.includeMembers([ 1, 2, 3 ], [ 2, 1 ], 'include members');
-   *
-   * @name includeMembers
-   * @param {Array} superset
-   * @param {Array} subset
-   * @param {String} message
-   * @api public
-   */
-
-  assert.includeMembers = function (superset, subset, msg) {
-    new Assertion(superset, msg).to.include.members(subset);
-  }
-
-  /*!
-   * Undocumented / untested
-   */
-
-  assert.ifError = function (val, msg) {
-    new Assertion(val, msg).to.not.be.ok;
-  };
-
-  /*!
-   * Aliases.
-   */
-
-  (function alias(name, as){
-    assert[as] = assert[name];
-    return alias;
-  })
-  ('Throw', 'throw')
-  ('Throw', 'throws');
-};
-
-},{}],16:[function(require,module,exports){
-/*!
- * chai
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-module.exports = function (chai, util) {
-  chai.expect = function (val, message) {
-    return new chai.Assertion(val, message);
-  };
-};
-
-
-},{}],17:[function(require,module,exports){
-/*!
- * chai
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-module.exports = function (chai, util) {
-  var Assertion = chai.Assertion;
-
-  function loadShould () {
-    // explicitly define this method as function as to have it's name to include as `ssfi`
-    function shouldGetter() {
-      if (this instanceof String || this instanceof Number) {
-        return new Assertion(this.constructor(this), null, shouldGetter);
-      } else if (this instanceof Boolean) {
-        return new Assertion(this == true, null, shouldGetter);
-      }
-      return new Assertion(this, null, shouldGetter);
-    }
-    function shouldSetter(value) {
-      // See https://github.com/chaijs/chai/issues/86: this makes
-      // `whatever.should = someValue` actually set `someValue`, which is
-      // especially useful for `global.should = require('chai').should()`.
-      //
-      // Note that we have to use [[DefineProperty]] instead of [[Put]]
-      // since otherwise we would trigger this very setter!
-      Object.defineProperty(this, 'should', {
-        value: value,
-        enumerable: true,
-        configurable: true,
-        writable: true
-      });
-    }
-    // modify Object.prototype to have `should`
-    Object.defineProperty(Object.prototype, 'should', {
-      set: shouldSetter
-      , get: shouldGetter
-      , configurable: true
-    });
-
-    var should = {};
-
-    should.equal = function (val1, val2, msg) {
-      new Assertion(val1, msg).to.equal(val2);
-    };
-
-    should.Throw = function (fn, errt, errs, msg) {
-      new Assertion(fn, msg).to.Throw(errt, errs);
-    };
-
-    should.exist = function (val, msg) {
-      new Assertion(val, msg).to.exist;
-    }
-
-    // negation
-    should.not = {}
-
-    should.not.equal = function (val1, val2, msg) {
-      new Assertion(val1, msg).to.not.equal(val2);
-    };
-
-    should.not.Throw = function (fn, errt, errs, msg) {
-      new Assertion(fn, msg).to.not.Throw(errt, errs);
-    };
-
-    should.not.exist = function (val, msg) {
-      new Assertion(val, msg).to.not.exist;
-    }
-
-    should['throw'] = should['Throw'];
-    should.not['throw'] = should.not['Throw'];
-
-    return should;
-  };
-
-  chai.should = loadShould;
-  chai.Should = loadShould;
-};
-
-},{}],18:[function(require,module,exports){
-/*!
- * Chai - addChainingMethod utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Module dependencies
- */
-
-var transferFlags = require('./transferFlags');
-var flag = require('./flag');
-var config = require('../config');
-
-/*!
- * Module variables
- */
-
-// Check whether `__proto__` is supported
-var hasProtoSupport = '__proto__' in Object;
-
-// Without `__proto__` support, this module will need to add properties to a function.
-// However, some Function.prototype methods cannot be overwritten,
-// and there seems no easy cross-platform way to detect them (@see chaijs/chai/issues/69).
-var excludeNames = /^(?:length|name|arguments|caller)$/;
-
-// Cache `Function` properties
-var call  = Function.prototype.call,
-    apply = Function.prototype.apply;
-
-/**
- * ### addChainableMethod (ctx, name, method, chainingBehavior)
- *
- * Adds a method to an object, such that the method can also be chained.
- *
- *     utils.addChainableMethod(chai.Assertion.prototype, 'foo', function (str) {
- *       var obj = utils.flag(this, 'object');
- *       new chai.Assertion(obj).to.be.equal(str);
- *     });
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.addChainableMethod('foo', fn, chainingBehavior);
- *
- * The result can then be used as both a method assertion, executing both `method` and
- * `chainingBehavior`, or as a language chain, which only executes `chainingBehavior`.
- *
- *     expect(fooStr).to.be.foo('bar');
- *     expect(fooStr).to.be.foo.equal('foo');
- *
- * @param {Object} ctx object to which the method is added
- * @param {String} name of method to add
- * @param {Function} method function to be used for `name`, when called
- * @param {Function} chainingBehavior function to be called every time the property is accessed
- * @name addChainableMethod
- * @api public
- */
-
-module.exports = function (ctx, name, method, chainingBehavior) {
-  if (typeof chainingBehavior !== 'function') {
-    chainingBehavior = function () { };
-  }
-
-  var chainableBehavior = {
-      method: method
-    , chainingBehavior: chainingBehavior
-  };
-
-  // save the methods so we can overwrite them later, if we need to.
-  if (!ctx.__methods) {
-    ctx.__methods = {};
-  }
-  ctx.__methods[name] = chainableBehavior;
-
-  Object.defineProperty(ctx, name,
-    { get: function () {
-        chainableBehavior.chainingBehavior.call(this);
-
-        var assert = function assert() {
-          var old_ssfi = flag(this, 'ssfi');
-          if (old_ssfi && config.includeStack === false)
-            flag(this, 'ssfi', assert);
-          var result = chainableBehavior.method.apply(this, arguments);
-          return result === undefined ? this : result;
-        };
-
-        // Use `__proto__` if available
-        if (hasProtoSupport) {
-          // Inherit all properties from the object by replacing the `Function` prototype
-          var prototype = assert.__proto__ = Object.create(this);
-          // Restore the `call` and `apply` methods from `Function`
-          prototype.call = call;
-          prototype.apply = apply;
-        }
-        // Otherwise, redefine all properties (slow!)
-        else {
-          var asserterNames = Object.getOwnPropertyNames(ctx);
-          asserterNames.forEach(function (asserterName) {
-            if (!excludeNames.test(asserterName)) {
-              var pd = Object.getOwnPropertyDescriptor(ctx, asserterName);
-              Object.defineProperty(assert, asserterName, pd);
-            }
-          });
-        }
-
-        transferFlags(this, assert);
-        return assert;
-      }
-    , configurable: true
-  });
-};
-
-},{"../config":13,"./flag":21,"./transferFlags":35}],19:[function(require,module,exports){
-/*!
- * Chai - addMethod utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-var config = require('../config');
-
-/**
- * ### .addMethod (ctx, name, method)
- *
- * Adds a method to the prototype of an object.
- *
- *     utils.addMethod(chai.Assertion.prototype, 'foo', function (str) {
- *       var obj = utils.flag(this, 'object');
- *       new chai.Assertion(obj).to.be.equal(str);
- *     });
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.addMethod('foo', fn);
- *
- * Then can be used as any other assertion.
- *
- *     expect(fooStr).to.be.foo('bar');
- *
- * @param {Object} ctx object to which the method is added
- * @param {String} name of method to add
- * @param {Function} method function to be used for name
- * @name addMethod
- * @api public
- */
-var flag = require('./flag');
-
-module.exports = function (ctx, name, method) {
-  ctx[name] = function () {
-    var old_ssfi = flag(this, 'ssfi');
-    if (old_ssfi && config.includeStack === false)
-      flag(this, 'ssfi', ctx[name]);
-    var result = method.apply(this, arguments);
-    return result === undefined ? this : result;
-  };
-};
-
-},{"../config":13,"./flag":21}],20:[function(require,module,exports){
-/*!
- * Chai - addProperty utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### addProperty (ctx, name, getter)
- *
- * Adds a property to the prototype of an object.
- *
- *     utils.addProperty(chai.Assertion.prototype, 'foo', function () {
- *       var obj = utils.flag(this, 'object');
- *       new chai.Assertion(obj).to.be.instanceof(Foo);
- *     });
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.addProperty('foo', fn);
- *
- * Then can be used as any other assertion.
- *
- *     expect(myFoo).to.be.foo;
- *
- * @param {Object} ctx object to which the property is added
- * @param {String} name of property to add
- * @param {Function} getter function to be used for name
- * @name addProperty
- * @api public
- */
-
-module.exports = function (ctx, name, getter) {
-  Object.defineProperty(ctx, name,
-    { get: function () {
-        var result = getter.call(this);
-        return result === undefined ? this : result;
-      }
-    , configurable: true
-  });
-};
-
-},{}],21:[function(require,module,exports){
-/*!
- * Chai - flag utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### flag(object ,key, [value])
- *
- * Get or set a flag value on an object. If a
- * value is provided it will be set, else it will
- * return the currently set value or `undefined` if
- * the value is not set.
- *
- *     utils.flag(this, 'foo', 'bar'); // setter
- *     utils.flag(this, 'foo'); // getter, returns `bar`
- *
- * @param {Object} object (constructed Assertion
- * @param {String} key
- * @param {Mixed} value (optional)
- * @name flag
- * @api private
- */
-
-module.exports = function (obj, key, value) {
-  var flags = obj.__flags || (obj.__flags = Object.create(null));
-  if (arguments.length === 3) {
-    flags[key] = value;
-  } else {
-    return flags[key];
-  }
-};
-
-},{}],22:[function(require,module,exports){
-/*!
- * Chai - getActual utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * # getActual(object, [actual])
- *
- * Returns the `actual` value for an Assertion
- *
- * @param {Object} object (constructed Assertion)
- * @param {Arguments} chai.Assertion.prototype.assert arguments
- */
-
-module.exports = function (obj, args) {
-  return args.length > 4 ? args[4] : obj._obj;
-};
-
-},{}],23:[function(require,module,exports){
-/*!
- * Chai - getEnumerableProperties utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### .getEnumerableProperties(object)
- *
- * This allows the retrieval of enumerable property names of an object,
- * inherited or not.
- *
- * @param {Object} object
- * @returns {Array}
- * @name getEnumerableProperties
- * @api public
- */
-
-module.exports = function getEnumerableProperties(object) {
-  var result = [];
-  for (var name in object) {
-    result.push(name);
-  }
-  return result;
-};
-
-},{}],24:[function(require,module,exports){
-/*!
- * Chai - message composition utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Module dependancies
- */
-
-var flag = require('./flag')
-  , getActual = require('./getActual')
-  , inspect = require('./inspect')
-  , objDisplay = require('./objDisplay');
-
-/**
- * ### .getMessage(object, message, negateMessage)
- *
- * Construct the error message based on flags
- * and template tags. Template tags will return
- * a stringified inspection of the object referenced.
- *
- * Message template tags:
- * - `#{this}` current asserted object
- * - `#{act}` actual value
- * - `#{exp}` expected value
- *
- * @param {Object} object (constructed Assertion)
- * @param {Arguments} chai.Assertion.prototype.assert arguments
- * @name getMessage
- * @api public
- */
-
-module.exports = function (obj, args) {
-  var negate = flag(obj, 'negate')
-    , val = flag(obj, 'object')
-    , expected = args[3]
-    , actual = getActual(obj, args)
-    , msg = negate ? args[2] : args[1]
-    , flagMsg = flag(obj, 'message');
-
-  if(typeof msg === "function") msg = msg();
-  msg = msg || '';
-  msg = msg
-    .replace(/#{this}/g, objDisplay(val))
-    .replace(/#{act}/g, objDisplay(actual))
-    .replace(/#{exp}/g, objDisplay(expected));
-
-  return flagMsg ? flagMsg + ': ' + msg : msg;
-};
-
-},{"./flag":21,"./getActual":22,"./inspect":29,"./objDisplay":30}],25:[function(require,module,exports){
-/*!
- * Chai - getName utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * # getName(func)
- *
- * Gets the name of a function, in a cross-browser way.
- *
- * @param {Function} a function (usually a constructor)
- */
-
-module.exports = function (func) {
-  if (func.name) return func.name;
-
-  var match = /^\s?function ([^(]*)\(/.exec(func);
-  return match && match[1] ? match[1] : "";
-};
-
-},{}],26:[function(require,module,exports){
-/*!
- * Chai - getPathValue utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * @see https://github.com/logicalparadox/filtr
- * MIT Licensed
- */
-
-/**
- * ### .getPathValue(path, object)
- *
- * This allows the retrieval of values in an
- * object given a string path.
- *
- *     var obj = {
- *         prop1: {
- *             arr: ['a', 'b', 'c']
- *           , str: 'Hello'
- *         }
- *       , prop2: {
- *             arr: [ { nested: 'Universe' } ]
- *           , str: 'Hello again!'
- *         }
- *     }
- *
- * The following would be the results.
- *
- *     getPathValue('prop1.str', obj); // Hello
- *     getPathValue('prop1.att[2]', obj); // b
- *     getPathValue('prop2.arr[0].nested', obj); // Universe
- *
- * @param {String} path
- * @param {Object} object
- * @returns {Object} value or `undefined`
- * @name getPathValue
- * @api public
- */
-
-var getPathValue = module.exports = function (path, obj) {
-  var parsed = parsePath(path);
-  return _getPathValue(parsed, obj);
-};
-
-/*!
- * ## parsePath(path)
- *
- * Helper function used to parse string object
- * paths. Use in conjunction with `_getPathValue`.
- *
- *      var parsed = parsePath('myobject.property.subprop');
- *
- * ### Paths:
- *
- * * Can be as near infinitely deep and nested
- * * Arrays are also valid using the formal `myobject.document[3].property`.
- *
- * @param {String} path
- * @returns {Object} parsed
- * @api private
- */
-
-function parsePath (path) {
-  var str = path.replace(/\[/g, '.[')
-    , parts = str.match(/(\\\.|[^.]+?)+/g);
-  return parts.map(function (value) {
-    var re = /\[(\d+)\]$/
-      , mArr = re.exec(value)
-    if (mArr) return { i: parseFloat(mArr[1]) };
-    else return { p: value };
-  });
-};
-
-/*!
- * ## _getPathValue(parsed, obj)
- *
- * Helper companion function for `.parsePath` that returns
- * the value located at the parsed address.
- *
- *      var value = getPathValue(parsed, obj);
- *
- * @param {Object} parsed definition from `parsePath`.
- * @param {Object} object to search against
- * @returns {Object|Undefined} value
- * @api private
- */
-
-function _getPathValue (parsed, obj) {
-  var tmp = obj
-    , res;
-  for (var i = 0, l = parsed.length; i < l; i++) {
-    var part = parsed[i];
-    if (tmp) {
-      if ('undefined' !== typeof part.p)
-        tmp = tmp[part.p];
-      else if ('undefined' !== typeof part.i)
-        tmp = tmp[part.i];
-      if (i == (l - 1)) res = tmp;
-    } else {
-      res = undefined;
-    }
-  }
-  return res;
-};
-
-},{}],27:[function(require,module,exports){
-/*!
- * Chai - getProperties utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### .getProperties(object)
- *
- * This allows the retrieval of property names of an object, enumerable or not,
- * inherited or not.
- *
- * @param {Object} object
- * @returns {Array}
- * @name getProperties
- * @api public
- */
-
-module.exports = function getProperties(object) {
-  var result = Object.getOwnPropertyNames(subject);
-
-  function addProperty(property) {
-    if (result.indexOf(property) === -1) {
-      result.push(property);
-    }
-  }
-
-  var proto = Object.getPrototypeOf(subject);
-  while (proto !== null) {
-    Object.getOwnPropertyNames(proto).forEach(addProperty);
-    proto = Object.getPrototypeOf(proto);
-  }
-
-  return result;
-};
-
-},{}],28:[function(require,module,exports){
-/*!
- * chai
- * Copyright(c) 2011 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Main exports
- */
-
-var exports = module.exports = {};
-
-/*!
- * test utility
- */
-
-exports.test = require('./test');
-
-/*!
- * type utility
- */
-
-exports.type = require('./type');
-
-/*!
- * message utility
- */
-
-exports.getMessage = require('./getMessage');
-
-/*!
- * actual utility
- */
-
-exports.getActual = require('./getActual');
-
-/*!
- * Inspect util
- */
-
-exports.inspect = require('./inspect');
-
-/*!
- * Object Display util
- */
-
-exports.objDisplay = require('./objDisplay');
-
-/*!
- * Flag utility
- */
-
-exports.flag = require('./flag');
-
-/*!
- * Flag transferring utility
- */
-
-exports.transferFlags = require('./transferFlags');
-
-/*!
- * Deep equal utility
- */
-
-exports.eql = require('deep-eql');
-
-/*!
- * Deep path value
- */
-
-exports.getPathValue = require('./getPathValue');
-
-/*!
- * Function name
- */
-
-exports.getName = require('./getName');
-
-/*!
- * add Property
- */
-
-exports.addProperty = require('./addProperty');
-
-/*!
- * add Method
- */
-
-exports.addMethod = require('./addMethod');
-
-/*!
- * overwrite Property
- */
-
-exports.overwriteProperty = require('./overwriteProperty');
-
-/*!
- * overwrite Method
- */
-
-exports.overwriteMethod = require('./overwriteMethod');
-
-/*!
- * Add a chainable method
- */
-
-exports.addChainableMethod = require('./addChainableMethod');
-
-/*!
- * Overwrite chainable method
- */
-
-exports.overwriteChainableMethod = require('./overwriteChainableMethod');
-
-
-},{"./addChainableMethod":18,"./addMethod":19,"./addProperty":20,"./flag":21,"./getActual":22,"./getMessage":24,"./getName":25,"./getPathValue":26,"./inspect":29,"./objDisplay":30,"./overwriteChainableMethod":31,"./overwriteMethod":32,"./overwriteProperty":33,"./test":34,"./transferFlags":35,"./type":36,"deep-eql":37}],29:[function(require,module,exports){
-// This is (almost) directly from Node.js utils
-// https://github.com/joyent/node/blob/f8c335d0caf47f16d31413f89aa28eda3878e3aa/lib/util.js
-
-var getName = require('./getName');
-var getProperties = require('./getProperties');
-var getEnumerableProperties = require('./getEnumerableProperties');
-
-module.exports = inspect;
-
-/**
- * Echos the value of a value. Trys to print the value out
- * in the best way possible given the different types.
- *
- * @param {Object} obj The object to print out.
- * @param {Boolean} showHidden Flag that shows hidden (not enumerable)
- *    properties of objects.
- * @param {Number} depth Depth in which to descend in object. Default is 2.
- * @param {Boolean} colors Flag to turn on ANSI escape codes to color the
- *    output. Default is false (no coloring).
- */
-function inspect(obj, showHidden, depth, colors) {
-  var ctx = {
-    showHidden: showHidden,
-    seen: [],
-    stylize: function (str) { return str; }
-  };
-  return formatValue(ctx, obj, (typeof depth === 'undefined' ? 2 : depth));
-}
-
-// Returns true if object is a DOM element.
-var isDOMElement = function (object) {
-  if (typeof HTMLElement === 'object') {
-    return object instanceof HTMLElement;
-  } else {
-    return object &&
-      typeof object === 'object' &&
-      object.nodeType === 1 &&
-      typeof object.nodeName === 'string';
-  }
-};
-
-function formatValue(ctx, value, recurseTimes) {
-  // Provide a hook for user-specified inspect functions.
-  // Check that value is an object with an inspect function on it
-  if (value && typeof value.inspect === 'function' &&
-      // Filter out the util module, it's inspect function is special
-      value.inspect !== exports.inspect &&
-      // Also filter out any prototype objects using the circular check.
-      !(value.constructor && value.constructor.prototype === value)) {
-    var ret = value.inspect(recurseTimes);
-    if (typeof ret !== 'string') {
-      ret = formatValue(ctx, ret, recurseTimes);
-    }
-    return ret;
-  }
-
-  // Primitive types cannot have properties
-  var primitive = formatPrimitive(ctx, value);
-  if (primitive) {
-    return primitive;
-  }
-
-  // If this is a DOM element, try to get the outer HTML.
-  if (isDOMElement(value)) {
-    if ('outerHTML' in value) {
-      return value.outerHTML;
-      // This value does not have an outerHTML attribute,
-      //   it could still be an XML element
-    } else {
-      // Attempt to serialize it
-      try {
-        if (document.xmlVersion) {
-          var xmlSerializer = new XMLSerializer();
-          return xmlSerializer.serializeToString(value);
-        } else {
-          // Firefox 11- do not support outerHTML
-          //   It does, however, support innerHTML
-          //   Use the following to render the element
-          var ns = "http://www.w3.org/1999/xhtml";
-          var container = document.createElementNS(ns, '_');
-
-          container.appendChild(value.cloneNode(false));
-          html = container.innerHTML
-            .replace('><', '>' + value.innerHTML + '<');
-          container.innerHTML = '';
-          return html;
-        }
-      } catch (err) {
-        // This could be a non-native DOM implementation,
-        //   continue with the normal flow:
-        //   printing the element as if it is an object.
-      }
-    }
-  }
-
-  // Look up the keys of the object.
-  var visibleKeys = getEnumerableProperties(value);
-  var keys = ctx.showHidden ? getProperties(value) : visibleKeys;
-
-  // Some type of object without properties can be shortcutted.
-  // In IE, errors have a single `stack` property, or if they are vanilla `Error`,
-  // a `stack` plus `description` property; ignore those for consistency.
-  if (keys.length === 0 || (isError(value) && (
-      (keys.length === 1 && keys[0] === 'stack') ||
-      (keys.length === 2 && keys[0] === 'description' && keys[1] === 'stack')
-     ))) {
-    if (typeof value === 'function') {
-      var name = getName(value);
-      var nameSuffix = name ? ': ' + name : '';
-      return ctx.stylize('[Function' + nameSuffix + ']', 'special');
-    }
-    if (isRegExp(value)) {
-      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-    }
-    if (isDate(value)) {
-      return ctx.stylize(Date.prototype.toUTCString.call(value), 'date');
-    }
-    if (isError(value)) {
-      return formatError(value);
-    }
-  }
-
-  var base = '', array = false, braces = ['{', '}'];
-
-  // Make Array say that they are Array
-  if (isArray(value)) {
-    array = true;
-    braces = ['[', ']'];
-  }
-
-  // Make functions say that they are functions
-  if (typeof value === 'function') {
-    var name = getName(value);
-    var nameSuffix = name ? ': ' + name : '';
-    base = ' [Function' + nameSuffix + ']';
-  }
-
-  // Make RegExps say that they are RegExps
-  if (isRegExp(value)) {
-    base = ' ' + RegExp.prototype.toString.call(value);
-  }
-
-  // Make dates with properties first say the date
-  if (isDate(value)) {
-    base = ' ' + Date.prototype.toUTCString.call(value);
-  }
-
-  // Make error with message first say the error
-  if (isError(value)) {
-    return formatError(value);
-  }
-
-  if (keys.length === 0 && (!array || value.length == 0)) {
-    return braces[0] + base + braces[1];
-  }
-
-  if (recurseTimes < 0) {
-    if (isRegExp(value)) {
-      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-    } else {
-      return ctx.stylize('[Object]', 'special');
-    }
-  }
-
-  ctx.seen.push(value);
-
-  var output;
-  if (array) {
-    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
-  } else {
-    output = keys.map(function(key) {
-      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
-    });
-  }
-
-  ctx.seen.pop();
-
-  return reduceToSingleString(output, base, braces);
-}
-
-
-function formatPrimitive(ctx, value) {
-  switch (typeof value) {
-    case 'undefined':
-      return ctx.stylize('undefined', 'undefined');
-
-    case 'string':
-      var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
-                                               .replace(/'/g, "\\'")
-                                               .replace(/\\"/g, '"') + '\'';
-      return ctx.stylize(simple, 'string');
-
-    case 'number':
-      return ctx.stylize('' + value, 'number');
-
-    case 'boolean':
-      return ctx.stylize('' + value, 'boolean');
-  }
-  // For some reason typeof null is "object", so special case here.
-  if (value === null) {
-    return ctx.stylize('null', 'null');
-  }
-}
-
-
-function formatError(value) {
-  return '[' + Error.prototype.toString.call(value) + ']';
-}
-
-
-function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
-  var output = [];
-  for (var i = 0, l = value.length; i < l; ++i) {
-    if (Object.prototype.hasOwnProperty.call(value, String(i))) {
-      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
-          String(i), true));
-    } else {
-      output.push('');
-    }
-  }
-  keys.forEach(function(key) {
-    if (!key.match(/^\d+$/)) {
-      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
-          key, true));
-    }
-  });
-  return output;
-}
-
-
-function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
-  var name, str;
-  if (value.__lookupGetter__) {
-    if (value.__lookupGetter__(key)) {
-      if (value.__lookupSetter__(key)) {
-        str = ctx.stylize('[Getter/Setter]', 'special');
-      } else {
-        str = ctx.stylize('[Getter]', 'special');
-      }
-    } else {
-      if (value.__lookupSetter__(key)) {
-        str = ctx.stylize('[Setter]', 'special');
-      }
-    }
-  }
-  if (visibleKeys.indexOf(key) < 0) {
-    name = '[' + key + ']';
-  }
-  if (!str) {
-    if (ctx.seen.indexOf(value[key]) < 0) {
-      if (recurseTimes === null) {
-        str = formatValue(ctx, value[key], null);
-      } else {
-        str = formatValue(ctx, value[key], recurseTimes - 1);
-      }
-      if (str.indexOf('\n') > -1) {
-        if (array) {
-          str = str.split('\n').map(function(line) {
-            return '  ' + line;
-          }).join('\n').substr(2);
-        } else {
-          str = '\n' + str.split('\n').map(function(line) {
-            return '   ' + line;
-          }).join('\n');
-        }
-      }
-    } else {
-      str = ctx.stylize('[Circular]', 'special');
-    }
-  }
-  if (typeof name === 'undefined') {
-    if (array && key.match(/^\d+$/)) {
-      return str;
-    }
-    name = JSON.stringify('' + key);
-    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
-      name = name.substr(1, name.length - 2);
-      name = ctx.stylize(name, 'name');
-    } else {
-      name = name.replace(/'/g, "\\'")
-                 .replace(/\\"/g, '"')
-                 .replace(/(^"|"$)/g, "'");
-      name = ctx.stylize(name, 'string');
-    }
-  }
-
-  return name + ': ' + str;
-}
-
-
-function reduceToSingleString(output, base, braces) {
-  var numLinesEst = 0;
-  var length = output.reduce(function(prev, cur) {
-    numLinesEst++;
-    if (cur.indexOf('\n') >= 0) numLinesEst++;
-    return prev + cur.length + 1;
-  }, 0);
-
-  if (length > 60) {
-    return braces[0] +
-           (base === '' ? '' : base + '\n ') +
-           ' ' +
-           output.join(',\n  ') +
-           ' ' +
-           braces[1];
-  }
-
-  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
-}
-
-function isArray(ar) {
-  return Array.isArray(ar) ||
-         (typeof ar === 'object' && objectToString(ar) === '[object Array]');
-}
-
-function isRegExp(re) {
-  return typeof re === 'object' && objectToString(re) === '[object RegExp]';
-}
-
-function isDate(d) {
-  return typeof d === 'object' && objectToString(d) === '[object Date]';
-}
-
-function isError(e) {
-  return typeof e === 'object' && objectToString(e) === '[object Error]';
-}
-
-function objectToString(o) {
-  return Object.prototype.toString.call(o);
-}
-
-},{"./getEnumerableProperties":23,"./getName":25,"./getProperties":27}],30:[function(require,module,exports){
-/*!
- * Chai - flag utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Module dependancies
- */
-
-var inspect = require('./inspect');
-var config = require('../config');
-
-/**
- * ### .objDisplay (object)
- *
- * Determines if an object or an array matches
- * criteria to be inspected in-line for error
- * messages or should be truncated.
- *
- * @param {Mixed} javascript object to inspect
- * @name objDisplay
- * @api public
- */
-
-module.exports = function (obj) {
-  var str = inspect(obj)
-    , type = Object.prototype.toString.call(obj);
-
-  if (config.truncateThreshold && str.length >= config.truncateThreshold) {
-    if (type === '[object Function]') {
-      return !obj.name || obj.name === ''
-        ? '[Function]'
-        : '[Function: ' + obj.name + ']';
-    } else if (type === '[object Array]') {
-      return '[ Array(' + obj.length + ') ]';
-    } else if (type === '[object Object]') {
-      var keys = Object.keys(obj)
-        , kstr = keys.length > 2
-          ? keys.splice(0, 2).join(', ') + ', ...'
-          : keys.join(', ');
-      return '{ Object (' + kstr + ') }';
-    } else {
-      return str;
-    }
-  } else {
-    return str;
-  }
-};
-
-},{"../config":13,"./inspect":29}],31:[function(require,module,exports){
-/*!
- * Chai - overwriteChainableMethod utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### overwriteChainableMethod (ctx, name, fn)
- *
- * Overwites an already existing chainable method
- * and provides access to the previous function or
- * property.  Must return functions to be used for
- * name.
- *
- *     utils.overwriteChainableMethod(chai.Assertion.prototype, 'length',
- *       function (_super) {
- *       }
- *     , function (_super) {
- *       }
- *     );
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.overwriteChainableMethod('foo', fn, fn);
- *
- * Then can be used as any other assertion.
- *
- *     expect(myFoo).to.have.length(3);
- *     expect(myFoo).to.have.length.above(3);
- *
- * @param {Object} ctx object whose method / property is to be overwritten
- * @param {String} name of method / property to overwrite
- * @param {Function} method function that returns a function to be used for name
- * @param {Function} chainingBehavior function that returns a function to be used for property
- * @name overwriteChainableMethod
- * @api public
- */
-
-module.exports = function (ctx, name, method, chainingBehavior) {
-  var chainableBehavior = ctx.__methods[name];
-
-  var _chainingBehavior = chainableBehavior.chainingBehavior;
-  chainableBehavior.chainingBehavior = function () {
-    var result = chainingBehavior(_chainingBehavior).call(this);
-    return result === undefined ? this : result;
-  };
-
-  var _method = chainableBehavior.method;
-  chainableBehavior.method = function () {
-    var result = method(_method).apply(this, arguments);
-    return result === undefined ? this : result;
-  };
-};
-
-},{}],32:[function(require,module,exports){
-/*!
- * Chai - overwriteMethod utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### overwriteMethod (ctx, name, fn)
- *
- * Overwites an already existing method and provides
- * access to previous function. Must return function
- * to be used for name.
- *
- *     utils.overwriteMethod(chai.Assertion.prototype, 'equal', function (_super) {
- *       return function (str) {
- *         var obj = utils.flag(this, 'object');
- *         if (obj instanceof Foo) {
- *           new chai.Assertion(obj.value).to.equal(str);
- *         } else {
- *           _super.apply(this, arguments);
- *         }
- *       }
- *     });
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.overwriteMethod('foo', fn);
- *
- * Then can be used as any other assertion.
- *
- *     expect(myFoo).to.equal('bar');
- *
- * @param {Object} ctx object whose method is to be overwritten
- * @param {String} name of method to overwrite
- * @param {Function} method function that returns a function to be used for name
- * @name overwriteMethod
- * @api public
- */
-
-module.exports = function (ctx, name, method) {
-  var _method = ctx[name]
-    , _super = function () { return this; };
-
-  if (_method && 'function' === typeof _method)
-    _super = _method;
-
-  ctx[name] = function () {
-    var result = method(_super).apply(this, arguments);
-    return result === undefined ? this : result;
-  }
-};
-
-},{}],33:[function(require,module,exports){
-/*!
- * Chai - overwriteProperty utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### overwriteProperty (ctx, name, fn)
- *
- * Overwites an already existing property getter and provides
- * access to previous value. Must return function to use as getter.
- *
- *     utils.overwriteProperty(chai.Assertion.prototype, 'ok', function (_super) {
- *       return function () {
- *         var obj = utils.flag(this, 'object');
- *         if (obj instanceof Foo) {
- *           new chai.Assertion(obj.name).to.equal('bar');
- *         } else {
- *           _super.call(this);
- *         }
- *       }
- *     });
- *
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.overwriteProperty('foo', fn);
- *
- * Then can be used as any other assertion.
- *
- *     expect(myFoo).to.be.ok;
- *
- * @param {Object} ctx object whose property is to be overwritten
- * @param {String} name of property to overwrite
- * @param {Function} getter function that returns a getter function to be used for name
- * @name overwriteProperty
- * @api public
- */
-
-module.exports = function (ctx, name, getter) {
-  var _get = Object.getOwnPropertyDescriptor(ctx, name)
-    , _super = function () {};
-
-  if (_get && 'function' === typeof _get.get)
-    _super = _get.get
-
-  Object.defineProperty(ctx, name,
-    { get: function () {
-        var result = getter(_super).call(this);
-        return result === undefined ? this : result;
-      }
-    , configurable: true
-  });
-};
-
-},{}],34:[function(require,module,exports){
-/*!
- * Chai - test utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Module dependancies
- */
-
-var flag = require('./flag');
-
-/**
- * # test(object, expression)
- *
- * Test and object for expression.
- *
- * @param {Object} object (constructed Assertion)
- * @param {Arguments} chai.Assertion.prototype.assert arguments
- */
-
-module.exports = function (obj, args) {
-  var negate = flag(obj, 'negate')
-    , expr = args[0];
-  return negate ? !expr : expr;
-};
-
-},{"./flag":21}],35:[function(require,module,exports){
-/*!
- * Chai - transferFlags utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### transferFlags(assertion, object, includeAll = true)
- *
- * Transfer all the flags for `assertion` to `object`. If
- * `includeAll` is set to `false`, then the base Chai
- * assertion flags (namely `object`, `ssfi`, and `message`)
- * will not be transferred.
- *
- *
- *     var newAssertion = new Assertion();
- *     utils.transferFlags(assertion, newAssertion);
- *
- *     var anotherAsseriton = new Assertion(myObj);
- *     utils.transferFlags(assertion, anotherAssertion, false);
- *
- * @param {Assertion} assertion the assertion to transfer the flags from
- * @param {Object} object the object to transfer the flags too; usually a new assertion
- * @param {Boolean} includeAll
- * @name getAllFlags
- * @api private
- */
-
-module.exports = function (assertion, object, includeAll) {
-  var flags = assertion.__flags || (assertion.__flags = Object.create(null));
-
-  if (!object.__flags) {
-    object.__flags = Object.create(null);
-  }
-
-  includeAll = arguments.length === 3 ? includeAll : true;
-
-  for (var flag in flags) {
-    if (includeAll ||
-        (flag !== 'object' && flag !== 'ssfi' && flag != 'message')) {
-      object.__flags[flag] = flags[flag];
-    }
-  }
-};
-
-},{}],36:[function(require,module,exports){
-/*!
- * Chai - type utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Detectable javascript natives
- */
-
-var natives = {
-    '[object Arguments]': 'arguments'
-  , '[object Array]': 'array'
-  , '[object Date]': 'date'
-  , '[object Function]': 'function'
-  , '[object Number]': 'number'
-  , '[object RegExp]': 'regexp'
-  , '[object String]': 'string'
-};
-
-/**
- * ### type(object)
- *
- * Better implementation of `typeof` detection that can
- * be used cross-browser. Handles the inconsistencies of
- * Array, `null`, and `undefined` detection.
- *
- *     utils.type({}) // 'object'
- *     utils.type(null) // `null'
- *     utils.type(undefined) // `undefined`
- *     utils.type([]) // `array`
- *
- * @param {Mixed} object to detect type of
- * @name type
- * @api private
- */
-
-module.exports = function (obj) {
-  var str = Object.prototype.toString.call(obj);
-  if (natives[str]) return natives[str];
-  if (obj === null) return 'null';
-  if (obj === undefined) return 'undefined';
-  if (obj === Object(obj)) return 'object';
-  return typeof obj;
-};
-
-},{}],37:[function(require,module,exports){
-module.exports = require('./lib/eql');
-
-},{"./lib/eql":38}],38:[function(require,module,exports){
-/*!
- * deep-eql
- * Copyright(c) 2013 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Module dependencies
- */
-
-var type = require('type-detect');
-
-/*!
- * Buffer.isBuffer browser shim
- */
-
-var Buffer;
-try { Buffer = require('buffer').Buffer; }
-catch(ex) {
-  Buffer = {};
-  Buffer.isBuffer = function() { return false; }
-}
-
-/*!
- * Primary Export
- */
-
-module.exports = deepEqual;
-
-/**
- * Assert super-strict (egal) equality between
- * two objects of any type.
- *
- * @param {Mixed} a
- * @param {Mixed} b
- * @param {Array} memoised (optional)
- * @return {Boolean} equal match
- */
-
-function deepEqual(a, b, m) {
-  if (sameValue(a, b)) {
-    return true;
-  } else if ('date' === type(a)) {
-    return dateEqual(a, b);
-  } else if ('regexp' === type(a)) {
-    return regexpEqual(a, b);
-  } else if (Buffer.isBuffer(a)) {
-    return bufferEqual(a, b);
-  } else if ('arguments' === type(a)) {
-    return argumentsEqual(a, b, m);
-  } else if (!typeEqual(a, b)) {
-    return false;
-  } else if (('object' !== type(a) && 'object' !== type(b))
-  && ('array' !== type(a) && 'array' !== type(b))) {
-    return sameValue(a, b);
-  } else {
-    return objectEqual(a, b, m);
-  }
-}
-
-/*!
- * Strict (egal) equality test. Ensures that NaN always
- * equals NaN and `-0` does not equal `+0`.
- *
- * @param {Mixed} a
- * @param {Mixed} b
- * @return {Boolean} equal match
- */
-
-function sameValue(a, b) {
-  if (a === b) return a !== 0 || 1 / a === 1 / b;
-  return a !== a && b !== b;
-}
-
-/*!
- * Compare the types of two given objects and
- * return if they are equal. Note that an Array
- * has a type of `array` (not `object`) and arguments
- * have a type of `arguments` (not `array`/`object`).
- *
- * @param {Mixed} a
- * @param {Mixed} b
- * @return {Boolean} result
- */
-
-function typeEqual(a, b) {
-  return type(a) === type(b);
-}
-
-/*!
- * Compare two Date objects by asserting that
- * the time values are equal using `saveValue`.
- *
- * @param {Date} a
- * @param {Date} b
- * @return {Boolean} result
- */
-
-function dateEqual(a, b) {
-  if ('date' !== type(b)) return false;
-  return sameValue(a.getTime(), b.getTime());
-}
-
-/*!
- * Compare two regular expressions by converting them
- * to string and checking for `sameValue`.
- *
- * @param {RegExp} a
- * @param {RegExp} b
- * @return {Boolean} result
- */
-
-function regexpEqual(a, b) {
-  if ('regexp' !== type(b)) return false;
-  return sameValue(a.toString(), b.toString());
-}
-
-/*!
- * Assert deep equality of two `arguments` objects.
- * Unfortunately, these must be sliced to arrays
- * prior to test to ensure no bad behavior.
- *
- * @param {Arguments} a
- * @param {Arguments} b
- * @param {Array} memoize (optional)
- * @return {Boolean} result
- */
-
-function argumentsEqual(a, b, m) {
-  if ('arguments' !== type(b)) return false;
-  a = [].slice.call(a);
-  b = [].slice.call(b);
-  return deepEqual(a, b, m);
-}
-
-/*!
- * Get enumerable properties of a given object.
- *
- * @param {Object} a
- * @return {Array} property names
- */
-
-function enumerable(a) {
-  var res = [];
-  for (var key in a) res.push(key);
-  return res;
-}
-
-/*!
- * Simple equality for flat iterable objects
- * such as Arrays or Node.js buffers.
- *
- * @param {Iterable} a
- * @param {Iterable} b
- * @return {Boolean} result
- */
-
-function iterableEqual(a, b) {
-  if (a.length !==  b.length) return false;
-
-  var i = 0;
-  var match = true;
-
-  for (; i < a.length; i++) {
-    if (a[i] !== b[i]) {
-      match = false;
-      break;
-    }
-  }
-
-  return match;
-}
-
-/*!
- * Extension to `iterableEqual` specifically
- * for Node.js Buffers.
- *
- * @param {Buffer} a
- * @param {Mixed} b
- * @return {Boolean} result
- */
-
-function bufferEqual(a, b) {
-  if (!Buffer.isBuffer(b)) return false;
-  return iterableEqual(a, b);
-}
-
-/*!
- * Block for `objectEqual` ensuring non-existing
- * values don't get in.
- *
- * @param {Mixed} object
- * @return {Boolean} result
- */
-
-function isValue(a) {
-  return a !== null && a !== undefined;
-}
-
-/*!
- * Recursively check the equality of two objects.
- * Once basic sameness has been established it will
- * defer to `deepEqual` for each enumerable key
- * in the object.
- *
- * @param {Mixed} a
- * @param {Mixed} b
- * @return {Boolean} result
- */
-
-function objectEqual(a, b, m) {
-  if (!isValue(a) || !isValue(b)) {
-    return false;
-  }
-
-  if (a.prototype !== b.prototype) {
-    return false;
-  }
-
-  var i;
-  if (m) {
-    for (i = 0; i < m.length; i++) {
-      if ((m[i][0] === a && m[i][1] === b)
-      ||  (m[i][0] === b && m[i][1] === a)) {
-        return true;
-      }
-    }
-  } else {
-    m = [];
-  }
-
-  try {
-    var ka = enumerable(a);
-    var kb = enumerable(b);
-  } catch (ex) {
-    return false;
-  }
-
-  ka.sort();
-  kb.sort();
-
-  if (!iterableEqual(ka, kb)) {
-    return false;
-  }
-
-  m.push([ a, b ]);
-
-  var key;
-  for (i = ka.length - 1; i >= 0; i--) {
-    key = ka[i];
-    if (!deepEqual(a[key], b[key], m)) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-},{"buffer":8,"type-detect":48}],39:[function(require,module,exports){
-exports.read = function (buffer, offset, isLE, mLen, nBytes) {
-  var e, m
-  var eLen = (nBytes * 8) - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var nBits = -7
-  var i = isLE ? (nBytes - 1) : 0
-  var d = isLE ? -1 : 1
-  var s = buffer[offset + i]
-
-  i += d
-
-  e = s & ((1 << (-nBits)) - 1)
-  s >>= (-nBits)
-  nBits += eLen
-  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
-
-  m = e & ((1 << (-nBits)) - 1)
-  e >>= (-nBits)
-  nBits += mLen
-  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
-
-  if (e === 0) {
-    e = 1 - eBias
-  } else if (e === eMax) {
-    return m ? NaN : ((s ? -1 : 1) * Infinity)
-  } else {
-    m = m + Math.pow(2, mLen)
-    e = e - eBias
-  }
-  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-}
-
-exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
-  var e, m, c
-  var eLen = (nBytes * 8) - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
-  var i = isLE ? 0 : (nBytes - 1)
-  var d = isLE ? 1 : -1
-  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
-
-  value = Math.abs(value)
-
-  if (isNaN(value) || value === Infinity) {
-    m = isNaN(value) ? 1 : 0
-    e = eMax
-  } else {
-    e = Math.floor(Math.log(value) / Math.LN2)
-    if (value * (c = Math.pow(2, -e)) < 1) {
-      e--
-      c *= 2
-    }
-    if (e + eBias >= 1) {
-      value += rt / c
-    } else {
-      value += rt * Math.pow(2, 1 - eBias)
-    }
-    if (value * c >= 2) {
-      e++
-      c /= 2
-    }
-
-    if (e + eBias >= eMax) {
-      m = 0
-      e = eMax
-    } else if (e + eBias >= 1) {
-      m = ((value * c) - 1) * Math.pow(2, mLen)
-      e = e + eBias
-    } else {
-      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
-      e = 0
-    }
-  }
-
-  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
-
-  e = (e << mLen) | m
-  eLen += mLen
-  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
-
-  buffer[offset + i - d] |= s * 128
-}
-
-},{}],40:[function(require,module,exports){
-;(function () { // closure for web browsers
-
-if (typeof module === 'object' && module.exports) {
-  module.exports = LRUCache
-} else {
-  // just set the global for non-node platforms.
-  this.LRUCache = LRUCache
-}
-
-function hOP (obj, key) {
-  return Object.prototype.hasOwnProperty.call(obj, key)
-}
-
-function naiveLength () { return 1 }
-
-function LRUCache (options) {
-  if (!(this instanceof LRUCache))
-    return new LRUCache(options)
-
-  if (typeof options === 'number')
-    options = { max: options }
-
-  if (!options)
-    options = {}
-
-  this._max = options.max
-  // Kind of weird to have a default max of Infinity, but oh well.
-  if (!this._max || !(typeof this._max === "number") || this._max <= 0 )
-    this._max = Infinity
-
-  this._lengthCalculator = options.length || naiveLength
-  if (typeof this._lengthCalculator !== "function")
-    this._lengthCalculator = naiveLength
-
-  this._allowStale = options.stale || false
-  this._maxAge = options.maxAge || null
-  this._dispose = options.dispose
-  this.reset()
-}
-
-// resize the cache when the max changes.
-Object.defineProperty(LRUCache.prototype, "max",
-  { set : function (mL) {
-      if (!mL || !(typeof mL === "number") || mL <= 0 ) mL = Infinity
-      this._max = mL
-      if (this._length > this._max) trim(this)
-    }
-  , get : function () { return this._max }
-  , enumerable : true
-  })
-
-// resize the cache when the lengthCalculator changes.
-Object.defineProperty(LRUCache.prototype, "lengthCalculator",
-  { set : function (lC) {
-      if (typeof lC !== "function") {
-        this._lengthCalculator = naiveLength
-        this._length = this._itemCount
-        for (var key in this._cache) {
-          this._cache[key].length = 1
-        }
-      } else {
-        this._lengthCalculator = lC
-        this._length = 0
-        for (var key in this._cache) {
-          this._cache[key].length = this._lengthCalculator(this._cache[key].value)
-          this._length += this._cache[key].length
-        }
-      }
-
-      if (this._length > this._max) trim(this)
-    }
-  , get : function () { return this._lengthCalculator }
-  , enumerable : true
-  })
-
-Object.defineProperty(LRUCache.prototype, "length",
-  { get : function () { return this._length }
-  , enumerable : true
-  })
-
-
-Object.defineProperty(LRUCache.prototype, "itemCount",
-  { get : function () { return this._itemCount }
-  , enumerable : true
-  })
-
-LRUCache.prototype.forEach = function (fn, thisp) {
-  thisp = thisp || this
-  var i = 0;
-  for (var k = this._mru - 1; k >= 0 && i < this._itemCount; k--) if (this._lruList[k]) {
-    i++
-    var hit = this._lruList[k]
-    if (this._maxAge && (Date.now() - hit.now > this._maxAge)) {
-      del(this, hit)
-      if (!this._allowStale) hit = undefined
-    }
-    if (hit) {
-      fn.call(thisp, hit.value, hit.key, this)
-    }
-  }
-}
-
-LRUCache.prototype.keys = function () {
-  var keys = new Array(this._itemCount)
-  var i = 0
-  for (var k = this._mru - 1; k >= 0 && i < this._itemCount; k--) if (this._lruList[k]) {
-    var hit = this._lruList[k]
-    keys[i++] = hit.key
-  }
-  return keys
-}
-
-LRUCache.prototype.values = function () {
-  var values = new Array(this._itemCount)
-  var i = 0
-  for (var k = this._mru - 1; k >= 0 && i < this._itemCount; k--) if (this._lruList[k]) {
-    var hit = this._lruList[k]
-    values[i++] = hit.value
-  }
-  return values
-}
-
-LRUCache.prototype.reset = function () {
-  if (this._dispose && this._cache) {
-    for (var k in this._cache) {
-      this._dispose(k, this._cache[k].value)
-    }
-  }
-
-  this._cache = Object.create(null) // hash of items by key
-  this._lruList = Object.create(null) // list of items in order of use recency
-  this._mru = 0 // most recently used
-  this._lru = 0 // least recently used
-  this._length = 0 // number of items in the list
-  this._itemCount = 0
-}
-
-// Provided for debugging/dev purposes only. No promises whatsoever that
-// this API stays stable.
-LRUCache.prototype.dump = function () {
-  return this._cache
-}
-
-LRUCache.prototype.dumpLru = function () {
-  return this._lruList
-}
-
-LRUCache.prototype.set = function (key, value) {
-  if (hOP(this._cache, key)) {
-    // dispose of the old one before overwriting
-    if (this._dispose) this._dispose(key, this._cache[key].value)
-    if (this._maxAge) this._cache[key].now = Date.now()
-    this._cache[key].value = value
-    this.get(key)
-    return true
-  }
-
-  var len = this._lengthCalculator(value)
-  var age = this._maxAge ? Date.now() : 0
-  var hit = new Entry(key, value, this._mru++, len, age)
-
-  // oversized objects fall out of cache automatically.
-  if (hit.length > this._max) {
-    if (this._dispose) this._dispose(key, value)
-    return false
-  }
-
-  this._length += hit.length
-  this._lruList[hit.lu] = this._cache[key] = hit
-  this._itemCount ++
-
-  if (this._length > this._max) trim(this)
-  return true
-}
-
-LRUCache.prototype.has = function (key) {
-  if (!hOP(this._cache, key)) return false
-  var hit = this._cache[key]
-  if (this._maxAge && (Date.now() - hit.now > this._maxAge)) {
-    return false
-  }
-  return true
-}
-
-LRUCache.prototype.get = function (key) {
-  return get(this, key, true)
-}
-
-LRUCache.prototype.peek = function (key) {
-  return get(this, key, false)
-}
-
-LRUCache.prototype.pop = function () {
-  var hit = this._lruList[this._lru]
-  del(this, hit)
-  return hit || null
-}
-
-LRUCache.prototype.del = function (key) {
-  del(this, this._cache[key])
-}
-
-function get (self, key, doUse) {
-  var hit = self._cache[key]
-  if (hit) {
-    if (self._maxAge && (Date.now() - hit.now > self._maxAge)) {
-      del(self, hit)
-      if (!self._allowStale) hit = undefined
-    } else {
-      if (doUse) use(self, hit)
-    }
-    if (hit) hit = hit.value
-  }
-  return hit
-}
-
-function use (self, hit) {
-  shiftLU(self, hit)
-  hit.lu = self._mru ++
-  if (self._maxAge) hit.now = Date.now()
-  self._lruList[hit.lu] = hit
-}
-
-function trim (self) {
-  while (self._lru < self._mru && self._length > self._max)
-    del(self, self._lruList[self._lru])
-}
-
-function shiftLU (self, hit) {
-  delete self._lruList[ hit.lu ]
-  while (self._lru < self._mru && !self._lruList[self._lru]) self._lru ++
-}
-
-function del (self, hit) {
-  if (hit) {
-    if (self._dispose) self._dispose(hit.key, hit.value)
-    self._length -= hit.length
-    self._itemCount --
-    delete self._cache[ hit.key ]
-    shiftLU(self, hit)
-  }
-}
-
-// classy, since V8 prefers predictable objects.
-function Entry (key, value, lu, length, now) {
-  this.key = key
-  this.value = value
-  this.lu = lu
-  this.length = length
-  this.now = now
-}
-
-})()
-
-},{}],41:[function(require,module,exports){
-;(function (require, exports, module, platform) {
-
-if (module) module.exports = minimatch
-else exports.minimatch = minimatch
-
-if (!require) {
-  require = function (id) {
-    switch (id) {
-      case "sigmund": return function sigmund (obj) {
-        return JSON.stringify(obj)
-      }
-      case "path": return { basename: function (f) {
-        f = f.split(/[\/\\]/)
-        var e = f.pop()
-        if (!e) e = f.pop()
-        return e
-      }}
-      case "lru-cache": return function LRUCache () {
-        // not quite an LRU, but still space-limited.
-        var cache = {}
-        var cnt = 0
-        this.set = function (k, v) {
-          cnt ++
-          if (cnt >= 100) cache = {}
-          cache[k] = v
-        }
-        this.get = function (k) { return cache[k] }
-      }
-    }
-  }
-}
-
-minimatch.Minimatch = Minimatch
-
-var LRU = require("lru-cache")
-  , cache = minimatch.cache = new LRU({max: 100})
-  , GLOBSTAR = minimatch.GLOBSTAR = Minimatch.GLOBSTAR = {}
-  , sigmund = require("sigmund")
-
-var path = require("path")
-  // any single thing other than /
-  // don't need to escape / when using new RegExp()
-  , qmark = "[^/]"
-
-  // * => any number of characters
-  , star = qmark + "*?"
-
-  // ** when dots are allowed.  Anything goes, except .. and .
-  // not (^ or / followed by one or two dots followed by $ or /),
-  // followed by anything, any number of times.
-  , twoStarDot = "(?:(?!(?:\\\/|^)(?:\\.{1,2})($|\\\/)).)*?"
-
-  // not a ^ or / followed by a dot,
-  // followed by anything, any number of times.
-  , twoStarNoDot = "(?:(?!(?:\\\/|^)\\.).)*?"
-
-  // characters that need to be escaped in RegExp.
-  , reSpecials = charSet("().*{}+?[]^$\\!")
-
-// "abc" -> { a:true, b:true, c:true }
-function charSet (s) {
-  return s.split("").reduce(function (set, c) {
-    set[c] = true
-    return set
-  }, {})
-}
-
-// normalizes slashes.
-var slashSplit = /\/+/
-
-minimatch.filter = filter
-function filter (pattern, options) {
-  options = options || {}
-  return function (p, i, list) {
-    return minimatch(p, pattern, options)
-  }
-}
-
-function ext (a, b) {
-  a = a || {}
-  b = b || {}
-  var t = {}
-  Object.keys(b).forEach(function (k) {
-    t[k] = b[k]
-  })
-  Object.keys(a).forEach(function (k) {
-    t[k] = a[k]
-  })
-  return t
-}
-
-minimatch.defaults = function (def) {
-  if (!def || !Object.keys(def).length) return minimatch
-
-  var orig = minimatch
-
-  var m = function minimatch (p, pattern, options) {
-    return orig.minimatch(p, pattern, ext(def, options))
-  }
-
-  m.Minimatch = function Minimatch (pattern, options) {
-    return new orig.Minimatch(pattern, ext(def, options))
-  }
-
-  return m
-}
-
-Minimatch.defaults = function (def) {
-  if (!def || !Object.keys(def).length) return Minimatch
-  return minimatch.defaults(def).Minimatch
-}
-
-
-function minimatch (p, pattern, options) {
-  if (typeof pattern !== "string") {
-    throw new TypeError("glob pattern string required")
-  }
-
-  if (!options) options = {}
-
-  // shortcut: comments match nothing.
-  if (!options.nocomment && pattern.charAt(0) === "#") {
-    return false
-  }
-
-  // "" only matches ""
-  if (pattern.trim() === "") return p === ""
-
-  return new Minimatch(pattern, options).match(p)
-}
-
-function Minimatch (pattern, options) {
-  if (!(this instanceof Minimatch)) {
-    return new Minimatch(pattern, options, cache)
-  }
-
-  if (typeof pattern !== "string") {
-    throw new TypeError("glob pattern string required")
-  }
-
-  if (!options) options = {}
-  pattern = pattern.trim()
-
-  // windows: need to use /, not \
-  // On other platforms, \ is a valid (albeit bad) filename char.
-  if (platform === "win32") {
-    pattern = pattern.split("\\").join("/")
-  }
-
-  // lru storage.
-  // these things aren't particularly big, but walking down the string
-  // and turning it into a regexp can get pretty costly.
-  var cacheKey = pattern + "\n" + sigmund(options)
-  var cached = minimatch.cache.get(cacheKey)
-  if (cached) return cached
-  minimatch.cache.set(cacheKey, this)
-
-  this.options = options
-  this.set = []
-  this.pattern = pattern
-  this.regexp = null
-  this.negate = false
-  this.comment = false
-  this.empty = false
-
-  // make the set of regexps etc.
-  this.make()
-}
-
-Minimatch.prototype.debug = function() {}
-
-Minimatch.prototype.make = make
-function make () {
-  // don't do it more than once.
-  if (this._made) return
-
-  var pattern = this.pattern
-  var options = this.options
-
-  // empty patterns and comments match nothing.
-  if (!options.nocomment && pattern.charAt(0) === "#") {
-    this.comment = true
-    return
-  }
-  if (!pattern) {
-    this.empty = true
-    return
-  }
-
-  // step 1: figure out negation, etc.
-  this.parseNegate()
-
-  // step 2: expand braces
-  var set = this.globSet = this.braceExpand()
-
-  if (options.debug) this.debug = console.error
-
-  this.debug(this.pattern, set)
-
-  // step 3: now we have a set, so turn each one into a series of path-portion
-  // matching patterns.
-  // These will be regexps, except in the case of "**", which is
-  // set to the GLOBSTAR object for globstar behavior,
-  // and will not contain any / characters
-  set = this.globParts = set.map(function (s) {
-    return s.split(slashSplit)
-  })
-
-  this.debug(this.pattern, set)
-
-  // glob --> regexps
-  set = set.map(function (s, si, set) {
-    return s.map(this.parse, this)
-  }, this)
-
-  this.debug(this.pattern, set)
-
-  // filter out everything that didn't compile properly.
-  set = set.filter(function (s) {
-    return -1 === s.indexOf(false)
-  })
-
-  this.debug(this.pattern, set)
-
-  this.set = set
-}
-
-Minimatch.prototype.parseNegate = parseNegate
-function parseNegate () {
-  var pattern = this.pattern
-    , negate = false
-    , options = this.options
-    , negateOffset = 0
-
-  if (options.nonegate) return
-
-  for ( var i = 0, l = pattern.length
-      ; i < l && pattern.charAt(i) === "!"
-      ; i ++) {
-    negate = !negate
-    negateOffset ++
-  }
-
-  if (negateOffset) this.pattern = pattern.substr(negateOffset)
-  this.negate = negate
-}
-
-// Brace expansion:
-// a{b,c}d -> abd acd
-// a{b,}c -> abc ac
-// a{0..3}d -> a0d a1d a2d a3d
-// a{b,c{d,e}f}g -> abg acdfg acefg
-// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg
-//
-// Invalid sets are not expanded.
-// a{2..}b -> a{2..}b
-// a{b}c -> a{b}c
-minimatch.braceExpand = function (pattern, options) {
-  return new Minimatch(pattern, options).braceExpand()
-}
-
-Minimatch.prototype.braceExpand = braceExpand
-
-function pad(n, width, z) {
-  z = z || '0';
-  n = n + '';
-  return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
-}
-
-function braceExpand (pattern, options) {
-  options = options || this.options
-  pattern = typeof pattern === "undefined"
-    ? this.pattern : pattern
-
-  if (typeof pattern === "undefined") {
-    throw new Error("undefined pattern")
-  }
-
-  if (options.nobrace ||
-      !pattern.match(/\{.*\}/)) {
-    // shortcut. no need to expand.
-    return [pattern]
-  }
-
-  var escaping = false
-
-  // examples and comments refer to this crazy pattern:
-  // a{b,c{d,e},{f,g}h}x{y,z}
-  // expected:
-  // abxy
-  // abxz
-  // acdxy
-  // acdxz
-  // acexy
-  // acexz
-  // afhxy
-  // afhxz
-  // aghxy
-  // aghxz
-
-  // everything before the first \{ is just a prefix.
-  // So, we pluck that off, and work with the rest,
-  // and then prepend it to everything we find.
-  if (pattern.charAt(0) !== "{") {
-    this.debug(pattern)
-    var prefix = null
-    for (var i = 0, l = pattern.length; i < l; i ++) {
-      var c = pattern.charAt(i)
-      this.debug(i, c)
-      if (c === "\\") {
-        escaping = !escaping
-      } else if (c === "{" && !escaping) {
-        prefix = pattern.substr(0, i)
-        break
-      }
-    }
-
-    // actually no sets, all { were escaped.
-    if (prefix === null) {
-      this.debug("no sets")
-      return [pattern]
-    }
-
-   var tail = braceExpand.call(this, pattern.substr(i), options)
-    return tail.map(function (t) {
-      return prefix + t
-    })
-  }
-
-  // now we have something like:
-  // {b,c{d,e},{f,g}h}x{y,z}
-  // walk through the set, expanding each part, until
-  // the set ends.  then, we'll expand the suffix.
-  // If the set only has a single member, then'll put the {} back
-
-  // first, handle numeric sets, since they're easier
-  var numset = pattern.match(/^\{(-?[0-9]+)\.\.(-?[0-9]+)\}/)
-  if (numset) {
-    this.debug("numset", numset[1], numset[2])
-    var suf = braceExpand.call(this, pattern.substr(numset[0].length), options)
-      , start = +numset[1]
-      , needPadding = numset[1][0] === '0'
-      , startWidth = numset[1].length
-      , padded
-      , end = +numset[2]
-      , inc = start > end ? -1 : 1
-      , set = []
-
-    for (var i = start; i != (end + inc); i += inc) {
-      padded = needPadding ? pad(i, startWidth) : i + ''
-      // append all the suffixes
-      for (var ii = 0, ll = suf.length; ii < ll; ii ++) {
-        set.push(padded + suf[ii])
-      }
-    }
-    return set
-  }
-
-  // ok, walk through the set
-  // We hope, somewhat optimistically, that there
-  // will be a } at the end.
-  // If the closing brace isn't found, then the pattern is
-  // interpreted as braceExpand("\\" + pattern) so that
-  // the leading \{ will be interpreted literally.
-  var i = 1 // skip the \{
-    , depth = 1
-    , set = []
-    , member = ""
-    , sawEnd = false
-    , escaping = false
-
-  function addMember () {
-    set.push(member)
-    member = ""
-  }
-
-  this.debug("Entering for")
-  FOR: for (i = 1, l = pattern.length; i < l; i ++) {
-    var c = pattern.charAt(i)
-    this.debug("", i, c)
-
-    if (escaping) {
-      escaping = false
-      member += "\\" + c
-    } else {
-      switch (c) {
-        case "\\":
-          escaping = true
-          continue
-
-        case "{":
-          depth ++
-          member += "{"
-          continue
-
-        case "}":
-          depth --
-          // if this closes the actual set, then we're done
-          if (depth === 0) {
-            addMember()
-            // pluck off the close-brace
-            i ++
-            break FOR
-          } else {
-            member += c
-            continue
-          }
-
-        case ",":
-          if (depth === 1) {
-            addMember()
-          } else {
-            member += c
-          }
-          continue
-
-        default:
-          member += c
-          continue
-      } // switch
-    } // else
-  } // for
-
-  // now we've either finished the set, and the suffix is
-  // pattern.substr(i), or we have *not* closed the set,
-  // and need to escape the leading brace
-  if (depth !== 0) {
-    this.debug("didn't close", pattern)
-    return braceExpand.call(this, "\\" + pattern, options)
-  }
-
-  // x{y,z} -> ["xy", "xz"]
-  this.debug("set", set)
-  this.debug("suffix", pattern.substr(i))
-  var suf = braceExpand.call(this, pattern.substr(i), options)
-  // ["b", "c{d,e}","{f,g}h"] ->
-  //   [["b"], ["cd", "ce"], ["fh", "gh"]]
-  var addBraces = set.length === 1
-  this.debug("set pre-expanded", set)
-  set = set.map(function (p) {
-    return braceExpand.call(this, p, options)
-  }, this)
-  this.debug("set expanded", set)
-
-
-  // [["b"], ["cd", "ce"], ["fh", "gh"]] ->
-  //   ["b", "cd", "ce", "fh", "gh"]
-  set = set.reduce(function (l, r) {
-    return l.concat(r)
-  })
-
-  if (addBraces) {
-    set = set.map(function (s) {
-      return "{" + s + "}"
-    })
-  }
-
-  // now attach the suffixes.
-  var ret = []
-  for (var i = 0, l = set.length; i < l; i ++) {
-    for (var ii = 0, ll = suf.length; ii < ll; ii ++) {
-      ret.push(set[i] + suf[ii])
-    }
-  }
-  return ret
-}
-
-// parse a component of the expanded set.
-// At this point, no pattern may contain "/" in it
-// so we're going to return a 2d array, where each entry is the full
-// pattern, split on '/', and then turned into a regular expression.
-// A regexp is made at the end which joins each array with an
-// escaped /, and another full one which joins each regexp with |.
-//
-// Following the lead of Bash 4.1, note that "**" only has special meaning
-// when it is the *only* thing in a path portion.  Otherwise, any series
-// of * is equivalent to a single *.  Globstar behavior is enabled by
-// default, and can be disabled by setting options.noglobstar.
-Minimatch.prototype.parse = parse
-var SUBPARSE = {}
-function parse (pattern, isSub) {
-  var options = this.options
-
-  // shortcuts
-  if (!options.noglobstar && pattern === "**") return GLOBSTAR
-  if (pattern === "") return ""
-
-  var re = ""
-    , hasMagic = !!options.nocase
-    , escaping = false
-    // ? => one single character
-    , patternListStack = []
-    , plType
-    , stateChar
-    , inClass = false
-    , reClassStart = -1
-    , classStart = -1
-    // . and .. never match anything that doesn't start with .,
-    // even when options.dot is set.
-    , patternStart = pattern.charAt(0) === "." ? "" // anything
-      // not (start or / followed by . or .. followed by / or end)
-      : options.dot ? "(?!(?:^|\\\/)\\.{1,2}(?:$|\\\/))"
-      : "(?!\\.)"
-    , self = this
-
-  function clearStateChar () {
-    if (stateChar) {
-      // we had some state-tracking character
-      // that wasn't consumed by this pass.
-      switch (stateChar) {
-        case "*":
-          re += star
-          hasMagic = true
-          break
-        case "?":
-          re += qmark
-          hasMagic = true
-          break
-        default:
-          re += "\\"+stateChar
-          break
-      }
-      self.debug('clearStateChar %j %j', stateChar, re)
-      stateChar = false
-    }
-  }
-
-  for ( var i = 0, len = pattern.length, c
-      ; (i < len) && (c = pattern.charAt(i))
-      ; i ++ ) {
-
-    this.debug("%s\t%s %s %j", pattern, i, re, c)
-
-    // skip over any that are escaped.
-    if (escaping && reSpecials[c]) {
-      re += "\\" + c
-      escaping = false
-      continue
-    }
-
-    SWITCH: switch (c) {
-      case "/":
-        // completely not allowed, even escaped.
-        // Should already be path-split by now.
-        return false
-
-      case "\\":
-        clearStateChar()
-        escaping = true
-        continue
-
-      // the various stateChar values
-      // for the "extglob" stuff.
-      case "?":
-      case "*":
-      case "+":
-      case "@":
-      case "!":
-        this.debug("%s\t%s %s %j <-- stateChar", pattern, i, re, c)
-
-        // all of those are literals inside a class, except that
-        // the glob [!a] means [^a] in regexp
-        if (inClass) {
-          this.debug('  in class')
-          if (c === "!" && i === classStart + 1) c = "^"
-          re += c
-          continue
-        }
-
-        // if we already have a stateChar, then it means
-        // that there was something like ** or +? in there.
-        // Handle the stateChar, then proceed with this one.
-        self.debug('call clearStateChar %j', stateChar)
-        clearStateChar()
-        stateChar = c
-        // if extglob is disabled, then +(asdf|foo) isn't a thing.
-        // just clear the statechar *now*, rather than even diving into
-        // the patternList stuff.
-        if (options.noext) clearStateChar()
-        continue
-
-      case "(":
-        if (inClass) {
-          re += "("
-          continue
-        }
-
-        if (!stateChar) {
-          re += "\\("
-          continue
-        }
-
-        plType = stateChar
-        patternListStack.push({ type: plType
-                              , start: i - 1
-                              , reStart: re.length })
-        // negation is (?:(?!js)[^/]*)
-        re += stateChar === "!" ? "(?:(?!" : "(?:"
-        this.debug('plType %j %j', stateChar, re)
-        stateChar = false
-        continue
-
-      case ")":
-        if (inClass || !patternListStack.length) {
-          re += "\\)"
-          continue
-        }
-
-        clearStateChar()
-        hasMagic = true
-        re += ")"
-        plType = patternListStack.pop().type
-        // negation is (?:(?!js)[^/]*)
-        // The others are (?:<pattern>)<type>
-        switch (plType) {
-          case "!":
-            re += "[^/]*?)"
-            break
-          case "?":
-          case "+":
-          case "*": re += plType
-          case "@": break // the default anyway
-        }
-        continue
-
-      case "|":
-        if (inClass || !patternListStack.length || escaping) {
-          re += "\\|"
-          escaping = false
-          continue
-        }
-
-        clearStateChar()
-        re += "|"
-        continue
-
-      // these are mostly the same in regexp and glob
-      case "[":
-        // swallow any state-tracking char before the [
-        clearStateChar()
-
-        if (inClass) {
-          re += "\\" + c
-          continue
-        }
-
-        inClass = true
-        classStart = i
-        reClassStart = re.length
-        re += c
-        continue
-
-      case "]":
-        //  a right bracket shall lose its special
-        //  meaning and represent itself in
-        //  a bracket expression if it occurs
-        //  first in the list.  -- POSIX.2 2.8.3.2
-        if (i === classStart + 1 || !inClass) {
-          re += "\\" + c
-          escaping = false
-          continue
-        }
-
-        // finish up the class.
-        hasMagic = true
-        inClass = false
-        re += c
-        continue
-
-      default:
-        // swallow any state char that wasn't consumed
-        clearStateChar()
-
-        if (escaping) {
-          // no need
-          escaping = false
-        } else if (reSpecials[c]
-                   && !(c === "^" && inClass)) {
-          re += "\\"
-        }
-
-        re += c
-
-    } // switch
-  } // for
-
-
-  // handle the case where we left a class open.
-  // "[abc" is valid, equivalent to "\[abc"
-  if (inClass) {
-    // split where the last [ was, and escape it
-    // this is a huge pita.  We now have to re-walk
-    // the contents of the would-be class to re-translate
-    // any characters that were passed through as-is
-    var cs = pattern.substr(classStart + 1)
-      , sp = this.parse(cs, SUBPARSE)
-    re = re.substr(0, reClassStart) + "\\[" + sp[0]
-    hasMagic = hasMagic || sp[1]
-  }
-
-  // handle the case where we had a +( thing at the *end*
-  // of the pattern.
-  // each pattern list stack adds 3 chars, and we need to go through
-  // and escape any | chars that were passed through as-is for the regexp.
-  // Go through and escape them, taking care not to double-escape any
-  // | chars that were already escaped.
-  var pl
-  while (pl = patternListStack.pop()) {
-    var tail = re.slice(pl.reStart + 3)
-    // maybe some even number of \, then maybe 1 \, followed by a |
-    tail = tail.replace(/((?:\\{2})*)(\\?)\|/g, function (_, $1, $2) {
-      if (!$2) {
-        // the | isn't already escaped, so escape it.
-        $2 = "\\"
-      }
-
-      // need to escape all those slashes *again*, without escaping the
-      // one that we need for escaping the | character.  As it works out,
-      // escaping an even number of slashes can be done by simply repeating
-      // it exactly after itself.  That's why this trick works.
-      //
-      // I am sorry that you have to see this.
-      return $1 + $1 + $2 + "|"
-    })
-
-    this.debug("tail=%j\n   %s", tail, tail)
-    var t = pl.type === "*" ? star
-          : pl.type === "?" ? qmark
-          : "\\" + pl.type
-
-    hasMagic = true
-    re = re.slice(0, pl.reStart)
-       + t + "\\("
-       + tail
-  }
-
-  // handle trailing things that only matter at the very end.
-  clearStateChar()
-  if (escaping) {
-    // trailing \\
-    re += "\\\\"
-  }
-
-  // only need to apply the nodot start if the re starts with
-  // something that could conceivably capture a dot
-  var addPatternStart = false
-  switch (re.charAt(0)) {
-    case ".":
-    case "[":
-    case "(": addPatternStart = true
-  }
-
-  // if the re is not "" at this point, then we need to make sure
-  // it doesn't match against an empty path part.
-  // Otherwise a/* will match a/, which it should not.
-  if (re !== "" && hasMagic) re = "(?=.)" + re
-
-  if (addPatternStart) re = patternStart + re
-
-  // parsing just a piece of a larger pattern.
-  if (isSub === SUBPARSE) {
-    return [ re, hasMagic ]
-  }
-
-  // skip the regexp for non-magical patterns
-  // unescape anything in it, though, so that it'll be
-  // an exact match against a file etc.
-  if (!hasMagic) {
-    return globUnescape(pattern)
-  }
-
-  var flags = options.nocase ? "i" : ""
-    , regExp = new RegExp("^" + re + "$", flags)
-
-  regExp._glob = pattern
-  regExp._src = re
-
-  return regExp
-}
-
-minimatch.makeRe = function (pattern, options) {
-  return new Minimatch(pattern, options || {}).makeRe()
-}
-
-Minimatch.prototype.makeRe = makeRe
-function makeRe () {
-  if (this.regexp || this.regexp === false) return this.regexp
-
-  // at this point, this.set is a 2d array of partial
-  // pattern strings, or "**".
-  //
-  // It's better to use .match().  This function shouldn't
-  // be used, really, but it's pretty convenient sometimes,
-  // when you just want to work with a regex.
-  var set = this.set
-
-  if (!set.length) return this.regexp = false
-  var options = this.options
-
-  var twoStar = options.noglobstar ? star
-      : options.dot ? twoStarDot
-      : twoStarNoDot
-    , flags = options.nocase ? "i" : ""
-
-  var re = set.map(function (pattern) {
-    return pattern.map(function (p) {
-      return (p === GLOBSTAR) ? twoStar
-           : (typeof p === "string") ? regExpEscape(p)
-           : p._src
-    }).join("\\\/")
-  }).join("|")
-
-  // must match entire pattern
-  // ending in a * or ** will make it less strict.
-  re = "^(?:" + re + ")$"
-
-  // can match anything, as long as it's not this.
-  if (this.negate) re = "^(?!" + re + ").*$"
-
-  try {
-    return this.regexp = new RegExp(re, flags)
-  } catch (ex) {
-    return this.regexp = false
-  }
-}
-
-minimatch.match = function (list, pattern, options) {
-  options = options || {}
-  var mm = new Minimatch(pattern, options)
-  list = list.filter(function (f) {
-    return mm.match(f)
-  })
-  if (mm.options.nonull && !list.length) {
-    list.push(pattern)
-  }
-  return list
-}
-
-Minimatch.prototype.match = match
-function match (f, partial) {
-  this.debug("match", f, this.pattern)
-  // short-circuit in the case of busted things.
-  // comments, etc.
-  if (this.comment) return false
-  if (this.empty) return f === ""
-
-  if (f === "/" && partial) return true
-
-  var options = this.options
-
-  // windows: need to use /, not \
-  // On other platforms, \ is a valid (albeit bad) filename char.
-  if (platform === "win32") {
-    f = f.split("\\").join("/")
-  }
-
-  // treat the test path as a set of pathparts.
-  f = f.split(slashSplit)
-  this.debug(this.pattern, "split", f)
-
-  // just ONE of the pattern sets in this.set needs to match
-  // in order for it to be valid.  If negating, then just one
-  // match means that we have failed.
-  // Either way, return on the first hit.
-
-  var set = this.set
-  this.debug(this.pattern, "set", set)
-
-  // Find the basename of the path by looking for the last non-empty segment
-  var filename;
-  for (var i = f.length - 1; i >= 0; i--) {
-    filename = f[i]
-    if (filename) break
-  }
-
-  for (var i = 0, l = set.length; i < l; i ++) {
-    var pattern = set[i], file = f
-    if (options.matchBase && pattern.length === 1) {
-      file = [filename]
-    }
-    var hit = this.matchOne(file, pattern, partial)
-    if (hit) {
-      if (options.flipNegate) return true
-      return !this.negate
-    }
-  }
-
-  // didn't get any hits.  this is success if it's a negative
-  // pattern, failure otherwise.
-  if (options.flipNegate) return false
-  return this.negate
-}
-
-// set partial to true to test if, for example,
-// "/a/b" matches the start of "/*/b/*/d"
-// Partial means, if you run out of file before you run
-// out of pattern, then that's fine, as long as all
-// the parts match.
-Minimatch.prototype.matchOne = function (file, pattern, partial) {
-  var options = this.options
-
-  this.debug("matchOne",
-              { "this": this
-              , file: file
-              , pattern: pattern })
-
-  this.debug("matchOne", file.length, pattern.length)
-
-  for ( var fi = 0
-          , pi = 0
-          , fl = file.length
-          , pl = pattern.length
-      ; (fi < fl) && (pi < pl)
-      ; fi ++, pi ++ ) {
-
-    this.debug("matchOne loop")
-    var p = pattern[pi]
-      , f = file[fi]
-
-    this.debug(pattern, p, f)
-
-    // should be impossible.
-    // some invalid regexp stuff in the set.
-    if (p === false) return false
-
-    if (p === GLOBSTAR) {
-      this.debug('GLOBSTAR', [pattern, p, f])
-
-      // "**"
-      // a/**/b/**/c would match the following:
-      // a/b/x/y/z/c
-      // a/x/y/z/b/c
-      // a/b/x/b/x/c
-      // a/b/c
-      // To do this, take the rest of the pattern after
-      // the **, and see if it would match the file remainder.
-      // If so, return success.
-      // If not, the ** "swallows" a segment, and try again.
-      // This is recursively awful.
-      //
-      // a/**/b/**/c matching a/b/x/y/z/c
-      // - a matches a
-      // - doublestar
-      //   - matchOne(b/x/y/z/c, b/**/c)
-      //     - b matches b
-      //     - doublestar
-      //       - matchOne(x/y/z/c, c) -> no
-      //       - matchOne(y/z/c, c) -> no
-      //       - matchOne(z/c, c) -> no
-      //       - matchOne(c, c) yes, hit
-      var fr = fi
-        , pr = pi + 1
-      if (pr === pl) {
-        this.debug('** at the end')
-        // a ** at the end will just swallow the rest.
-        // We have found a match.
-        // however, it will not swallow /.x, unless
-        // options.dot is set.
-        // . and .. are *never* matched by **, for explosively
-        // exponential reasons.
-        for ( ; fi < fl; fi ++) {
-          if (file[fi] === "." || file[fi] === ".." ||
-              (!options.dot && file[fi].charAt(0) === ".")) return false
-        }
-        return true
-      }
-
-      // ok, let's see if we can swallow whatever we can.
-      WHILE: while (fr < fl) {
-        var swallowee = file[fr]
-
-        this.debug('\nglobstar while',
-                    file, fr, pattern, pr, swallowee)
-
-        // XXX remove this slice.  Just pass the start index.
-        if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {
-          this.debug('globstar found match!', fr, fl, swallowee)
-          // found a match.
-          return true
-        } else {
-          // can't swallow "." or ".." ever.
-          // can only swallow ".foo" when explicitly asked.
-          if (swallowee === "." || swallowee === ".." ||
-              (!options.dot && swallowee.charAt(0) === ".")) {
-            this.debug("dot detected!", file, fr, pattern, pr)
-            break WHILE
-          }
-
-          // ** swallows a segment, and continue.
-          this.debug('globstar swallow a segment, and continue')
-          fr ++
-        }
-      }
-      // no match was found.
-      // However, in partial mode, we can't say this is necessarily over.
-      // If there's more *pattern* left, then
-      if (partial) {
-        // ran out of file
-        this.debug("\n>>> no match, partial?", file, fr, pattern, pr)
-        if (fr === fl) return true
-      }
-      return false
-    }
-
-    // something other than **
-    // non-magic patterns just have to match exactly
-    // patterns with magic have been turned into regexps.
-    var hit
-    if (typeof p === "string") {
-      if (options.nocase) {
-        hit = f.toLowerCase() === p.toLowerCase()
-      } else {
-        hit = f === p
-      }
-      this.debug("string match", p, f, hit)
-    } else {
-      hit = f.match(p)
-      this.debug("pattern match", p, f, hit)
-    }
-
-    if (!hit) return false
-  }
-
-  // Note: ending in / means that we'll get a final ""
-  // at the end of the pattern.  This can only match a
-  // corresponding "" at the end of the file.
-  // If the file ends in /, then it can only match a
-  // a pattern that ends in /, unless the pattern just
-  // doesn't have any more for it. But, a/b/ should *not*
-  // match "a/b/*", even though "" matches against the
-  // [^/]*? pattern, except in partial mode, where it might
-  // simply not be reached yet.
-  // However, a/b/ should still satisfy a/*
-
-  // now either we fell off the end of the pattern, or we're done.
-  if (fi === fl && pi === pl) {
-    // ran out of pattern and filename at the same time.
-    // an exact hit!
-    return true
-  } else if (fi === fl) {
-    // ran out of file, but still had pattern left.
-    // this is ok if we're doing the match as part of
-    // a glob fs traversal.
-    return partial
-  } else if (pi === pl) {
-    // ran out of pattern, still have file left.
-    // this is only acceptable if we're on the very last
-    // empty segment of a file with a trailing slash.
-    // a/* should match a/b/
-    var emptyFileEnd = (fi === fl - 1) && (file[fi] === "")
-    return emptyFileEnd
-  }
-
-  // should be unreachable.
-  throw new Error("wtf?")
-}
-
-
-// replace stuff like \* with *
-function globUnescape (s) {
-  return s.replace(/\\(.)/g, "$1")
-}
-
-
-function regExpEscape (s) {
-  return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&")
-}
-
-})( typeof require === "function" ? require : null,
-    this,
-    typeof module === "object" ? module : null,
-    typeof process === "object" ? process.platform : "win32"
-  )
-
-},{"lru-cache":40,"path":42,"sigmund":47}],42:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-// resolves . and .. elements in a path array with directory names there
-// must be no slashes, empty elements, or device names (c:\) in the array
-// (so also no leading and trailing slashes - it does not distinguish
-// relative and absolute paths)
-function normalizeArray(parts, allowAboveRoot) {
-  // if the path tries to go above the root, `up` ends up > 0
-  var up = 0;
-  for (var i = parts.length - 1; i >= 0; i--) {
-    var last = parts[i];
-    if (last === '.') {
-      parts.splice(i, 1);
-    } else if (last === '..') {
-      parts.splice(i, 1);
-      up++;
-    } else if (up) {
-      parts.splice(i, 1);
-      up--;
-    }
-  }
-
-  // if the path is allowed to go above the root, restore leading ..s
-  if (allowAboveRoot) {
-    for (; up--; up) {
-      parts.unshift('..');
-    }
-  }
-
-  return parts;
-}
-
-// Split a filename into [root, dir, basename, ext], unix version
-// 'root' is just a slash, or nothing.
-var splitPathRe =
-    /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
-var splitPath = function(filename) {
-  return splitPathRe.exec(filename).slice(1);
-};
-
-// path.resolve([from ...], to)
-// posix version
-exports.resolve = function() {
-  var resolvedPath = '',
-      resolvedAbsolute = false;
-
-  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
-    var path = (i >= 0) ? arguments[i] : process.cwd();
-
-    // Skip empty and invalid entries
-    if (typeof path !== 'string') {
-      throw new TypeError('Arguments to path.resolve must be strings');
-    } else if (!path) {
-      continue;
-    }
-
-    resolvedPath = path + '/' + resolvedPath;
-    resolvedAbsolute = path.charAt(0) === '/';
-  }
-
-  // At this point the path should be resolved to a full absolute path, but
-  // handle relative paths to be safe (might happen when process.cwd() fails)
-
-  // Normalize the path
-  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
-    return !!p;
-  }), !resolvedAbsolute).join('/');
-
-  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
-};
-
-// path.normalize(path)
-// posix version
-exports.normalize = function(path) {
-  var isAbsolute = exports.isAbsolute(path),
-      trailingSlash = substr(path, -1) === '/';
-
-  // Normalize the path
-  path = normalizeArray(filter(path.split('/'), function(p) {
-    return !!p;
-  }), !isAbsolute).join('/');
-
-  if (!path && !isAbsolute) {
-    path = '.';
-  }
-  if (path && trailingSlash) {
-    path += '/';
-  }
-
-  return (isAbsolute ? '/' : '') + path;
-};
-
-// posix version
-exports.isAbsolute = function(path) {
-  return path.charAt(0) === '/';
-};
-
-// posix version
-exports.join = function() {
-  var paths = Array.prototype.slice.call(arguments, 0);
-  return exports.normalize(filter(paths, function(p, index) {
-    if (typeof p !== 'string') {
-      throw new TypeError('Arguments to path.join must be strings');
-    }
-    return p;
-  }).join('/'));
-};
-
-
-// path.relative(from, to)
-// posix version
-exports.relative = function(from, to) {
-  from = exports.resolve(from).substr(1);
-  to = exports.resolve(to).substr(1);
-
-  function trim(arr) {
-    var start = 0;
-    for (; start < arr.length; start++) {
-      if (arr[start] !== '') break;
-    }
-
-    var end = arr.length - 1;
-    for (; end >= 0; end--) {
-      if (arr[end] !== '') break;
-    }
-
-    if (start > end) return [];
-    return arr.slice(start, end - start + 1);
-  }
-
-  var fromParts = trim(from.split('/'));
-  var toParts = trim(to.split('/'));
-
-  var length = Math.min(fromParts.length, toParts.length);
-  var samePartsLength = length;
-  for (var i = 0; i < length; i++) {
-    if (fromParts[i] !== toParts[i]) {
-      samePartsLength = i;
-      break;
-    }
-  }
-
-  var outputParts = [];
-  for (var i = samePartsLength; i < fromParts.length; i++) {
-    outputParts.push('..');
-  }
-
-  outputParts = outputParts.concat(toParts.slice(samePartsLength));
-
-  return outputParts.join('/');
-};
-
-exports.sep = '/';
-exports.delimiter = ':';
-
-exports.dirname = function(path) {
-  var result = splitPath(path),
-      root = result[0],
-      dir = result[1];
-
-  if (!root && !dir) {
-    // No dirname whatsoever
-    return '.';
-  }
-
-  if (dir) {
-    // It has a dirname, strip trailing slash
-    dir = dir.substr(0, dir.length - 1);
-  }
-
-  return root + dir;
-};
-
-
-exports.basename = function(path, ext) {
-  var f = splitPath(path)[2];
-  // TODO: make this comparison case-insensitive on windows?
-  if (ext && f.substr(-1 * ext.length) === ext) {
-    f = f.substr(0, f.length - ext.length);
-  }
-  return f;
-};
-
-
-exports.extname = function(path) {
-  return splitPath(path)[3];
-};
-
-function filter (xs, f) {
-    if (xs.filter) return xs.filter(f);
-    var res = [];
-    for (var i = 0; i < xs.length; i++) {
-        if (f(xs[i], i, xs)) res.push(xs[i]);
-    }
-    return res;
-}
-
-// String.prototype.substr - negative index don't work in IE8
-var substr = 'ab'.substr(-1) === 'b'
-    ? function (str, start, len) { return str.substr(start, len) }
-    : function (str, start, len) {
-        if (start < 0) start = str.length + start;
-        return str.substr(start, len);
-    }
-;
-
-},{}],43:[function(require,module,exports){
-(function (global){
-/*! https://mths.be/punycode v1.4.1 by @mathias */
-;(function(root) {
-
-	/** Detect free variables */
-	var freeExports = typeof exports == 'object' && exports &&
-		!exports.nodeType && exports;
-	var freeModule = typeof module == 'object' && module &&
-		!module.nodeType && module;
-	var freeGlobal = typeof global == 'object' && global;
-	if (
-		freeGlobal.global === freeGlobal ||
-		freeGlobal.window === freeGlobal ||
-		freeGlobal.self === freeGlobal
-	) {
-		root = freeGlobal;
-	}
-
-	/**
-	 * The `punycode` object.
-	 * @name punycode
-	 * @type Object
-	 */
-	var punycode,
-
-	/** Highest positive signed 32-bit float value */
-	maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1
-
-	/** Bootstring parameters */
-	base = 36,
-	tMin = 1,
-	tMax = 26,
-	skew = 38,
-	damp = 700,
-	initialBias = 72,
-	initialN = 128, // 0x80
-	delimiter = '-', // '\x2D'
-
-	/** Regular expressions */
-	regexPunycode = /^xn--/,
-	regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
-	regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators
-
-	/** Error messages */
-	errors = {
-		'overflow': 'Overflow: input needs wider integers to process',
-		'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
-		'invalid-input': 'Invalid input'
-	},
-
-	/** Convenience shortcuts */
-	baseMinusTMin = base - tMin,
-	floor = Math.floor,
-	stringFromCharCode = String.fromCharCode,
-
-	/** Temporary variable */
-	key;
-
-	/*--------------------------------------------------------------------------*/
-
-	/**
-	 * A generic error utility function.
-	 * @private
-	 * @param {String} type The error type.
-	 * @returns {Error} Throws a `RangeError` with the applicable error message.
-	 */
-	function error(type) {
-		throw new RangeError(errors[type]);
-	}
-
-	/**
-	 * A generic `Array#map` utility function.
-	 * @private
-	 * @param {Array} array The array to iterate over.
-	 * @param {Function} callback The function that gets called for every array
-	 * item.
-	 * @returns {Array} A new array of values returned by the callback function.
-	 */
-	function map(array, fn) {
-		var length = array.length;
-		var result = [];
-		while (length--) {
-			result[length] = fn(array[length]);
-		}
-		return result;
-	}
-
-	/**
-	 * A simple `Array#map`-like wrapper to work with domain name strings or email
-	 * addresses.
-	 * @private
-	 * @param {String} domain The domain name or email address.
-	 * @param {Function} callback The function that gets called for every
-	 * character.
-	 * @returns {Array} A new string of characters returned by the callback
-	 * function.
-	 */
-	function mapDomain(string, fn) {
-		var parts = string.split('@');
-		var result = '';
-		if (parts.length > 1) {
-			// In email addresses, only the domain name should be punycoded. Leave
-			// the local part (i.e. everything up to `@`) intact.
-			result = parts[0] + '@';
-			string = parts[1];
-		}
-		// Avoid `split(regex)` for IE8 compatibility. See #17.
-		string = string.replace(regexSeparators, '\x2E');
-		var labels = string.split('.');
-		var encoded = map(labels, fn).join('.');
-		return result + encoded;
-	}
-
-	/**
-	 * Creates an array containing the numeric code points of each Unicode
-	 * character in the string. While JavaScript uses UCS-2 internally,
-	 * this function will convert a pair of surrogate halves (each of which
-	 * UCS-2 exposes as separate characters) into a single code point,
-	 * matching UTF-16.
-	 * @see `punycode.ucs2.encode`
-	 * @see <https://mathiasbynens.be/notes/javascript-encoding>
-	 * @memberOf punycode.ucs2
-	 * @name decode
-	 * @param {String} string The Unicode input string (UCS-2).
-	 * @returns {Array} The new array of code points.
-	 */
-	function ucs2decode(string) {
-		var output = [],
-		    counter = 0,
-		    length = string.length,
-		    value,
-		    extra;
-		while (counter < length) {
-			value = string.charCodeAt(counter++);
-			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
-				// high surrogate, and there is a next character
-				extra = string.charCodeAt(counter++);
-				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
-					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
-				} else {
-					// unmatched surrogate; only append this code unit, in case the next
-					// code unit is the high surrogate of a surrogate pair
-					output.push(value);
-					counter--;
-				}
-			} else {
-				output.push(value);
-			}
-		}
-		return output;
-	}
-
-	/**
-	 * Creates a string based on an array of numeric code points.
-	 * @see `punycode.ucs2.decode`
-	 * @memberOf punycode.ucs2
-	 * @name encode
-	 * @param {Array} codePoints The array of numeric code points.
-	 * @returns {String} The new Unicode string (UCS-2).
-	 */
-	function ucs2encode(array) {
-		return map(array, function(value) {
-			var output = '';
-			if (value > 0xFFFF) {
-				value -= 0x10000;
-				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
-				value = 0xDC00 | value & 0x3FF;
-			}
-			output += stringFromCharCode(value);
-			return output;
-		}).join('');
-	}
-
-	/**
-	 * Converts a basic code point into a digit/integer.
-	 * @see `digitToBasic()`
-	 * @private
-	 * @param {Number} codePoint The basic numeric code point value.
-	 * @returns {Number} The numeric value of a basic code point (for use in
-	 * representing integers) in the range `0` to `base - 1`, or `base` if
-	 * the code point does not represent a value.
-	 */
-	function basicToDigit(codePoint) {
-		if (codePoint - 48 < 10) {
-			return codePoint - 22;
-		}
-		if (codePoint - 65 < 26) {
-			return codePoint - 65;
-		}
-		if (codePoint - 97 < 26) {
-			return codePoint - 97;
-		}
-		return base;
-	}
-
-	/**
-	 * Converts a digit/integer into a basic code point.
-	 * @see `basicToDigit()`
-	 * @private
-	 * @param {Number} digit The numeric value of a basic code point.
-	 * @returns {Number} The basic code point whose value (when used for
-	 * representing integers) is `digit`, which needs to be in the range
-	 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
-	 * used; else, the lowercase form is used. The behavior is undefined
-	 * if `flag` is non-zero and `digit` has no uppercase form.
-	 */
-	function digitToBasic(digit, flag) {
-		//  0..25 map to ASCII a..z or A..Z
-		// 26..35 map to ASCII 0..9
-		return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
-	}
-
-	/**
-	 * Bias adaptation function as per section 3.4 of RFC 3492.
-	 * https://tools.ietf.org/html/rfc3492#section-3.4
-	 * @private
-	 */
-	function adapt(delta, numPoints, firstTime) {
-		var k = 0;
-		delta = firstTime ? floor(delta / damp) : delta >> 1;
-		delta += floor(delta / numPoints);
-		for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
-			delta = floor(delta / baseMinusTMin);
-		}
-		return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
-	}
-
-	/**
-	 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
-	 * symbols.
-	 * @memberOf punycode
-	 * @param {String} input The Punycode string of ASCII-only symbols.
-	 * @returns {String} The resulting string of Unicode symbols.
-	 */
-	function decode(input) {
-		// Don't use UCS-2
-		var output = [],
-		    inputLength = input.length,
-		    out,
-		    i = 0,
-		    n = initialN,
-		    bias = initialBias,
-		    basic,
-		    j,
-		    index,
-		    oldi,
-		    w,
-		    k,
-		    digit,
-		    t,
-		    /** Cached calculation results */
-		    baseMinusT;
-
-		// Handle the basic code points: let `basic` be the number of input code
-		// points before the last delimiter, or `0` if there is none, then copy
-		// the first basic code points to the output.
-
-		basic = input.lastIndexOf(delimiter);
-		if (basic < 0) {
-			basic = 0;
-		}
-
-		for (j = 0; j < basic; ++j) {
-			// if it's not a basic code point
-			if (input.charCodeAt(j) >= 0x80) {
-				error('not-basic');
-			}
-			output.push(input.charCodeAt(j));
-		}
-
-		// Main decoding loop: start just after the last delimiter if any basic code
-		// points were copied; start at the beginning otherwise.
-
-		for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {
-
-			// `index` is the index of the next character to be consumed.
-			// Decode a generalized variable-length integer into `delta`,
-			// which gets added to `i`. The overflow checking is easier
-			// if we increase `i` as we go, then subtract off its starting
-			// value at the end to obtain `delta`.
-			for (oldi = i, w = 1, k = base; /* no condition */; k += base) {
-
-				if (index >= inputLength) {
-					error('invalid-input');
-				}
-
-				digit = basicToDigit(input.charCodeAt(index++));
-
-				if (digit >= base || digit > floor((maxInt - i) / w)) {
-					error('overflow');
-				}
-
-				i += digit * w;
-				t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
-
-				if (digit < t) {
-					break;
-				}
-
-				baseMinusT = base - t;
-				if (w > floor(maxInt / baseMinusT)) {
-					error('overflow');
-				}
-
-				w *= baseMinusT;
-
-			}
-
-			out = output.length + 1;
-			bias = adapt(i - oldi, out, oldi == 0);
-
-			// `i` was supposed to wrap around from `out` to `0`,
-			// incrementing `n` each time, so we'll fix that now:
-			if (floor(i / out) > maxInt - n) {
-				error('overflow');
-			}
-
-			n += floor(i / out);
-			i %= out;
-
-			// Insert `n` at position `i` of the output
-			output.splice(i++, 0, n);
-
-		}
-
-		return ucs2encode(output);
-	}
-
-	/**
-	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
-	 * Punycode string of ASCII-only symbols.
-	 * @memberOf punycode
-	 * @param {String} input The string of Unicode symbols.
-	 * @returns {String} The resulting Punycode string of ASCII-only symbols.
-	 */
-	function encode(input) {
-		var n,
-		    delta,
-		    handledCPCount,
-		    basicLength,
-		    bias,
-		    j,
-		    m,
-		    q,
-		    k,
-		    t,
-		    currentValue,
-		    output = [],
-		    /** `inputLength` will hold the number of code points in `input`. */
-		    inputLength,
-		    /** Cached calculation results */
-		    handledCPCountPlusOne,
-		    baseMinusT,
-		    qMinusT;
-
-		// Convert the input in UCS-2 to Unicode
-		input = ucs2decode(input);
-
-		// Cache the length
-		inputLength = input.length;
-
-		// Initialize the state
-		n = initialN;
-		delta = 0;
-		bias = initialBias;
-
-		// Handle the basic code points
-		for (j = 0; j < inputLength; ++j) {
-			currentValue = input[j];
-			if (currentValue < 0x80) {
-				output.push(stringFromCharCode(currentValue));
-			}
-		}
-
-		handledCPCount = basicLength = output.length;
-
-		// `handledCPCount` is the number of code points that have been handled;
-		// `basicLength` is the number of basic code points.
-
-		// Finish the basic string - if it is not empty - with a delimiter
-		if (basicLength) {
-			output.push(delimiter);
-		}
-
-		// Main encoding loop:
-		while (handledCPCount < inputLength) {
-
-			// All non-basic code points < n have been handled already. Find the next
-			// larger one:
-			for (m = maxInt, j = 0; j < inputLength; ++j) {
-				currentValue = input[j];
-				if (currentValue >= n && currentValue < m) {
-					m = currentValue;
-				}
-			}
-
-			// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
-			// but guard against overflow
-			handledCPCountPlusOne = handledCPCount + 1;
-			if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
-				error('overflow');
-			}
-
-			delta += (m - n) * handledCPCountPlusOne;
-			n = m;
-
-			for (j = 0; j < inputLength; ++j) {
-				currentValue = input[j];
-
-				if (currentValue < n && ++delta > maxInt) {
-					error('overflow');
-				}
-
-				if (currentValue == n) {
-					// Represent delta as a generalized variable-length integer
-					for (q = delta, k = base; /* no condition */; k += base) {
-						t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
-						if (q < t) {
-							break;
-						}
-						qMinusT = q - t;
-						baseMinusT = base - t;
-						output.push(
-							stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
-						);
-						q = floor(qMinusT / baseMinusT);
-					}
-
-					output.push(stringFromCharCode(digitToBasic(q, 0)));
-					bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
-					delta = 0;
-					++handledCPCount;
-				}
-			}
-
-			++delta;
-			++n;
-
-		}
-		return output.join('');
-	}
-
-	/**
-	 * Converts a Punycode string representing a domain name or an email address
-	 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
-	 * it doesn't matter if you call it on a string that has already been
-	 * converted to Unicode.
-	 * @memberOf punycode
-	 * @param {String} input The Punycoded domain name or email address to
-	 * convert to Unicode.
-	 * @returns {String} The Unicode representation of the given Punycode
-	 * string.
-	 */
-	function toUnicode(input) {
-		return mapDomain(input, function(string) {
-			return regexPunycode.test(string)
-				? decode(string.slice(4).toLowerCase())
-				: string;
-		});
-	}
-
-	/**
-	 * Converts a Unicode string representing a domain name or an email address to
-	 * Punycode. Only the non-ASCII parts of the domain name will be converted,
-	 * i.e. it doesn't matter if you call it with a domain that's already in
-	 * ASCII.
-	 * @memberOf punycode
-	 * @param {String} input The domain name or email address to convert, as a
-	 * Unicode string.
-	 * @returns {String} The Punycode representation of the given domain name or
-	 * email address.
-	 */
-	function toASCII(input) {
-		return mapDomain(input, function(string) {
-			return regexNonASCII.test(string)
-				? 'xn--' + encode(string)
-				: string;
-		});
-	}
-
-	/*--------------------------------------------------------------------------*/
-
-	/** Define the public API */
-	punycode = {
-		/**
-		 * A string representing the current Punycode.js version number.
-		 * @memberOf punycode
-		 * @type String
-		 */
-		'version': '1.4.1',
-		/**
-		 * An object of methods to convert from JavaScript's internal character
-		 * representation (UCS-2) to Unicode code points, and back.
-		 * @see <https://mathiasbynens.be/notes/javascript-encoding>
-		 * @memberOf punycode
-		 * @type Object
-		 */
-		'ucs2': {
-			'decode': ucs2decode,
-			'encode': ucs2encode
-		},
-		'decode': decode,
-		'encode': encode,
-		'toASCII': toASCII,
-		'toUnicode': toUnicode
-	};
-
-	/** Expose `punycode` */
-	// Some AMD build optimizers, like r.js, check for specific condition patterns
-	// like the following:
-	if (
-		typeof define == 'function' &&
-		typeof define.amd == 'object' &&
-		define.amd
-	) {
-		define('punycode', function() {
-			return punycode;
-		});
-	} else if (freeExports && freeModule) {
-		if (module.exports == freeExports) {
-			// in Node.js, io.js, or RingoJS v0.8.0+
-			freeModule.exports = punycode;
-		} else {
-			// in Narwhal or RingoJS v0.7.0-
-			for (key in punycode) {
-				punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
-			}
-		}
-	} else {
-		// in Rhino or a web browser
-		root.punycode = punycode;
-	}
-
-}(this));
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{}],44:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-'use strict';
-
-// If obj.hasOwnProperty has been overridden, then calling
-// obj.hasOwnProperty(prop) will break.
-// See: https://github.com/joyent/node/issues/1707
-function hasOwnProperty(obj, prop) {
-  return Object.prototype.hasOwnProperty.call(obj, prop);
-}
-
-module.exports = function(qs, sep, eq, options) {
-  sep = sep || '&';
-  eq = eq || '=';
-  var obj = {};
-
-  if (typeof qs !== 'string' || qs.length === 0) {
-    return obj;
-  }
-
-  var regexp = /\+/g;
-  qs = qs.split(sep);
-
-  var maxKeys = 1000;
-  if (options && typeof options.maxKeys === 'number') {
-    maxKeys = options.maxKeys;
-  }
-
-  var len = qs.length;
-  // maxKeys <= 0 means that we should not limit keys count
-  if (maxKeys > 0 && len > maxKeys) {
-    len = maxKeys;
-  }
-
-  for (var i = 0; i < len; ++i) {
-    var x = qs[i].replace(regexp, '%20'),
-        idx = x.indexOf(eq),
-        kstr, vstr, k, v;
-
-    if (idx >= 0) {
-      kstr = x.substr(0, idx);
-      vstr = x.substr(idx + 1);
-    } else {
-      kstr = x;
-      vstr = '';
-    }
-
-    k = decodeURIComponent(kstr);
-    v = decodeURIComponent(vstr);
-
-    if (!hasOwnProperty(obj, k)) {
-      obj[k] = v;
-    } else if (isArray(obj[k])) {
-      obj[k].push(v);
-    } else {
-      obj[k] = [obj[k], v];
-    }
-  }
-
-  return obj;
-};
-
-var isArray = Array.isArray || function (xs) {
-  return Object.prototype.toString.call(xs) === '[object Array]';
-};
-
-},{}],45:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-'use strict';
-
-var stringifyPrimitive = function(v) {
-  switch (typeof v) {
-    case 'string':
-      return v;
-
-    case 'boolean':
-      return v ? 'true' : 'false';
-
-    case 'number':
-      return isFinite(v) ? v : '';
-
-    default:
-      return '';
-  }
-};
-
-module.exports = function(obj, sep, eq, name) {
-  sep = sep || '&';
-  eq = eq || '=';
-  if (obj === null) {
-    obj = undefined;
-  }
-
-  if (typeof obj === 'object') {
-    return map(objectKeys(obj), function(k) {
-      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;
-      if (isArray(obj[k])) {
-        return map(obj[k], function(v) {
-          return ks + encodeURIComponent(stringifyPrimitive(v));
-        }).join(sep);
-      } else {
-        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));
-      }
-    }).join(sep);
-
-  }
-
-  if (!name) return '';
-  return encodeURIComponent(stringifyPrimitive(name)) + eq +
-         encodeURIComponent(stringifyPrimitive(obj));
-};
-
-var isArray = Array.isArray || function (xs) {
-  return Object.prototype.toString.call(xs) === '[object Array]';
-};
-
-function map (xs, f) {
-  if (xs.map) return xs.map(f);
-  var res = [];
-  for (var i = 0; i < xs.length; i++) {
-    res.push(f(xs[i], i));
-  }
-  return res;
-}
-
-var objectKeys = Object.keys || function (obj) {
-  var res = [];
-  for (var key in obj) {
-    if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);
-  }
-  return res;
-};
-
-},{}],46:[function(require,module,exports){
-'use strict';
-
-exports.decode = exports.parse = require('./decode');
-exports.encode = exports.stringify = require('./encode');
-
-},{"./decode":44,"./encode":45}],47:[function(require,module,exports){
-module.exports = sigmund
-function sigmund (subject, maxSessions) {
-    maxSessions = maxSessions || 10;
-    var notes = [];
-    var analysis = '';
-    var RE = RegExp;
-
-    function psychoAnalyze (subject, session) {
-        if (session > maxSessions) return;
-
-        if (typeof subject === 'function' ||
-            typeof subject === 'undefined') {
-            return;
-        }
-
-        if (typeof subject !== 'object' || !subject ||
-            (subject instanceof RE)) {
-            analysis += subject;
-            return;
-        }
-
-        if (notes.indexOf(subject) !== -1 || session === maxSessions) return;
-
-        notes.push(subject);
-        analysis += '{';
-        Object.keys(subject).forEach(function (issue, _, __) {
-            // pseudo-private values.  skip those.
-            if (issue.charAt(0) === '_') return;
-            var to = typeof subject[issue];
-            if (to === 'function' || to === 'undefined') return;
-            analysis += issue;
-            psychoAnalyze(subject[issue], session + 1);
-        });
-    }
-    psychoAnalyze(subject, 0);
-    return analysis;
-}
-
-// vim: set softtabstop=4 shiftwidth=4:
-
-},{}],48:[function(require,module,exports){
-module.exports = require('./lib/type');
-
-},{"./lib/type":49}],49:[function(require,module,exports){
-/*!
- * type-detect
- * Copyright(c) 2013 jake luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Primary Exports
- */
-
-var exports = module.exports = getType;
-
-/*!
- * Detectable javascript natives
- */
-
-var natives = {
-    '[object Array]': 'array'
-  , '[object RegExp]': 'regexp'
-  , '[object Function]': 'function'
-  , '[object Arguments]': 'arguments'
-  , '[object Date]': 'date'
-};
-
-/**
- * ### typeOf (obj)
- *
- * Use several different techniques to determine
- * the type of object being tested.
- *
- *
- * @param {Mixed} object
- * @return {String} object type
- * @api public
- */
-
-function getType (obj) {
-  var str = Object.prototype.toString.call(obj);
-  if (natives[str]) return natives[str];
-  if (obj === null) return 'null';
-  if (obj === undefined) return 'undefined';
-  if (obj === Object(obj)) return 'object';
-  return typeof obj;
-}
-
-exports.Library = Library;
-
-/**
- * ### Library
- *
- * Create a repository for custom type detection.
- *
- * ```js
- * var lib = new type.Library;
- * ```
- *
- */
-
-function Library () {
-  this.tests = {};
-}
-
-/**
- * #### .of (obj)
- *
- * Expose replacement `typeof` detection to the library.
- *
- * ```js
- * if ('string' === lib.of('hello world')) {
- *   // ...
- * }
- * ```
- *
- * @param {Mixed} object to test
- * @return {String} type
- */
-
-Library.prototype.of = getType;
-
-/**
- * #### .define (type, test)
- *
- * Add a test to for the `.test()` assertion.
- *
- * Can be defined as a regular expression:
- *
- * ```js
- * lib.define('int', /^[0-9]+$/);
- * ```
- *
- * ... or as a function:
- *
- * ```js
- * lib.define('bln', function (obj) {
- *   if ('boolean' === lib.of(obj)) return true;
- *   var blns = [ 'yes', 'no', 'true', 'false', 1, 0 ];
- *   if ('string' === lib.of(obj)) obj = obj.toLowerCase();
- *   return !! ~blns.indexOf(obj);
- * });
- * ```
- *
- * @param {String} type
- * @param {RegExp|Function} test
- * @api public
- */
-
-Library.prototype.define = function (type, test) {
-  if (arguments.length === 1) return this.tests[type];
-  this.tests[type] = test;
-  return this;
-};
-
-/**
- * #### .test (obj, test)
- *
- * Assert that an object is of type. Will first
- * check natives, and if that does not pass it will
- * use the user defined custom tests.
- *
- * ```js
- * assert(lib.test('1', 'int'));
- * assert(lib.test('yes', 'bln'));
- * ```
- *
- * @param {Mixed} object
- * @param {String} type
- * @return {Boolean} result
- * @api public
- */
-
-Library.prototype.test = function (obj, type) {
-  if (type === getType(obj)) return true;
-  var test = this.tests[type];
-
-  if (test && 'regexp' === getType(test)) {
-    return test.test(obj);
-  } else if (test && 'function' === getType(test)) {
-    return test(obj);
-  } else {
-    throw new ReferenceError('Type test "' + type + '" not defined or invalid.');
-  }
-};
-
-},{}],50:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-var punycode = require('punycode');
-
-exports.parse = urlParse;
-exports.resolve = urlResolve;
-exports.resolveObject = urlResolveObject;
-exports.format = urlFormat;
-
-exports.Url = Url;
-
-function Url() {
-  this.protocol = null;
-  this.slashes = null;
-  this.auth = null;
-  this.host = null;
-  this.port = null;
-  this.hostname = null;
-  this.hash = null;
-  this.search = null;
-  this.query = null;
-  this.pathname = null;
-  this.path = null;
-  this.href = null;
-}
-
-// Reference: RFC 3986, RFC 1808, RFC 2396
-
-// define these here so at least they only have to be
-// compiled once on the first module load.
-var protocolPattern = /^([a-z0-9.+-]+:)/i,
-    portPattern = /:[0-9]*$/,
-
-    // RFC 2396: characters reserved for delimiting URLs.
-    // We actually just auto-escape these.
-    delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],
-
-    // RFC 2396: characters not allowed for various reasons.
-    unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims),
-
-    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.
-    autoEscape = ['\''].concat(unwise),
-    // Characters that are never ever allowed in a hostname.
-    // Note that any invalid chars are also handled, but these
-    // are the ones that are *expected* to be seen, so we fast-path
-    // them.
-    nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),
-    hostEndingChars = ['/', '?', '#'],
-    hostnameMaxLen = 255,
-    hostnamePartPattern = /^[a-z0-9A-Z_-]{0,63}$/,
-    hostnamePartStart = /^([a-z0-9A-Z_-]{0,63})(.*)$/,
-    // protocols that can allow "unsafe" and "unwise" chars.
-    unsafeProtocol = {
-      'javascript': true,
-      'javascript:': true
-    },
-    // protocols that never have a hostname.
-    hostlessProtocol = {
-      'javascript': true,
-      'javascript:': true
-    },
-    // protocols that always contain a // bit.
-    slashedProtocol = {
-      'http': true,
-      'https': true,
-      'ftp': true,
-      'gopher': true,
-      'file': true,
-      'http:': true,
-      'https:': true,
-      'ftp:': true,
-      'gopher:': true,
-      'file:': true
-    },
-    querystring = require('querystring');
-
-function urlParse(url, parseQueryString, slashesDenoteHost) {
-  if (url && isObject(url) && url instanceof Url) return url;
-
-  var u = new Url;
-  u.parse(url, parseQueryString, slashesDenoteHost);
-  return u;
-}
-
-Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
-  if (!isString(url)) {
-    throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
-  }
-
-  var rest = url;
-
-  // trim before proceeding.
-  // This is to support parse stuff like "  http://foo.com  \n"
-  rest = rest.trim();
-
-  var proto = protocolPattern.exec(rest);
-  if (proto) {
-    proto = proto[0];
-    var lowerProto = proto.toLowerCase();
-    this.protocol = lowerProto;
-    rest = rest.substr(proto.length);
-  }
-
-  // figure out if it's got a host
-  // user@server is *always* interpreted as a hostname, and url
-  // resolution will treat //foo/bar as host=foo,path=bar because that's
-  // how the browser resolves relative URLs.
-  if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
-    var slashes = rest.substr(0, 2) === '//';
-    if (slashes && !(proto && hostlessProtocol[proto])) {
-      rest = rest.substr(2);
-      this.slashes = true;
-    }
-  }
-
-  if (!hostlessProtocol[proto] &&
-      (slashes || (proto && !slashedProtocol[proto]))) {
-
-    // there's a hostname.
-    // the first instance of /, ?, ;, or # ends the host.
-    //
-    // If there is an @ in the hostname, then non-host chars *are* allowed
-    // to the left of the last @ sign, unless some host-ending character
-    // comes *before* the @-sign.
-    // URLs are obnoxious.
-    //
-    // ex:
-    // http://a@b@c/ => user:a@b host:c
-    // http://a@b?@c => user:a host:c path:/?@c
-
-    // v0.12 TODO(isaacs): This is not quite how Chrome does things.
-    // Review our test case against browsers more comprehensively.
-
-    // find the first instance of any hostEndingChars
-    var hostEnd = -1;
-    for (var i = 0; i < hostEndingChars.length; i++) {
-      var hec = rest.indexOf(hostEndingChars[i]);
-      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
-        hostEnd = hec;
-    }
-
-    // at this point, either we have an explicit point where the
-    // auth portion cannot go past, or the last @ char is the decider.
-    var auth, atSign;
-    if (hostEnd === -1) {
-      // atSign can be anywhere.
-      atSign = rest.lastIndexOf('@');
-    } else {
-      // atSign must be in auth portion.
-      // http://a@b/c@d => host:b auth:a path:/c@d
-      atSign = rest.lastIndexOf('@', hostEnd);
-    }
-
-    // Now we have a portion which is definitely the auth.
-    // Pull that off.
-    if (atSign !== -1) {
-      auth = rest.slice(0, atSign);
-      rest = rest.slice(atSign + 1);
-      this.auth = decodeURIComponent(auth);
-    }
-
-    // the host is the remaining to the left of the first non-host char
-    hostEnd = -1;
-    for (var i = 0; i < nonHostChars.length; i++) {
-      var hec = rest.indexOf(nonHostChars[i]);
-      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
-        hostEnd = hec;
-    }
-    // if we still have not hit it, then the entire thing is a host.
-    if (hostEnd === -1)
-      hostEnd = rest.length;
-
-    this.host = rest.slice(0, hostEnd);
-    rest = rest.slice(hostEnd);
-
-    // pull out port.
-    this.parseHost();
-
-    // we've indicated that there is a hostname,
-    // so even if it's empty, it has to be present.
-    this.hostname = this.hostname || '';
-
-    // if hostname begins with [ and ends with ]
-    // assume that it's an IPv6 address.
-    var ipv6Hostname = this.hostname[0] === '[' &&
-        this.hostname[this.hostname.length - 1] === ']';
-
-    // validate a little.
-    if (!ipv6Hostname) {
-      var hostparts = this.hostname.split(/\./);
-      for (var i = 0, l = hostparts.length; i < l; i++) {
-        var part = hostparts[i];
-        if (!part) continue;
-        if (!part.match(hostnamePartPattern)) {
-          var newpart = '';
-          for (var j = 0, k = part.length; j < k; j++) {
-            if (part.charCodeAt(j) > 127) {
-              // we replace non-ASCII char with a temporary placeholder
-              // we need this to make sure size of hostname is not
-              // broken by replacing non-ASCII by nothing
-              newpart += 'x';
-            } else {
-              newpart += part[j];
-            }
-          }
-          // we test again with ASCII char only
-          if (!newpart.match(hostnamePartPattern)) {
-            var validParts = hostparts.slice(0, i);
-            var notHost = hostparts.slice(i + 1);
-            var bit = part.match(hostnamePartStart);
-            if (bit) {
-              validParts.push(bit[1]);
-              notHost.unshift(bit[2]);
-            }
-            if (notHost.length) {
-              rest = '/' + notHost.join('.') + rest;
-            }
-            this.hostname = validParts.join('.');
-            break;
-          }
-        }
-      }
-    }
-
-    if (this.hostname.length > hostnameMaxLen) {
-      this.hostname = '';
-    } else {
-      // hostnames are always lower case.
-      this.hostname = this.hostname.toLowerCase();
-    }
-
-    if (!ipv6Hostname) {
-      // IDNA Support: Returns a puny coded representation of "domain".
-      // It only converts the part of the domain name that
-      // has non ASCII characters. I.e. it dosent matter if
-      // you call it with a domain that already is in ASCII.
-      var domainArray = this.hostname.split('.');
-      var newOut = [];
-      for (var i = 0; i < domainArray.length; ++i) {
-        var s = domainArray[i];
-        newOut.push(s.match(/[^A-Za-z0-9_-]/) ?
-            'xn--' + punycode.encode(s) : s);
-      }
-      this.hostname = newOut.join('.');
-    }
-
-    var p = this.port ? ':' + this.port : '';
-    var h = this.hostname || '';
-    this.host = h + p;
-    this.href += this.host;
-
-    // strip [ and ] from the hostname
-    // the host field still retains them, though
-    if (ipv6Hostname) {
-      this.hostname = this.hostname.substr(1, this.hostname.length - 2);
-      if (rest[0] !== '/') {
-        rest = '/' + rest;
-      }
-    }
-  }
-
-  // now rest is set to the post-host stuff.
-  // chop off any delim chars.
-  if (!unsafeProtocol[lowerProto]) {
-
-    // First, make 100% sure that any "autoEscape" chars get
-    // escaped, even if encodeURIComponent doesn't think they
-    // need to be.
-    for (var i = 0, l = autoEscape.length; i < l; i++) {
-      var ae = autoEscape[i];
-      var esc = encodeURIComponent(ae);
-      if (esc === ae) {
-        esc = escape(ae);
-      }
-      rest = rest.split(ae).join(esc);
-    }
-  }
-
-
-  // chop off from the tail first.
-  var hash = rest.indexOf('#');
-  if (hash !== -1) {
-    // got a fragment string.
-    this.hash = rest.substr(hash);
-    rest = rest.slice(0, hash);
-  }
-  var qm = rest.indexOf('?');
-  if (qm !== -1) {
-    this.search = rest.substr(qm);
-    this.query = rest.substr(qm + 1);
-    if (parseQueryString) {
-      this.query = querystring.parse(this.query);
-    }
-    rest = rest.slice(0, qm);
-  } else if (parseQueryString) {
-    // no query string, but parseQueryString still requested
-    this.search = '';
-    this.query = {};
-  }
-  if (rest) this.pathname = rest;
-  if (slashedProtocol[lowerProto] &&
-      this.hostname && !this.pathname) {
-    this.pathname = '/';
-  }
-
-  //to support http.request
-  if (this.pathname || this.search) {
-    var p = this.pathname || '';
-    var s = this.search || '';
-    this.path = p + s;
-  }
-
-  // finally, reconstruct the href based on what has been validated.
-  this.href = this.format();
-  return this;
-};
-
-// format a parsed object into a url string
-function urlFormat(obj) {
-  // ensure it's an object, and not a string url.
-  // If it's an obj, this is a no-op.
-  // this way, you can call url_format() on strings
-  // to clean up potentially wonky urls.
-  if (isString(obj)) obj = urlParse(obj);
-  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
-  return obj.format();
-}
-
-Url.prototype.format = function() {
-  var auth = this.auth || '';
-  if (auth) {
-    auth = encodeURIComponent(auth);
-    auth = auth.replace(/%3A/i, ':');
-    auth += '@';
-  }
-
-  var protocol = this.protocol || '',
-      pathname = this.pathname || '',
-      hash = this.hash || '',
-      host = false,
-      query = '';
-
-  if (this.host) {
-    host = auth + this.host;
-  } else if (this.hostname) {
-    host = auth + (this.hostname.indexOf(':') === -1 ?
-        this.hostname :
-        '[' + this.hostname + ']');
-    if (this.port) {
-      host += ':' + this.port;
-    }
-  }
-
-  if (this.query &&
-      isObject(this.query) &&
-      Object.keys(this.query).length) {
-    query = querystring.stringify(this.query);
-  }
-
-  var search = this.search || (query && ('?' + query)) || '';
-
-  if (protocol && protocol.substr(-1) !== ':') protocol += ':';
-
-  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.
-  // unless they had them to begin with.
-  if (this.slashes ||
-      (!protocol || slashedProtocol[protocol]) && host !== false) {
-    host = '//' + (host || '');
-    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;
-  } else if (!host) {
-    host = '';
-  }
-
-  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;
-  if (search && search.charAt(0) !== '?') search = '?' + search;
-
-  pathname = pathname.replace(/[?#]/g, function(match) {
-    return encodeURIComponent(match);
-  });
-  search = search.replace('#', '%23');
-
-  return protocol + host + pathname + search + hash;
-};
-
-function urlResolve(source, relative) {
-  return urlParse(source, false, true).resolve(relative);
-}
-
-Url.prototype.resolve = function(relative) {
-  return this.resolveObject(urlParse(relative, false, true)).format();
-};
-
-function urlResolveObject(source, relative) {
-  if (!source) return relative;
-  return urlParse(source, false, true).resolveObject(relative);
-}
-
-Url.prototype.resolveObject = function(relative) {
-  if (isString(relative)) {
-    var rel = new Url();
-    rel.parse(relative, false, true);
-    relative = rel;
-  }
-
-  var result = new Url();
-  Object.keys(this).forEach(function(k) {
-    result[k] = this[k];
-  }, this);
-
-  // hash is always overridden, no matter what.
-  // even href="" will remove it.
-  result.hash = relative.hash;
-
-  // if the relative url is empty, then there's nothing left to do here.
-  if (relative.href === '') {
-    result.href = result.format();
-    return result;
-  }
-
-  // hrefs like //foo/bar always cut to the protocol.
-  if (relative.slashes && !relative.protocol) {
-    // take everything except the protocol from relative
-    Object.keys(relative).forEach(function(k) {
-      if (k !== 'protocol')
-        result[k] = relative[k];
-    });
-
-    //urlParse appends trailing / to urls like http://www.example.com
-    if (slashedProtocol[result.protocol] &&
-        result.hostname && !result.pathname) {
-      result.path = result.pathname = '/';
-    }
-
-    result.href = result.format();
-    return result;
-  }
-
-  if (relative.protocol && relative.protocol !== result.protocol) {
-    // if it's a known url protocol, then changing
-    // the protocol does weird things
-    // first, if it's not file:, then we MUST have a host,
-    // and if there was a path
-    // to begin with, then we MUST have a path.
-    // if it is file:, then the host is dropped,
-    // because that's known to be hostless.
-    // anything else is assumed to be absolute.
-    if (!slashedProtocol[relative.protocol]) {
-      Object.keys(relative).forEach(function(k) {
-        result[k] = relative[k];
-      });
-      result.href = result.format();
-      return result;
-    }
-
-    result.protocol = relative.protocol;
-    if (!relative.host && !hostlessProtocol[relative.protocol]) {
-      var relPath = (relative.pathname || '').split('/');
-      while (relPath.length && !(relative.host = relPath.shift()));
-      if (!relative.host) relative.host = '';
-      if (!relative.hostname) relative.hostname = '';
-      if (relPath[0] !== '') relPath.unshift('');
-      if (relPath.length < 2) relPath.unshift('');
-      result.pathname = relPath.join('/');
-    } else {
-      result.pathname = relative.pathname;
-    }
-    result.search = relative.search;
-    result.query = relative.query;
-    result.host = relative.host || '';
-    result.auth = relative.auth;
-    result.hostname = relative.hostname || relative.host;
-    result.port = relative.port;
-    // to support http.request
-    if (result.pathname || result.search) {
-      var p = result.pathname || '';
-      var s = result.search || '';
-      result.path = p + s;
-    }
-    result.slashes = result.slashes || relative.slashes;
-    result.href = result.format();
-    return result;
-  }
-
-  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),
-      isRelAbs = (
-          relative.host ||
-          relative.pathname && relative.pathname.charAt(0) === '/'
-      ),
-      mustEndAbs = (isRelAbs || isSourceAbs ||
-                    (result.host && relative.pathname)),
-      removeAllDots = mustEndAbs,
-      srcPath = result.pathname && result.pathname.split('/') || [],
-      relPath = relative.pathname && relative.pathname.split('/') || [],
-      psychotic = result.protocol && !slashedProtocol[result.protocol];
-
-  // if the url is a non-slashed url, then relative
-  // links like ../.. should be able
-  // to crawl up to the hostname, as well.  This is strange.
-  // result.protocol has already been set by now.
-  // Later on, put the first path part into the host field.
-  if (psychotic) {
-    result.hostname = '';
-    result.port = null;
-    if (result.host) {
-      if (srcPath[0] === '') srcPath[0] = result.host;
-      else srcPath.unshift(result.host);
-    }
-    result.host = '';
-    if (relative.protocol) {
-      relative.hostname = null;
-      relative.port = null;
-      if (relative.host) {
-        if (relPath[0] === '') relPath[0] = relative.host;
-        else relPath.unshift(relative.host);
-      }
-      relative.host = null;
-    }
-    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
-  }
-
-  if (isRelAbs) {
-    // it's absolute.
-    result.host = (relative.host || relative.host === '') ?
-                  relative.host : result.host;
-    result.hostname = (relative.hostname || relative.hostname === '') ?
-                      relative.hostname : result.hostname;
-    result.search = relative.search;
-    result.query = relative.query;
-    srcPath = relPath;
-    // fall through to the dot-handling below.
-  } else if (relPath.length) {
-    // it's relative
-    // throw away the existing file, and take the new path instead.
-    if (!srcPath) srcPath = [];
-    srcPath.pop();
-    srcPath = srcPath.concat(relPath);
-    result.search = relative.search;
-    result.query = relative.query;
-  } else if (!isNullOrUndefined(relative.search)) {
-    // just pull out the search.
-    // like href='?foo'.
-    // Put this after the other two cases because it simplifies the booleans
-    if (psychotic) {
-      result.hostname = result.host = srcPath.shift();
-      //occationaly the auth can get stuck only in host
-      //this especialy happens in cases like
-      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
-      var authInHost = result.host && result.host.indexOf('@') > 0 ?
-                       result.host.split('@') : false;
-      if (authInHost) {
-        result.auth = authInHost.shift();
-        result.host = result.hostname = authInHost.shift();
-      }
-    }
-    result.search = relative.search;
-    result.query = relative.query;
-    //to support http.request
-    if (!isNull(result.pathname) || !isNull(result.search)) {
-      result.path = (result.pathname ? result.pathname : '') +
-                    (result.search ? result.search : '');
-    }
-    result.href = result.format();
-    return result;
-  }
-
-  if (!srcPath.length) {
-    // no path at all.  easy.
-    // we've already handled the other stuff above.
-    result.pathname = null;
-    //to support http.request
-    if (result.search) {
-      result.path = '/' + result.search;
-    } else {
-      result.path = null;
-    }
-    result.href = result.format();
-    return result;
-  }
-
-  // if a url ENDs in . or .., then it must get a trailing slash.
-  // however, if it ends in anything else non-slashy,
-  // then it must NOT get a trailing slash.
-  var last = srcPath.slice(-1)[0];
-  var hasTrailingSlash = (
-      (result.host || relative.host) && (last === '.' || last === '..') ||
-      last === '');
-
-  // strip single dots, resolve double dots to parent dir
-  // if the path tries to go above the root, `up` ends up > 0
-  var up = 0;
-  for (var i = srcPath.length; i >= 0; i--) {
-    last = srcPath[i];
-    if (last == '.') {
-      srcPath.splice(i, 1);
-    } else if (last === '..') {
-      srcPath.splice(i, 1);
-      up++;
-    } else if (up) {
-      srcPath.splice(i, 1);
-      up--;
-    }
-  }
-
-  // if the path is allowed to go above the root, restore leading ..s
-  if (!mustEndAbs && !removeAllDots) {
-    for (; up--; up) {
-      srcPath.unshift('..');
-    }
-  }
-
-  if (mustEndAbs && srcPath[0] !== '' &&
-      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
-    srcPath.unshift('');
-  }
-
-  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {
-    srcPath.push('');
-  }
-
-  var isAbsolute = srcPath[0] === '' ||
-      (srcPath[0] && srcPath[0].charAt(0) === '/');
-
-  // put the host back
-  if (psychotic) {
-    result.hostname = result.host = isAbsolute ? '' :
-                                    srcPath.length ? srcPath.shift() : '';
-    //occationaly the auth can get stuck only in host
-    //this especialy happens in cases like
-    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
-    var authInHost = result.host && result.host.indexOf('@') > 0 ?
-                     result.host.split('@') : false;
-    if (authInHost) {
-      result.auth = authInHost.shift();
-      result.host = result.hostname = authInHost.shift();
-    }
-  }
-
-  mustEndAbs = mustEndAbs || (result.host && srcPath.length);
-
-  if (mustEndAbs && !isAbsolute) {
-    srcPath.unshift('');
-  }
-
-  if (!srcPath.length) {
-    result.pathname = null;
-    result.path = null;
-  } else {
-    result.pathname = srcPath.join('/');
-  }
-
-  //to support request.http
-  if (!isNull(result.pathname) || !isNull(result.search)) {
-    result.path = (result.pathname ? result.pathname : '') +
-                  (result.search ? result.search : '');
-  }
-  result.auth = relative.auth || result.auth;
-  result.slashes = result.slashes || relative.slashes;
-  result.href = result.format();
-  return result;
-};
-
-Url.prototype.parseHost = function() {
-  var host = this.host;
-  var port = portPattern.exec(host);
-  if (port) {
-    port = port[0];
-    if (port !== ':') {
-      this.port = port.substr(1);
-    }
-    host = host.substr(0, host.length - port.length);
-  }
-  if (host) this.hostname = host;
-};
-
-function isString(arg) {
-  return typeof arg === "string";
-}
-
-function isObject(arg) {
-  return typeof arg === 'object' && arg !== null;
-}
-
-function isNull(arg) {
-  return arg === null;
-}
-function isNullOrUndefined(arg) {
-  return  arg == null;
-}
-
-},{"punycode":43,"querystring":46}],51:[function(require,module,exports){
-(function (Buffer){
-function FilerBuffer (subject, encoding, nonZero) {
-
-  // Automatically turn ArrayBuffer into Uint8Array so that underlying
-  // Buffer code doesn't just throw away and ignore ArrayBuffer data.
-  if (subject instanceof ArrayBuffer) {
-    subject = new Uint8Array(subject);
-  }
-
-  return new Buffer(subject, encoding, nonZero);
-};
-
-// Inherit prototype from Buffer
-FilerBuffer.prototype = Object.create(Buffer.prototype);
-FilerBuffer.prototype.constructor = FilerBuffer;
-
-// Also copy static methods onto FilerBuffer ctor
-Object.keys(Buffer).forEach(function (p) {
-  if (Buffer.hasOwnProperty(p)) {
-    FilerBuffer[p] = Buffer[p];
-  }
-});
-
-module.exports = FilerBuffer;
-
-}).call(this,require("buffer").Buffer)
-},{"buffer":8}],52:[function(require,module,exports){
-var O_READ = 'READ';
-var O_WRITE = 'WRITE';
-var O_CREATE = 'CREATE';
-var O_EXCLUSIVE = 'EXCLUSIVE';
-var O_TRUNCATE = 'TRUNCATE';
-var O_APPEND = 'APPEND';
-var XATTR_CREATE = 'CREATE';
-var XATTR_REPLACE = 'REPLACE';
-
-module.exports = {
-  FILE_SYSTEM_NAME: 'local',
-
-  FILE_STORE_NAME: 'files',
-
-  IDB_RO: 'readonly',
-  IDB_RW: 'readwrite',
-
-  WSQL_VERSION: "1",
-  WSQL_SIZE: 5 * 1024 * 1024,
-  WSQL_DESC: "FileSystem Storage",
-
-  NODE_TYPE_FILE: 'FILE',
-  NODE_TYPE_DIRECTORY: 'DIRECTORY',
-  NODE_TYPE_SYMBOLIC_LINK: 'SYMLINK',
-  NODE_TYPE_META: 'META',
-
-  S_IFREG: 0x8000,
-  S_IFDIR: 0x4000,
-  S_IFLNK: 0xA000,
-
-  DEFAULT_DIR_PERMISSIONS: 0x1ED, // 755
-  DEFAULT_FILE_PERMISSIONS: 0x1A4, // 644
-
-  SYMLOOP_MAX: 10,
-
-  BINARY_MIME_TYPE: 'application/octet-stream',
-  JSON_MIME_TYPE: 'application/json',
-
-  ROOT_DIRECTORY_NAME: '/', // basename(normalize(path))
-
-  // FS Mount Flags
-  FS_FORMAT: 'FORMAT',
-  FS_NOCTIME: 'NOCTIME',
-  FS_NOMTIME: 'NOMTIME',
-  FS_NODUPEIDCHECK: 'FS_NODUPEIDCHECK',
-
-  // FS File Open Flags
-  O_READ: O_READ,
-  O_WRITE: O_WRITE,
-  O_CREATE: O_CREATE,
-  O_EXCLUSIVE: O_EXCLUSIVE,
-  O_TRUNCATE: O_TRUNCATE,
-  O_APPEND: O_APPEND,
-
-  O_FLAGS: {
-    'r': [O_READ],
-    'r+': [O_READ, O_WRITE],
-    'w': [O_WRITE, O_CREATE, O_TRUNCATE],
-    'w+': [O_WRITE, O_READ, O_CREATE, O_TRUNCATE],
-    'wx': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],
-    'wx+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],
-    'a': [O_WRITE, O_CREATE, O_APPEND],
-    'a+': [O_WRITE, O_READ, O_CREATE, O_APPEND],
-    'ax': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_APPEND],
-    'ax+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_APPEND]
-  },
-
-  XATTR_CREATE: XATTR_CREATE,
-  XATTR_REPLACE: XATTR_REPLACE,
-
-  FS_READY: 'READY',
-  FS_PENDING: 'PENDING',
-  FS_ERROR: 'ERROR',
-
-  SUPER_NODE_ID: '00000000-0000-0000-0000-000000000000',
-
-  // Reserved File Descriptors for streams
-  STDIN: 0,
-  STDOUT: 1,
-  STDERR: 2,
-  FIRST_DESCRIPTOR: 3,
-
-  ENVIRONMENT: {
-    TMP: '/tmp',
-    PATH: ''
-  }
-};
-
-},{}],53:[function(require,module,exports){
-var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;
-
-module.exports = function DirectoryEntry(id, type) {
-  this.id = id;
-  this.type = type || NODE_TYPE_FILE;
-};
-
-},{"./constants.js":52}],54:[function(require,module,exports){
-(function (Buffer){
-// Adapt encodings to work with Buffer or Uint8Array, they expect the latter
-function decode(buf) {
-  return buf.toString('utf8');
-}
-
-function encode(string) {
-  return new Buffer(string, 'utf8');
-}
-
-module.exports = {
-  encode: encode,
-  decode: decode
-};
-
-}).call(this,require("buffer").Buffer)
-},{"buffer":8}],55:[function(require,module,exports){
-var errors = {};
-[
-  /**
-   * node.js errors - we only use some of these, add as needed.
-   */
-  //'-1:UNKNOWN:unknown error',
-  //'0:OK:success',
-  //'1:EOF:end of file',
-  //'2:EADDRINFO:getaddrinfo error',
-  //'3:EACCES:permission denied',
-  //'4:EAGAIN:resource temporarily unavailable',
-  //'5:EADDRINUSE:address already in use',
-  //'6:EADDRNOTAVAIL:address not available',
-  //'7:EAFNOSUPPORT:address family not supported',
-  //'8:EALREADY:connection already in progress',
-  '9:EBADF:bad file descriptor',
-  '10:EBUSY:resource busy or locked',
-  //'11:ECONNABORTED:software caused connection abort',
-  //'12:ECONNREFUSED:connection refused',
-  //'13:ECONNRESET:connection reset by peer',
-  //'14:EDESTADDRREQ:destination address required',
-  //'15:EFAULT:bad address in system call argument',
-  //'16:EHOSTUNREACH:host is unreachable',
-  //'17:EINTR:interrupted system call',
-  '18:EINVAL:invalid argument',
-  //'19:EISCONN:socket is already connected',
-  //'20:EMFILE:too many open files',
-  //'21:EMSGSIZE:message too long',
-  //'22:ENETDOWN:network is down',
-  //'23:ENETUNREACH:network is unreachable',
-  //'24:ENFILE:file table overflow',
-  //'25:ENOBUFS:no buffer space available',
-  //'26:ENOMEM:not enough memory',
-  '27:ENOTDIR:not a directory',
-  '28:EISDIR:illegal operation on a directory',
-  //'29:ENONET:machine is not on the network',
-  // errno 30 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js
-  //'31:ENOTCONN:socket is not connected',
-  //'32:ENOTSOCK:socket operation on non-socket',
-  //'33:ENOTSUP:operation not supported on socket',
-  '34:ENOENT:no such file or directory',
-  //'35:ENOSYS:function not implemented',
-  //'36:EPIPE:broken pipe',
-  //'37:EPROTO:protocol error',
-  //'38:EPROTONOSUPPORT:protocol not supported',
-  //'39:EPROTOTYPE:protocol wrong type for socket',
-  //'40:ETIMEDOUT:connection timed out',
-  //'41:ECHARSET:invalid Unicode character',
-  //'42:EAIFAMNOSUPPORT:address family for hostname not supported',
-  // errno 43 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js
-  //'44:EAISERVICE:servname not supported for ai_socktype',
-  //'45:EAISOCKTYPE:ai_socktype not supported',
-  //'46:ESHUTDOWN:cannot send after transport endpoint shutdown',
-  '47:EEXIST:file already exists',
-  //'48:ESRCH:no such process',
-  //'49:ENAMETOOLONG:name too long',
-  '50:EPERM:operation not permitted',
-  '51:ELOOP:too many symbolic links encountered',
-  //'52:EXDEV:cross-device link not permitted',
-  '53:ENOTEMPTY:directory not empty',
-  //'54:ENOSPC:no space left on device',
-  '55:EIO:i/o error',
-  //'56:EROFS:read-only file system',
-  //'57:ENODEV:no such device',
-  //'58:ESPIPE:invalid seek',
-  //'59:ECANCELED:operation canceled',
-
-  /**
-   * Filer specific errors
-   */
-  '1000:ENOTMOUNTED:not mounted',
-  '1001:EFILESYSTEMERROR:missing super node, use \'FORMAT\' flag to format filesystem.',
-  '1002:ENOATTR:attribute does not exist'
-
-].forEach(function(e) {
-  e = e.split(':');
-  var errno = +e[0];
-  var errName = e[1];
-  var defaultMessage = e[2];
-
-  function FilerError(msg, path) {
-    Error.call(this);
-
-    this.name = errName;
-    this.code = errName;
-    this.errno = errno;
-    this.message = msg || defaultMessage;
-    if(path) {
-      this.path = path;
-    }
-    this.stack = (new Error(this.message)).stack;
-  }
-  FilerError.prototype = Object.create(Error.prototype);
-  FilerError.prototype.constructor = FilerError;
-  FilerError.prototype.toString = function() {
-    var pathInfo = this.path ? (', \'' + this.path + '\'') : '';
-    return this.name + ': ' + this.message + pathInfo;
-  };
-
-  // We expose the error as both Errors.EINVAL and Errors[18]
-  errors[errName] = errors[errno] = FilerError;
-});
-
-module.exports = errors;
-
-},{}],56:[function(require,module,exports){
-var _ = require('../../lib/nodash.js');
-
-var Path = require('../path.js');
-var normalize = Path.normalize;
-var dirname = Path.dirname;
-var basename = Path.basename;
-var isAbsolutePath = Path.isAbsolute;
-var isNullPath = Path.isNull;
-
-var Constants = require('../constants.js');
-var NODE_TYPE_FILE = Constants.NODE_TYPE_FILE;
-var NODE_TYPE_DIRECTORY = Constants.NODE_TYPE_DIRECTORY;
-var NODE_TYPE_SYMBOLIC_LINK = Constants.NODE_TYPE_SYMBOLIC_LINK;
-var NODE_TYPE_META = Constants.NODE_TYPE_META;
-
-var ROOT_DIRECTORY_NAME = Constants.ROOT_DIRECTORY_NAME;
-var SUPER_NODE_ID = Constants.SUPER_NODE_ID;
-var SYMLOOP_MAX = Constants.SYMLOOP_MAX;
-
-var O_READ = Constants.O_READ;
-var O_WRITE = Constants.O_WRITE;
-var O_CREATE = Constants.O_CREATE;
-var O_EXCLUSIVE = Constants.O_EXCLUSIVE;
-var O_TRUNCATE = Constants.O_TRUNCATE;
-var O_APPEND = Constants.O_APPEND;
-var O_FLAGS = Constants.O_FLAGS;
-
-var XATTR_CREATE = Constants.XATTR_CREATE;
-var XATTR_REPLACE = Constants.XATTR_REPLACE;
-var FS_NOMTIME = Constants.FS_NOMTIME;
-var FS_NOCTIME = Constants.FS_NOCTIME;
-
-var Encoding = require('../encoding.js');
-var Errors = require('../errors.js');
-var DirectoryEntry = require('../directory-entry.js');
-var OpenFileDescription = require('../open-file-description.js');
-var SuperNode = require('../super-node.js');
-var Node = require('../node.js');
-var Stats = require('../stats.js');
-var Buffer = require('../buffer.js');
-
-/**
- * Update node times. Only passed times are modified (undefined times are ignored)
- * and filesystem flags are examined in order to override update logic.
- */
-function update_node_times(context, path, node, times, callback) {
-  var update = false;
-
-  // Honour mount flags for how we update times
-  var flags = context.flags;
-  if(_(flags).contains(FS_NOCTIME)) {
-    delete times.ctime;
-  }
-   if(_(flags).contains(FS_NOMTIME)) {
-    delete times.mtime;
-  }
-
-  if(times.ctime) {
-    node.ctime = times.ctime;
-    // We don't do atime tracking for perf reasons, but do mirror ctime
-    node.atime = times.ctime;
-    update = true;
-  }
-  if(times.atime) {
-    // The only time we explicitly pass atime is when utimes(), futimes() is called.
-    // Override ctime mirror here if so
-    node.atime = times.atime;
-    update = true;
-  }
-  if(times.mtime) {
-    node.mtime = times.mtime;
-    update = true;
-  }
-
-  function complete(error) {
-    context.changes.push({ event: 'change', path: path });
-    callback(error);
-  }
-
-  if(update) {
-    context.putObject(node.id, node, complete);
-  } else {
-    complete();
-  }
-}
-
-/**
- * make_node()
- */
-// in: file or directory path
-// out: new node representing file/directory
-function make_node(context, path, type, callback) {
-  if(type !== NODE_TYPE_DIRECTORY && type !== NODE_TYPE_FILE) {
-    return callback(new Errors.EINVAL('type must be a directory or file', path));
-  }
-
-  path = normalize(path);
-
-  var name = basename(path);
-  var parentPath = dirname(path);
-  var parentNode;
-  var parentNodeData;
-  var node;
-
-  // Check if the parent node exists
-  function create_node_in_parent(error, parentDirectoryNode) {
-    if(error) {
-      callback(error);
-    } else if(parentDirectoryNode.type !== NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));
-    } else {
-      parentNode = parentDirectoryNode;
-      find_node(context, path, check_if_node_exists);
-    }
-  }
-
-  // Check if the node to be created already exists
-  function check_if_node_exists(error, result) {
-    if(!error && result) {
-      callback(new Errors.EEXIST('path name already exists', path));
-    } else if(error && !(error instanceof Errors.ENOENT)) {
-      callback(error);
-    } else {
-      context.getObject(parentNode.data, create_node);
-    }
-  }
-
-  // Create the new node
-  function create_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      parentNodeData = result;
-      Node.create({
-        path: path,
-        guid: context.guid,
-        type: type
-      }, function(error, result) {
-        if(error) {
-          callback(error);
-          return;
-        }
-        node = result;
-        node.nlinks += 1;
-        context.putObject(node.id, node, update_parent_node_data);
-      });
-    }
-  }
-
-  // Update parent node time
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, node, { mtime: now, ctime: now }, callback);
-    }
-  }
-
-  // Update the parent nodes data
-  function update_parent_node_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      parentNodeData[name] = new DirectoryEntry(node.id, type);
-      context.putObject(parentNode.data, parentNodeData, update_time);
-    }
-  }
-
-  // Find the parent node
-  find_node(context, parentPath, create_node_in_parent);
-}
-
-/**
- * find_node
- */
-// in: file or directory path
-// out: node structure, or error
-function find_node(context, path, callback) {
-  path = normalize(path);
-  if(!path) {
-    return callback(new Errors.ENOENT('path is an empty string'));
-  }
-  var name = basename(path);
-  var parentPath = dirname(path);
-  var followedCount = 0;
-
-  function read_root_directory_node(error, superNode) {
-    if(error) {
-      callback(error);
-    } else if(!superNode || superNode.type !== NODE_TYPE_META || !superNode.rnode) {
-      callback(new Errors.EFILESYSTEMERROR());
-    } else {
-      context.getObject(superNode.rnode, check_root_directory_node);
-    }
-  }
-
-  function check_root_directory_node(error, rootDirectoryNode) {
-    if(error) {
-      callback(error);
-    } else if(!rootDirectoryNode) {
-      callback(new Errors.ENOENT());
-    } else {
-      callback(null, rootDirectoryNode);
-    }
-  }
-
-  // in: parent directory node
-  // out: parent directory data
-  function read_parent_directory_data(error, parentDirectoryNode) {
-    if(error) {
-      callback(error);
-    } else if(parentDirectoryNode.type !== NODE_TYPE_DIRECTORY || !parentDirectoryNode.data) {
-      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));
-    } else {
-      context.getObject(parentDirectoryNode.data, get_node_from_parent_directory_data);
-    }
-  }
-
-  // in: parent directory data
-  // out: searched node
-  function get_node_from_parent_directory_data(error, parentDirectoryData) {
-    if(error) {
-      callback(error);
-    } else {
-      if(!_(parentDirectoryData).has(name)) {
-        callback(new Errors.ENOENT(null, path));
-      } else {
-        var nodeId = parentDirectoryData[name].id;
-        context.getObject(nodeId, is_symbolic_link);
-      }
-    }
-  }
-
-  function is_symbolic_link(error, node) {
-    if(error) {
-      callback(error);
-    } else {
-      if(node.type == NODE_TYPE_SYMBOLIC_LINK) {
-        followedCount++;
-        if(followedCount > SYMLOOP_MAX){
-          callback(new Errors.ELOOP(null, path));
-        } else {
-          follow_symbolic_link(node.data);
-        }
-      } else {
-        callback(null, node);
-      }
-    }
-  }
-
-  function follow_symbolic_link(data) {
-    data = normalize(data);
-    parentPath = dirname(data);
-    name = basename(data);
-    if(ROOT_DIRECTORY_NAME == name) {
-      context.getObject(SUPER_NODE_ID, read_root_directory_node);
-    } else {
-      find_node(context, parentPath, read_parent_directory_data);
-    }
-  }
-
-  if(ROOT_DIRECTORY_NAME == name) {
-    context.getObject(SUPER_NODE_ID, read_root_directory_node);
-  } else {
-    find_node(context, parentPath, read_parent_directory_data);
-  }
-}
-
-
-/**
- * set extended attribute (refactor)
- */
-function set_extended_attribute (context, path, node, name, value, flag, callback) {
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      update_node_times(context, path, node, { ctime: Date.now() }, callback);
-    }
-  }
-
-  var xattrs = node.xattrs;
-
-  if (flag === XATTR_CREATE && xattrs.hasOwnProperty(name)) {
-    callback(new Errors.EEXIST('attribute already exists', path));
-  }
-  else if (flag === XATTR_REPLACE && !xattrs.hasOwnProperty(name)) {
-    callback(new Errors.ENOATTR(null, path));
-  }
-  else {
-    xattrs[name] = value;
-    context.putObject(node.id, node, update_time);
-  }
-}
-
-/**
- * ensure_root_directory. Creates a root node if necessary.
- *
- * Note: this should only be invoked when formatting a new file system.
- * Multiple invocations of this by separate instances will still result
- * in only a single super node.
- */
-function ensure_root_directory(context, callback) {
-  var superNode;
-  var directoryNode;
-  var directoryData;
-
-  function ensure_super_node(error, existingNode) {
-    if(!error && existingNode) {
-      // Another instance has beat us and already created the super node.
-      callback();
-    } else if(error && !(error instanceof Errors.ENOENT)) {
-      callback(error);
-    } else {
-      SuperNode.create({ guid: context.guid }, function(error, result) {
-        if(error) {
-          callback(error);
-          return;
-        }
-        superNode = result;
-        context.putObject(superNode.id, superNode, write_directory_node);
-      });
-    }
-  }
-
-  function write_directory_node(error) {
-    if(error) {
-      callback(error);
-    } else {
-      Node.create({
-        guid: context.guid,
-        id: superNode.rnode,
-        type: NODE_TYPE_DIRECTORY,
-        path: ROOT_DIRECTORY_NAME
-      }, function(error, result) {
-        if(error) {
-          callback(error);
-          return;
-        }
-        directoryNode = result;
-        directoryNode.nlinks += 1;
-        context.putObject(directoryNode.id, directoryNode, write_directory_data);
-      });
-    }
-  }
-
-  function write_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = {};
-      context.putObject(directoryNode.data, directoryData, callback);
-    }
-  }
-
-  context.getObject(SUPER_NODE_ID, ensure_super_node);
-}
-
-/**
- * make_directory
- */
-function make_directory(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-  var parentDirectoryNode;
-  var parentDirectoryData;
-
-  function check_if_directory_exists(error, result) {
-    if(!error && result) {
-      callback(new Errors.EEXIST(null, path));
-    } else if(error && !(error instanceof Errors.ENOENT)) {
-      callback(error);
-    } else {
-      find_node(context, parentPath, read_parent_directory_data);
-    }
-  }
-
-  function read_parent_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      parentDirectoryNode = result;
-      context.getObject(parentDirectoryNode.data, write_directory_node);
-    }
-  }
-
-  function write_directory_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      parentDirectoryData = result;
-      Node.create({
-        guid: context.guid,
-        type: NODE_TYPE_DIRECTORY,
-        path: path
-      }, function(error, result) {
-        if(error) {
-          callback(error);
-          return;
-        }
-        directoryNode = result;
-        directoryNode.nlinks += 1;
-        context.putObject(directoryNode.id, directoryNode, write_directory_data);
-      });
-    }
-  }
-
-  function write_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = {};
-      context.putObject(directoryNode.data, directoryData, update_parent_directory_data);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, callback);
-    }
-  }
-
-  function update_parent_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      parentDirectoryData[name] = new DirectoryEntry(directoryNode.id, NODE_TYPE_DIRECTORY);
-      context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);
-    }
-  }
-
-  find_node(context, path, check_if_directory_exists);
-}
-
-/**
- * remove_directory
- */
-function remove_directory(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-  var parentDirectoryNode;
-  var parentDirectoryData;
-
-  function read_parent_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      parentDirectoryNode = result;
-      context.getObject(parentDirectoryNode.data, check_if_node_exists);
-    }
-  }
-
-  function check_if_node_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else if(ROOT_DIRECTORY_NAME == name) {
-      callback(new Errors.EBUSY(null, path));
-    } else if(!_(result).has(name)) {
-      callback(new Errors.ENOENT(null, path));
-    } else {
-      parentDirectoryData = result;
-      directoryNode = parentDirectoryData[name].id;
-      context.getObject(directoryNode, check_if_node_is_directory);
-    }
-  }
-
-  function check_if_node_is_directory(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type != NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOTDIR(null, path));
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_directory_is_empty);
-    }
-  }
-
-  function check_if_directory_is_empty(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(_(directoryData).size() > 0) {
-        callback(new Errors.ENOTEMPTY(null, path));
-      } else {
-        remove_directory_entry_from_parent_directory_node();
-      }
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, remove_directory_node);
-    }
-  }
-
-  function remove_directory_entry_from_parent_directory_node() {
-    delete parentDirectoryData[name];
-    context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);
-  }
-
-  function remove_directory_node(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.delete(directoryNode.id, remove_directory_data);
-    }
-  }
-
-  function remove_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.delete(directoryNode.data, callback);
-    }
-  }
-
-  find_node(context, parentPath, read_parent_directory_data);
-}
-
-function open_file(context, path, flags, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-  var directoryEntry;
-  var fileNode;
-  var fileData;
-
-  var followedCount = 0;
-
-  if(ROOT_DIRECTORY_NAME == name) {
-    if(_(flags).contains(O_WRITE)) {
-      callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
-    } else {
-      find_node(context, path, set_file_node);
-    }
-  } else {
-    find_node(context, parentPath, read_directory_data);
-  }
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type !== NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOENT(null, path));
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-    }
-  }
-
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(_(directoryData).has(name)) {
-        if(_(flags).contains(O_EXCLUSIVE)) {
-          callback(new Errors.ENOENT('O_CREATE and O_EXCLUSIVE are set, and the named file exists', path));
-        } else {
-          directoryEntry = directoryData[name];
-          if(directoryEntry.type == NODE_TYPE_DIRECTORY && _(flags).contains(O_WRITE)) {
-            callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
-          } else {
-            context.getObject(directoryEntry.id, check_if_symbolic_link);
-          }
-        }
-      } else {
-        if(!_(flags).contains(O_CREATE)) {
-          callback(new Errors.ENOENT('O_CREATE is not set and the named file does not exist', path));
-        } else {
-          write_file_node();
-        }
-      }
-    }
-  }
-
-  function check_if_symbolic_link(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      var node = result;
-      if(node.type == NODE_TYPE_SYMBOLIC_LINK) {
-        followedCount++;
-        if(followedCount > SYMLOOP_MAX){
-          callback(new Errors.ELOOP(null, path));
-        } else {
-          follow_symbolic_link(node.data);
-        }
-      } else {
-        set_file_node(undefined, node);
-      }
-    }
-  }
-
-  function follow_symbolic_link(data) {
-    data = normalize(data);
-    parentPath = dirname(data);
-    name = basename(data);
-    if(ROOT_DIRECTORY_NAME == name) {
-      if(_(flags).contains(O_WRITE)) {
-        callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
-      } else {
-        find_node(context, path, set_file_node);
-      }
-    }
-    find_node(context, parentPath, read_directory_data);
-  }
-
-  function set_file_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      callback(null, fileNode);
-    }
-  }
-
-  function write_file_node() {
-    Node.create({
-      guid: context.guid,
-      type: NODE_TYPE_FILE,
-      path: path
-    }, function(error, result) {
-      if(error) {
-        callback(error);
-        return;
-      }
-      fileNode = result;
-      fileNode.nlinks += 1;
-      context.putObject(fileNode.id, fileNode, write_file_data);
-    });
-  }
-
-  function write_file_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      fileData = new Buffer(0);
-      fileData.fill(0);
-      context.putBuffer(fileNode.data, fileData, update_directory_data);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, handle_update_result);
-    }
-  }
-
-  function update_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_FILE);
-      context.putObject(directoryNode.data, directoryData, update_time);
-    }
-  }
-
-  function handle_update_result(error) {
-    if(error) {
-      callback(error);
-    } else {
-      callback(null, fileNode);
-    }
-  }
-}
-
-function replace_data(context, ofd, buffer, offset, length, callback) {
-  var fileNode;
-
-  function return_nbytes(error) {
-    if(error) {
-      callback(error);
-    } else {
-      callback(null, length);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);
-    }
-  }
-
-  function update_file_node(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.putObject(fileNode.id, fileNode, update_time);
-    }
-  }
-
-  function write_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      var newData = new Buffer(length);
-      newData.fill(0);
-      buffer.copy(newData, 0, offset, offset + length);
-      ofd.position = length;
-
-      fileNode.size = length;
-      fileNode.version += 1;
-
-      context.putBuffer(fileNode.data, newData, update_file_node);
-    }
-  }
-
-  context.getObject(ofd.id, write_file_data);
-}
-
-function write_data(context, ofd, buffer, offset, length, position, callback) {
-  var fileNode;
-  var fileData;
-
-  function return_nbytes(error) {
-    if(error) {
-      callback(error);
-    } else {
-      callback(null, length);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);
-    }
-  }
-
-  function update_file_node(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.putObject(fileNode.id, fileNode, update_time);
-    }
-  }
-
-  function update_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileData = result;
-      if(!fileData) {
-        return callback(new Errors.EIO('Expected Buffer'));
-      }
-      var _position = (!(undefined === position || null === position)) ? position : ofd.position;
-      var newSize = Math.max(fileData.length, _position + length);
-      var newData = new Buffer(newSize);
-      newData.fill(0);
-      if(fileData) {
-        fileData.copy(newData);
-      }
-      buffer.copy(newData, _position, offset, offset + length);
-      if(undefined === position) {
-        ofd.position += length;
-      }
-
-      fileNode.size = newSize;
-      fileNode.version += 1;
-
-      context.putBuffer(fileNode.data, newData, update_file_node);
-    }
-  }
-
-  function read_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      context.getBuffer(fileNode.data, update_file_data);
-    }
-  }
-
-  context.getObject(ofd.id, read_file_data);
-}
-
-function read_data(context, ofd, buffer, offset, length, position, callback) {
-  var fileNode;
-  var fileData;
-
-  function handle_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileData = result;
-      if(!fileData) {
-        return callback(new Errors.EIO('Expected Buffer'));
-      }
-      var _position = (!(undefined === position || null === position)) ? position : ofd.position;
-      length = (_position + length > buffer.length) ? length - _position : length;
-      fileData.copy(buffer, offset, _position, _position + length);
-      if(undefined === position) {
-        ofd.position += length;
-      }
-      callback(null, length);
-    }
-  }
-
-  function read_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type === NODE_TYPE_DIRECTORY) {
-      callback(new Errors.EISDIR('the named file is a directory', ofd.path));
-    } else {
-      fileNode = result;
-      context.getBuffer(fileNode.data, handle_file_data);
-    }
-  }
-
-  context.getObject(ofd.id, read_file_data);
-}
-
-function stat_file(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  find_node(context, path, callback);
-}
-
-function fstat_file(context, ofd, callback) {
-  ofd.getNode(context, callback);
-}
-
-function lstat_file(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-
-  if(ROOT_DIRECTORY_NAME == name) {
-    find_node(context, path, callback);
-  } else {
-    find_node(context, parentPath, read_directory_data);
-  }
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-    }
-  }
-
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(!_(directoryData).has(name)) {
-        callback(new Errors.ENOENT('a component of the path does not name an existing file', path));
-      } else {
-        context.getObject(directoryData[name].id, callback);
-      }
-    }
-  }
-}
-
-function link_node(context, oldpath, newpath, callback) {
-  oldpath = normalize(oldpath);
-  var oldname = basename(oldpath);
-  var oldParentPath = dirname(oldpath);
-
-  newpath = normalize(newpath);
-  var newname = basename(newpath);
-  var newParentPath = dirname(newpath);
-  var ctime = Date.now();
-
-  var oldDirectoryNode;
-  var oldDirectoryData;
-  var newDirectoryNode;
-  var newDirectoryData;
-  var fileNodeID;
-  var fileNode;
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);
-    }
-  }
-
-  function update_file_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      fileNode.nlinks += 1;
-      context.putObject(fileNode.id, fileNode, update_time);
-    }
-  }
-
-  function read_file_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      context.getObject(fileNodeID, update_file_node);
-    }
-  }
-
-  function check_if_new_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newDirectoryData = result;
-      if(_(newDirectoryData).has(newname)) {
-        callback(new Errors.EEXIST('newpath resolves to an existing file', newname));
-      } else {
-        newDirectoryData[newname] = oldDirectoryData[oldname];
-        fileNodeID = newDirectoryData[newname].id;
-        context.putObject(newDirectoryNode.data, newDirectoryData, read_file_node);
-      }
-    }
-  }
-
-  function read_new_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newDirectoryNode = result;
-      context.getObject(newDirectoryNode.data, check_if_new_file_exists);
-    }
-  }
-
-  function check_if_old_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      oldDirectoryData = result;
-      if(!_(oldDirectoryData).has(oldname)) {
-        callback(new Errors.ENOENT('a component of either path prefix does not exist', oldname));
-      } else if(oldDirectoryData[oldname].type === NODE_TYPE_DIRECTORY) {
-        callback(new Errors.EPERM('oldpath refers to a directory'));
-      } else {
-        find_node(context, newParentPath, read_new_directory_data);
-      }
-    }
-  }
-
-  function read_old_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      oldDirectoryNode = result;
-      context.getObject(oldDirectoryNode.data, check_if_old_file_exists);
-    }
-  }
-
-  find_node(context, oldParentPath, read_old_directory_data);
-}
-
-function unlink_node(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-  var fileNode;
-
-  function update_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      delete directoryData[name];
-      context.putObject(directoryNode.data, directoryData, function(error) {
-        var now = Date.now();
-        update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);
-      });
-    }
-  }
-
-  function delete_file_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.delete(fileNode.data, update_directory_data);
-    }
-  }
-
-  function update_file_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      fileNode.nlinks -= 1;
-      if(fileNode.nlinks < 1) {
-        context.delete(fileNode.id, delete_file_data);
-      } else {
-        context.putObject(fileNode.id, fileNode, function(error) {
-          update_node_times(context, path, fileNode, { ctime: Date.now() }, update_directory_data);
-        });
-      }
-    }
-  }
-
-  function check_if_node_is_directory(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type === NODE_TYPE_DIRECTORY) {
-      callback(new Errors.EPERM('unlink not permitted on directories', name));
-    } else {
-      update_file_node(null, result);
-    }
-  }
-
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(!_(directoryData).has(name)) {
-        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));
-      } else {
-        context.getObject(directoryData[name].id, check_if_node_is_directory);
-      }
-    }
-  }
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-    }
-  }
-
-  find_node(context, parentPath, read_directory_data);
-}
-
-function read_directory(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-
-  var directoryNode;
-  var directoryData;
-
-  function handle_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      var files = Object.keys(directoryData);
-      callback(null, files);
-    }
-  }
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type !== NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOTDIR(null, path));
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, handle_directory_data);
-    }
-  }
-
-  find_node(context, path, read_directory_data);
-}
-
-function make_symbolic_link(context, srcpath, dstpath, callback) {
-  dstpath = normalize(dstpath);
-  var name = basename(dstpath);
-  var parentPath = dirname(dstpath);
-
-  var directoryNode;
-  var directoryData;
-  var fileNode;
-
-  if(ROOT_DIRECTORY_NAME == name) {
-    callback(new Errors.EEXIST(null, name));
-  } else {
-    find_node(context, parentPath, read_directory_data);
-  }
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-    }
-  }
-
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(_(directoryData).has(name)) {
-        callback(new Errors.EEXIST(null, name));
-      } else {
-        write_file_node();
-      }
-    }
-  }
-
-  function write_file_node() {
-    Node.create({
-      guid: context.guid,
-      type: NODE_TYPE_SYMBOLIC_LINK,
-      path: dstpath
-    }, function(error, result) {
-      if(error) {
-        callback(error);
-        return;
-      }
-      fileNode = result;
-      fileNode.nlinks += 1;
-      fileNode.size = srcpath.length;
-      fileNode.data = srcpath;
-      context.putObject(fileNode.id, fileNode, update_directory_data);
-    });
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);
-    }
-  }
-
-  function update_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_SYMBOLIC_LINK);
-      context.putObject(directoryNode.data, directoryData, update_time);
-    }
-  }
-}
-
-function read_link(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  var parentPath = dirname(path);
-
-  var directoryNode;
-  var directoryData;
-
-  find_node(context, parentPath, read_directory_data);
-
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-    }
-  }
-
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(!_(directoryData).has(name)) {
-        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));
-      } else {
-        context.getObject(directoryData[name].id, check_if_symbolic);
-      }
-    }
-  }
-
-  function check_if_symbolic(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      if(result.type != NODE_TYPE_SYMBOLIC_LINK) {
-        callback(new Errors.EINVAL('path not a symbolic link', path));
-      } else {
-        callback(null, result.data);
-      }
-    }
-  }
-}
-
-function truncate_file(context, path, length, callback) {
-  path = normalize(path);
-
-  var fileNode;
-
-  function read_file_data (error, node) {
-    if (error) {
-      callback(error);
-    } else if(node.type == NODE_TYPE_DIRECTORY ) {
-      callback(new Errors.EISDIR(null, path));
-    } else{
-      fileNode = node;
-      context.getBuffer(fileNode.data, truncate_file_data);
-    }
-  }
-
-  function truncate_file_data(error, fileData) {
-    if (error) {
-      callback(error);
-    } else {
-      if(!fileData) {
-        return callback(new Errors.EIO('Expected Buffer'));
-      }
-      var data = new Buffer(length);
-      data.fill(0);
-      if(fileData) {
-        fileData.copy(data);
-      }
-      context.putBuffer(fileNode.data, data, update_file_node);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, path, fileNode, { mtime: now, ctime: now }, callback);
-    }
-  }
-
-  function update_file_node (error) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode.size = length;
-      fileNode.version += 1;
-      context.putObject(fileNode.id, fileNode, update_time);
-    }
-  }
-
-  if(length < 0) {
-    callback(new Errors.EINVAL('length cannot be negative'));
-  } else {
-    find_node(context, path, read_file_data);
-  }
-}
-
-function ftruncate_file(context, ofd, length, callback) {
-  var fileNode;
-
-  function read_file_data (error, node) {
-    if (error) {
-      callback(error);
-    } else if(node.type == NODE_TYPE_DIRECTORY ) {
-      callback(new Errors.EISDIR());
-    } else{
-      fileNode = node;
-      context.getBuffer(fileNode.data, truncate_file_data);
-    }
-  }
-
-  function truncate_file_data(error, fileData) {
-    if (error) {
-      callback(error);
-    } else {
-      var data;
-      if(!fileData) {
-        return callback(new Errors.EIO('Expected Buffer'));
-      }
-      if(fileData) {
-        data = fileData.slice(0, length);
-      } else {
-        data = new Buffer(length);
-        data.fill(0);
-      }
-      context.putBuffer(fileNode.data, data, update_file_node);
-    }
-  }
-
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, callback);
-    }
-  }
-
-  function update_file_node (error) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode.size = length;
-      fileNode.version += 1;
-      context.putObject(fileNode.id, fileNode, update_time);
-    }
-  }
-
-  if(length < 0) {
-    callback(new Errors.EINVAL('length cannot be negative'));
-  } else {
-    ofd.getNode(context, read_file_data);
-  }
-}
-
-function utimes_file(context, path, atime, mtime, callback) {
-  path = normalize(path);
-
-  function update_times(error, node) {
-    if (error) {
-      callback(error);
-    } else {
-      update_node_times(context, path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);
-    }
-  }
-
-  if (typeof atime != 'number' || typeof mtime != 'number') {
-    callback(new Errors.EINVAL('atime and mtime must be number', path));
-  }
-  else if (atime < 0 || mtime < 0) {
-    callback(new Errors.EINVAL('atime and mtime must be positive integers', path));
-  }
-  else {
-    find_node(context, path, update_times);
-  }
-}
-
-function futimes_file(context, ofd, atime, mtime, callback) {
-
-  function update_times (error, node) {
-    if (error) {
-      callback(error);
-    } else {
-      update_node_times(context, ofd.path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);
-    }
-  }
-
-  if (typeof atime != 'number' || typeof mtime != 'number') {
-    callback(new Errors.EINVAL('atime and mtime must be a number'));
-  }
-  else if (atime < 0 || mtime < 0) {
-    callback(new Errors.EINVAL('atime and mtime must be positive integers'));
-  }
-  else {
-    ofd.getNode(context, update_times);
-  }
-}
-
-function setxattr_file(context, path, name, value, flag, callback) {
-  path = normalize(path);
-
-  function setxattr(error, node) {
-    if(error) {
-      return callback(error);
-    }
-    set_extended_attribute(context, path, node, name, value, flag, callback);
-  }
-
-  if (typeof name != 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string', path));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
-  }
-  else if (flag !== null &&
-           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {
-    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE', path));
-  }
-  else {
-    find_node(context, path, setxattr);
-  }
-}
-
-function fsetxattr_file (context, ofd, name, value, flag, callback) {
-  function setxattr(error, node) {
-    if(error) {
-      return callback(error);
-    }
-    set_extended_attribute(context, ofd.path, node, name, value, flag, callback);
-  }
-
-  if (typeof name !== 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string'));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string'));
-  }
-  else if (flag !== null &&
-           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {
-    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE'));
-  }
-  else {
-    ofd.getNode(context, setxattr);
-  }
-}
-
-function getxattr_file (context, path, name, callback) {
-  path = normalize(path);
-
-  function get_xattr(error, node) {
-    if(error) {
-      return callback(error);
-    }
-
-    var xattrs = node.xattrs;
-
-    if (!xattrs.hasOwnProperty(name)) {
-      callback(new Errors.ENOATTR(null, path));
-    }
-    else {
-      callback(null, xattrs[name]);
-    }
-  }
-
-  if (typeof name != 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string', path));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
-  }
-  else {
-    find_node(context, path, get_xattr);
-  }
-}
-
-function fgetxattr_file (context, ofd, name, callback) {
-
-  function get_xattr (error, node) {
-    if (error) {
-      return callback(error);
-    }
-
-    var xattrs = node.xattrs;
-
-    if (!xattrs.hasOwnProperty(name)) {
-      callback(new Errors.ENOATTR());
-    }
-    else {
-      callback(null, xattrs[name]);
-    }
-  }
-
-  if (typeof name != 'string') {
-    callback(new Errors.EINVAL());
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string'));
-  }
-  else {
-    ofd.getNode(context, get_xattr);
-  }
-}
-
-function removexattr_file (context, path, name, callback) {
-  path = normalize(path);
-
-  function remove_xattr (error, node) {
-    if (error) {
-      return callback(error);
-    }
-
-    function update_time(error) {
-      if(error) {
-        callback(error);
-      } else {
-        update_node_times(context, path, node, { ctime: Date.now() }, callback);
-      }
-    }
-
-    var xattrs = node.xattrs;
-
-    if (!xattrs.hasOwnProperty(name)) {
-      callback(new Errors.ENOATTR(null, path));
-    }
-    else {
-      delete xattrs[name];
-      context.putObject(node.id, node, update_time);
-    }
-  }
-
-  if (typeof name !== 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string', path));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
-  }
-  else {
-    find_node(context, path, remove_xattr);
-  }
-}
-
-function fremovexattr_file (context, ofd, name, callback) {
-
-  function remove_xattr (error, node) {
-    if (error) {
-      return callback(error);
-    }
-
-    function update_time(error) {
-      if(error) {
-        callback(error);
-      } else {
-        update_node_times(context, ofd.path, node, { ctime: Date.now() }, callback);
-      }
-    }
-
-    var xattrs = node.xattrs;
-
-    if (!xattrs.hasOwnProperty(name)) {
-      callback(new Errors.ENOATTR());
-    }
-    else {
-      delete xattrs[name];
-      context.putObject(node.id, node, update_time);
-    }
-  }
-
-  if (typeof name != 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string'));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string'));
-  }
-  else {
-    ofd.getNode(context, remove_xattr);
-  }
-}
-
-function validate_flags(flags) {
-  if(!_(O_FLAGS).has(flags)) {
-    return null;
-  }
-  return O_FLAGS[flags];
-}
-
-function validate_file_options(options, enc, fileMode){
-  if(!options) {
-    options = { encoding: enc, flag: fileMode };
-  } else if(typeof options === "function") {
-    options = { encoding: enc, flag: fileMode };
-  } else if(typeof options === "string") {
-    options = { encoding: options, flag: fileMode };
-  }
-  return options;
-}
-
-function pathCheck(path, callback) {
-  var err;
-
-  if(!path) {
-    err = new Errors.EINVAL('Path must be a string', path);
-  } else if(isNullPath(path)) {
-    err = new Errors.EINVAL('Path must be a string without null bytes.', path);
-  } else if(!isAbsolutePath(path)) {
-    err = new Errors.EINVAL('Path must be absolute.', path);
-  }
-
-  if(err) {
-    callback(err);
-    return false;
-  }
-  return true;
-}
-
-
-function open(fs, context, path, flags, mode, callback) {
-  // NOTE: we support the same signature as node with a `mode` arg,
-  // but ignore it.
-  callback = arguments[arguments.length - 1];
-  if(!pathCheck(path, callback)) return;
-
-  function check_result(error, fileNode) {
-    if(error) {
-      callback(error);
-    } else {
-      var position;
-      if(_(flags).contains(O_APPEND)) {
-        position = fileNode.size;
-      } else {
-        position = 0;
-      }
-      var openFileDescription = new OpenFileDescription(path, fileNode.id, flags, position);
-      var fd = fs.allocDescriptor(openFileDescription);
-      callback(null, fd);
-    }
-  }
-
-  flags = validate_flags(flags);
-  if(!flags) {
-    callback(new Errors.EINVAL('flags is not valid'), path);
-  }
-
-  open_file(context, path, flags, check_result);
-}
-
-function close(fs, context, fd, callback) {
-  if(!_(fs.openFiles).has(fd)) {
-    callback(new Errors.EBADF());
-  } else {
-    fs.releaseDescriptor(fd);
-    callback(null);
-  }
-}
-
-function mknod(fs, context, path, type, callback) {
-  if(!pathCheck(path, callback)) return;
-  make_node(context, path, type, callback);
-}
-
-function mkdir(fs, context, path, mode, callback) {
-  // NOTE: we support passing a mode arg, but we ignore it internally for now.
-  callback = arguments[arguments.length - 1];
-  if(!pathCheck(path, callback)) return;
-  make_directory(context, path, callback);
-}
-
-function rmdir(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-  remove_directory(context, path, callback);
-}
-
-function stat(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-
-  function check_result(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      var stats = new Stats(path, result, fs.name);
-      callback(null, stats);
-    }
-  }
-
-  stat_file(context, path, check_result);
-}
-
-function fstat(fs, context, fd, callback) {
-  function check_result(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      var stats = new Stats(fd.path, result, fs.name);
-      callback(null, stats);
-    }
-  }
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else {
-    fstat_file(context, ofd, check_result);
-  }
-}
-
-function link(fs, context, oldpath, newpath, callback) {
-  if(!pathCheck(oldpath, callback)) return;
-  if(!pathCheck(newpath, callback)) return;
-  link_node(context, oldpath, newpath, callback);
-}
-
-function unlink(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-  unlink_node(context, path, callback);
-}
-
-function read(fs, context, fd, buffer, offset, length, position, callback) {
-  // Follow how node.js does this
-  function wrapped_cb(err, bytesRead) {
-    // Retain a reference to buffer so that it can't be GC'ed too soon.
-    callback(err, bytesRead || 0, buffer);
-  }
-
-  offset = (undefined === offset) ? 0 : offset;
-  length = (undefined === length) ? buffer.length - offset : length;
-  callback = arguments[arguments.length - 1];
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_READ)) {
-    callback(new Errors.EBADF('descriptor does not permit reading'));
-  } else {
-    read_data(context, ofd, buffer, offset, length, position, wrapped_cb);
-  }
-}
-
-function readFile(fs, context, path, options, callback) {
-  callback = arguments[arguments.length - 1];
-  options = validate_file_options(options, null, 'r');
-
-  if(!pathCheck(path, callback)) return;
-
-  var flags = validate_flags(options.flag || 'r');
-  if(!flags) {
-    return callback(new Errors.EINVAL('flags is not valid', path));
-  }
-
-  open_file(context, path, flags, function(err, fileNode) {
-    if(err) {
-      return callback(err);
-    }
-    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);
-    var fd = fs.allocDescriptor(ofd);
-
-    function cleanup() {
-      fs.releaseDescriptor(fd);
-    }
-
-    fstat_file(context, ofd, function(err, fstatResult) {
-      if(err) {
-        cleanup();
-        return callback(err);
-      }
-
-      var stats = new Stats(ofd.path, fstatResult, fs.name);
-
-      if(stats.isDirectory()) {
-        cleanup();
-        return callback(new Errors.EISDIR('illegal operation on directory', path));
-      }
-
-      var size = stats.size;
-      var buffer = new Buffer(size);
-      buffer.fill(0);
-
-      read_data(context, ofd, buffer, 0, size, 0, function(err, nbytes) {
-        cleanup();
-
-        if(err) {
-          return callback(err);
-        }
-
-        var data;
-        if(options.encoding === 'utf8') {
-          data = Encoding.decode(buffer);
-        } else {
-          data = buffer;
-        }
-        callback(null, data);
-      });
-    });
-  });
-}
-
-function write(fs, context, fd, buffer, offset, length, position, callback) {
-  callback = arguments[arguments.length - 1];
-  offset = (undefined === offset) ? 0 : offset;
-  length = (undefined === length) ? buffer.length - offset : length;
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  } else if(buffer.length - offset < length) {
-    callback(new Errors.EIO('intput buffer is too small'));
-  } else {
-    write_data(context, ofd, buffer, offset, length, position, callback);
-  }
-}
-
-function writeFile(fs, context, path, data, options, callback) {
-  callback = arguments[arguments.length - 1];
-  options = validate_file_options(options, 'utf8', 'w');
-
-  if(!pathCheck(path, callback)) return;
-
-  var flags = validate_flags(options.flag || 'w');
-  if(!flags) {
-    return callback(new Errors.EINVAL('flags is not valid', path));
-  }
-
-  data = data || '';
-  if(typeof data === "number") {
-    data = '' + data;
-  }
-  if(typeof data === "string" && options.encoding === 'utf8') {
-    data = Encoding.encode(data);
-  }
-
-  open_file(context, path, flags, function(err, fileNode) {
-    if(err) {
-      return callback(err);
-    }
-    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);
-    var fd = fs.allocDescriptor(ofd);
-
-    replace_data(context, ofd, data, 0, data.length, function(err, nbytes) {
-      fs.releaseDescriptor(fd);
-
-      if(err) {
-        return callback(err);
-      }
-      callback(null);
-    });
-  });
-}
-
-function appendFile(fs, context, path, data, options, callback) {
-  callback = arguments[arguments.length - 1];
-  options = validate_file_options(options, 'utf8', 'a');
-
-  if(!pathCheck(path, callback)) return;
-
-  var flags = validate_flags(options.flag || 'a');
-  if(!flags) {
-    return callback(new Errors.EINVAL('flags is not valid', path));
-  }
-
-  data = data || '';
-  if(typeof data === "number") {
-    data = '' + data;
-  }
-  if(typeof data === "string" && options.encoding === 'utf8') {
-    data = Encoding.encode(data);
-  }
-
-  open_file(context, path, flags, function(err, fileNode) {
-    if(err) {
-      return callback(err);
-    }
-    var ofd = new OpenFileDescription(path, fileNode.id, flags, fileNode.size);
-    var fd = fs.allocDescriptor(ofd);
-
-    write_data(context, ofd, data, 0, data.length, ofd.position, function(err, nbytes) {
-      fs.releaseDescriptor(fd);
-
-      if(err) {
-        return callback(err);
-      }
-      callback(null);
-    });
-  });
-}
-
-function exists(fs, context, path, callback) {
-  function cb(err, stats) {
-    callback(err ? false : true);
-  }
-  stat(fs, context, path, cb);
-}
-
-function getxattr(fs, context, path, name, callback) {
-  if (!pathCheck(path, callback)) return;
-  getxattr_file(context, path, name, callback);
-}
-
-function fgetxattr(fs, context, fd, name, callback) {
-  var ofd = fs.openFiles[fd];
-  if (!ofd) {
-    callback(new Errors.EBADF());
-  }
-  else {
-    fgetxattr_file(context, ofd, name, callback);
-  }
-}
-
-function setxattr(fs, context, path, name, value, flag, callback) {
-  if(typeof flag === 'function') {
-    callback = flag;
-    flag = null;
-  }
-
-  if (!pathCheck(path, callback)) return;
-  setxattr_file(context, path, name, value, flag, callback);
-}
-
-function fsetxattr(fs, context, fd, name, value, flag, callback) {
-  if(typeof flag === 'function') {
-    callback = flag;
-    flag = null;
-  }
-
-  var ofd = fs.openFiles[fd];
-  if (!ofd) {
-    callback(new Errors.EBADF());
-  }
-  else if (!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  }
-  else {
-    fsetxattr_file(context, ofd, name, value, flag, callback);
-  }
-}
-
-function removexattr(fs, context, path, name, callback) {
-  if (!pathCheck(path, callback)) return;
-  removexattr_file(context, path, name, callback);
-}
-
-function fremovexattr(fs, context, fd, name, callback) {
-  var ofd = fs.openFiles[fd];
-  if (!ofd) {
-    callback(new Errors.EBADF());
-  }
-  else if (!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  }
-  else {
-    fremovexattr_file(context, ofd, name, callback);
-  }
-}
-
-function lseek(fs, context, fd, offset, whence, callback) {
-  function update_descriptor_position(error, stats) {
-    if(error) {
-      callback(error);
-    } else {
-      if(stats.size + offset < 0) {
-        callback(new Errors.EINVAL('resulting file offset would be negative'));
-      } else {
-        ofd.position = stats.size + offset;
-        callback(null, ofd.position);
-      }
-    }
-  }
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  }
-
-  if('SET' === whence) {
-    if(offset < 0) {
-      callback(new Errors.EINVAL('resulting file offset would be negative'));
-    } else {
-      ofd.position = offset;
-      callback(null, ofd.position);
-    }
-  } else if('CUR' === whence) {
-    if(ofd.position + offset < 0) {
-      callback(new Errors.EINVAL('resulting file offset would be negative'));
-    } else {
-      ofd.position += offset;
-      callback(null, ofd.position);
-    }
-  } else if('END' === whence) {
-    fstat_file(context, ofd, update_descriptor_position);
-  } else {
-    callback(new Errors.EINVAL('whence argument is not a proper value'));
-  }
-}
-
-function readdir(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-  read_directory(context, path, callback);
-}
-
-function utimes(fs, context, path, atime, mtime, callback) {
-  if(!pathCheck(path, callback)) return;
-
-  var currentTime = Date.now();
-  atime = (atime) ? atime : currentTime;
-  mtime = (mtime) ? mtime : currentTime;
-
-  utimes_file(context, path, atime, mtime, callback);
-}
-
-function futimes(fs, context, fd, atime, mtime, callback) {
-  var currentTime = Date.now();
-  atime = (atime) ? atime : currentTime;
-  mtime = (mtime) ? mtime : currentTime;
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  } else {
-    futimes_file(context, ofd, atime, mtime, callback);
-  }
-}
-
-function rename(fs, context, oldpath, newpath, callback) {
-  if(!pathCheck(oldpath, callback)) return;
-  if(!pathCheck(newpath, callback)) return;
-
-  oldpath = normalize(oldpath);
-  newpath = normalize(newpath);
-
-  var oldParentPath = Path.dirname(oldpath);
-  var newParentPath = Path.dirname(oldpath);
-  var oldName = Path.basename(oldpath);
-  var newName = Path.basename(newpath);
-  var oldParentDirectory, oldParentData;
-  var newParentDirectory, newParentData;
-  var ctime = Date.now();
-  var fileNode;
-
-  function update_times(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);
-    }
-  }
-
-  function read_new_directory(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.getObject(newParentData[newName].id, update_times);
-    }
-  }
-
-  function update_old_parent_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      if(oldParentDirectory.id === newParentDirectory.id) {
-        oldParentData = newParentData;
-      }
-      delete oldParentData[oldName];
-      context.putObject(oldParentDirectory.data, oldParentData, read_new_directory);
-    }
-  }
-
-  function update_new_parent_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      newParentData[newName] = oldParentData[oldName];
-      context.putObject(newParentDirectory.data, newParentData, update_old_parent_directory_data);
-    }
-  }
-
-  function check_if_new_directory_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newParentData = result;
-      if(_(newParentData).has(newName)) {
-        remove_directory(context, newpath, update_new_parent_directory_data);
-      } else {
-        update_new_parent_directory_data();
-      }
-    }
-  }
-
-  function read_new_parent_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newParentDirectory = result;
-      context.getObject(newParentDirectory.data, check_if_new_directory_exists);
-    }
-  }
-
-  function get_new_parent_directory(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      oldParentData = result;
-      find_node(context, newParentPath, read_new_parent_directory_data);
-    }
-  }
-
-  function read_parent_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      oldParentDirectory = result;
-      context.getObject(result.data, get_new_parent_directory);
-    }
-  }
-
-  function unlink_old_file(error) {
-    if(error) {
-      callback(error);
-    } else {
-      unlink_node(context, oldpath, callback);
-    }
-  }
-
-  function check_node_type(error, node) {
-    if(error) {
-      callback(error);
-    } else if(node.type === NODE_TYPE_DIRECTORY) {
-      find_node(context, oldParentPath, read_parent_directory_data);
-    } else {
-      link_node(context, oldpath, newpath, unlink_old_file);
-    }
-  }
-
-  find_node(context, oldpath, check_node_type);
-}
-
-function symlink(fs, context, srcpath, dstpath, type, callback) {
-  // NOTE: we support passing the `type` arg, but ignore it.
-  callback = arguments[arguments.length - 1];
-  if(!pathCheck(srcpath, callback)) return;
-  if(!pathCheck(dstpath, callback)) return;
-  make_symbolic_link(context, srcpath, dstpath, callback);
-}
-
-function readlink(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-  read_link(context, path, callback);
-}
-
-function lstat(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-
-  function check_result(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      var stats = new Stats(path, result, fs.name);
-      callback(null, stats);
-    }
-  }
-
-  lstat_file(context, path, check_result);
-}
-
-function truncate(fs, context, path, length, callback) {
-  // NOTE: length is optional
-  callback = arguments[arguments.length - 1];
-  length = length || 0;
-
-  if(!pathCheck(path, callback)) return;
-  truncate_file(context, path, length, callback);
-}
-
-function ftruncate(fs, context, fd, length, callback) {
-  // NOTE: length is optional
-  callback = arguments[arguments.length - 1];
-  length = length || 0;
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  } else {
-    ftruncate_file(context, ofd, length, callback);
-  }
-}
-
-module.exports = {
-  ensureRootDirectory: ensure_root_directory,
-  open: open,
-  close: close,
-  mknod: mknod,
-  mkdir: mkdir,
-  rmdir: rmdir,
-  unlink: unlink,
-  stat: stat,
-  fstat: fstat,
-  link: link,
-  read: read,
-  readFile: readFile,
-  write: write,
-  writeFile: writeFile,
-  appendFile: appendFile,
-  exists: exists,
-  getxattr: getxattr,
-  fgetxattr: fgetxattr,
-  setxattr: setxattr,
-  fsetxattr: fsetxattr,
-  removexattr: removexattr,
-  fremovexattr: fremovexattr,
-  lseek: lseek,
-  readdir: readdir,
-  utimes: utimes,
-  futimes: futimes,
-  rename: rename,
-  symlink: symlink,
-  readlink: readlink,
-  lstat: lstat,
-  truncate: truncate,
-  ftruncate: ftruncate
-};
-
-},{"../../lib/nodash.js":4,"../buffer.js":51,"../constants.js":52,"../directory-entry.js":53,"../encoding.js":54,"../errors.js":55,"../node.js":60,"../open-file-description.js":61,"../path.js":62,"../stats.js":70,"../super-node.js":71}],57:[function(require,module,exports){
-var _ = require('../../lib/nodash.js');
-
-var isNullPath = require('../path.js').isNull;
-var nop = require('../shared.js').nop;
-
-var Constants = require('../constants.js');
-var FILE_SYSTEM_NAME = Constants.FILE_SYSTEM_NAME;
-var FS_FORMAT = Constants.FS_FORMAT;
-var FS_READY = Constants.FS_READY;
-var FS_PENDING = Constants.FS_PENDING;
-var FS_ERROR = Constants.FS_ERROR;
-var FS_NODUPEIDCHECK = Constants.FS_NODUPEIDCHECK;
-
-var providers = require('../providers/index.js');
-
-var Shell = require('../shell/shell.js');
-var Intercom = require('../../lib/intercom.js');
-var FSWatcher = require('../fs-watcher.js');
-var Errors = require('../errors.js');
-var defaultGuidFn = require('../shared.js').guid;
-
-var STDIN = Constants.STDIN;
-var STDOUT = Constants.STDOUT;
-var STDERR = Constants.STDERR;
-var FIRST_DESCRIPTOR = Constants.FIRST_DESCRIPTOR;
-
-// The core fs operations live on impl
-var impl = require('./implementation.js');
-
-// node.js supports a calling pattern that leaves off a callback.
-function maybeCallback(callback) {
-  if(typeof callback === "function") {
-    return callback;
-  }
-  return function(err) {
-    if(err) {
-      throw err;
-    }
-  };
-}
-
-// Default callback that logs an error if passed in
-function defaultCallback(err) {
-  if(err) {
-    console.error('Filer error: ', err);
-  }
-}
-
-/**
- * FileSystem
- *
- * A FileSystem takes an `options` object, which can specify a number of,
- * options.  All options are optional, and include:
- *
- * name: the name of the file system, defaults to "local"
- *
- * flags: one or more flags to use when creating/opening the file system.
- *        For example: "FORMAT" will cause the file system to be formatted.
- *        No explicit flags are set by default.
- *
- * provider: an explicit storage provider to use for the file
- *           system's database context provider.  A number of context
- *           providers are included (see /src/providers), and users
- *           can write one of their own and pass it in to be used.
- *           By default an IndexedDB provider is used.
- *
- * guid: a function for generating unique IDs for nodes in the filesystem.
- *       Use this to override the built-in UUID generation. (Used mainly for tests).
- *
- * callback: a callback function to be executed when the file system becomes
- *           ready for use. Depending on the context provider used, this might
- *           be right away, or could take some time. The callback should expect
- *           an `error` argument, which will be null if everything worked.  Also
- *           users should check the file system's `readyState` and `error`
- *           properties to make sure it is usable.
- */
-function FileSystem(options, callback) {
-  options = options || {};
-  callback = callback || defaultCallback;
-
-  var flags = options.flags;
-  var guid = options.guid ? options.guid : defaultGuidFn;
-  var provider = options.provider || new providers.Default(options.name || FILE_SYSTEM_NAME);
-  // If we're given a provider, match its name unless we get an explicit name
-  var name = options.name || provider.name;
-  var forceFormatting = _(flags).contains(FS_FORMAT);
-
-  var fs = this;
-  fs.readyState = FS_PENDING;
-  fs.name = name;
-  fs.error = null;
-
-  fs.stdin = STDIN;
-  fs.stdout = STDOUT;
-  fs.stderr = STDERR;
-
-  // Expose Shell constructor
-  this.Shell = Shell.bind(undefined, this);
-
-  // Safely expose the list of open files and file
-  // descriptor management functions
-  var openFiles = {};
-  var nextDescriptor = FIRST_DESCRIPTOR;
-  Object.defineProperty(this, "openFiles", {
-    get: function() { return openFiles; }
-  });
-  this.allocDescriptor = function(openFileDescription) {
-    var fd = nextDescriptor ++;
-    openFiles[fd] = openFileDescription;
-    return fd;
-  };
-  this.releaseDescriptor = function(fd) {
-    delete openFiles[fd];
-  };
-
-  // Safely expose the operation queue
-  var queue = [];
-  this.queueOrRun = function(operation) {
-    var error;
-
-    if(FS_READY == fs.readyState) {
-      operation.call(fs);
-    } else if(FS_ERROR == fs.readyState) {
-      error = new Errors.EFILESYSTEMERROR('unknown error');
-    } else {
-      queue.push(operation);
-    }
-
-    return error;
-  };
-  function runQueued() {
-    queue.forEach(function(operation) {
-      operation.call(this);
-    }.bind(fs));
-    queue = null;
-  }
-
-  // We support the optional `options` arg from node, but ignore it
-  this.watch = function(filename, options, listener) {
-    if(isNullPath(filename)) {
-      throw new Error('Path must be a string without null bytes.');
-    }
-    if(typeof options === 'function') {
-      listener = options;
-      options = {};
-    }
-    options = options || {};
-    listener = listener || nop;
-
-    var watcher = new FSWatcher();
-    watcher.start(filename, false, options.recursive);
-    watcher.on('change', listener);
-
-    return watcher;
-  };
-
-  // Deal with various approaches to node ID creation
-  function wrappedGuidFn(context) {
-    return function(callback) {
-      // Skip the duplicate ID check if asked to
-      if(_(flags).contains(FS_NODUPEIDCHECK)) {
-        callback(null, guid());
-        return;
-      }
-
-      // Otherwise (default) make sure this id is unused first
-      function guidWithCheck(callback) {
-        var id = guid();
-        context.getObject(id, function(err, value) {
-          if(err) {
-            callback(err);
-            return;
-          }
-
-          // If this id is unused, use it, otherwise find another
-          if(!value) {
-            callback(null, id);
-          } else {
-            guidWithCheck(callback);
-          }
-        });
-      }
-      guidWithCheck(callback);
-    };
-  }
-
-  // Let other instances (in this or other windows) know about
-  // any changes to this fs instance.
-  function broadcastChanges(changes) {
-    if(!changes.length) {
-      return;
-    }
-    var intercom = Intercom.getInstance();
-    changes.forEach(function(change) {
-      intercom.emit(change.event, change.path);
-    });
-  }
-
-  // Open file system storage provider
-  provider.open(function(err) {
-    function complete(error) {
-      function wrappedContext(methodName) {
-        var context = provider[methodName]();
-        context.flags = flags;
-        context.changes = [];
-        context.guid = wrappedGuidFn(context);
-
-        // When the context is finished, let the fs deal with any change events
-        context.close = function() {
-          var changes = context.changes;
-          broadcastChanges(changes);
-          changes.length = 0;
-        };
-
-        return context;
-      }
-
-      // Wrap the provider so we can extend the context with fs flags and
-      // an array of changes (e.g., watch event 'change' and 'rename' events
-      // for paths updated during the lifetime of the context). From this
-      // point forward we won't call open again, so it's safe to drop it.
-      fs.provider = {
-        openReadWriteContext: function() {
-          return wrappedContext('getReadWriteContext');
-        },
-        openReadOnlyContext: function() {
-          return wrappedContext('getReadOnlyContext');
-        }
-      };
-
-      if(error) {
-        fs.readyState = FS_ERROR;
-      } else {
-        fs.readyState = FS_READY;
-      }
-      runQueued();
-      callback(error, fs);
-    }
-
-    if(err) {
-      return complete(err);
-    }
-
-    var context = provider.getReadWriteContext();
-    context.guid = wrappedGuidFn(context);
-
-    // Mount the filesystem, formatting if necessary
-    if(forceFormatting) {
-      // Wipe the storage provider, then write root block
-      context.clear(function(err) {
-        if(err) {
-          return complete(err);
-        }
-        impl.ensureRootDirectory(context, complete);
-      });
-    } else {
-      // Use existing (or create new) root and mount
-      impl.ensureRootDirectory(context, complete);
-    }
-  });
-}
-
-// Expose storage providers on FileSystem constructor
-FileSystem.providers = providers;
-
-/**
- * Public API for FileSystem
- */
-[
-  'open',
-  'close',
-  'mknod',
-  'mkdir',
-  'rmdir',
-  'stat',
-  'fstat',
-  'link',
-  'unlink',
-  'read',
-  'readFile',
-  'write',
-  'writeFile',
-  'appendFile',
-  'exists',
-  'lseek',
-  'readdir',
-  'rename',
-  'readlink',
-  'symlink',
-  'lstat',
-  'truncate',
-  'ftruncate',
-  'utimes',
-  'futimes',
-  'setxattr',
-  'getxattr',
-  'fsetxattr',
-  'fgetxattr',
-  'removexattr',
-  'fremovexattr'
-].forEach(function(methodName) {
-  FileSystem.prototype[methodName] = function() {
-    var fs = this;
-    var args = Array.prototype.slice.call(arguments, 0);
-    var lastArgIndex = args.length - 1;
-
-    // We may or may not get a callback, and since node.js supports
-    // fire-and-forget style fs operations, we have to dance a bit here.
-    var missingCallback = typeof args[lastArgIndex] !== 'function';
-    var callback = maybeCallback(args[lastArgIndex]);
-
-    var error = fs.queueOrRun(function() {
-      var context = fs.provider.openReadWriteContext();
-
-      // Fail early if the filesystem is in an error state (e.g.,
-      // provider failed to open.
-      if(FS_ERROR === fs.readyState) {
-        var err = new Errors.EFILESYSTEMERROR('filesystem unavailable, operation canceled');
-        return callback.call(fs, err);
-      }
-
-      // Wrap the callback so we can explicitly close the context
-      function complete() {
-        context.close();
-        callback.apply(fs, arguments);
-      }
-
-      // Either add or replace the callback with our wrapper complete()
-      if(missingCallback) {
-        args.push(complete);
-      } else {
-        args[lastArgIndex] = complete;
-      }
-
-      // Forward this call to the impl's version, using the following
-      // call signature, with complete() as the callback/last-arg now:
-      // fn(fs, context, arg0, arg1, ... , complete);
-      var fnArgs = [fs, context].concat(args);
-      impl[methodName].apply(null, fnArgs);
-    });
-    if(error) {
-      callback(error);
-    }
-  };
-});
-
-module.exports = FileSystem;
-
-},{"../../lib/intercom.js":3,"../../lib/nodash.js":4,"../constants.js":52,"../errors.js":55,"../fs-watcher.js":58,"../path.js":62,"../providers/index.js":63,"../shared.js":67,"../shell/shell.js":69,"./implementation.js":56}],58:[function(require,module,exports){
-var EventEmitter = require('../lib/eventemitter.js');
-var Path = require('./path.js');
-var Intercom = require('../lib/intercom.js');
-
-/**
- * FSWatcher based on node.js' FSWatcher
- * see https://github.com/joyent/node/blob/master/lib/fs.js
- */
-function FSWatcher() {
-  EventEmitter.call(this);
-  var self = this;
-  var recursive = false;
-  var recursivePathPrefix;
-  var filename;
-
-  function onchange(path) {
-    // Watch for exact filename, or parent path when recursive is true.
-    if(filename === path || (recursive && path.indexOf(recursivePathPrefix) === 0)) {
-      self.trigger('change', 'change', path);
-    }
-  }
-
-  // We support, but ignore the second arg, which node.js uses.
-  self.start = function(filename_, persistent_, recursive_) {
-    // Bail if we've already started (and therefore have a filename);
-    if(filename) {
-      return;
-    }
-
-    if(Path.isNull(filename_)) {
-      throw new Error('Path must be a string without null bytes.');
-    }
-
-    // TODO: get realpath for symlinks on filename...
-
-    // Filer's Path.normalize strips trailing slashes, which we use here.
-    // See https://github.com/js-platform/filer/issues/105
-    filename = Path.normalize(filename_);
-
-    // Whether to watch beneath this path or not
-    recursive = recursive_ === true;
-    // If recursive, construct a path prefix portion for comparisons later
-    // (i.e., '/path' becomes '/path/' so we can search within a filename for the
-    // prefix). We also take care to allow for '/' on its own.
-    if(recursive) {
-      recursivePathPrefix = filename === '/' ? '/' : filename + '/';
-    }
-
-    var intercom = Intercom.getInstance();
-    intercom.on('change', onchange);
-  };
-
-  self.close = function() {
-    var intercom = Intercom.getInstance();
-    intercom.off('change', onchange);
-    self.removeAllListeners('change');
-  };
-}
-FSWatcher.prototype = new EventEmitter();
-FSWatcher.prototype.constructor = FSWatcher;
-
-module.exports = FSWatcher;
-
-},{"../lib/eventemitter.js":2,"../lib/intercom.js":3,"./path.js":62}],59:[function(require,module,exports){
-module.exports = {
-  FileSystem: require('./filesystem/interface.js'),
-  Buffer: require('./buffer.js'),
-  Path: require('./path.js'),
-  Errors: require('./errors.js'),
-  Shell: require('./shell/shell.js')
-};
-
-},{"./buffer.js":51,"./errors.js":55,"./filesystem/interface.js":57,"./path.js":62,"./shell/shell.js":69}],60:[function(require,module,exports){
-var path = require('./path.js');
-var hash32 = require('./encoding.js').hash32;
-
-var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;
-var NODE_TYPE_DIRECTORY = require('./constants.js').NODE_TYPE_DIRECTORY;
-var NODE_TYPE_SYMBOLIC_LINK = require('./constants.js').NODE_TYPE_SYMBOLIC_LINK;
-var NODE_TYPE_META = require('./constants.js').NODE_TYPE_META;
-
-var ROOT_DIRECTORY_NAME = require('./constants.js').ROOT_DIRECTORY_NAME;
-
-var S_IFREG = require('./constants.js').S_IFREG;
-var S_IFDIR = require('./constants.js').S_IFDIR;
-var S_IFLNK = require('./constants.js').S_IFLNK;
-
-var DEFAULT_FILE_PERMISSIONS = require('./constants.js').DEFAULT_FILE_PERMISSIONS;
-var DEFAULT_DIR_PERMISSIONS = require('./constants.js').DEFAULT_DIR_PERMISSIONS;
-
-function getMode(type) {
-  switch(type) {
-    case NODE_TYPE_DIRECTORY:
-      return DEFAULT_DIR_PERMISSIONS | S_IFDIR;
-    case NODE_TYPE_SYMBOLIC_LINK:
-      return DEFAULT_FILE_PERMISSIONS | S_IFLNK;
-    /* jshint -W086 */
-    case NODE_TYPE_FILE:
-      // falls through
-    default:
-      return DEFAULT_FILE_PERMISSIONS | S_IFREG;
-  }
-}
-
-function Node(options) {
-  var now = Date.now();
-
-  this.id = options.id;
-  this.type = options.type || NODE_TYPE_FILE;  // node type (file, directory, etc)
-  this.size = options.size || 0; // size (bytes for files, entries for directories)
-  this.atime = options.atime || now; // access time (will mirror ctime after creation)
-  this.ctime = options.ctime || now; // creation/change time
-  this.mtime = options.mtime || now; // modified time
-  this.flags = options.flags || []; // file flags
-  this.xattrs = options.xattrs || {}; // extended attributes
-  this.nlinks = options.nlinks || 0; // links count
-  this.data = options.data; // id for data object
-  this.version = options.version || 1;
-
-  // permissions and flags
-  this.mode = options.mode || (getMode(this.type));
-  this.uid = options.uid || 0x0; // owner name
-  this.gid = options.gid || 0x0; // group name
-}
-
-// Make sure the options object has an id on property,
-// either from caller or one we generate using supplied guid fn.
-function ensureID(options, prop, callback) {
-  if(options[prop]) {
-    callback(null);
-  } else {
-    options.guid(function(err, id) {
-      options[prop] = id;
-      callback(err);
-    });
-  }
-}
-
-Node.create = function(options, callback) {
-  // We expect both options.id and options.data to be provided/generated.
-  ensureID(options, 'id', function(err) {
-    if(err) {
-      callback(err);
-      return;
-    }
-
-    ensureID(options, 'data', function(err) {
-      if(err) {
-        callback(err);
-        return;
-      }
-
-      callback(null, new Node(options));
-    });
-  });
-};
-
-module.exports = Node;
-
-},{"./constants.js":52,"./encoding.js":54,"./path.js":62}],61:[function(require,module,exports){
-var Errors = require('./errors.js');
-
-function OpenFileDescription(path, id, flags, position) {
-  this.path = path;
-  this.id = id;
-  this.flags = flags;
-  this.position = position;
-}
-
-// Tries to find the node associated with an ofd's `id`.
-// If not found, an error is returned on the callback.
-OpenFileDescription.prototype.getNode = function(context, callback) {
-  var id = this.id;
-  var path = this.path;
-
-  function check_if_node_exists(error, node) {
-    if(error) {
-      return callback(error);
-    }
-
-    if(!node) {
-      return callback(new Errors.EBADF('file descriptor refers to unknown node', path));
-    }
-
-    callback(null, node);
-  }
-
-  context.getObject(id, check_if_node_exists);
-};
-
-module.exports = OpenFileDescription;
-
-},{"./errors.js":55}],62:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-// Based on https://github.com/joyent/node/blob/41e53e557992a7d552a8e23de035f9463da25c99/lib/path.js
-
-// resolves . and .. elements in a path array with directory names there
-// must be no slashes, empty elements, or device names (c:\) in the array
-// (so also no leading and trailing slashes - it does not distinguish
-// relative and absolute paths)
-function normalizeArray(parts, allowAboveRoot) {
-  // if the path tries to go above the root, `up` ends up > 0
-  var up = 0;
-  for (var i = parts.length - 1; i >= 0; i--) {
-    var last = parts[i];
-    if (last === '.') {
-      parts.splice(i, 1);
-    } else if (last === '..') {
-      parts.splice(i, 1);
-      up++;
-    } else if (up) {
-      parts.splice(i, 1);
-      up--;
-    }
-  }
-
-  // if the path is allowed to go above the root, restore leading ..s
-  if (allowAboveRoot) {
-    for (; up--; up) {
-      parts.unshift('..');
-    }
-  }
-
-  return parts;
-}
-
-// Split a filename into [root, dir, basename, ext], unix version
-// 'root' is just a slash, or nothing.
-var splitPathRe =
-      /^(\/?)([\s\S]+\/(?!$)|\/)?((?:\.{1,2}$|[\s\S]+?)?(\.[^.\/]*)?)$/;
-var splitPath = function(filename) {
-  var result = splitPathRe.exec(filename);
-  return [result[1] || '', result[2] || '', result[3] || '', result[4] || ''];
-};
-
-// path.resolve([from ...], to)
-function resolve() {
-  var resolvedPath = '',
-      resolvedAbsolute = false;
-
-  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
-    // XXXfiler: we don't have process.cwd() so we use '/' as a fallback
-    var path = (i >= 0) ? arguments[i] : '/';
-
-    // Skip empty and invalid entries
-    if (typeof path !== 'string' || !path) {
-      continue;
-    }
-
-    resolvedPath = path + '/' + resolvedPath;
-    resolvedAbsolute = path.charAt(0) === '/';
-  }
-
-  // At this point the path should be resolved to a full absolute path, but
-  // handle relative paths to be safe (might happen when process.cwd() fails)
-
-  // Normalize the path
-  resolvedPath = normalizeArray(resolvedPath.split('/').filter(function(p) {
-    return !!p;
-  }), !resolvedAbsolute).join('/');
-
-  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
-}
-
-// path.normalize(path)
-function normalize(path) {
-  var isAbsolute = path.charAt(0) === '/',
-      trailingSlash = path.substr(-1) === '/';
-
-  // Normalize the path
-  path = normalizeArray(path.split('/').filter(function(p) {
-    return !!p;
-  }), !isAbsolute).join('/');
-
-  if (!path && !isAbsolute) {
-    path = '.';
-  }
-  /*
-   if (path && trailingSlash) {
-   path += '/';
-   }
-   */
-
-  return (isAbsolute ? '/' : '') + path;
-}
-
-function join() {
-  var paths = Array.prototype.slice.call(arguments, 0);
-  return normalize(paths.filter(function(p, index) {
-    return p && typeof p === 'string';
-  }).join('/'));
-}
-
-// path.relative(from, to)
-function relative(from, to) {
-  from = resolve(from).substr(1);
-  to = resolve(to).substr(1);
-
-  function trim(arr) {
-    var start = 0;
-    for (; start < arr.length; start++) {
-      if (arr[start] !== '') break;
-    }
-
-    var end = arr.length - 1;
-    for (; end >= 0; end--) {
-      if (arr[end] !== '') break;
-    }
-
-    if (start > end) return [];
-    return arr.slice(start, end - start + 1);
-  }
-
-  var fromParts = trim(from.split('/'));
-  var toParts = trim(to.split('/'));
-
-  var length = Math.min(fromParts.length, toParts.length);
-  var samePartsLength = length;
-  for (var i = 0; i < length; i++) {
-    if (fromParts[i] !== toParts[i]) {
-      samePartsLength = i;
-      break;
-    }
-  }
-
-  var outputParts = [];
-  for (var i = samePartsLength; i < fromParts.length; i++) {
-    outputParts.push('..');
-  }
-
-  outputParts = outputParts.concat(toParts.slice(samePartsLength));
-
-  return outputParts.join('/');
-}
-
-function dirname(path) {
-  var result = splitPath(path),
-      root = result[0],
-      dir = result[1];
-
-  if (!root && !dir) {
-    // No dirname whatsoever
-    return '.';
-  }
-
-  if (dir) {
-    // It has a dirname, strip trailing slash
-    dir = dir.substr(0, dir.length - 1);
-  }
-
-  return root + dir;
-}
-
-function basename(path, ext) {
-  var f = splitPath(path)[2];
-  // TODO: make this comparison case-insensitive on windows?
-  if (ext && f.substr(-1 * ext.length) === ext) {
-    f = f.substr(0, f.length - ext.length);
-  }
-  // XXXfiler: node.js just does `return f`
-  return f === "" ? "/" : f;
-}
-
-function extname(path) {
-  return splitPath(path)[3];
-}
-
-function isAbsolute(path) {
-  if(path.charAt(0) === '/') {
-    return true;
-  }
-  return false;
-}
-
-function isNull(path) {
-  if (('' + path).indexOf('\u0000') !== -1) {
-    return true;
-  }
-  return false;
-}
-
-// Make sure we don't double-add a trailing slash (e.g., '/' -> '//')
-function addTrailing(path) {
-  return path.replace(/\/*$/, '/');
-}
-
-// Deal with multiple slashes at the end, one, or none
-// and make sure we don't return the empty string.
-function removeTrailing(path) {
-  path = path.replace(/\/*$/, '');
-  return path === '' ? '/' : path;
-}
-
-// XXXfiler: we don't support path.exists() or path.existsSync(), which
-// are deprecated, and need a FileSystem instance to work. Use fs.stat().
-
-module.exports = {
-  normalize: normalize,
-  resolve: resolve,
-  join: join,
-  relative: relative,
-  sep: '/',
-  delimiter: ':',
-  dirname: dirname,
-  basename: basename,
-  extname: extname,
-  isAbsolute: isAbsolute,
-  isNull: isNull,
-  // Non-node but useful...
-  addTrailing: addTrailing,
-  removeTrailing: removeTrailing
-};
-
-},{}],63:[function(require,module,exports){
-var IndexedDB = require('./indexeddb.js');
-var WebSQL = require('./websql.js');
-var Memory = require('./memory.js');
-
-module.exports = {
-  IndexedDB: IndexedDB,
-  WebSQL: WebSQL,
-  Memory: Memory,
-
-  /**
-   * Convenience Provider references
-   */
-
-  // The default provider to use when none is specified
-  Default: IndexedDB,
-
-  // The Fallback provider does automatic fallback checks
-  Fallback: (function() {
-    if(IndexedDB.isSupported()) {
-      return IndexedDB;
-    }
-
-    if(WebSQL.isSupported()) {
-      return WebSQL;
-    }
-
-    function NotSupported() {
-      throw "[Filer Error] Your browser doesn't support IndexedDB or WebSQL.";
-    }
-    NotSupported.isSupported = function() {
-      return false;
-    };
-    return NotSupported;
-  }())
-};
-
-},{"./indexeddb.js":64,"./memory.js":65,"./websql.js":66}],64:[function(require,module,exports){
-(function (global,Buffer){
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-var FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;
-var IDB_RW = require('../constants.js').IDB_RW;
-var IDB_RO = require('../constants.js').IDB_RO;
-var Errors = require('../errors.js');
-var FilerBuffer = require('../buffer.js');
-
-var indexedDB = global.indexedDB       ||
-                global.mozIndexedDB    ||
-                global.webkitIndexedDB ||
-                global.msIndexedDB;
-
-function IndexedDBContext(db, mode) {
-  this.db = db;
-  this.mode = mode;
-}
-
-IndexedDBContext.prototype._getObjectStore = function() {
-  if(this.objectStore) {
-    return this.objectStore;
-  }
-
-  var transaction = this.db.transaction(FILE_STORE_NAME, this.mode);
-  this.objectStore = transaction.objectStore(FILE_STORE_NAME);
-  return this.objectStore;
-};
-
-IndexedDBContext.prototype.clear = function(callback) {
-  try {
-    var objectStore = this._getObjectStore();
-    var request = objectStore.clear();
-    request.onsuccess = function() {
-      callback();
-    };
-    request.onerror = function(event) {
-      event.preventDefault();
-      callback(event.error);
-    };
-  } catch(err) {
-    callback(err);
-  }
-};
-
-IndexedDBContext.prototype._get = function(key, callback) {
-  try {
-    var objectStore = this._getObjectStore();
-    var request = objectStore.get(key);
-    request.onsuccess = function onsuccess(event) {
-      var result = event.target.result;
-      callback(null, result);
-    };
-    request.onerror = function(event) {
-      event.preventDefault();
-      callback(event.error);
-    };
-  } catch(err) {
-    callback(err);
-  }
-};
-IndexedDBContext.prototype.getObject = function(key, callback) {
-  this._get(key, callback);
-};
-IndexedDBContext.prototype.getBuffer = function(key, callback) {
-  this._get(key, function(err, arrayBuffer) {
-    if(err) {
-      return callback(err);
-    }
-    callback(null, new FilerBuffer(arrayBuffer));
-  });
-};
-
-IndexedDBContext.prototype._put = function(key, value, callback) {
-  try {
-    var objectStore = this._getObjectStore();
-    var request = objectStore.put(value, key);
-    request.onsuccess = function onsuccess(event) {
-      var result = event.target.result;
-      callback(null, result);
-    };
-    request.onerror = function(event) {
-      event.preventDefault();
-      callback(event.error);
-    };
-  } catch(err) {
-    callback(err);
-  }
-};
-IndexedDBContext.prototype.putObject = function(key, value, callback) {
-  this._put(key, value, callback);
-};
-IndexedDBContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {
-  var buf;
-  if(!Buffer._useTypedArrays) { // workaround for fxos 1.3
-    buf = uint8BackedBuffer.toArrayBuffer();
-  } else {
-    buf = uint8BackedBuffer.buffer;
-  }
-  this._put(key, buf, callback);
-};
-
-IndexedDBContext.prototype.delete = function(key, callback) {
-  try {
-    var objectStore = this._getObjectStore();
-    var request = objectStore.delete(key);
-    request.onsuccess = function onsuccess(event) {
-      var result = event.target.result;
-      callback(null, result);
-    };
-    request.onerror = function(event) {
-      event.preventDefault();
-      callback(event.error);
-    };
-  } catch(err) {
-    callback(err);
-  }
-};
-
-
-function IndexedDB(name) {
-  this.name = name || FILE_SYSTEM_NAME;
-  this.db = null;
-}
-IndexedDB.isSupported = function() {
-  return !!indexedDB;
-};
-
-IndexedDB.prototype.open = function(callback) {
-  var that = this;
-
-  // Bail if we already have a db open
-  if(that.db) {
-    return callback();
-  }
-
-  try {
-    // NOTE: we're not using versioned databases.
-    var openRequest = indexedDB.open(that.name);
-
-    // If the db doesn't exist, we'll create it
-    openRequest.onupgradeneeded = function onupgradeneeded(event) {
-      var db = event.target.result;
-
-      if(db.objectStoreNames.contains(FILE_STORE_NAME)) {
-        db.deleteObjectStore(FILE_STORE_NAME);
-      }
-      db.createObjectStore(FILE_STORE_NAME);
-    };
-
-    openRequest.onsuccess = function onsuccess(event) {
-      that.db = event.target.result;
-      callback();
-    };
-    openRequest.onerror = function onerror(event) {
-      event.preventDefault();
-      callback(event.error);
-    };
-  } catch(err) {
-    callback(err);
-  }
-};
-
-IndexedDB.prototype.getReadOnlyContext = function() {
-  return new IndexedDBContext(this.db, IDB_RO);
-};
-IndexedDB.prototype.getReadWriteContext = function() {
-  return new IndexedDBContext(this.db, IDB_RW);
-};
-
-module.exports = IndexedDB;
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
-},{"../buffer.js":51,"../constants.js":52,"../errors.js":55,"buffer":8}],65:[function(require,module,exports){
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-// NOTE: prefer setImmediate to nextTick for proper recursion yielding.
-// see https://github.com/js-platform/filer/pull/24
-var asyncCallback = require('../../lib/async.js').setImmediate;
-
-/**
- * Make shared in-memory DBs possible when using the same name.
- */
-var createDB = (function() {
-  var pool = {};
-  return function getOrCreate(name) {
-    if(!pool.hasOwnProperty(name)) {
-      pool[name] = {};
-    }
-    return pool[name];
-  };
-}());
-
-function MemoryContext(db, readOnly) {
-  this.readOnly = readOnly;
-  this.objectStore = db;
-}
-
-MemoryContext.prototype.clear = function(callback) {
-  if(this.readOnly) {
-    asyncCallback(function() {
-      callback("[MemoryContext] Error: write operation on read only context");
-    });
-    return;
-  }
-  var objectStore = this.objectStore;
-  Object.keys(objectStore).forEach(function(key){
-    delete objectStore[key];
-  });
-  asyncCallback(callback);
-};
-
-// Memory context doesn't care about differences between Object and Buffer
-MemoryContext.prototype.getObject =
-MemoryContext.prototype.getBuffer =
-function(key, callback) {
-  var that = this;
-  asyncCallback(function() {
-    callback(null, that.objectStore[key]);
-  });
-};
-MemoryContext.prototype.putObject =
-MemoryContext.prototype.putBuffer =
-function(key, value, callback) {
-  if(this.readOnly) {
-    asyncCallback(function() {
-      callback("[MemoryContext] Error: write operation on read only context");
-    });
-    return;
-  }
-  this.objectStore[key] = value;
-  asyncCallback(callback);
-};
-
-MemoryContext.prototype.delete = function(key, callback) {
-  if(this.readOnly) {
-    asyncCallback(function() {
-      callback("[MemoryContext] Error: write operation on read only context");
-    });
-    return;
-  }
-  delete this.objectStore[key];
-  asyncCallback(callback);
-};
-
-
-function Memory(name) {
-  this.name = name || FILE_SYSTEM_NAME;
-}
-Memory.isSupported = function() {
-  return true;
-};
-
-Memory.prototype.open = function(callback) {
-  this.db = createDB(this.name);
-  asyncCallback(callback);
-};
-Memory.prototype.getReadOnlyContext = function() {
-  return new MemoryContext(this.db, true);
-};
-Memory.prototype.getReadWriteContext = function() {
-  return new MemoryContext(this.db, false);
-};
-
-module.exports = Memory;
-
-},{"../../lib/async.js":1,"../constants.js":52}],66:[function(require,module,exports){
-(function (global){
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-var FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;
-var WSQL_VERSION = require('../constants.js').WSQL_VERSION;
-var WSQL_SIZE = require('../constants.js').WSQL_SIZE;
-var WSQL_DESC = require('../constants.js').WSQL_DESC;
-var Errors = require('../errors.js');
-var FilerBuffer = require('../buffer.js');
-var base64ArrayBuffer = require('base64-arraybuffer');
-
-function WebSQLContext(db, isReadOnly) {
-  var that = this;
-  this.getTransaction = function(callback) {
-    if(that.transaction) {
-      callback(that.transaction);
-      return;
-    }
-    // Either do readTransaction() (read-only) or transaction() (read/write)
-    db[isReadOnly ? 'readTransaction' : 'transaction'](function(transaction) {
-      that.transaction = transaction;
-      callback(transaction);
-    });
-  };
-}
-
-WebSQLContext.prototype.clear = function(callback) {
-  function onError(transaction, error) {
-    callback(error);
-  }
-  function onSuccess(transaction, result) {
-    callback(null);
-  }
-  this.getTransaction(function(transaction) {
-    transaction.executeSql("DELETE FROM " + FILE_STORE_NAME + ";",
-                           [], onSuccess, onError);
-  });
-};
-
-function _get(getTransaction, key, callback) {
-  function onSuccess(transaction, result) {
-    // If the key isn't found, return null
-    var value = result.rows.length === 0 ? null : result.rows.item(0).data;
-    callback(null, value);
-  }
-  function onError(transaction, error) {
-    callback(error);
-  }
-  getTransaction(function(transaction) {
-    transaction.executeSql("SELECT data FROM " + FILE_STORE_NAME + " WHERE id = ? LIMIT 1;",
-                           [key], onSuccess, onError);
-  });
-}
-WebSQLContext.prototype.getObject = function(key, callback) {
-  _get(this.getTransaction, key, function(err, result) {
-    if(err) {
-      return callback(err);
-    }
-
-    try {
-      if(result) {
-        result = JSON.parse(result);
-      }
-    } catch(e) {
-      return callback(e);
-    }
-
-    callback(null, result);
-  });
-};
-WebSQLContext.prototype.getBuffer = function(key, callback) {
-  _get(this.getTransaction, key, function(err, result) {
-    if(err) {
-      return callback(err);
-    }
-
-    // Deal with zero-length ArrayBuffers, which will be encoded as ''
-    if(result || result === '') {
-      var arrayBuffer = base64ArrayBuffer.decode(result);
-      result = new FilerBuffer(arrayBuffer);
-    }
-
-    callback(null, result);
-  });
-};
-
-function _put(getTransaction, key, value, callback) {
-  function onSuccess(transaction, result) {
-    callback(null);
-  }
-  function onError(transaction, error) {
-    callback(error);
-  }
-  getTransaction(function(transaction) {
-    transaction.executeSql("INSERT OR REPLACE INTO " + FILE_STORE_NAME + " (id, data) VALUES (?, ?);",
-                           [key, value], onSuccess, onError);
-  });
-}
-WebSQLContext.prototype.putObject = function(key, value, callback) {
-  var json = JSON.stringify(value);
-  _put(this.getTransaction, key, json, callback);
-};
-WebSQLContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {
-  var base64 = base64ArrayBuffer.encode(uint8BackedBuffer.buffer);
-  _put(this.getTransaction, key, base64, callback);
-};
-
-WebSQLContext.prototype.delete = function(key, callback) {
-  function onSuccess(transaction, result) {
-    callback(null);
-  }
-  function onError(transaction, error) {
-    callback(error);
-  }
-  this.getTransaction(function(transaction) {
-    transaction.executeSql("DELETE FROM " + FILE_STORE_NAME + " WHERE id = ?;",
-                           [key], onSuccess, onError);
-  });
-};
-
-
-function WebSQL(name) {
-  this.name = name || FILE_SYSTEM_NAME;
-  this.db = null;
-}
-WebSQL.isSupported = function() {
-  return !!global.openDatabase;
-};
-
-WebSQL.prototype.open = function(callback) {
-  var that = this;
-
-  // Bail if we already have a db open
-  if(that.db) {
-    return callback();
-  }
-
-  var db = global.openDatabase(that.name, WSQL_VERSION, WSQL_DESC, WSQL_SIZE);
-  if(!db) {
-    callback("[WebSQL] Unable to open database.");
-    return;
-  }
-
-  function onError(transaction, error) {
-    if (error.code === 5) {
-      callback(new Errors.EINVAL('WebSQL cannot be accessed. If private browsing is enabled, disable it.'));
-    }
-    callback(error);
-  }
-  function onSuccess(transaction, result) {
-    that.db = db;
-    callback();
-  }
-
-  // Create the table and index we'll need to store the fs data.
-  db.transaction(function(transaction) {
-    function createIndex(transaction) {
-      transaction.executeSql("CREATE INDEX IF NOT EXISTS idx_" + FILE_STORE_NAME + "_id" +
-                             " on " + FILE_STORE_NAME + " (id);",
-                             [], onSuccess, onError);
-    }
-    transaction.executeSql("CREATE TABLE IF NOT EXISTS " + FILE_STORE_NAME + " (id unique, data TEXT);",
-                           [], createIndex, onError);
-  });
-};
-WebSQL.prototype.getReadOnlyContext = function() {
-  return new WebSQLContext(this.db, true);
-};
-WebSQL.prototype.getReadWriteContext = function() {
-  return new WebSQLContext(this.db, false);
-};
-
-module.exports = WebSQL;
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../buffer.js":51,"../constants.js":52,"../errors.js":55,"base64-arraybuffer":6}],67:[function(require,module,exports){
-function guid() {
-  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
-    var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
-    return v.toString(16);
-  }).toUpperCase();
-}
-
-function nop() {}
-
-/**
- * Convert a Uint8Array to a regular array
- */
-function u8toArray(u8) {
-  var array = [];
-  var len = u8.length;
-  for(var i = 0; i < len; i++) {
-    array[i] = u8[i];
-  }
-  return array;
-}
-
-module.exports = {
-  guid: guid,
-  u8toArray: u8toArray,
-  nop: nop
-};
-
-},{}],68:[function(require,module,exports){
-var defaults = require('../constants.js').ENVIRONMENT;
-
-module.exports = function Environment(env) {
-  env = env || {};
-  env.TMP = env.TMP || defaults.TMP;
-  env.PATH = env.PATH || defaults.PATH;
-
-  this.get = function(name) {
-    return env[name];
-  };
-
-  this.set = function(name, value) {
-    env[name] = value;
-  };
-};
-
-},{"../constants.js":52}],69:[function(require,module,exports){
-var Path = require('../path.js');
-var Errors = require('../errors.js');
-var Environment = require('./environment.js');
-var async = require('../../lib/async.js');
-var Encoding = require('../encoding.js');
-var minimatch = require('minimatch');
-
-function Shell(fs, options) {
-  options = options || {};
-
-  var env = new Environment(options.env);
-  var cwd = '/';
-
-  /**
-   * The bound FileSystem (cannot be changed)
-   */
-  Object.defineProperty(this, 'fs', {
-    get: function() { return fs; },
-    enumerable: true
-  });
-
-  /**
-   * The shell's environment (e.g., for things like
-   * path, tmp, and other env vars). Use env.get()
-   * and env.set() to work with variables.
-   */
-  Object.defineProperty(this, 'env', {
-    get: function() { return env; },
-    enumerable: true
-  });
-
-  /**
-   * Change the current working directory. We
-   * include `cd` on the `this` vs. proto so that
-   * we can access cwd without exposing it externally.
-   */
-  this.cd = function(path, callback) {
-    path = Path.resolve(cwd, path);
-    // Make sure the path actually exists, and is a dir
-    fs.stat(path, function(err, stats) {
-      if(err) {
-        callback(new Errors.ENOTDIR(null, path));
-        return;
-      }
-      if(stats.type === 'DIRECTORY') {
-        cwd = path;
-        callback();
-      } else {
-        callback(new Errors.ENOTDIR(null, path));
-      }
-    });
-  };
-
-  /**
-   * Get the current working directory (changed with `cd()`)
-   */
-  this.pwd = function() {
-    return cwd;
-  };
-}
-
-/**
- * Execute the .js command located at `path`. Such commands
- * should assume the existence of 3 arguments, which will be
- * defined at runtime:
- *
- *   * fs - the current shell's bound filesystem object
- *   * args - a list of arguments for the command, or an empty list if none
- *   * callback - a callback function(error, result) to call when done.
- *
- * The .js command's contents should be the body of a function
- * that looks like this:
- *
- * function(fs, args, callback) {
- *   // .js code here
- * }
- */
-Shell.prototype.exec = function(path, args, callback) {
-  /* jshint evil:true */
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof args === 'function') {
-    callback = args;
-    args = [];
-  }
-  args = args || [];
-  callback = callback || function(){};
-  path = Path.resolve(sh.pwd(), path);
-
-  fs.readFile(path, "utf8", function(error, data) {
-    if(error) {
-      callback(error);
-      return;
-    }
-    try {
-      var cmd = new Function('fs', 'args', 'callback', data);
-      cmd(fs, args, callback);
-    } catch(e) {
-      callback(e);
-    }
-  });
-};
-
-/**
- * Create a file if it does not exist, or update access and
- * modified times if it does. Valid options include:
- *
- *  * updateOnly - whether to create the file if missing (defaults to false)
- *  * date - use the provided Date value instead of current date/time
- */
-Shell.prototype.touch = function(path, options, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof options === 'function') {
-    callback = options;
-    options = {};
-  }
-  options = options || {};
-  callback = callback || function(){};
-  path = Path.resolve(sh.pwd(), path);
-
-  function createFile(path) {
-    fs.writeFile(path, '', callback);
-  }
-
-  function updateTimes(path) {
-    var now = Date.now();
-    var atime = options.date || now;
-    var mtime = options.date || now;
-
-    fs.utimes(path, atime, mtime, callback);
-  }
-
-  fs.stat(path, function(error, stats) {
-    if(error) {
-      if(options.updateOnly === true) {
-        callback();
-      } else {
-        createFile(path);
-      }
-    } else {
-      updateTimes(path);
-    }
-  });
-};
-
-/**
- * Concatenate multiple files into a single String, with each
- * file separated by a newline. The `files` argument should
- * be a String (path to single file) or an Array of Strings
- * (multiple file paths).
- */
-Shell.prototype.cat = function(files, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  var all = '';
-  callback = callback || function(){};
-
-  if(!files) {
-    callback(new Errors.EINVAL('Missing files argument'));
-    return;
-  }
-
-  files = typeof files === 'string' ? [ files ] : files;
-
-  function append(item, callback) {
-    var filename = Path.resolve(sh.pwd(), item);
-    fs.readFile(filename, 'utf8', function(error, data) {
-      if(error) {
-        callback(error);
-        return;
-      }
-      all += data + '\n';
-      callback();
-    });
-  }
-
-  async.eachSeries(files, append, function(error) {
-    if(error) {
-      callback(error);
-    } else {
-      callback(null, all.replace(/\n$/, ''));
-    }
-  });
-};
-
-/**
- * Get the listing of a directory, returning an array of
- * file entries in the following form:
- *
- * {
- *   path: <String> the basename of the directory entry
- *   links: <Number> the number of links to the entry
- *   size: <Number> the size in bytes of the entry
- *   modified: <Number> the last modified date/time
- *   type: <String> the type of the entry
- *   contents: <Array> an optional array of child entries
- * }
- *
- * By default ls() gives a shallow listing. If you want
- * to follow directories as they are encountered, use
- * the `recursive=true` option.
- */
-Shell.prototype.ls = function(dir, options, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof options === 'function') {
-    callback = options;
-    options = {};
-  }
-  options = options || {};
-  callback = callback || function(){};
-
-  if(!dir) {
-    callback(new Errors.EINVAL('Missing dir argument'));
-    return;
-  }
-
-  function list(path, callback) {
-    var pathname = Path.resolve(sh.pwd(), path);
-    var result = [];
-
-    fs.readdir(pathname, function(error, entries) {
-      if(error) {
-        callback(error);
-        return;
-      }
-
-      function getDirEntry(name, callback) {
-        name = Path.join(pathname, name);
-        fs.stat(name, function(error, stats) {
-          if(error) {
-            callback(error);
-            return;
-          }
-          var entry = stats;
-
-          if(options.recursive && stats.type === 'DIRECTORY') {
-            list(Path.join(pathname, entry.name), function(error, items) {
-              if(error) {
-                callback(error);
-                return;
-              }
-              entry.contents = items;
-              result.push(entry);
-              callback();
-            });
-          } else {
-            result.push(entry);
-            callback();
-          }
-        });
-      }
-
-      async.eachSeries(entries, getDirEntry, function(error) {
-        callback(error, result);
-      });
-    });
-  }
-
-  list(dir, callback);
-};
-
-/**
- * Removes the file or directory at `path`. If `path` is a file
- * it will be removed. If `path` is a directory, it will be
- * removed if it is empty, otherwise the callback will receive
- * an error. In order to remove non-empty directories, use the
- * `recursive=true` option.
- */
-Shell.prototype.rm = function(path, options, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof options === 'function') {
-    callback = options;
-    options = {};
-  }
-  options = options || {};
-  callback = callback || function(){};
-
-  if(!path) {
-    callback(new Errors.EINVAL('Missing path argument'));
-    return;
-  }
-
-  function remove(pathname, callback) {
-    pathname = Path.resolve(sh.pwd(), pathname);
-    fs.stat(pathname, function(error, stats) {
-      if(error) {
-        callback(error);
-        return;
-      }
-
-      // If this is a file, delete it and we're done
-      if(stats.type === 'FILE') {
-        fs.unlink(pathname, callback);
-        return;
-      }
-
-      // If it's a dir, check if it's empty
-      fs.readdir(pathname, function(error, entries) {
-        if(error) {
-          callback(error);
-          return;
-        }
-
-        // If dir is empty, delete it and we're done
-        if(entries.length === 0) {
-          fs.rmdir(pathname, callback);
-          return;
-        }
-
-        // If not, see if we're allowed to delete recursively
-        if(!options.recursive) {
-          callback(new Errors.ENOTEMPTY(null, pathname));
-          return;
-        }
-
-        // Remove each dir entry recursively, then delete the dir.
-        entries = entries.map(function(filename) {
-          // Root dir entries absolutely
-          return Path.join(pathname, filename);
-        });
-        async.eachSeries(entries, remove, function(error) {
-          if(error) {
-            callback(error);
-            return;
-          }
-          fs.rmdir(pathname, callback);
-        });
-      });
-    });
-  }
-
-  remove(path, callback);
-};
-
-/**
- * Gets the path to the temporary directory, creating it if not
- * present. The directory used is the one specified in
- * env.TMP. The callback receives (error, tempDirName).
- */
-Shell.prototype.tempDir = function(callback) {
-  var sh = this;
-  var fs = sh.fs;
-  var tmp = sh.env.get('TMP');
-  callback = callback || function(){};
-
-  // Try and create it, and it will either work or fail
-  // but either way it's now there.
-  fs.mkdir(tmp, function(err) {
-    callback(null, tmp);
-  });
-};
-
-/**
- * Recursively creates the directory at `path`. If the parent
- * of `path` does not exist, it will be created.
- * Based off EnsureDir by Sam X. Xu
- * https://www.npmjs.org/package/ensureDir
- * MIT License
- */
-Shell.prototype.mkdirp = function(path, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  callback = callback || function(){};
-
-  if(!path) {
-    callback(new Errors.EINVAL('Missing path argument'));
-    return;
-  }
-  else if (path === '/') {
-    callback();
-    return;
-  }
-  function _mkdirp(path, callback) {
-    fs.stat(path, function (err, stat) {
-      if(stat) {
-        if(stat.isDirectory()) {
-          callback();
-          return;
-        }
-        else if (stat.isFile()) {
-          callback(new Errors.ENOTDIR(null, path));
-          return;
-        }
-      }
-      else if (err && err.code !== 'ENOENT') {
-        callback(err);
-        return;
-      }
-      else {
-        var parent = Path.dirname(path);
-        if(parent === '/') {
-          fs.mkdir(path, function (err) {
-            if (err && err.code != 'EEXIST') {
-              callback(err);
-              return;
-            }
-            callback();
-            return;
-          });
-        }
-        else {
-          _mkdirp(parent, function (err) {
-            if (err) return callback(err);
-            fs.mkdir(path, function (err) {
-              if (err && err.code != 'EEXIST') {
-                callback(err);
-                return;
-              }
-              callback();
-              return;
-            });
-          });
-        }
-      }
-    });
-  }
-
-  _mkdirp(path, callback);
-};
-
-/**
- * Recursively walk a directory tree, reporting back all paths
- * that were found along the way. The `path` must be a dir.
- * Valid options include a `regex` for pattern matching paths
- * and an `exec` function of the form `function(path, next)` where
- * `path` is the current path that was found (dir paths have an '/'
- * appended) and `next` is a callback to call when done processing
- * the current path, passing any error object back as the first argument.
- * `find` returns a flat array of absolute paths for all matching/found
- * paths as the final argument to the callback.
- */
- Shell.prototype.find = function(path, options, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof options === 'function') {
-    callback = options;
-    options = {};
-  }
-  options = options || {};
-  callback = callback || function(){};
-
-  var exec = options.exec || function(path, next) { next(); };
-  var found = [];
-
-  if(!path) {
-    callback(new Errors.EINVAL('Missing path argument'));
-    return;
-  }
-
-  function processPath(path, callback) {
-    exec(path, function(err) {
-      if(err) {
-        callback(err);
-        return;
-      }
-
-      found.push(path);
-      callback();
-    });
-  }
-
-  function maybeProcessPath(path, callback) {
-    // Test the path against the user's regex, name, path primaries (if any)
-    // and remove any trailing slashes added previously.
-    var rawPath = Path.removeTrailing(path);
-
-    // Check entire path against provided regex, if any
-    if(options.regex && !options.regex.test(rawPath)) {
-      callback();
-      return;
-    }
-
-    // Check basename for matches against name primary, if any
-    if(options.name && !minimatch(Path.basename(rawPath), options.name)) {
-      callback();
-      return;
-    }
-
-    // Check dirname for matches against path primary, if any
-    if(options.path && !minimatch(Path.dirname(rawPath), options.path)) {
-      callback();
-      return;
-    }
-
-    processPath(path, callback);
-  }
-
-  function walk(path, callback) {
-    path = Path.resolve(sh.pwd(), path);
-
-    // The path is either a file or dir, and instead of doing
-    // a stat() to determine it first, we just try to readdir()
-    // and it will either work or not, and we handle the non-dir error.
-    fs.readdir(path, function(err, entries) {
-      if(err) {
-        if(err.code === 'ENOTDIR' /* file case, ignore error */) {
-          maybeProcessPath(path, callback);
-        } else {
-          callback(err);
-        }
-        return;
-      }
-
-      // Path is really a dir, add a trailing / and report it found
-      maybeProcessPath(Path.addTrailing(path), function(err) {
-        if(err) {
-          callback(err);
-          return;
-        }
-
-        entries = entries.map(function(entry) {
-          return Path.join(path, entry);
-        });
-
-        async.eachSeries(entries, walk, function(err) {
-          callback(err, found);
-        });
-      });
-    });
-  }
-
-  // Make sure we are starting with a dir path
-  fs.stat(path, function(err, stats) {
-    if(err) {
-      callback(err);
-      return;
-    }
-    if(!stats.isDirectory()) {
-      callback(new Errors.ENOTDIR(null, path));
-      return;
-    }
-
-    walk(path, callback);
-  });
-};
-
-module.exports = Shell;
-
-},{"../../lib/async.js":1,"../encoding.js":54,"../errors.js":55,"../path.js":62,"./environment.js":68,"minimatch":41}],70:[function(require,module,exports){
-var Constants = require('./constants.js');
-var Path = require('./path.js');
-
-function Stats(path, fileNode, devName) {
-  this.dev = devName;
-  this.node = fileNode.id;
-  this.type = fileNode.type;
-  this.name = fileNode.name;
-  this.size = fileNode.size;
-  this.nlinks = fileNode.nlinks;
-  this.atime = fileNode.atime;
-  this.mtime = fileNode.mtime;
-  this.ctime = fileNode.ctime;
-  this.version = fileNode.version;
-  this.mode = fileNode.mode;
-  this.uid = fileNode.uid;
-  this.gid = fileNode.gid;
-  this.name = Path.basename(path);
-}
-
-Stats.prototype.isFile = function() {
-  return this.type === Constants.NODE_TYPE_FILE;
-};
-
-Stats.prototype.isDirectory = function() {
-  return this.type === Constants.NODE_TYPE_DIRECTORY;
-};
-
-Stats.prototype.isSymbolicLink = function() {
-  return this.type === Constants.NODE_TYPE_SYMBOLIC_LINK;
-};
-
-// These will always be false in Filer.
-Stats.prototype.isSocket          =
-Stats.prototype.isFIFO            =
-Stats.prototype.isCharacterDevice =
-Stats.prototype.isBlockDevice     =
-function() {
-  return false;
-};
-
-module.exports = Stats;
-
-},{"./constants.js":52,"./path.js":62}],71:[function(require,module,exports){
-var Constants = require('./constants.js');
-
-function SuperNode(options) {
-  var now = Date.now();
-
-  this.id = Constants.SUPER_NODE_ID;
-  this.type = Constants.NODE_TYPE_META;
-  this.atime = options.atime || now;
-  this.ctime = options.ctime || now;
-  this.mtime = options.mtime || now;
-  // root node id (randomly generated)
-  this.rnode = options.rnode;
-}
-
-SuperNode.create = function(options, callback) {
-  options.guid(function(err, rnode) {
-    if(err) {
-      callback(err);
-      return;
-    }
-    options.rnode = options.rnode || rnode;
-    callback(null, new SuperNode(options));
-  });
-};
-
-module.exports = SuperNode;
-
-},{"./constants.js":52}],72:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('trailing slashes in path names, issue 105', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should deal with trailing slashes properly, path == path/', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function(err) {
-      if(err) throw err;
-
-      fs.mkdir('/tmp/foo', function(err) {
-        if(err) throw err;
-
-        // Without trailing slash
-        fs.readdir('/tmp', function(err, result1) {
-          if(err) throw err;
-          expect(result1).to.exist;
-          expect(result1.length).to.equal(1);
-
-          // With trailing slash
-          fs.readdir('/tmp/', function(err, result2) {
-            if(err) throw err;
-            expect(result2).to.exist;
-            expect(result2[0]).to.equal('foo');
-            expect(result1).to.deep.equal(result2);
-            done();
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],73:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.writeFile truncation - issue 106', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should truncate an existing file', function(done) {
-    var fs = util.fs();
-    var filename = '/test';
-
-    fs.writeFile(filename, '1', function(err) {
-      if(err) throw err;
-
-      fs.stat(filename, function(err, stats) {
-        if(err) throw err;
-        expect(stats.size).to.equal(1);
-
-        fs.writeFile(filename, '', function(err) {
-          if(err) throw err;
-
-          fs.stat(filename, function(err, stats) {
-            if(err) throw err;
-            expect(stats.size).to.equal(0);
-            done();
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],74:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.writeFile and non-existing directory, issue 239', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should give ENOENT if writing to a dir that does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/abc.txt', 'content', function(err) {
-      expect(err).not.to.exist;
-
-      fs.writeFile('/abc.txt/abc.txt', 'content', function(err) {
-        expect(err.code).to.equal('ENOENT');
-        done();
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],75:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('sh.cd doesn\'t seem to be working from a relative path if I am one or more folders deep, #247', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should properly deal with relative paths missing ./ and ../', function(done) {
-    var fs = util.fs();
-    var sh = new fs.Shell();
-
-    sh.mkdirp('/home/scott', function(err) {
-      if(err) throw err;
-
-      sh.cd('/', function(err) {
-        if(err) throw err;
-
-        expect(sh.pwd()).to.equal('/');
-
-        sh.cd('home', function(err) {
-          if(err) throw err;
-
-          expect(sh.pwd()).to.equal('/home');
-
-          sh.cd('scott', function(err) {
-            if(err) throw err;
-
-            expect(sh.pwd()).to.equal('/home/scott');
-            done();
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],76:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('Filer.Buffer should accept initialized ArrayBuffers, issue 249', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should accept an ArrayBuffer with a specified size', function(done) {
-    var buffer = new Filer.Buffer(new ArrayBuffer(5));
-    expect(buffer.length).to.equal(5);
-    done();
-  });
-});
-
-describe('Filer.Buffer static methods are in tact, issue 249', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should proxy Buffer.isBuffer', function(done) {
-    expect(Filer.Buffer.isBuffer(new Filer.Buffer([]))).to.equal(true);
-    expect(Filer.Buffer.isBuffer('')).to.equal(false);
-    done();
-  });
-
-  it('should proxy Buffer.isEncoding', function(done) {
-    expect(Filer.Buffer.isEncoding('utf8')).to.equal(true);
-    expect(Filer.Buffer.isEncoding('smoop')).to.equal(false);
-    done();
-  });
-
-  it('should proxy Buffer.byteLength', function(done) {
-    expect(Filer.Buffer.byteLength('01100111', 'binary')).to.equal(8);
-    done();
-  });
-
-  it('should proxy Buffer.concat', function(done) {
-    expect(Filer.Buffer.concat([new Filer.Buffer(1), new Filer.Buffer(2)]).length).to.equal(3);
-    done();
-  });
-});
-
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],77:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('EISDIR when trying to open a dir path - issue 254', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should fail with EISDIR for root dir', function(done) {
-    var fs = util.fs();
-
-    fs.readFile('/', function(err) {
-      expect(err.code).to.equal('EISDIR');
-      done();
-    });
-  });
-
-  it('should fail with EISDIR for regular dir', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      fs.readFile('/dir', function(err) {
-        expect(err.code).to.equal('EISDIR');
-        done();
-      });
-    });
-  });
-
-  it('should fail with EISDIR for symlinked dir', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      fs.symlink('/dir', '/link', function(err) {
-        if(err) throw err;
-
-        fs.readFile('/link', function(err) {
-          expect(err.code).to.equal('EISDIR');
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],78:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-var setImmediate = require('../../lib/async.js').setImmediate;
-
-describe('Queued operations should error when fs is in error state, issue 258', function() {
-  var provider;
-
-  // Provider that does nothing but fail on open.
-  function FailingProviderContext(){}
-  FailingProviderContext.prototype.clear = function(callback) {
-    this.failCallback(callback);
-  };
-  FailingProviderContext.prototype.getObject =
-  FailingProviderContext.prototype.getBuffer = function(key, callback) {
-    this.failCallback(callback);
-  };
-  FailingProviderContext.prototype.putObject =
-  FailingProviderContext.prototype.putBuffer = function(key, value, callback) {
-    this.failCallback(callback);
-  };
-  FailingProviderContext.prototype.delete = function(key, callback) {
-    this.failCallback(callback);
-  };
-
-  function FailingProvider() {
-    var self = this;
-    self.name = 'failure';
-    self.open = function(callback) {
-      // Wait until caller tells us to fail
-      self.failNow = function() {
-        self.failCallback(callback);
-      };
-    };
-    self.failCallback = function(callback) {
-      setImmediate(function() {
-        callback(new Error);
-      });
-    };
-  }
-  FailingProvider.prototype.getReadWriteContext =
-  FailingProvider.prototype.getReadWriteContext = function() {
-    return new FailingProviderContext();
-  };
-
-  beforeEach(function() {
-    provider = new FailingProvider();
-  });
-
-  afterEach(function() {
-    provider = null;
-  });
-
-  it('should get EFILESYSTEMERROR errors on callbacks to queued operations on provider error', function(done) {
-    var errCount = 0;
-    var fs = new Filer.FileSystem({provider: provider}, function(err) {
-      // Do nothing
-    });
-
-    function maybeDone(err) {
-      expect(err).to.exist;
-      expect(err.code).to.equal('EFILESYSTEMERROR');
-      errCount++;
-
-      if(errCount === 2) {
-        done();
-      }
-    }
-
-    // Queue some fs operations, and expect them to fail
-    fs.mkdir('/tmp', maybeDone);
-    fs.writeFile('/file', 'data', maybeDone);
-
-    // Operations are queued, tell the provider to fail now.
-    provider.failNow();
-  });
-
-  it('should get EFILESYSTEMERROR errors on callbacks to queued operations after ready callback', function(done) {
-    var fs = new Filer.FileSystem({provider: provider}, function(err) {
-      expect(err).to.exist;
-
-      // Queue is drained, but new operations should also fail
-      fs.mkdir('/tmp', function(err) {
-        expect(err).to.exist;
-        expect(err.code).to.equal('EFILESYSTEMERROR');
-        done();
-      });
-    });
-    provider.failNow();
-  });
-});
-
-},{"../..":59,"../../lib/async.js":1,"../lib/test-utils.js":87,"chai":10}],79:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.readdir on non-dir paths, issue 267', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should fail with ENOTDIR when called on filepath', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/myfile.txt', 'data', function(err) {
-      if(err) throw err;
-
-      fs.readdir('/myfile.txt', function(err, contents) {
-        expect(err).to.exist;
-        expect(err.code).to.equal('ENOTDIR');
-        done();
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],80:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('undefined and relative paths, issue270', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should fail with EINVAL when called on an undefined path', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile(undefined, 'data', function(err) {
-      expect(err).to.exist;
-      expect(err.code).to.equal('EINVAL');
-      done();
-    });
-  });
-
-  it('should fail with EINVAL when called on a relative path', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('relpath/file.txt', 'data', function(err) {
-      expect(err).to.exist;
-      expect(err.code).to.equal('EINVAL');
-      done();
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],81:[function(require,module,exports){
-var Path = require('../..').Path;
-var expect = require('chai').expect;
-
-describe('Path.resolve does not work, issue357', function() {
-  it('Path.relative() should not crash', function() {
-    expect(Path.relative("/mydir", "/mydir/file")).to.equal("file");
-
-    // https://nodejs.org/api/path.html#path_path_relative_from_to
-    expect(Path.relative("/data/orandea/test/aaa", "/data/orandea/impl/bbb")).to.equal("../../impl/bbb");
-  });
-
-  it('Path.resolve() should work as expectedh', function() {
-    // https://nodejs.org/api/path.html#path_path_resolve_from_to
-    expect(Path.resolve('/foo/bar', './baz')).to.equal('/foo/bar/baz');
-    expect(Path.resolve('/foo/bar', '/tmp/file/')).to.equal('/tmp/file');
-  });
-});
-
-},{"../..":59,"chai":10}],82:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-var async = require('../../lib/async.js');
-
-describe('sh.ls and deep directory trees', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should not crash when calling sh.ls() on deep directory layouts', function(done) {
-    var fs = util.fs();
-    var sh = new fs.Shell();
-
-    var path = '';
-    for(var i=0; i<50; i++) {
-      path += '/' + i;
-    }
-
-    sh.mkdirp(path, function(err) {
-      if(err) throw err;
-
-      sh.ls('/', {recursive: true}, function(err, listing) {
-        expect(err).not.to.exist;
-        expect(listing).to.exist;
-        done();
-      });
-    });
-  }).timeout(15000);
-
-  it('should not crash when calling sh.ls() on wide directory layouts', function(done) {
-    var fs = util.fs();
-    var sh = new fs.Shell();
-
-    var dirName = '/dir';
-
-    fs.mkdir(dirName, function(err) {
-      if(err) throw err;
-
-      var paths = [];
-      for(var i=0; i<100; i++) {
-        paths.push(Filer.Path.join(dirName, ''+i));
-      }
-
-      function writeFile(path, callback) {
-        fs.writeFile(path, 'data', callback);
-      }
-
-      async.eachSeries(paths, writeFile, function(err) {
-        if(err) { console.log('error', err);  throw err; }
-
-        sh.ls('/', {recursive: true}, function(err, listing) {
-          expect(err).not.to.exist;
-          expect(listing).to.exist;
-          done();
-        });
-      });
-    });
-  }).timeout(15000);
-});
-
-},{"../..":59,"../../lib/async.js":1,"../lib/test-utils.js":87,"chai":10}],83:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('trailing slashes in path names to work when renaming a dir', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should deal with trailing slashes in rename, dir == dir/', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function(err) {
-      if(err) throw err;
-
-      fs.rename('/tmp/', '/new-tmp/', function(err) {
-        if(err) throw err;
-
-        fs.stat('/new-tmp', function(err, stats) {
-          if(err) throw err;
-          expect(stats).to.exist;
-          expect(stats.isDirectory()).to.be.true;
-
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],84:[function(require,module,exports){
-/**
- * Add your test spec files to the list in order to
- * get them running by default.
- */
-
-// Filer
-require("./spec/filer.spec");
-
-// Filer.FileSystem.*
-require("./spec/filer.filesystem.spec");
-require("./spec/fs.spec");
-require("./spec/fs.stat.spec");
-require("./spec/fs.lstat.spec");
-require("./spec/fs.exists.spec");
-require("./spec/fs.mknod.spec");
-require("./spec/fs.mkdir.spec");
-require("./spec/fs.readdir.spec");
-require("./spec/fs.rmdir.spec");
-require("./spec/fs.open.spec");
-require("./spec/fs.write.spec");
-require("./spec/fs.writeFile-readFile.spec");
-require("./spec/fs.appendFile.spec");
-require("./spec/fs.read.spec");
-require("./spec/fs.close.spec");
-require("./spec/fs.link.spec");
-require("./spec/fs.unlink.spec");
-require("./spec/fs.rename.spec");
-require("./spec/fs.lseek.spec");
-require("./spec/fs.symlink.spec");
-require("./spec/fs.readlink.spec");
-require("./spec/fs.truncate.spec");
-require("./spec/fs.utimes.spec");
-require("./spec/fs.xattr.spec");
-require("./spec/fs.stats.spec");
-require("./spec/path-resolution.spec");
-require("./spec/trailing-slashes.spec");
-require("./spec/times.spec");
-require("./spec/time-flags.spec");
-require("./spec/fs.watch.spec");
-require("./spec/errors.spec");
-require("./spec/fs.shell.spec");
-
-// Filer.FileSystem.providers.*
-require("./spec/providers/providers.spec");
-require("./spec/providers/providers.indexeddb.spec");
-require("./spec/providers/providers.websql.spec");
-require("./spec/providers/providers.memory.spec");
-
-// Filer.FileSystemShell.*
-require("./spec/shell/cd.spec");
-require("./spec/shell/touch.spec");
-require("./spec/shell/exec.spec");
-require("./spec/shell/cat.spec");
-require("./spec/shell/ls.spec");
-require("./spec/shell/rm.spec");
-require("./spec/shell/env.spec");
-require("./spec/shell/mkdirp.spec");
-require("./spec/shell/find.spec");
-
-// Ported node.js tests (filenames match names in https://github.com/joyent/node/tree/master/test)
-require("./spec/node-js/simple/test-fs-mkdir");
-require("./spec/node-js/simple/test-fs-null-bytes");
-require("./spec/node-js/simple/test-fs-watch");
-require("./spec/node-js/simple/test-fs-watch-recursive");
-
-// Regressions, Bugs
-// NOTE: bugs/issue225.js has to be run outside this step, see gruntfile.js
-require("./bugs/issue105");
-require("./bugs/issue106");
-require("./bugs/issue239");
-require("./bugs/issue249");
-require("./bugs/ls-depth-bug");
-require("./bugs/issue247.js");
-require("./bugs/issue254.js");
-require("./bugs/issue258.js");
-require("./bugs/issue267.js");
-require("./bugs/issue270.js");
-require("./bugs/rename-dir-trailing-slash.js");
-require("./bugs/issue357.js");
-
-},{"./bugs/issue105":72,"./bugs/issue106":73,"./bugs/issue239":74,"./bugs/issue247.js":75,"./bugs/issue249":76,"./bugs/issue254.js":77,"./bugs/issue258.js":78,"./bugs/issue267.js":79,"./bugs/issue270.js":80,"./bugs/issue357.js":81,"./bugs/ls-depth-bug":82,"./bugs/rename-dir-trailing-slash.js":83,"./spec/errors.spec":89,"./spec/filer.filesystem.spec":90,"./spec/filer.spec":91,"./spec/fs.appendFile.spec":92,"./spec/fs.close.spec":93,"./spec/fs.exists.spec":94,"./spec/fs.link.spec":95,"./spec/fs.lseek.spec":96,"./spec/fs.lstat.spec":97,"./spec/fs.mkdir.spec":98,"./spec/fs.mknod.spec":99,"./spec/fs.open.spec":100,"./spec/fs.read.spec":101,"./spec/fs.readdir.spec":102,"./spec/fs.readlink.spec":103,"./spec/fs.rename.spec":104,"./spec/fs.rmdir.spec":105,"./spec/fs.shell.spec":106,"./spec/fs.spec":107,"./spec/fs.stat.spec":108,"./spec/fs.stats.spec":109,"./spec/fs.symlink.spec":110,"./spec/fs.truncate.spec":111,"./spec/fs.unlink.spec":112,"./spec/fs.utimes.spec":113,"./spec/fs.watch.spec":114,"./spec/fs.write.spec":115,"./spec/fs.writeFile-readFile.spec":116,"./spec/fs.xattr.spec":117,"./spec/node-js/simple/test-fs-mkdir":118,"./spec/node-js/simple/test-fs-null-bytes":119,"./spec/node-js/simple/test-fs-watch":121,"./spec/node-js/simple/test-fs-watch-recursive":120,"./spec/path-resolution.spec":122,"./spec/providers/providers.indexeddb.spec":124,"./spec/providers/providers.memory.spec":125,"./spec/providers/providers.spec":126,"./spec/providers/providers.websql.spec":127,"./spec/shell/cat.spec":128,"./spec/shell/cd.spec":129,"./spec/shell/env.spec":130,"./spec/shell/exec.spec":131,"./spec/shell/find.spec":132,"./spec/shell/ls.spec":133,"./spec/shell/mkdirp.spec":134,"./spec/shell/rm.spec":135,"./spec/shell/touch.spec":136,"./spec/time-flags.spec":137,"./spec/times.spec":138,"./spec/trailing-slashes.spec":139}],85:[function(require,module,exports){
-(function (global){
-var Filer = require("../..");
-
-var indexedDB = global.indexedDB       ||
-                global.mozIndexedDB    ||
-                global.webkitIndexedDB ||
-                global.msIndexedDB;
-
-var needsCleanup = [];
-if(global.addEventListener) {
-  global.addEventListener('beforeunload', function() {
-    needsCleanup.forEach(function(f) { f(); });
-  });
-}
-
-function IndexedDBTestProvider(name) {
-  var _done = false;
-  var that = this;
-
-  function cleanup(callback) {
-    callback = callback || function(){};
-
-    if(!that.provider || _done) {
-      return callback();
-    }
-
-    function finished() {
-      that.provider = null;
-      _done = true;
-      callback();
-    }
-
-    try {
-      // We have to force any other connections to close
-      // before we can delete a db.
-      if(that.provider.db) {
-        that.provider.db.close();
-      }
-
-      var request = indexedDB.deleteDatabase(name);
-      request.onsuccess = finished;
-      request.onerror = finished;
-    } catch(e) {
-      console.log("Failed to delete test database", e);
-      finished();
-    }
-  }
-
-  function init() {
-    if(that.provider) {
-      return;
-    }
-    that.provider = new Filer.FileSystem.providers.IndexedDB(name);
-    needsCleanup.push(cleanup);
-  }
-
-  this.init = init;
-  this.cleanup = cleanup;
-}
-IndexedDBTestProvider.isSupported = function() {
-  return Filer.FileSystem.providers.IndexedDB.isSupported();
-};
-
-module.exports = IndexedDBTestProvider;
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../..":59}],86:[function(require,module,exports){
-var Filer = require('../..');
-
-function MemoryTestProvider(name) {
-  var that = this;
-
-  function cleanup(callback) {
-    callback = callback || function(){};
-
-    that.provider = null;
-    callback();
-  }
-
-  function init() {
-    if(that.provider) {
-      return;
-    }
-    that.provider = new Filer.FileSystem.providers.Memory(name);
-  }
-
-  this.init = init;
-  this.cleanup = cleanup;
-}
-MemoryTestProvider.isSupported = function() {
-  return Filer.FileSystem.providers.Memory.isSupported();
-};
-
-module.exports = MemoryTestProvider;
-
-},{"../..":59}],87:[function(require,module,exports){
-(function (global){
-var Filer = require('../..');
-var IndexedDBTestProvider = require('./indexeddb.js');
-var WebSQLTestProvider = require('./websql.js');
-var MemoryTestProvider = require('./memory.js');
-var Url = require('url');
-
-var _provider;
-var _fs;
-
-function uniqueName() {
-  if(!uniqueName.seed) {
-    uniqueName.seed = Date.now();
-  }
-  return 'filer-testdb-' + uniqueName.seed++;
-}
-
-function findBestProvider() {
-  var providers = Filer.FileSystem.providers;
-  if(providers.IndexedDB.isSupported()) {
-    return IndexedDBTestProvider;
-  }
-  if(providers.WebSQL.isSupported()) {
-    return WebSQLTestProvider;
-  }
-  return MemoryTestProvider;
-}
-
-function getUrlParams() {
-  // Check if we are running in node
-  if(!global.location) {
-    return null;
-  }
-
-  var url = Url.parse(global.location.href, true);
-
-  return url.query;
-}
-
-function getProviderType() {
-  var defaultProvider = 'default';
-  var queryString = getUrlParams();
-
-  // If the environment is node or the query string is empty,
-  // the memory provider will be used.
-  if(!queryString) {
-    return defaultProvider;
-  }
-
-  return queryString['filer-provider'] || defaultProvider;
-}
-
-function setup(callback) {
-  // In browser we support specifying the provider via the query string
-  // (e.g., ?filer-provider=IndexedDB). If not specified, we use
-  // the Memory provider by default.
-  var providerType = getProviderType();
-
-  var name = uniqueName();
-
-  switch(providerType.toLowerCase()) {
-    case 'indexeddb':
-      _provider = new IndexedDBTestProvider(name);
-      break;
-    case 'websql':
-      _provider = new WebSQLTestProvider(name);
-      break;
-    case 'memory':
-      _provider = new MemoryTestProvider(name);
-      break;
-    case 'default':
-    default:
-      var BestProvider = findBestProvider();
-      _provider = new BestProvider(name);
-      break;
-  }
-
-  // Allow passing FS flags on query string
-  var flags = global.filerArgs && global.filerArgs.flags ?
-    global.filerArgs.flags : 'FORMAT';
-
-  // Create a file system and wait for it to get setup
-  _provider.init();
-
-  function complete(err, fs) {
-    if(err) throw err;
-    _fs = fs;
-    callback();
-  }
-  return new Filer.FileSystem({
-    name: name,
-    provider: _provider.provider,
-    flags: flags
-  }, complete);
-}
-
-function fs() {
-  if(!_fs) {
-    throw "TestUtil: call setup() before fs()";
-  }
-  return _fs;
-}
-
-function provider() {
-  if(!_provider) {
-    throw "TestUtil: call setup() before provider()";
-  }
-  return _provider;
-}
-
-function shell(options) {
-  var _fs = fs();
-  return new _fs.Shell(options);
-}
-
-function cleanup(callback) {
-  if(!_provider) {
-    return;
-  }
-  _provider.cleanup(function() {
-    _provider = null;
-    _fs = null;
-    callback();
-  });
-}
-
-function typedArrayEqual(a, b) {
-  if(!(a && b)) {
-    return false;
-  }
-  if(a.length !== b.length) {
-    return false;
-  }
-
-  for(var i = 0; i < a.length; ++ i) {
-    if(a[i] !== b[i]) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-module.exports = {
-  uniqueName: uniqueName,
-  setup: setup,
-  fs: fs,
-  shell: shell,
-  provider: provider,
-  providers: {
-    IndexedDB: IndexedDBTestProvider,
-    WebSQL: WebSQLTestProvider,
-    Memory: MemoryTestProvider
-  },
-  cleanup: cleanup,
-  typedArrayEqual: typedArrayEqual
-};
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../..":59,"./indexeddb.js":85,"./memory.js":86,"./websql.js":88,"url":50}],88:[function(require,module,exports){
-(function (global){
-var Filer = require('../..');
-
-var needsCleanup = [];
-if(global.addEventListener) {
-  global.addEventListener('beforeunload', function() {
-    needsCleanup.forEach(function(f) { f(); });
-  });
-}
-
-function WebSQLTestProvider(name) {
-  var _done = false;
-  var that = this;
-
-  function cleanup(callback) {
-    callback = callback || function(){};
-
-    if(!that.provider || _done) {
-      return callback();
-    }
-
-    // Provider is there, but db was never touched
-    if(!that.provider.db) {
-      return callback();
-    }
-
-    var context = that.provider.getReadWriteContext();
-    context.clear(function() {
-      that.provider = null;
-      _done = true;
-      callback();
-    });
-  }
-
-  function init() {
-    if(that.provider) {
-      return;
-    }
-    that.provider = new Filer.FileSystem.providers.WebSQL(name);
-    needsCleanup.push(cleanup);
-  }
-
-  this.init = init;
-  this.cleanup = cleanup;
-}
-WebSQLTestProvider.isSupported = function() {
-  return Filer.FileSystem.providers.WebSQL.isSupported();
-};
-
-module.exports = WebSQLTestProvider;
-
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../..":59}],89:[function(require,module,exports){
-var Filer = require('../..');
-var expect = require('chai').expect;
-
-describe("Filer.Errors", function() {
-  it("has expected errors", function() {
-    expect(Filer.Errors).to.exist;
-
-    // By ctor -- if you add some to src/errors.js, also add here
-    //expect(Filer.Errors.UNKNOWN).to.be.a('function');
-    //expect(Filer.Errors.OK).to.be.a('function');
-    //expect(Filer.Errors.EOF).to.be.a('function');
-    //expect(Filer.Errors.EADDRINFO).to.be.a('function');
-    //expect(Filer.Errors.EACCES).to.be.a('function');
-    //expect(Filer.Errors.EAGAIN).to.be.a('function');
-    //expect(Filer.Errors.EADDRINUSE).to.be.a('function');
-    //expect(Filer.Errors.EADDRNOTAVAIL).to.be.a('function');
-    //expect(Filer.Errors.EAFNOSUPPORT).to.be.a('function');
-    //expect(Filer.Errors.EALREADY).to.be.a('function');
-    expect(Filer.Errors.EBADF).to.be.a('function');
-    expect(Filer.Errors.EBUSY).to.be.a('function');
-    //expect(Filer.Errors.ECONNABORTED).to.be.a('function');
-    //expect(Filer.Errors.ECONNREFUSED).to.be.a('function');
-    //expect(Filer.Errors.ECONNRESET).to.be.a('function');
-    //expect(Filer.Errors.EDESTADDRREQ).to.be.a('function');
-    //expect(Filer.Errors.EFAULT).to.be.a('function');
-    //expect(Filer.Errors.EHOSTUNREACH).to.be.a('function');
-    //expect(Filer.Errors.EINTR).to.be.a('function');
-    expect(Filer.Errors.EINVAL).to.be.a('function');
-    //expect(Filer.Errors.EISCONN).to.be.a('function');
-    //expect(Filer.Errors.EMFILE).to.be.a('function');
-    //expect(Filer.Errors.EMSGSIZE).to.be.a('function');
-    //expect(Filer.Errors.ENETDOWN).to.be.a('function');
-    //expect(Filer.Errors.ENETUNREACH).to.be.a('function');
-    //expect(Filer.Errors.ENFILE).to.be.a('function');
-    //expect(Filer.Errors.ENOBUFS).to.be.a('function');
-    //expect(Filer.Errors.ENOMEM).to.be.a('function');
-    expect(Filer.Errors.ENOTDIR).to.be.a('function');
-    expect(Filer.Errors.EISDIR).to.be.a('function');
-    //expect(Filer.Errors.ENONET).to.be.a('function');
-    //expect(Filer.Errors.ENOTCONN).to.be.a('function');
-    //expect(Filer.Errors.ENOTSOCK).to.be.a('function');
-    //expect(Filer.Errors.ENOTSUP).to.be.a('function');
-    expect(Filer.Errors.ENOENT).to.be.a('function');
-    //expect(Filer.Errors.ENOSYS).to.be.a('function');
-    //expect(Filer.Errors.EPIPE).to.be.a('function');
-    //expect(Filer.Errors.EPROTO).to.be.a('function');
-    //expect(Filer.Errors.EPROTONOSUPPORT).to.be.a('function');
-    //expect(Filer.Errors.EPROTOTYPE).to.be.a('function');
-    //expect(Filer.Errors.ETIMEDOUT).to.be.a('function');
-    //expect(Filer.Errors.ECHARSET).to.be.a('function');
-    //expect(Filer.Errors.EAIFAMNOSUPPORT).to.be.a('function');
-    //expect(Filer.Errors.EAISERVICE).to.be.a('function');
-    //expect(Filer.Errors.EAISOCKTYPE).to.be.a('function');
-    //expect(Filer.Errors.ESHUTDOWN).to.be.a('function');
-    expect(Filer.Errors.EEXIST).to.be.a('function');
-    //expect(Filer.Errors.ESRCH).to.be.a('function');
-    //expect(Filer.Errors.ENAMETOOLONG).to.be.a('function');
-    //expect(Filer.Errors.EPERM).to.be.a('function');
-    expect(Filer.Errors.ELOOP).to.be.a('function');
-    //expect(Filer.Errors.EXDEV).to.be.a('function');
-    expect(Filer.Errors.ENOTEMPTY).to.be.a('function');
-    //expect(Filer.Errors.ENOSPC).to.be.a('function');
-    expect(Filer.Errors.EIO).to.be.a('function');
-    //expect(Filer.Errors.EROFS).to.be.a('function');
-    //expect(Filer.Errors.ENODEV).to.be.a('function');
-    //expect(Filer.Errors.ESPIPE).to.be.a('function');
-    //expect(Filer.Errors.ECANCELED).to.be.a('function');
-    expect(Filer.Errors.ENOTMOUNTED).to.be.a('function');
-    expect(Filer.Errors.EFILESYSTEMERROR).to.be.a('function');
-    expect(Filer.Errors.ENOATTR).to.be.a('function');
-
-    // By errno
-    //expect(Filer.Errors[-1]).to.equal(Filer.Errors.UNKNOWN);
-    //expect(Filer.Errors[0]).to.equal(Filer.Errors.OK);
-    //expect(Filer.Errors[1]).to.equal(Filer.Errors.EOF);
-    //expect(Filer.Errors[2]).to.equal(Filer.Errors.EADDRINFO);
-    //expect(Filer.Errors[3]).to.equal(Filer.Errors.EACCES);
-    //expect(Filer.Errors[4]).to.equal(Filer.Errors.EAGAIN);
-    //expect(Filer.Errors[5]).to.equal(Filer.Errors.EADDRINUSE);
-    //expect(Filer.Errors[6]).to.equal(Filer.Errors.EADDRNOTAVAIL);
-    //expect(Filer.Errors[7]).to.equal(Filer.Errors.EAFNOSUPPORT);
-    //expect(Filer.Errors[8]).to.equal(Filer.Errors.EALREADY);
-    expect(Filer.Errors[9]).to.equal(Filer.Errors.EBADF);
-    expect(Filer.Errors[10]).to.equal(Filer.Errors.EBUSY);
-    //expect(Filer.Errors[11]).to.equal(Filer.Errors.ECONNABORTED);
-    //expect(Filer.Errors[12]).to.equal(Filer.Errors.ECONNREFUSED);
-    //expect(Filer.Errors[13]).to.equal(Filer.Errors.ECONNRESET);
-    //expect(Filer.Errors[14]).to.equal(Filer.Errors.EDESTADDRREQ);
-    //expect(Filer.Errors[15]).to.equal(Filer.Errors.EFAULT);
-    //expect(Filer.Errors[16]).to.equal(Filer.Errors.EHOSTUNREACH);
-    //expect(Filer.Errors[17]).to.equal(Filer.Errors.EINTR);
-    expect(Filer.Errors[18]).to.equal(Filer.Errors.EINVAL);
-    //expect(Filer.Errors[19]).to.equal(Filer.Errors.EISCONN);
-    //expect(Filer.Errors[20]).to.equal(Filer.Errors.EMFILE);
-    //expect(Filer.Errors[21]).to.equal(Filer.Errors.EMSGSIZE);
-    //expect(Filer.Errors[22]).to.equal(Filer.Errors.ENETDOWN);
-    //expect(Filer.Errors[23]).to.equal(Filer.Errors.ENETUNREACH);
-    //expect(Filer.Errors[24]).to.equal(Filer.Errors.ENFILE);
-    //expect(Filer.Errors[25]).to.equal(Filer.Errors.ENOBUFS);
-    //expect(Filer.Errors[26]).to.equal(Filer.Errors.ENOMEM);
-    expect(Filer.Errors[27]).to.equal(Filer.Errors.ENOTDIR);
-    expect(Filer.Errors[28]).to.equal(Filer.Errors.EISDIR);
-    //expect(Filer.Errors[29]).to.equal(Filer.Errors.ENONET);
-    //expect(Filer.Errors[31]).to.equal(Filer.Errors.ENOTCONN);
-    //expect(Filer.Errors[32]).to.equal(Filer.Errors.ENOTSOCK);
-    //expect(Filer.Errors[33]).to.equal(Filer.Errors.ENOTSUP);
-    expect(Filer.Errors[34]).to.equal(Filer.Errors.ENOENT);
-    //expect(Filer.Errors[35]).to.equal(Filer.Errors.ENOSYS);
-    //expect(Filer.Errors[36]).to.equal(Filer.Errors.EPIPE);
-    //expect(Filer.Errors[37]).to.equal(Filer.Errors.EPROTO);
-    //expect(Filer.Errors[38]).to.equal(Filer.Errors.EPROTONOSUPPORT);
-    //expect(Filer.Errors[39]).to.equal(Filer.Errors.EPROTOTYPE);
-    //expect(Filer.Errors[40]).to.equal(Filer.Errors.ETIMEDOUT);
-    //expect(Filer.Errors[41]).to.equal(Filer.Errors.ECHARSET);
-    //expect(Filer.Errors[42]).to.equal(Filer.Errors.EAIFAMNOSUPPORT);
-    //expect(Filer.Errors[44]).to.equal(Filer.Errors.EAISERVICE);
-    //expect(Filer.Errors[45]).to.equal(Filer.Errors.EAISOCKTYPE);
-    //expect(Filer.Errors[46]).to.equal(Filer.Errors.ESHUTDOWN);
-    expect(Filer.Errors[47]).to.equal(Filer.Errors.EEXIST);
-    //expect(Filer.Errors[48]).to.equal(Filer.Errors.ESRCH);
-    //expect(Filer.Errors[49]).to.equal(Filer.Errors.ENAMETOOLONG);
-    //expect(Filer.Errors[50]).to.equal(Filer.Errors.EPERM);
-    expect(Filer.Errors[51]).to.equal(Filer.Errors.ELOOP);
-    //expect(Filer.Errors[52]).to.equal(Filer.Errors.EXDEV);
-    expect(Filer.Errors[53]).to.equal(Filer.Errors.ENOTEMPTY);
-    //expect(Filer.Errors[54]).to.equal(Filer.Errors.ENOSPC);
-    expect(Filer.Errors[55]).to.equal(Filer.Errors.EIO);
-    //expect(Filer.Errors[56]).to.equal(Filer.Errors.EROFS);
-    //expect(Filer.Errors[57]).to.equal(Filer.Errors.ENODEV);
-    //expect(Filer.Errors[58]).to.equal(Filer.Errors.ESPIPE);
-    //expect(Filer.Errors[59]).to.equal(Filer.Errors.ECANCELED);
-    expect(Filer.Errors[1000]).to.equal(Filer.Errors.ENOTMOUNTED);
-    expect(Filer.Errors[1001]).to.equal(Filer.Errors.EFILESYSTEMERROR);
-    expect(Filer.Errors[1002]).to.equal(Filer.Errors.ENOATTR);
-  });
-
-  it('should include all expected properties by default', function() {
-    var err = new Filer.Errors.ENOENT();
-    expect(err.name).to.equal('ENOENT');
-    expect(err.code).to.equal('ENOENT');
-    expect(err.errno).to.equal(34);
-    expect(err.message).to.equal('no such file or directory');
-  });
-
-  it('should include extra properties when provided', function() {
-    var err = new Filer.Errors.ENOENT('This is the message', '/this/is/the/path');
-    expect(err.name).to.equal('ENOENT');
-    expect(err.code).to.equal('ENOENT');
-    expect(err.errno).to.equal(34);
-    expect(err.message).to.equal('This is the message');
-    expect(err.path).to.equal('/this/is/the/path');
-  });
-
-  it('should include default message and path info when provided', function() {
-    var err = new Filer.Errors.ENOENT(null, '/this/is/the/path');
-    expect(err.message).to.equal('no such file or directory');
-    expect(err.path).to.equal('/this/is/the/path');
-  });
-
-  it('should include just the message when no path provided', function() {
-    var err = new Filer.Errors.ENOENT();
-    expect(err.message).to.equal('no such file or directory');
-    expect(err.path).not.to.exist;
-  });
-
-  it('should not include path in toString() when not provided', function() {
-    var err = new Filer.Errors.ENOENT('This is the message');
-    expect(err.toString()).to.equal("ENOENT: This is the message");
-  });
-
-  it('should include path in toString() when provided', function() {
-    var err = new Filer.Errors.ENOENT(null, '/this/is/the/path');
-    expect(err.toString()).to.equal("ENOENT: no such file or directory, '/this/is/the/path'");
-  });
-
-  it('should include message and path info when provided', function() {
-    var err = new Filer.Errors.ENOENT('This is the message', '/this/is/the/path');
-    expect(err.message).to.equal('This is the message');
-    expect(err.path).to.equal('/this/is/the/path');
-  });
-});
-
-},{"../..":59,"chai":10}],90:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe("Filer.FileSystem", function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should properly mount new or existing filesystem', function(done) {
-    var provider = util.provider().provider;
-
-    // 1) Should be able to open a new filesystem, and get empty root
-    var fs1 = new Filer.FileSystem({provider: provider}, function() {
-      fs1.readdir('/', function(err, entries) {
-        expect(err).not.to.exist;
-        expect(entries).to.be.an('array');
-        expect(entries.length).to.equal(0);
-
-        fs1.writeFile('/file', 'data', function(err) {
-          if(err) throw err;
-
-          // 2) Should be able to open an existing filesystem
-          var fs2 = new Filer.FileSystem({provider: provider}, function() {
-            fs2.readdir('/', function(err, entries) {
-              expect(err).not.to.exist;
-              expect(entries).to.be.an('array');
-              expect(entries.length).to.equal(1);
-              expect(entries[0]).to.equal('file');
-
-
-              // 3) FORMAT flag should wipe an existing filesystem
-              var fs3 = new Filer.FileSystem({provider: provider, flags: ['FORMAT']}, function() {
-                fs3.readdir('/', function(err, entries) {
-                  expect(err).not.to.exist;
-                  expect(entries).to.be.an('array');
-                  expect(entries.length).to.equal(0);
-                  done();
-                });
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],91:[function(require,module,exports){
-var Filer = require('../..');
-var expect = require('chai').expect;
-
-describe("Filer", function() {
-  it("is defined", function() {
-    expect(typeof Filer).not.to.equal(undefined);
-  });
-
-  it("has FileSystem constructor", function() {
-    expect(typeof Filer.FileSystem).to.equal('function');
-  });
-
-  it("has Shell constructor", function() {
-    expect(typeof Filer.Shell).to.equal('function');
-  });
-});
-
-},{"../..":59,"chai":10}],92:[function(require,module,exports){
-(function (Buffer){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.appendFile', function() {
-  beforeEach(function(done) {
-    util.setup(function() {
-      var fs = util.fs();
-      fs.writeFile('/myfile', "This is a file.", { encoding: 'utf8' }, function(error) {
-        if(error) throw error;
-        done();
-      });
-    });
-  });
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.appendFile).to.be.a('function');
-  });
-
-  it('should append a utf8 file without specifying utf8 in appendFile', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-    var more = " Appended.";
-
-    fs.appendFile('/myfile', more, function(error) {
-      if(error) throw error;
-
-      fs.readFile('/myfile', 'utf8', function(error, data) {
-        expect(error).not.to.exist;
-        expect(data).to.equal(contents + more);
-        done();
-      });
-    });
-  });
-
-  it('should append a utf8 file with "utf8" option to appendFile', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-    var more = " Appended.";
-
-    fs.appendFile('/myfile', more, 'utf8', function(error) {
-      if(error) throw error;
-
-      fs.readFile('/myfile', 'utf8', function(error, data) {
-        expect(error).not.to.exist;
-        expect(data).to.equal(contents + more);
-        done();
-      });
-    });
-  });
-
-  it('should append a utf8 file with {encoding: "utf8"} option to appendFile', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-    var more = " Appended.";
-
-    fs.appendFile('/myfile', more, { encoding: 'utf8' }, function(error) {
-      if(error) throw error;
-
-      fs.readFile('/myfile', { encoding: 'utf8' }, function(error, data) {
-        expect(error).not.to.exist;
-        expect(data).to.equal(contents + more);
-        done();
-      });
-    });
-  });
-
-  it('should append a binary file', function(done) {
-    var fs = util.fs();
-
-    // String and utf8 binary encoded versions of the same thing:
-    var contents = "This is a file.";
-    var binary = new Buffer([84, 104, 105, 115, 32, 105, 115, 32, 97, 32, 102, 105, 108, 101, 46]);
-    var more = " Appended.";
-    var binary2 = new Buffer([32, 65, 112, 112, 101, 110, 100, 101, 100, 46]);
-    var binary3 = new Buffer([84, 104, 105, 115, 32, 105, 115, 32, 97, 32, 102, 105, 108, 101, 46,
-                              32, 65, 112, 112, 101, 110, 100, 101, 100, 46]);
-
-    fs.writeFile('/mybinaryfile', binary, function(error) {
-      if(error) throw error;
-
-      fs.appendFile('/mybinaryfile', binary2, function(error) {
-        if(error) throw error;
-
-        fs.readFile('/mybinaryfile', 'ascii', function(error, data) {
-          expect(error).not.to.exist;
-          expect(data).to.deep.equal(binary3);
-          done();
-        });
-      });
-    });
-  });
-
-  it('should follow symbolic links', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-    var more = " Appended.";
-
-    fs.symlink('/myfile', '/myFileLink', function (error) {
-      if (error) throw error;
-
-      fs.appendFile('/myFileLink', more, 'utf8', function (error) {
-        if (error) throw error;
-
-        fs.readFile('/myFileLink', 'utf8', function(error, data) {
-          expect(error).not.to.exist;
-          expect(data).to.equal(contents + more);
-          done();
-        });
-      });
-    });
-  });
-
-  it('should work when file does not exist, and create the file', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-
-    fs.appendFile('/newfile', contents, { encoding: 'utf8' }, function(error) {
-      expect(error).not.to.exist;
-
-      fs.readFile('/newfile', 'utf8', function(err, data) {
-        if(err) throw err;
-        expect(data).to.equal(contents);
-        done();
-      });
-    });
-  });
-});
-
-}).call(this,require("buffer").Buffer)
-},{"../..":59,"../lib/test-utils.js":87,"buffer":8,"chai":10}],93:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.close', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(typeof fs.close).to.equal('function');
-  });
-
-  it('should release the file descriptor', function(done) {
-    var buffer = new Filer.Buffer(0);
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w+', function(error, result) {
-      if(error) throw error;
-
-      var fd = result;
-      fs.close(fd, function(error) {
-        fs.read(fd, buffer, 0, buffer.length, undefined, function(error, result) {
-          expect(error).to.exist;
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],94:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.exists', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(typeof fs.exists).to.equal('function');
-  });
-
-  it('should return false if path does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.exists('/tmp', function(result) {
-      expect(result).to.be.false;
-      done();
-    });
-  });
-
-  it('should return true if path exists', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w', function(err, fd) {
-      if(err) throw err;
-
-      fs.close(fd, function(err) {
-        if(err) throw err;
-
-        fs.exists('/myfile', function(result) {
-          expect(result).to.be.true;
-          done();
-        });
-      });
-    });
-  });
-
-  it('should follow symbolic links and return true for the resulting path', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w', function(error, fd) {
-      if(error) throw error;
-
-      fs.close(fd, function(error) {
-        if(error) throw error;
-
-        fs.symlink('/myfile', '/myfilelink', function(error) {
-          if(error) throw error;
-
-          fs.exists('/myfilelink', function(result) {
-            expect(result).to.be.true;
-            done();
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],95:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.link', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.link).to.be.a('function');
-  });
-
-  it('should create a link to an existing file', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w+', function(error, fd) {
-      if(error) throw error;
-
-      fs.close(fd, function(error) {
-        if(error) throw error;
-
-        fs.link('/myfile', '/myotherfile', function(error) {
-          if(error) throw error;
-
-          fs.stat('/myfile', function(error, result) {
-            if(error) throw error;
-
-            var _oldstats = result;
-            fs.stat('/myotherfile', function(error, result) {
-              expect(error).not.to.exist;
-              expect(result.nlinks).to.equal(2);
-              expect(result.dev).to.equal(_oldstats.dev);
-              expect(result.node).to.equal(_oldstats.node);
-              expect(result.size).to.equal(_oldstats.size);
-              expect(result.type).to.equal(_oldstats.type);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should create hard link to identical data node', function(done) {
-    var fs = util.fs();
-    var contents = "Hello World!";
-
-    fs.writeFile('/file', contents, function(err) {
-      if(err) throw err;
-
-      fs.link('/file', '/hlink', function(err) {
-        if(err) throw err;
-
-        fs.readFile('/file', 'utf8', function(err, fileData) {
-          if(err) throw err;
-
-          fs.readFile('/hlink', 'utf8', function(err, hlinkData) {
-            if(err) throw err;
-
-            expect(fileData).to.equal(hlinkData);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should not follow symbolic links', function(done) {
-    var fs = util.fs();
-
-    fs.stat('/', function (error, result) {
-      if (error) throw error;
-      var _oldstats = result;
-      fs.symlink('/', '/myfileLink', function (error) {
-        if (error) throw error;
-        fs.link('/myfileLink', '/myotherfile', function (error) {
-          if (error) throw error;
-          fs.lstat('/myfileLink', function (error, result) {
-            if (error) throw error;
-            var _linkstats = result;
-            fs.lstat('/myotherfile', function (error, result) {
-              expect(error).not.to.exist;
-              expect(result.dev).to.equal(_linkstats.dev);
-              expect(result.node).to.equal(_linkstats.node);
-              expect(result.size).to.equal(_linkstats.size);
-              expect(result.type).to.equal(_linkstats.type);
-              expect(result.nlinks).to.equal(2);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should not allow links to a directory', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/mydir', function(error) {
-      if(error) throw error;
-
-      fs.link('/mydir', '/mydirlink', function(error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EPERM');
-        done();
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],96:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.lseek', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.lseek).to.be.a('function');
-  });
-
-  it('should not follow symbolic links', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w', function (error, fd) {
-      if (error) throw error;
-
-      fs.close(fd, function (error) {
-        if (error) throw error;
-
-        fs.symlink('/myfile', '/myFileLink', function (error) {
-          if (error) throw error;
-
-          fs.rename('/myFileLink', '/myOtherFileLink', function (error) {
-            if (error) throw error;
-
-            fs.stat('/myfile', function (error, result) {
-              expect(error).not.to.exist;
-
-              fs.lstat('/myFileLink', function (error, result) {
-                expect(error).to.exist;
-
-                fs.stat('/myOtherFileLink', function (error, result) {
-                  if (error) throw error;
-                  expect(result.nlinks).to.equal(1);
-                  done();
-                });
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should set the current position if whence is SET', function(done) {
-    var fs = util.fs();
-    var offset = 3;
-    var buffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-    var result_buffer = new Filer.Buffer(buffer.length + offset);
-    result_buffer.fill(0);
-
-    fs.open('/myfile', 'w+', function(error, fd) {
-      if(error) throw error;
-
-      fs.write(fd, buffer, 0, buffer.length, undefined, function(error, result) {
-        if(error) throw error;
-
-        fs.lseek(fd, offset, 'SET', function(error, result) {
-          expect(error).not.to.exist;
-          expect(result).to.equal(offset);
-
-          fs.write(fd, buffer, 0, buffer.length, undefined, function(error, result) {
-            if(error) throw error;
-
-            fs.read(fd, result_buffer, 0, result_buffer.length, 0, function(error, result) {
-              if(error) throw error;
-
-              fs.stat('/myfile', function(error, result) {
-                if(error) throw error;
-
-                expect(result.size).to.equal(offset + buffer.length);
-                var expected = new Filer.Buffer([1, 2, 3, 1, 2, 3, 4, 5, 6, 7, 8]);
-                expect(result_buffer).to.deep.equal(expected);
-                done();
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should update the current position if whence is CUR', function(done) {
-    var fs = util.fs();
-    var offset = -2;
-    var buffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-    var result_buffer = new Filer.Buffer(2 * buffer.length + offset);
-    result_buffer.fill(0);
-
-    fs.open('/myfile', 'w+', function(error, fd) {
-      if(error) throw error;
-
-      fs.write(fd, buffer, 0, buffer.length, undefined, function(error, result) {
-        if(error) throw error;
-
-        fs.lseek(fd, offset, 'CUR', function(error, result) {
-          expect(error).not.to.exist;
-          expect(result).to.equal(offset + buffer.length);
-
-          fs.write(fd, buffer, 0, buffer.length, undefined, function(error, result) {
-            if(error) throw error;
-
-            fs.read(fd, result_buffer, 0, result_buffer.length, 0, function(error, result) {
-              if(error) throw error;
-
-              fs.stat('/myfile', function(error, result) {
-                if(error) throw error;
-
-                expect(result.size).to.equal(offset + 2 * buffer.length);
-                var expected = new Filer.Buffer([1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 7, 8]);
-                expect(result_buffer).to.deep.equal(expected);
-                done();
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should update the current position if whence is END', function(done) {
-    var fs = util.fs();
-    var offset = 5;
-    var buffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-    var result_buffer;
-
-    fs.open('/myfile', 'w+', function(error, result) {
-      if(error) throw error;
-
-      var fd1 = result;
-      fs.write(fd1, buffer, 0, buffer.length, undefined, function(error, result) {
-        if(error) throw error;
-
-        fs.open('/myfile', 'w+', function(error, result) {
-          if(error) throw error;
-
-          var fd2 = result;
-          fs.lseek(fd2, offset, 'END', function(error, result) {
-            expect(error).not.to.exist;
-            expect(result).to.equal(offset + buffer.length);
-
-            fs.write(fd2, buffer, 0, buffer.length, undefined, function(error, result) {
-              if(error) throw error;
-
-              fs.stat('/myfile', function(error, result) {
-                if(error) throw error;
-
-                expect(result.size).to.equal(offset + 2 * buffer.length);
-                result_buffer = new Filer.Buffer(result.size);
-                result_buffer.fill(0);
-                fs.read(fd2, result_buffer, 0, result_buffer.length, 0, function(error, result) {
-                  if(error) throw error;
-                  var expected = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8]);
-                  expect(result_buffer).to.deep.equal(expected);
-                  done();
-                });
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],97:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.lstat', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(typeof fs.lstat).to.equal('function');
-  });
-
-  it('should return an error if path does not exist', function(done) {
-    var fs = util.fs();
-    var _error, _result;
-
-    fs.lstat('/tmp', function(error, result) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      expect(result).not.to.exist;
-      done();
-    });
-  });
-
-  it('should return a stat object if path is not a symbolic link', function(done) {
-    var fs = util.fs();
-
-    fs.lstat('/', function(error, result) {
-      expect(error).not.to.exist;
-      expect(result).to.exist;
-      expect(result.type).to.equal('DIRECTORY');
-      done();
-    });
-  });
-
-  it('should return a stat object if path is a symbolic link', function(done) {
-    var fs = util.fs();
-
-    fs.symlink('/', '/mylink', function(error) {
-      if(error) throw error;
-
-      fs.lstat('/mylink', function(error, result) {
-        expect(error).not.to.exist;
-        expect(result).to.exist;
-        expect(result.type).to.equal('SYMLINK');
-        done();
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],98:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.mkdir', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.mkdir).to.be.a('function');
-  });
-
-  it('should return an error if part of the parent path does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp/mydir', function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      done();
-    });
-  });
-
-  it('should return an error if the path already exists', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/', function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("EEXIST");
-      done();
-    });
-  });
-
-  it('should make a new directory', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function(error) {
-      expect(error).not.to.exist;
-      if(error) throw error;
-
-      fs.stat('/tmp', function(error, stats) {
-        expect(error).not.to.exist;
-        expect(stats).to.exist;
-        expect(stats.type).to.equal('DIRECTORY');
-        done();
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],99:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.mknod', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function(done) {
-    var fs = util.fs();
-    expect(fs.mknod).to.be.a('function');
-    done();
-  });
-
-  it('should return an error if part of the parent path does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.mknod('/dir/mydir', 'DIRECTORY', function(error) {
-      expect(error.code).to.equal('ENOENT');
-      done();
-    });
-  });
-
-  it('should return an error if path already exists', function(done) {
-    var fs = util.fs();
-
-    fs.mknod('/', 'DIRECTORY', function(error) {
-      expect(error.code).to.equal('EEXIST');
-      done();
-    });
-  });
-
-  it('should return an error if the parent node is not a directory', function(done) {
-    var fs = util.fs();
-
-    fs.mknod('/file', 'FILE' , function(error, result) {
-      if(error) throw error;
-      fs.mknod('/file/myfile', 'FILE', function(error, result) {
-        expect(error.code).to.equal('ENOTDIR');
-        done();
-      });
-    });
-  });
-
-  it('should return an error if the mode provided is not DIRECTORY or FILE', function(done) {
-    var fs = util.fs();
-
-    fs.mknod('/symlink', 'SYMLINK', function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal('EINVAL');
-      done();
-    });
-  });
-
-  it('should make a new directory', function(done) {
-    var fs = util.fs();
-
-    fs.mknod('/dir', 'DIRECTORY', function(error) {
-      if(error) throw error;
-
-      fs.stat('/dir', function(error, stats) {
-        expect(error).not.to.exist;
-        expect(stats.type).to.equal('DIRECTORY');
-        done();
-      });
-    });
-  });
-
-  it('should make a new file', function(done) {
-    var fs = util.fs();
-
-    fs.mknod('/file', 'FILE' , function(error, result) {
-      if(error) throw error;
-      fs.stat('/file', function(error, result) {
-        expect(error).not.to.exist;
-        expect(result.type).to.equal('FILE');
-        done();
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],100:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-var constants = require('../../src/constants.js');
-
-describe('fs.open', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.open).to.be.a('function');
-  });
-
-  it('should return an error if the parent path does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.open('/tmp/myfile', 'w+', function(error, result) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      expect(result).not.to.exist;
-      done();
-    });
-  });
-
-  it('should return an error when flagged for read and the path does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'r+', function(error, result) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      expect(result).not.to.exist;
-      done();
-    });
-  });
-
-  it('should return an error when flagged for write and the path is a directory', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function(error) {
-      if(error) throw error;
-      fs.open('/tmp', 'w', function(error, result) {
-        expect(error).to.exist;
-        expect(error.code).to.equal("EISDIR");
-        expect(result).not.to.exist;
-        done();
-      });
-    });
-  });
-
-  it('should return an error when flagged for append and the path is a directory', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function(error) {
-      if(error) throw error;
-      fs.open('/tmp', 'a', function(error, result) {
-        expect(error).to.exist;
-        expect(error.code).to.equal("EISDIR");
-        expect(result).not.to.exist;
-        done();
-      });
-    });
-  });
-
-  it('should return a unique file descriptor', function(done) {
-    var fs = util.fs();
-    var fd1;
-
-    fs.open('/file1', 'w+', function(error, fd) {
-      if(error) throw error;
-      expect(error).not.to.exist;
-      expect(fd).to.be.a('number');
-
-      fs.open('/file2', 'w+', function(error, fd) {
-        if(error) throw error;
-        expect(error).not.to.exist;
-        expect(fd).to.be.a('number');
-        expect(fd).not.to.equal(fd1);
-        done();
-      });
-    });
-  });
-
-  it('should return the argument value of the file descriptor index matching the value set by the first useable file descriptor constant', function(done) {
-    var fs = util.fs();
-    var firstFD = constants.FIRST_DESCRIPTOR;
-    var fd1;
-
-    fs.open('/file1', 'w+', function(error, fd) {
-      if(error) throw error;
-      expect(fd).to.equal(firstFD);
-      done();
-    });
-  });
-
-  it('should create a new file when flagged for write', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-      fs.stat('/myfile', function(error, result) {
-        expect(error).not.to.exist;
-        expect(result).to.exist;
-        expect(result.type).to.equal('FILE');
-        done();
-      });
-    });
-  });
-
-  /**
-   * This test is currently correct per our code, but incorrect according to the spec.
-   * When we fix https://github.com/filerjs/filer/issues/314 we'll have to update this.
-   */
-  it('should error if an ofd\'s node goes away while open', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/myfile', 'data', function(error) {
-      if(error) throw error;
-
-      fs.open('/myfile', 'r', function(error, fd) {
-        if(error) throw error;
-
-        // Delete the file while it's still open
-        fs.unlink('/myfile', function(error) {
-          if(error) throw error;
-
-          // This should fail now, since fd points to a bad node
-          fs.fstat(fd, function(error, result) {
-            expect(error).to.exist;
-            expect(error.code).to.equal('EBADF');
-            expect(result).not.to.exist;
-
-            fs.close(fd);
-            done();
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../../src/constants.js":52,"../lib/test-utils.js":87,"chai":10}],101:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.read', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.read).to.be.a('function');
-  });
-
-  it('should read data from a file', function(done) {
-    var fs = util.fs();
-    var wbuffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-    var rbuffer = new Filer.Buffer(wbuffer.length);
-    rbuffer.fill(0);
-
-    fs.open('/myfile', 'w+', function(error, fd) {
-      if(error) throw error;
-      fs.write(fd, wbuffer, 0, wbuffer.length, 0, function(error, result) {
-        if(error) throw error;
-
-        fs.read(fd, rbuffer, 0, rbuffer.length, 0, function(error, result) {
-          expect(error).not.to.exist;
-          expect(result).to.equal(rbuffer.length);
-          expect(wbuffer).to.deep.equal(rbuffer);
-          done();
-        });
-      });
-    });
-  });
-
-  it('should update the current file position', function(done) {
-    var fs = util.fs();
-    var wbuffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-    var rbuffer = new Filer.Buffer(wbuffer.length);
-    rbuffer.fill(0);
-    var _result = 0;
-
-    fs.open('/myfile', 'w+', function(error, fd) {
-      if(error) throw error;
-
-      fs.write(fd, wbuffer, 0, wbuffer.length, 0, function(error, result) {
-        if(error) throw error;
-
-        fs.read(fd, rbuffer, 0, rbuffer.length / 2, undefined, function(error, result) {
-          if(error) throw error;
-
-          _result += result;
-          fs.read(fd, rbuffer, rbuffer.length / 2, rbuffer.length, undefined, function(error, result) {
-            if(error) throw error;
-            _result += result;
-            expect(error).not.to.exist;
-            expect(_result).to.equal(rbuffer.length);
-            expect(wbuffer).to.deep.equal(rbuffer);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should fail to read a directory', function(done) {
-    var fs = util.fs();
-    var buf = new Filer.Buffer(20);
-    var buf2 = new Filer.Buffer(20);
-    buf.fill(0);
-    buf2.fill(0);
-
-    fs.mkdir('/mydir', function(error) {
-      if(error) throw err;
-
-      fs.open('/mydir', 'r', function(error, fd) {
-        if(error) throw error;
-
-        fs.read(fd, buf, 0, buf.length, 0, function(error, result) {
-          expect(error).to.exist;
-          expect(error.code).to.equal('EISDIR');
-          expect(result).to.equal(0);
-          expect(buf).to.deep.equal(buf2);
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],102:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.readdir', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.readdir).to.be.a('function');
-  });
-
-  it('should return an error if the path does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.readdir('/tmp/mydir', function(error, files) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      expect(files).not.to.exist;
-      done();
-    });
-  });
-
-  it('should return a list of files from an existing directory', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function(error) {
-      if(error) throw error;
-
-      fs.readdir('/', function(error, files) {
-        expect(error).not.to.exist;
-        expect(files).to.exist;
-        expect(files.length).to.equal(1);
-        expect(files[0]).to.equal('tmp');
-        done();
-      });
-    });
-  });
-
-  it('should follow symbolic links', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function(error) {
-      if(error) throw error;
-      fs.symlink('/', '/tmp/dirLink', function(error) {
-        if(error) throw error;
-        fs.readdir('/tmp/dirLink', function(error, files) {
-          expect(error).not.to.exist;
-          expect(files).to.exist;
-          expect(files.length).to.equal(1);
-          expect(files[0]).to.equal('tmp');
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],103:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.readlink', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.readlink).to.be.a('function');
-  });
-
-  it('should return an error if part of the parent destination path does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.readlink('/tmp/mydir', function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      done();
-    });
-  });
-
-  it('should return an error if the path is not a symbolic link', function(done) {
-    var fs = util.fs();
-
-    fs.readlink('/', function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      done();
-    });
-  });
-
-  it('should return the contents of a symbolic link', function(done) {
-    var fs = util.fs();
-
-    fs.symlink('/', '/myfile', function(error) {
-      if(error) throw error;
-
-      fs.readlink('/myfile', function(error, result) {
-        expect(error).not.to.exist;
-        expect(result).to.equal('/');
-        done();
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],104:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.rename', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.rename).to.be.a('function');
-  });
-
-  it('should rename an existing file', function(done) {
-    var complete1 = false;
-    var complete2 = false;
-    var fs = util.fs();
-
-    function maybeDone() {
-      if(complete1 && complete2) {
-        done();
-      }
-    }
-
-    fs.open('/myfile', 'w+', function(error, fd) {
-      if(error) throw error;
-
-      fs.close(fd, function(error) {
-        if(error) throw error;
-
-        fs.rename('/myfile', '/myotherfile', function(error) {
-          if(error) throw error;
-
-          fs.stat('/myfile', function(error, result) {
-            expect(error).to.exist;
-            complete1 = true;
-            maybeDone();
-          });
-
-          fs.stat('/myotherfile', function(error, result) {
-            expect(error).not.to.exist;
-            expect(result.nlinks).to.equal(1);
-            complete2 = true;
-            maybeDone();
-          });
-        });
-      });
-    });
-  });
-
-  it('should rename an existing directory', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/mydir', function(error) {
-      if(error) throw error;
-
-      fs.rename('/mydir', '/myotherdir', function(error) {
-        expect(error).not.to.exist;
-        fs.stat('/mydir', function(error) {
-          expect(error).to.exist;
-          expect(error.code).to.equal('ENOENT');
-
-          fs.stat('/myotherdir', function(error, result) {
-            expect(error).not.to.exist;
-            expect(result.nlinks).to.equal(1);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should rename an existing directory if the new path points to an existing directory', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/mydir', function(error) {
-      if(error) throw error;
-
-      fs.mkdir('/myotherdir', function(error) {
-        if(error) throw error;
-
-        fs.rename('/mydir', '/myotherdir', function(error) {
-          expect(error).not.to.exist;
-          fs.stat('/mydir', function(error) {
-            expect(error).to.exist;
-            expect(error.code).to.equal('ENOENT');
-
-            fs.stat('/myotherdir', function(error, result) {
-              expect(error).not.to.exist;
-              expect(result.nlinks).to.equal(1);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should fail to rename an existing directory if the new path points to an existing directory that is not empty', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/mydir', function(error) {
-      if(error) throw error;
-
-      fs.mkdir('/myotherdir', function(error) {
-        if(error) throw error;
-
-        fs.writeFile('/myotherdir/myfile', 'This is a file', function(error) {
-          if(error) throw error;
-
-          fs.rename('/mydir', '/myotherdir', function(error) {
-            expect(error).to.exist;
-            expect(error.code).to.equal('ENOTEMPTY');
-
-            fs.stat('/mydir', function(error) {
-              expect(error).not.to.exist;
-
-              fs.stat('/myotherdir', function(error) {
-                expect(error).not.to.exist;
-                done();
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should fail to rename an existing directory if the new path points to an existing file', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/mydir', function(error) {
-      if(error) throw error;
-
-      fs.writeFile('/myfile', 'This is a file', function(error) {
-        if(error) throw error;
-
-        fs.rename('/mydir', '/myfile', function(error) {
-          expect(error).to.exist;
-          expect(error.code).to.equal('ENOTDIR');
-
-          fs.stat('/mydir', function(error) {
-            expect(error).not.to.exist;
-
-            fs.stat('/myfile', function(error) {
-              expect(error).not.to.exist;
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],105:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.rmdir', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.rmdir).to.be.a('function');
-  });
-
-  it('should return an error if the path does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.rmdir('/tmp/mydir', function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      done();
-    });
-  });
-
-  it('should return an error if attempting to remove the root directory', function(done) {
-    var fs = util.fs();
-
-    fs.rmdir('/', function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("EBUSY");
-      done();
-    });
-  });
-
-  it('should return an error if the directory is not empty', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function(error) {
-      if(error) throw error;
-      fs.mkdir('/tmp/mydir', function(error) {
-        if(error) throw error;
-        fs.rmdir('/', function(error) {
-          expect(error).to.exist;
-          expect(error.code).to.equal("EBUSY");
-          done();
-        });
-      });
-    });
-  });
-
-  it('should return an error if the path is not a directory', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function(error) {
-      if(error) throw error;
-      fs.open('/tmp/myfile', 'w', function(error, fd) {
-        if(error) throw error;
-        fs.close(fd, function(error) {
-          if(error) throw error;
-          fs.rmdir('/tmp/myfile', function(error) {
-            expect(error).to.exist;
-            expect(error.code).to.equal("ENOTDIR");
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should return an error if the path is a symbolic link', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function (error) {
-      if(error) throw error;
-      fs.symlink('/tmp', '/tmp/myfile', function (error) {
-        if(error) throw error;
-        fs.rmdir('/tmp/myfile', function (error) {
-          expect(error).to.exist;
-          expect(error.code).to.equal("ENOTDIR");
-          done();
-        });
-      });
-    });
-  });
-
-  it('should remove an existing directory', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/tmp', function(error) {
-      if(error) throw error;
-      fs.rmdir('/tmp', function(error) {
-        expect(error).not.to.exist;
-        if(error) throw error;
-        fs.stat('/tmp', function(error, stats) {
-          expect(error).to.exist;
-          expect(stats).not.to.exist;
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],106:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe("fs.Shell", function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it("is a function", function(done) {
-    var fs = util.fs();
-    expect(typeof fs.Shell).to.equal('function');
-
-    done();
-  });
-
-  it('should return a FileSystemShell instance', function(done) {
-    var fs = util.fs();
-    var sh = new fs.Shell();
-
-    expect(sh.prototype).to.deep.equal((new Filer.Shell(fs)).prototype);
-    done();
-  });
-
-  it('should reflect changes to the prototype', function(done){
-    var fs = util.fs();
-    var sh = new fs.Shell();
-
-    Filer.Shell.prototype.test = "foo";
-
-    expect(sh.test).to.equal("foo");
-    done();
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],107:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe("fs", function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it("is an object", function() {
-    var fs = util.fs();
-    expect(typeof fs).to.equal('object');
-    expect(fs).to.be.an.instanceof(Filer.FileSystem);
-  });
-
-  it('should have a root directory', function(done) {
-    var fs = util.fs();
-    fs.stat('/', function(error, result) {
-      expect(error).not.to.exist;
-      expect(result).to.exist;
-      expect(result.type).to.equal('DIRECTORY');
-      done();
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],108:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.stat', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(typeof fs.stat).to.equal('function');
-  });
-
-  it('should return an error if path does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.stat('/tmp', function(error, result) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      expect(result).not.to.exist;
-      done();
-    });
-  });
-
-  it('should return a stat object if path exists', function(done) {
-    var fs = util.fs();
-
-    fs.stat('/', function(error, result) {
-      expect(error).not.to.exist;
-      expect(result).to.exit;
-
-      expect(result['node']).to.be.a('string');
-      expect(result['dev']).to.equal(fs.name);
-      expect(result['size']).to.be.a('number');
-      expect(result['nlinks']).to.be.a('number');
-      expect(result['atime']).to.be.a('number');
-      expect(result['mtime']).to.be.a('number');
-      expect(result['ctime']).to.be.a('number');
-      expect(result['type']).to.equal('DIRECTORY');
-
-      done();
-    });
-  });
-
-  it('should follow symbolic links and return a stat object for the resulting path', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-      var fd = result;
-      fs.close(fd, function(error) {
-        if(error) throw error;
-        fs.stat('/myfile', function(error, result) {
-          if(error) throw error;
-
-          expect(result['node']).to.exist;
-          fs.symlink('/myfile', '/myfilelink', function(error) {
-            if(error) throw error;
-
-            fs.stat('/myfilelink', function(error, result) {
-              expect(error).not.to.exist;
-              expect(result).to.exist;
-              expect(result['node']).to.exist;
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should return a stat object for a valid descriptor', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w+', function(error, fd) {
-      if(error) throw error;
-
-      fs.fstat(fd, function(error, result) {
-        expect(error).not.to.exist;
-        expect(result).to.exist;
-
-        expect(result['node']).to.exist;
-        expect(result['dev']).to.equal(fs.name);
-        expect(result['size']).to.be.a('number');
-        expect(result['nlinks']).to.be.a('number');
-        expect(result['atime']).to.be.a('number');
-        expect(result['mtime']).to.be.a('number');
-        expect(result['ctime']).to.be.a('number');
-        expect(result['type']).to.equal('FILE');
-
-        done();
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],109:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.stats', function() {
-  describe('#isFile()', function() {
-    beforeEach(util.setup);
-    afterEach(util.cleanup);
-
-    it('should be a function', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isFile).to.be.a('function');
-        done();
-      });
-    });
-
-    it('should return true if stats are for file', function(done) {
-      var fs = util.fs();
-
-      fs.open('/myfile', 'w+', function(error, fd) {
-        if(error) throw error;
-        fs.fstat(fd, function(error, stats) {
-          expect(stats.isFile()).to.be.true;
-          done();
-        });
-      });
-    });
-
-    it('should return false if stats are for directory', function(done) {
-      var fs = util.fs();
-
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isFile()).to.be.false;
-        done();
-      });
-    });
-
-    it('should return false if stats are for symbolic link', function(done) {
-      var fs = util.fs();
-
-      fs.open('/myfile', 'w+', function(error, fd) {
-        if(error) throw error;
-        fs.close(fd, function(error, stats) {
-          if(error) throw error;
-          fs.symlink('/myfile', '/myfilelink', function(error) {
-            if(error) throw error;
-            fs.lstat('/myfilelink', function(error, stats) {
-              expect(stats.isFile()).to.be.false;
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  describe('#isDirectory()', function() {
-    beforeEach(util.setup);
-    afterEach(util.cleanup);
-
-    it('should be a function', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isDirectory).to.be.a('function');
-        done();
-      });
-    });
-
-    it('should return false if stats are for file', function(done) {
-      var fs = util.fs();
-
-      fs.open('/myfile', 'w+', function(error, fd) {
-        if(error) throw error;
-        fs.fstat(fd, function(error, stats) {
-          expect(stats.isDirectory()).to.be.false;
-          done();
-        });
-      });
-    });
-
-    it('should return true if stats are for directory', function(done) {
-      var fs = util.fs();
-
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isDirectory()).to.be.true;
-        done();
-      });
-    });
-
-    it('should return false if stats are for symbolic link', function(done) {
-      var fs = util.fs();
-
-      fs.open('/myfile', 'w+', function(error, fd) {
-        if(error) throw error;
-        fs.close(fd, function(error, stats) {
-          if(error) throw error;
-          fs.symlink('/myfile', '/myfilelink', function(error) {
-            if(error) throw error;
-            fs.lstat('/myfilelink', function(error, stats) {
-              expect(stats.isDirectory()).to.be.false;
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  describe('#isBlockDevice()', function() {
-    beforeEach(util.setup);
-    afterEach(util.cleanup);
-
-    it('should be a function', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isBlockDevice).to.be.a('function');
-        done();
-      });
-    });
-
-    it('should return false', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isBlockDevice()).to.be.false;
-        done();
-      });
-    });
-  });
-
-  describe('#isCharacterDevice()', function() {
-    beforeEach(util.setup);
-    afterEach(util.cleanup);
-
-    it('should be a function', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isCharacterDevice).to.be.a('function');
-        done();
-      });
-    });
-
-    it('should return false', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isCharacterDevice()).to.be.false;
-        done();
-      });
-    });
-  });
-
-  describe('#isSymbolicLink()', function() {
-    beforeEach(util.setup);
-    afterEach(util.cleanup);
-
-    it('should be a function', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isSymbolicLink).to.be.a('function');
-        done();
-      });
-    });
-
-    it('should return false if stats are for file', function(done) {
-      var fs = util.fs();
-
-      fs.open('/myfile', 'w+', function(error, fd) {
-        if(error) throw error;
-        fs.fstat(fd, function(error, stats) {
-          expect(stats.isSymbolicLink()).to.be.false;
-          done();
-        });
-      });
-    });
-
-    it('should return false if stats are for directory', function(done) {
-      var fs = util.fs();
-
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isSymbolicLink()).to.be.false;
-        done();
-      });
-    });
-
-    it('should return true if stats are for symbolic link', function(done) {
-      var fs = util.fs();
-
-      fs.open('/myfile', 'w+', function(error, fd) {
-        if(error) throw error;
-        fs.close(fd, function(error, stats) {
-          if(error) throw error;
-          fs.symlink('/myfile', '/myfilelink', function(error) {
-            if(error) throw error;
-            fs.lstat('/myfilelink', function(error, stats) {
-              expect(stats.isSymbolicLink()).to.be.true;
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  describe('#isFIFO()', function() {
-    beforeEach(util.setup);
-    afterEach(util.cleanup);
-
-    it('should be a function', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isFIFO).to.be.a('function');
-        done();
-      });
-    });
-
-    it('should return false', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isFIFO()).to.be.false;
-        done();
-      });
-    });
-  });
-
-  describe('#isSocket()', function() {
-    beforeEach(util.setup);
-    afterEach(util.cleanup);
-
-    it('should be a function', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isSocket).to.be.a('function');
-        done();
-      });
-    });
-
-    it('should return false', function(done) {
-      var fs = util.fs();
-      fs.stat('/', function(error, stats) {
-        if(error) throw error;
-        expect(stats.isSocket()).to.be.false;
-        done();
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],110:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.symlink', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.symlink).to.be.a('function');
-  });
-
-  it('should return an error if part of the parent destination path does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.symlink('/', '/tmp/mydir', function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      done();
-    });
-  });
-
-  it('should return an error if the destination path already exists', function(done) {
-    var fs = util.fs();
-
-    fs.symlink('/tmp', '/', function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("EEXIST");
-      done();
-    });
-  });
-
-  it('should create a symlink', function(done) {
-    var fs = util.fs();
-
-    fs.symlink('/', '/myfile', function(error) {
-      expect(error).not.to.exist;
-
-      fs.stat('/myfile', function(err, stats) {
-        expect(error).not.to.exist;
-        expect(stats.type).to.equal('DIRECTORY');
-        done();
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],111:[function(require,module,exports){
-(function (Buffer){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.truncate', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.truncate).to.be.a('function');
-  });
-
-  it('should error when length is negative', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-
-    fs.writeFile('/myfile', contents, function(error) {
-      if(error) throw error;
-
-      fs.truncate('/myfile', -1, function(error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal("EINVAL");
-        done();
-      });
-    });
-  });
-
-  it('should error when path is not a file', function(done) {
-    var fs = util.fs();
-
-    fs.truncate('/', 0, function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("EISDIR");
-      done();
-    });
-  });
-
-  it('should truncate a file', function(done) {
-    var fs = util.fs();
-    var buffer = new Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-    var truncated = new Buffer([1]);
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-
-      var fd = result;
-      fs.write(fd, buffer, 0, buffer.length, 0, function(error, result) {
-        if(error) throw error;
-
-        fs.close(fd, function(error) {
-          if(error) throw error;
-
-          fs.truncate('/myfile', 1, function(error) {
-            expect(error).not.to.exist;
-
-            fs.readFile('/myfile', function(error, result) {
-              if(error) throw error;
-
-              expect(result).to.deep.equal(truncated);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should pad a file with zeros when the length is greater than the file size', function(done) {
-    var fs = util.fs();
-    var buffer = new Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-    var truncated = new Buffer([1, 2, 3, 4, 5, 6, 7, 8, 0]);
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-
-      var fd = result;
-      fs.write(fd, buffer, 0, buffer.length, 0, function(error, result) {
-        if(error) throw error;
-
-        fs.close(fd, function(error) {
-          if(error) throw error;
-
-          fs.truncate('/myfile', 9, function(error) {
-            expect(error).not.to.exist;
-
-            fs.readFile('/myfile', function(error, result) {
-              if(error) throw error;
-
-              expect(result).to.deep.equal(truncated);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should update the file size', function(done) {
-    var fs = util.fs();
-    var buffer = new Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-
-      var fd = result;
-      fs.write(fd, buffer, 0, buffer.length, 0, function(error, result) {
-        if(error) throw error;
-
-        fs.close(fd, function(error) {
-          if(error) throw error;
-
-          fs.truncate('/myfile', 0, function(error) {
-            expect(error).not.to.exist;
-
-            fs.stat('/myfile', function(error, result) {
-              if(error) throw error;
-
-              expect(result.size).to.equal(0);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should truncate a valid descriptor', function(done) {
-    var fs = util.fs();
-    var buffer = new Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-
-      var fd = result;
-      fs.write(fd, buffer, 0, buffer.length, 0, function(error, result) {
-        if(error) throw error;
-
-        fs.ftruncate(fd, 0, function(error) {
-          expect(error).not.to.exist;
-
-          fs.fstat(fd, function(error, result) {
-            if(error) throw error;
-
-            expect(result.size).to.equal(0);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should follow symbolic links', function(done) {
-    var fs = util.fs();
-    var buffer = new Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-
-      var fd = result;
-      fs.write(fd, buffer, 0, buffer.length, 0, function(error, result) {
-        if(error) throw error;
-
-        fs.close(fd, function(error) {
-          if(error) throw error;
-
-          fs.symlink('/myfile', '/mylink', function(error) {
-            if(error) throw error;
-
-            fs.truncate('/mylink', 0, function(error) {
-              expect(error).not.to.exist;
-
-              fs.stat('/myfile', function(error, result) {
-                if(error) throw error;
-
-                expect(result.size).to.equal(0);
-                fs.lstat('/mylink', function(error, result) {
-                  if(error) throw error;
-
-                  expect(result.size).not.to.equal(0);
-                  done();
-                });
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-});
-
-}).call(this,require("buffer").Buffer)
-},{"../..":59,"../lib/test-utils.js":87,"buffer":8,"chai":10}],112:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.unlink', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.unlink).to.be.a('function');
-  });
-
-  it('should remove a link to an existing file', function(done) {
-    var fs = util.fs();
-    var complete1, complete2;
-
-    function maybeDone() {
-      if(complete1 && complete2) {
-        done();
-      }
-    }
-
-    fs.open('/myfile', 'w+', function(error, fd) {
-      if(error) throw error;
-
-      fs.close(fd, function(error) {
-        if(error) throw error;
-
-        fs.link('/myfile', '/myotherfile', function(error) {
-          if(error) throw error;
-
-          fs.unlink('/myfile', function(error) {
-            if(error) throw error;
-
-            fs.stat('/myfile', function(error, result) {
-              expect(error).to.exist;
-              complete1 = true;
-              maybeDone();
-            });
-
-            fs.stat('/myotherfile', function(error, result) {
-              if(error) throw error;
-
-              expect(result.nlinks).to.equal(1);
-              complete2 = true;
-              maybeDone();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should not follow symbolic links', function(done) {
-    var fs = util.fs();
-
-    fs.symlink('/', '/myFileLink', function (error) {
-      if (error) throw error;
-
-      fs.link('/myFileLink', '/myotherfile', function (error) {
-        if (error) throw error;
-
-        fs.unlink('/myFileLink', function (error) {
-          if (error) throw error;
-
-          fs.lstat('/myFileLink', function (error, result) {
-            expect(error).to.exist;
-
-            fs.lstat('/myotherfile', function (error, result) {
-              if (error) throw error;
-              expect(result.nlinks).to.equal(1);
-
-              fs.stat('/', function (error, result) {
-                if (error) throw error;
-                expect(result.nlinks).to.equal(1);
-                done();
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should not unlink directories', function (done) {
-    var fs = util.fs();
-
-    fs.mkdir('/mydir', function (error) {
-      if(error) throw error;
-
-      fs.unlink('/mydir', function (error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EPERM');
-
-        fs.stat('/mydir', function (error, stats) {
-          expect(error).not.to.exist;
-          expect(stats).to.exist;
-          expect(stats.type).to.equal('DIRECTORY');
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],113:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.utimes', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.utimes).to.be.a('function');
-  });
-
-  it('should error when atime is negative', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function(error) {
-      if (error) throw error;
-
-      fs.utimes('/testfile', -1, Date.now(), function (error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EINVAL');
-        done();
-      });
-    });
-  });
-
-  it('should error when mtime is negative', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function(error) {
-      if (error) throw error;
-
-      fs.utimes('/testfile', Date.now(), -1, function (error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EINVAL');
-        done();
-      });
-    });
-  });
-
-  it('should error when atime is as invalid number', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.utimes('/testfile', 'invalid datetime', Date.now(), function (error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EINVAL');
-        done();
-      });
-    });
-  });
-
-  it('should error when path does not exist', function(done) {
-    var fs = util.fs();
-    var atime = Date.parse('1 Oct 2000 15:33:22');
-    var mtime = Date.parse('30 Sep 2000 06:43:54');
-
-    fs.utimes('/pathdoesnotexist', atime, mtime, function (error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal('ENOENT');
-      done();
-    });
-  });
-
-  it('should error when mtime is an invalid number', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.utimes('/testfile', Date.now(), 'invalid datetime', function (error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EINVAL');
-        done();
-      });
-    });
-  });
-
-  it('should error when file descriptor is invalid', function(done) {
-    var fs = util.fs();
-    var atime = Date.parse('1 Oct 2000 15:33:22');
-    var mtime = Date.parse('30 Sep 2000 06:43:54');
-
-    fs.futimes(1, atime, mtime, function (error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal('EBADF');
-      done();
-    });
-  });
-
-  it('should change atime and mtime of a file path', function(done) {
-    var fs = util.fs();
-    var atime = Date.parse('1 Oct 2000 15:33:22');
-    var mtime = Date.parse('30 Sep 2000 06:43:54');
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.utimes('/testfile', atime, mtime, function (error) {
-        expect(error).not.to.exist;
-
-        fs.stat('/testfile', function (error, stat) {
-          expect(error).not.to.exist;
-          expect(stat.mtime).to.equal(mtime);
-          done();
-        });
-      });
-    });
-  });
-
-  it ('should change atime and mtime for a valid file descriptor', function(done) {
-    var fs = util.fs();
-    var ofd;
-    var atime = Date.parse('1 Oct 2000 15:33:22');
-    var mtime = Date.parse('30 Sep 2000 06:43:54');
-
-    fs.open('/testfile', 'w', function (error, result) {
-      if (error) throw error;
-
-      ofd = result;
-      fs.futimes(ofd, atime, mtime, function (error) {
-        expect(error).not.to.exist;
-
-        fs.fstat(ofd, function (error, stat) {
-          expect(error).not.to.exist;
-          expect(stat.mtime).to.equal(mtime);
-            done();
-        });
-      });
-    });
-  });
-
-  it('should update atime and mtime of directory path', function(done) {
-    var fs = util.fs();
-    var atime = Date.parse('1 Oct 2000 15:33:22');
-    var mtime = Date.parse('30 Sep 2000 06:43:54');
-
-    fs.mkdir('/testdir', function (error) {
-      if (error) throw error;
-
-      fs.utimes('/testdir', atime, mtime, function (error) {
-        expect(error).not.to.exist;
-
-        fs.stat('/testdir', function (error, stat) {
-          expect(error).not.to.exist;
-          expect(stat.mtime).to.equal(mtime);
-          done();
-        });
-      });
-    });
-  });
-
-  it('should update atime and mtime using current time if arguments are null', function(done) {
-    var fs = util.fs();
-    var atimeEst;
-    var mtimeEst;
-
-    fs.writeFile('/myfile', '', function (error) {
-      if (error) throw error;
-
-      var then = Date.now();
-      fs.utimes('/myfile', null, null, function (error) {
-        expect(error).not.to.exist;
-
-        fs.stat('/myfile', function (error, stat) {
-          expect(error).not.to.exist;
-          // Note: testing estimation as time may differ by a couple of milliseconds
-          // This number should be increased if tests are on slow systems
-          var delta = Date.now() - then;
-          expect(then - stat.atime).to.be.at.most(delta);
-          expect(then - stat.mtime).to.be.at.most(delta);
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],114:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.watch', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(typeof fs.watch).to.equal('function');
-  });
-
-  it('should get a change event when writing a file', function(done) {
-    var fs = util.fs();
-
-    var watcher = fs.watch('/myfile', function(event, filename) {
-      expect(event).to.equal('change');
-      expect(filename).to.equal('/myfile');
-      watcher.close();
-      done();
-    });
-
-    fs.writeFile('/myfile', 'data', function(error) {
-      if(error) throw error;
-    });
-  });
-
-  it('should get a change event when writing a file beneath root dir with recursive=true', function(done) {
-    var fs = util.fs();
-
-    var watcher = fs.watch('/', { recursive: true }, function(event, filename) {
-      expect(event).to.equal('change');
-      expect(filename).to.equal('/');
-      watcher.close();
-      done();
-    });
-
-    fs.writeFile('/myfile', 'data', function(error) {
-      if(error) throw error;
-    });
-  });
-
-  it('should get a change event when writing a file in a dir with recursive=true', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/foo', function(err) {
-      if(err) throw err;
-
-      var watcher = fs.watch('/foo', { recursive: true }, function(event, filename) {
-        expect(event).to.equal('change');
-        expect(filename).to.equal('/foo');
-        watcher.close();
-        done();
-      });
-
-      // This shouldn't produce a change event
-      fs.writeFile('/myfile-not-in-foo', 'data', function(error) {
-        if(error) throw error;
-      });
-
-      // This should
-      fs.writeFile('/foo/myfile', 'data', function(error) {
-        if(error) throw error;
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],115:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.write', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.write).to.be.a('function');
-  });
-
-  it('should write data to a file', function(done) {
-    var fs = util.fs();
-    var buffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-
-    fs.open('/myfile', 'w', function(error, fd) {
-      if(error) throw error;
-
-      fs.write(fd, buffer, 0, buffer.length, 0, function(error, result) {
-        expect(error).not.to.exist;
-        expect(result).to.equal(buffer.length);
-
-        fs.stat('/myfile', function(error, result) {
-          expect(error).not.to.exist;
-          expect(result.type).to.equal('FILE');
-          expect(result.size).to.equal(buffer.length);
-          done();
-        });
-      });
-    });
-  });
-
-  it('should update the current file position', function(done) {
-    var fs = util.fs();
-    var buffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-    var _result = 0;
-
-    fs.open('/myfile', 'w', function(error, fd) {
-      if(error) throw error;
-
-      fs.write(fd, buffer, 0, buffer.length, undefined, function(error, result) {
-        if(error) throw error;
-        _result += result;
-
-        fs.write(fd, buffer, 0, buffer.length, undefined, function(error, result) {
-          if(error) throw error;
-          _result += result;
-
-          fs.stat('/myfile', function(error, result) {
-            if(error) throw error;
-            expect(error).not.to.exist;
-            expect(_result).to.equal(2 * buffer.length);
-            expect(result.size).to.equal(_result);
-            done();
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],116:[function(require,module,exports){
-(function (Buffer){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.writeFile, fs.readFile', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fs = util.fs();
-    expect(fs.writeFile).to.be.a('function');
-    expect(fs.readFile).to.be.a('function');
-  });
-
-  it('should error when path is wrong to readFile', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-
-    fs.readFile('/no-such-file', 'utf8', function(error, data) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("ENOENT");
-      expect(data).not.to.exist;
-      done();
-    });
-  });
-
-  it('should write, read a utf8 file without specifying utf8 in writeFile', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-
-    fs.writeFile('/myfile', contents, function(error) {
-      if(error) throw error;
-      fs.readFile('/myfile', 'utf8', function(error, data) {
-        expect(error).not.to.exist;
-        expect(data).to.equal(contents);
-        done();
-      });
-    });
-  });
-
-  it('should write, read a utf8 file with "utf8" option to writeFile', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-
-    fs.writeFile('/myfile', contents, 'utf8', function(error) {
-      if(error) throw error;
-      fs.readFile('/myfile', 'utf8', function(error, data) {
-        expect(error).not.to.exist;
-        expect(data).to.equal(contents);
-        done();
-      });
-    });
-  });
-
-  it('should write, read a utf8 file with {encoding: "utf8"} option to writeFile', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-
-    fs.writeFile('/myfile', contents, { encoding: 'utf8' }, function(error) {
-      if(error) throw error;
-      fs.readFile('/myfile', 'utf8', function(error, data) {
-        expect(error).not.to.exist;
-        expect(data).to.equal(contents);
-        done();
-      });
-    });
-  });
-
-  it('should write, read a binary file', function(done) {
-    var fs = util.fs();
-    // String and utf8 binary encoded versions of the same thing:
-    var contents = "This is a file.";
-    var binary = new Buffer([84, 104, 105, 115, 32, 105, 115, 32, 97, 32, 102, 105, 108, 101, 46]);
-
-    fs.writeFile('/myfile', binary, function(error) {
-      if(error) throw error;
-      fs.readFile('/myfile', function(error, data) {
-        expect(error).not.to.exist;
-        expect(data).to.deep.equal(binary);
-        done();
-      });
-    });
-  });
-
-  it('should follow symbolic links', function(done) {
-    var fs = util.fs();
-    var contents = "This is a file.";
-
-    fs.writeFile('/myfile', '', { encoding: 'utf8' }, function(error) {
-      if(error) throw error;
-      fs.symlink('/myfile', '/myFileLink', function (error) {
-        if (error) throw error;
-        fs.writeFile('/myFileLink', contents, 'utf8', function (error) {
-          if (error) throw error;
-          fs.readFile('/myFileLink', 'utf8', function(error, data) {
-            expect(error).not.to.exist;
-            expect(data).to.equal(contents);
-            done();
-          });
-        });
-      });
-    });
-  });
-});
-
-}).call(this,require("buffer").Buffer)
-},{"../..":59,"../lib/test-utils.js":87,"buffer":8,"chai":10}],117:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('fs.xattr', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function () {
-    var fs = util.fs();
-    expect(fs.setxattr).to.be.a('function');
-    expect(fs.getxattr).to.be.a('function');
-    expect(fs.removexattr).to.be.a('function');
-    expect(fs.fsetxattr).to.be.a('function');
-    expect(fs.fgetxattr).to.be.a('function');
-  });
-
-  it('should error when setting with a name that is not a string', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 89, 'testvalue', function (error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EINVAL');
-        done();
-      });
-    });
-  });
-
-  it('should error when setting with a name that is null', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', null, 'testvalue', function (error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EINVAL');
-        done();
-      });
-    });
-  });
-
-  it('should error when setting with an invalid flag', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 'test', 'value', 'InvalidFlag', function (error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EINVAL');
-        done();
-      });
-    });
-  });
-
-  it('should error when when setting an extended attribute which exists with XATTR_CREATE flag', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function(error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 'test', 'value', function(error) {
-        if (error) throw error;
-
-        fs.setxattr('/testfile', 'test', 'othervalue', 'CREATE', function(error) {
-          expect(error).to.exist;
-          expect(error.code).to.equal('EEXIST');
-          done();
-        });
-      });
-    });
-  });
-
-  it('should error when setting an extended attribute which does not exist with XATTR_REPLACE flag', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function(error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 'test', 'value', 'REPLACE', function(error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('ENOATTR');
-        done();
-      });
-    });
-  });
-
-  it('should error when getting an attribute with a name that is empty', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function(error) {
-      if (error) throw error;
-
-      fs.getxattr('/testfile', '', function(error, value) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EINVAL');
-        done();
-      });
-    });
-  });
-
-  it('should error when getting an attribute where the name is not a string', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function(error) {
-      if (error) throw error;
-
-      fs.getxattr('/testfile', 89, function(error, value) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EINVAL');
-        done();
-      });
-    });
-  });
-
-  it('should error when getting an attribute that does not exist', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function(error) {
-      if (error) throw error;
-
-      fs.getxattr('/testfile', 'test', function(error, value) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('ENOATTR');
-        done();
-      });
-    });
-  });
-
-  it('should error when file descriptor is invalid', function(done) {
-    var fs = util.fs();
-    var completeSet, completeGet, completeRemove;
-    var _value;
-
-    completeSet = completeGet = completeRemove = false;
-
-    function maybeDone() {
-      if(completeSet && completeGet && completeRemove) {
-        done();
-      }
-    }
-
-    fs.fsetxattr(1, 'test', 'value', function(error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal('EBADF');
-      completeSet = true;
-      maybeDone();
-    });
-
-    fs.fgetxattr(1, 'test', function(error, value) {
-      expect(error).to.exist;
-      expect(error.code).to.equal('EBADF');
-      expect(value).not.to.exist;
-      completeGet = true;
-      maybeDone();
-    });
-
-    fs.fremovexattr(1, 'test', function(error, value) {
-      expect(error).to.exist;
-      expect(error.code).to.equal('EBADF');
-      completeRemove = true;
-      maybeDone();
-    });
-  });
-
-  it('should set and get an extended attribute of a path', function(done) {
-    var fs = util.fs();
-    var name = 'test';
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', name, 'somevalue', function(error) {
-        expect(error).not.to.exist;
-
-        fs.getxattr('/testfile', name, function(error, value) {
-          expect(error).not.to.exist;
-          expect(value).to.equal('somevalue');
-          done();
-        });
-      });
-    });
-  });
-
-  it('should error when attempting to remove a non-existing attribute', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 'test', '', function (error) {
-        if (error) throw error;
-
-        fs.removexattr('/testfile', 'testenoattr', function (error) {
-          expect(error).to.exist;
-          expect(error.code).to.equal('ENOATTR');
-          done();
-        });
-      });
-    });
-  });
-
-  it('should set and get an empty string as a value', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 'test', '', function (error) {
-        if(error) throw error;
-
-        fs.getxattr('/testfile', 'test', function (error, value) {
-          expect(error).not.to.exist;
-          expect(value).to.equal('');
-          done();
-        });
-      });
-    });
-  });
-
-  it('should set and get an extended attribute for a valid file descriptor', function(done) {
-    var fs = util.fs();
-
-    fs.open('/testfile', 'w', function (error, ofd) {
-      if (error) throw error;
-
-      fs.fsetxattr(ofd, 'test', 'value', function (error) {
-        expect(error).not.to.exist;
-
-        fs.fgetxattr(ofd, 'test', function (error, value) {
-          expect(error).not.to.exist;
-          expect(value).to.equal('value');
-          done();
-        });
-      });
-    });
-  });
-
-  it('should set and get an object to an extended attribute', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 'test', { key1: 'test', key2: 'value', key3: 87 }, function (error) {
-        if(error) throw error;
-
-        fs.getxattr('/testfile', 'test', function (error, value) {
-          expect(error).not.to.exist;
-          expect(value).to.deep.equal({ key1: 'test', key2: 'value', key3: 87 });
-          done();
-        });
-      });
-    });
-  });
-
-  it('should update/overwrite an existing extended attribute', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 'test', 'value', function (error) {
-        if (error) throw error;
-
-        fs.getxattr('/testfile', 'test', function (error, value) {
-          if (error) throw error;
-          expect(value).to.equal('value');
-
-          fs.setxattr('/testfile', 'test', { o: 'object', t: 'test' }, function (error) {
-            if (error) throw error;
-
-            fs.getxattr('/testfile', 'test', function (error, value) {
-              if (error) throw error;
-              expect(value).to.deep.equal({ o: 'object', t: 'test' });
-
-              fs.setxattr('/testfile', 'test', 100, 'REPLACE', function (error) {
-                if (error) throw error;
-
-                fs.getxattr('/testfile', 'test', function (error, value) {
-                  expect(value).to.equal(100);
-                  done();
-                });
-              });
-            });
-          });
-        });
-      })
-    });
-  });
-
-  it('should set multiple extended attributes for a path', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 'test', 89, function (error) {
-        if (error) throw error;
-
-        fs.setxattr('/testfile', 'other', 'attribute', function (error) {
-          if(error) throw error;
-
-          fs.getxattr('/testfile', 'test', function (error, value) {
-            if(error) throw error;
-            expect(value).to.equal(89);
-
-            fs.getxattr('/testfile', 'other', function (error, value) {
-              expect(error).not.to.exist;
-              expect(value).to.equal('attribute');
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should remove an extended attribute from a path', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 'test', 'somevalue', function (error) {
-        if (error) throw error;
-
-        fs.getxattr('/testfile', 'test', function (error, value) {
-          if (error) throw error;
-          expect(value).to.equal('somevalue');
-
-          fs.removexattr('/testfile', 'test', function (error) {
-            if (error) throw error;
-
-            fs.getxattr('/testfile', 'test', function (error) {
-              expect(error).to.exist;
-              expect(error.code).to.equal('ENOATTR');
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should remove an extended attribute from a valid file descriptor', function(done) {
-    var fs = util.fs();
-
-    fs.open('/testfile', 'w', function (error, ofd) {
-      if (error) throw error;
-
-      fs.fsetxattr(ofd, 'test', 'somevalue', function (error) {
-        if (error) throw error;
-
-        fs.fgetxattr(ofd, 'test', function (error, value) {
-          if (error) throw error;
-          expect(value).to.equal('somevalue');
-
-          fs.fremovexattr(ofd, 'test', function (error) {
-            if (error) throw error;
-
-            fs.fgetxattr(ofd, 'test', function (error) {
-              expect(error).to.exist;
-              expect(error.code).to.equal('ENOATTR');
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should allow setting with a null value', function(done) {
-    var fs = util.fs();
-
-    fs.writeFile('/testfile', '', function (error) {
-      if (error) throw error;
-
-      fs.setxattr('/testfile', 'test', null, function (error) {
-        if (error) throw error;
-
-        fs.getxattr('/testfile', 'test', function (error, value) {
-          expect(error).not.to.exist;
-          expect(value).to.be.null;
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],118:[function(require,module,exports){
-var Filer = require('../../../..');
-var util = require('../../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe("node.js tests: https://github.com/joyent/node/blob/master/test/simple/test-fs-mkdir.js", function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  // Based on test1 from https://github.com/joyent/node/blob/master/test/simple/test-fs-mkdir.js
-  it('should create a dir without a mode arg', function(done) {
-    var pathname = '/test1';
-    var fs = util.fs();
-
-    fs.mkdir(pathname, function(error) {
-      if(error) throw error;
-      fs.stat(pathname, function(error, result) {
-        expect(error).not.to.exist;
-        expect(result).to.exist;
-        expect(result.type).to.equal('DIRECTORY');
-        done();
-      });
-    });
-  });
-
-  // Based on test2 https://github.com/joyent/node/blob/master/test/simple/test-fs-mkdir.js
-  it('should create a dir with a mode arg', function(done) {
-    var pathname = '/test2';
-    var fs = util.fs();
-
-    fs.mkdir(pathname, 511 /*=0777*/, function(error) {
-      if(error) throw error;
-      fs.stat(pathname, function(error, result) {
-        expect(error).not.to.exist;
-        expect(result).to.exist;
-        expect(result.type).to.equal('DIRECTORY');
-        done();
-      });
-    });
-  });
-});
-
-},{"../../../..":59,"../../../lib/test-utils.js":87,"chai":10}],119:[function(require,module,exports){
-var Filer = require('../../../..');
-var util = require('../../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe("node.js tests: https://github.com/joyent/node/blob/master/test/simple/test-fs-null-bytes.js", function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should reject paths with null bytes in them', function(done) {
-    var checks = [];
-    var fnCount = 0;
-    var fnTotal = 16;
-    var expected = "Path must be a string without null bytes.";
-    var fs = util.fs();
-
-    // Make sure function fails with null path error in callback.
-    function check(fn) {
-      var args = Array.prototype.slice.call(arguments, 1);
-      args = args.concat(function(err) {
-        checks.push(function(){
-          expect(err).to.exist;
-          expect(err.message).to.equal(expected);
-        });
-        fnCount++;
-        if(fnCount === fnTotal) {
-          done();
-        }
-      });
-
-      fn.apply(fs, args);
-    }
-
-    check(fs.link,        '/foo\u0000bar', 'foobar');
-    check(fs.link,        '/foobar', 'foo\u0000bar');
-    check(fs.lstat,       '/foo\u0000bar');
-    check(fs.mkdir,       '/foo\u0000bar', '0755');
-    check(fs.open,        '/foo\u0000bar', 'r');
-    check(fs.readFile,    '/foo\u0000bar');
-    check(fs.readdir,     '/foo\u0000bar');
-    check(fs.readlink,    '/foo\u0000bar');
-    check(fs.rename,      '/foo\u0000bar', 'foobar');
-    check(fs.rename,      '/foobar', 'foo\u0000bar');
-    check(fs.rmdir,       '/foo\u0000bar');
-    check(fs.stat,        '/foo\u0000bar');
-    check(fs.symlink,     '/foo\u0000bar', 'foobar');
-    check(fs.symlink,     '/foobar', 'foo\u0000bar');
-    check(fs.unlink,      '/foo\u0000bar');
-    check(fs.writeFile,   '/foo\u0000bar');
-    check(fs.appendFile,  '/foo\u0000bar');
-    check(fs.truncate,    '/foo\u0000bar');
-    check(fs.utimes,      '/foo\u0000bar', 0, 0);
-    // TODO - need to be implemented still...
-    //  check(fs.realpath,    '/foo\u0000bar');
-    //  check(fs.chmod,       '/foo\u0000bar', '0644');
-    //  check(fs.chown,       '/foo\u0000bar', 12, 34);
-    //  check(fs.realpath,    '/foo\u0000bar');
-
-    checks.forEach(function(fn){
-      fn();
-    });
-  });
-});
-
-},{"../../../..":59,"../../../lib/test-utils.js":87,"chai":10}],120:[function(require,module,exports){
-var Filer = require('../../../..');
-var util = require('../../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-/**
- * NOTE: unlike node.js, which either doesn't give filenames (e.g., in case of
- * fd vs. path) for events, or gives only a portion thereof (e.g., basname),
- * we give full, abs paths always.
- */
-describe("node.js tests: https://github.com/joyent/node/blob/master/test/simple/test-fs-watch-recursive.js", function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should get change event for writeFile() under a recursive watched dir', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/test', function(error) {
-      if(error) throw error;
-
-      fs.mkdir('/test/subdir', function(error) {
-        if(error) throw error;
-
-        var watcher = fs.watch('/test', {recursive: true});
-        watcher.on('change', function(event, filename) {
-          expect(event).to.equal('change');
-          // Expect to see that a new file was created in /test/subdir
-          expect(filename).to.equal('/test/subdir');
-          watcher.close();
-          done();
-        });
-
-        fs.writeFile('/test/subdir/watch.txt', 'world');
-      });
-    });
-  });
-});
-
-},{"../../../..":59,"../../../lib/test-utils.js":87,"chai":10}],121:[function(require,module,exports){
-var Filer = require('../../../..');
-var util = require('../../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-/**
- * NOTE: unlike node.js, which either doesn't give filenames (e.g., in case of
- * fd vs. path) for events, or gives only a portion thereof (e.g., basname),
- * we give full, abs paths always.
- */
-var filenameOne = '/watch.txt';
-var filenameTwo = '/hasOwnProperty';
-
-describe("node.js tests: https://github.com/joyent/node/blob/master/test/simple/test-fs-watch.js", function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should get change event for writeFile() using FSWatcher object', function(done) {
-    var fs = util.fs();
-    var changes = 0;
-
-    var watcher = fs.watch(filenameOne);
-    watcher.on('change', function(event, filename) {
-      expect(event).to.equal('change');
-      expect(filename).to.equal(filenameOne);
-
-      // Make sure only one change event comes in (i.e., close() works)
-      changes++;
-      watcher.close();
-
-      fs.writeFile(filenameOne, 'hello again', function(error) {
-        expect(changes).to.equal(1);
-        done();
-      });
-    });
-
-    fs.writeFile(filenameOne, 'hello');
-  });
-
-  it('should get change event for writeFile() using fs.watch() only', function(done) {
-    var fs = util.fs();
-    var changes = 0;
-
-    var watcher = fs.watch(filenameTwo, function(event, filename) {
-      expect(event).to.equal('change');
-      expect(filename).to.equal(filenameTwo);
-
-      watcher.close();
-      done();
-    });
-
-    fs.writeFile(filenameTwo, 'pardner');
-  });
-
-  it('should allow watches on dirs', function(done) {
-    var fs = util.fs();
-    fs.mkdir('/tmp', function(error) {
-      if(error) throw error;
-
-      var watcher = fs.watch('/tmp', function(event, filename) {
-// TODO: node thinks this should be 'rename', need to add rename along with change.
-        expect(event).to.equal('change');
-        expect(filename).to.equal('/tmp');
-        watcher.close();
-        done();
-      });
-
-      fs.open('/tmp/newfile.txt', 'w', function(error, fd) {
-        if(error) throw error;
-        fs.close(fd);
-      });
-    });
-  });
-});
-
-},{"../../../..":59,"../../../lib/test-utils.js":87,"chai":10}],122:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('path resolution', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should follow a symbolic link to the root directory', function(done) {
-    var fs = util.fs();
-
-    fs.symlink('/', '/mydirectorylink', function(error) {
-      if(error) throw error;
-
-      fs.stat('/', function(error, result) {
-        if(error) throw error;
-
-        expect(result['node']).to.exist;
-        var _node = result['node'];
-
-        fs.stat('/mydirectorylink', function(error, result) {
-          expect(error).not.to.exist;
-          expect(result).to.exist;
-          expect(result['node']).to.equal(_node);
-          done();
-        });
-      });
-    });
-  });
-
-  it('should follow a symbolic link to a directory', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/mydir', function(error) {
-      fs.symlink('/mydir', '/mydirectorylink', function(error) {
-        if(error) throw error;
-
-        fs.stat('/mydir', function(error, result) {
-          if(error) throw error;
-
-          expect(result['node']).to.exist;
-          var _node = result['node'];
-          fs.stat('/mydirectorylink', function(error, result) {
-            expect(error).not.to.exist;
-            expect(result).to.exist;
-            expect(result['node']).to.equal(_node);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should follow a symbolic link to a file', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-      var fd = result;
-      fs.close(fd, function(error) {
-        if(error) throw error;
-        fs.stat('/myfile', function(error, result) {
-          if(error) throw error;
-
-          expect(result['node']).to.exist;
-          var _node = result['node'];
-          fs.symlink('/myfile', '/myfilelink', function(error) {
-            if(error) throw error;
-
-            fs.stat('/myfilelink', function(error, result) {
-              expect(error).not.to.exist;
-              expect(result).to.exist;
-              expect(result['node']).to.equal(_node);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should follow multiple symbolic links to a file', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-      var fd = result;
-      fs.close(fd, function(error) {
-        if(error) throw error;
-        fs.stat('/myfile', function(error, result) {
-          if(error) throw error;
-
-          expect(result['node']).to.exist;
-          var _node = result['node'];
-          fs.symlink('/myfile', '/myfilelink1', function(error) {
-            if(error) throw error;
-            fs.symlink('/myfilelink1', '/myfilelink2', function(error) {
-              if(error) throw error;
-
-              fs.stat('/myfilelink2', function(error, result) {
-                expect(error).not.to.exist;
-                expect(result).to.exist;
-                expect(result['node']).to.equal(_node);
-                done();
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should error if symbolic link leads to itself', function(done) {
-    var fs = util.fs();
-
-    fs.symlink('/mylink1', '/mylink2', function(error) {
-      if(error) throw error;
-
-      fs.symlink('/mylink2', '/mylink1', function(error) {
-        if(error) throw error;
-
-        fs.stat('/myfilelink1', function(error, result) {
-          expect(error).to.exist;
-          expect(error.code).to.equal("ENOENT");
-          expect(result).not.to.exist;
-          done();
-        });
-      });
-    });
-  });
-
-  it('should error if it follows more than 10 symbolic links', function(done) {
-    var fs = util.fs();
-    var nlinks = 11;
-
-    function createSymlinkChain(n, callback) {
-      if(n > nlinks) {
-        return callback();
-      }
-
-      fs.symlink('/myfile' + (n-1), '/myfile' + n, createSymlinkChain.bind(this, n+1, callback));
-    }
-
-    fs.open('/myfile0', 'w', function(error, result) {
-      if(error) throw error;
-      var fd = result;
-      fs.close(fd, function(error) {
-        if(error) throw error;
-        fs.stat('/myfile0', function(error, result) {
-          if(error) throw error;
-
-          createSymlinkChain(1, function() {
-            fs.stat('/myfile11', function(error, result) {
-              expect(error).to.exist;
-              expect(error.code).to.equal('ELOOP');
-              expect(result).not.to.exist;
-              done();
-            });
-          });
-
-        });
-      });
-    });
-  });
-
-  it('should follow a symbolic link in the path to a file', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-      var fd = result;
-      fs.close(fd, function(error) {
-        if(error) throw error;
-        fs.stat('/myfile', function(error, result) {
-          if(error) throw error;
-
-          var _node = result['node'];
-          fs.symlink('/', '/mydirlink', function(error) {
-            if(error) throw error;
-
-            fs.stat('/mydirlink/myfile', function(error, result) {
-              expect(result).to.exist;
-              expect(error).not.to.exist;
-              expect(_node).to.exist;
-              expect(result['node']).to.equal(_node);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should error if a symbolic link in the path to a file is itself a file', function(done) {
-    var fs = util.fs();
-
-    fs.open('/myfile', 'w', function(error, result) {
-      if(error) throw error;
-      var fd = result;
-      fs.close(fd, function(error) {
-        if(error) throw error;
-        fs.stat('/myfile', function(error, result) {
-          if(error) throw error;
-
-          fs.open('/myfile2', 'w', function(error, result) {
-            if(error) throw error;
-            var fd = result;
-            fs.close(fd, function(error) {
-              if(error) throw error;
-              fs.symlink('/myfile2', '/mynotdirlink', function(error) {
-                if(error) throw error;
-
-                fs.stat('/mynotdirlink/myfile', function(error, result) {
-                  expect(error).to.exist;
-                  expect(error.code).to.equal("ENOTDIR");
-                  expect(result).not.to.exist;
-                  done();
-                });
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should properly add trailing slashes with Path.addTrailing()', function() {
-    var Path = Filer.Path;
-    expect(Path.addTrailing('/')).to.equal('/');
-    expect(Path.addTrailing('/////')).to.equal('/');
-    expect(Path.addTrailing('.')).to.equal('./');
-    expect(Path.addTrailing('/dir')).to.equal('/dir/');
-    expect(Path.addTrailing('/dir/')).to.equal('/dir/');
-  });
-
-  it('should properly remove trailing slashes with Path.removeTrailing()', function() {
-    var Path = Filer.Path;
-    expect(Path.removeTrailing('/')).to.equal('/');
-    expect(Path.removeTrailing('/////')).to.equal('/');
-    expect(Path.removeTrailing('./')).to.equal('.');
-    expect(Path.removeTrailing('/dir/')).to.equal('/dir');
-    expect(Path.removeTrailing('/dir//')).to.equal('/dir');
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],123:[function(require,module,exports){
-var Buffer = require('../../..').Buffer;
-var util = require('../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-/**
- * Due to the different setup/cleanup needs of the built-in providers,
- * we use the test provider wrappers instead of the raw providers themselves.
- */
-module.exports = function createProviderTestsFor(providerName, testProvider) {
-  if(!testProvider.isSupported()) {
-    console.log("Skipping provider tests for `" + providerName +"'--not supported in current environment.");
-    return;
-  }
-
-  describe("Filer Provider Tests for " + providerName, function() {
-    var _provider;
-    var provider;
-
-    beforeEach(function() {
-      _provider = new testProvider(util.uniqueName());
-      _provider.init();
-      provider = _provider.provider;
-    });
-
-    afterEach(function(done) {
-      _provider.cleanup(done);
-      _provider = null;
-      provider = null;
-    });
-
-
-    it("has open, getReadOnlyContext, and getReadWriteContext instance methods", function() {
-      expect(provider.open).to.be.a('function');
-      expect(provider.getReadOnlyContext).to.be.a('function');
-      expect(provider.getReadWriteContext).to.be.a('function');
-    });
-
-    it("should open a new provider database", function(done) {
-      provider.open(function(error) {
-        expect(error).not.to.exist;
-        done();
-      });
-    });
-
-    it("should allow putObject() and getObject()", function(done) {
-      provider.open(function(error, firstAccess) {
-        if(error) throw error;
-
-        var context = provider.getReadWriteContext();
-        // Simple JS Object
-        var value = {
-          a: "a",
-          b: 1,
-          c: true,
-          d: [1,2,3],
-          e: {
-            e1: ['a', 'b', 'c']
-          }
-        };
-        context.putObject("key", value, function(error) {
-          if(error) throw error;
-
-          context.getObject("key", function(error, result) {
-            expect(error).not.to.exist;
-            expect(result).to.be.an('object');
-            expect(result).to.deep.equal(value);
-            done();
-          });
-        });
-      });
-    });
-
-    it("should allow putBuffer() and getBuffer()", function(done) {
-      provider.open(function(error, firstAccess) {
-        if(error) throw error;
-
-        var context = provider.getReadWriteContext();
-        // Filer Buffer
-        var buf = new Buffer([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
-        context.putBuffer("key", buf, function(error) {
-          if(error) throw error;
-
-          context.getBuffer("key", function(error, result) {
-            expect(error).not.to.exist;
-            expect(Buffer.isBuffer(result)).to.be.true;
-            expect(result).to.deep.equal(buf);
-            done();
-          });
-        });
-      });
-    });
-
-    it("should allow zero-length Buffers with putBuffer() and getBuffer()", function(done) {
-      provider.open(function(error, firstAccess) {
-        if(error) throw error;
-
-        var context = provider.getReadWriteContext();
-        // Zero-length Filer Buffer
-        var buf = new Buffer(new ArrayBuffer(0));
-        context.putBuffer("key", buf, function(error) {
-          if(error) throw error;
-
-          context.getBuffer("key", function(error, result) {
-            expect(error).not.to.exist;
-            expect(Buffer.isBuffer(result)).to.be.true;
-            expect(result).to.deep.equal(buf);
-            done();
-          });
-        });
-      });
-    });
-
-    it("should allow delete()", function(done) {
-      var provider = _provider.provider;
-      provider.open(function(error, firstAccess) {
-        if(error) throw error;
-
-        var context = provider.getReadWriteContext();
-        context.putObject("key", "value", function(error) {
-          if(error) throw error;
-
-          context.delete("key", function(error) {
-            if(error) throw error;
-
-            context.getObject("key", function(error, result) {
-              expect(error).not.to.exist;
-              expect(result).not.to.exist;
-              done();
-            });
-          });
-        });
-      });
-    });
-
-    it("should allow clear()", function(done) {
-      provider.open(function(error, firstAccess) {
-        if(error) throw error;
-
-        var context = provider.getReadWriteContext();
-        context.putObject("key1", "value1", function(error) {
-          if(error) throw error;
-
-          context.putObject("key2", "value2", function(error) {
-            if(error) throw error;
-
-            context.clear(function(err) {
-              if(error) throw error;
-
-              context.getObject("key1", function(error, result) {
-                if(error) throw error;
-                expect(result).not.to.exist;
-
-                context.getObject("key2", function(error, result) {
-                  if(error) throw error;
-                  expect(result).not.to.exist;
-                  done();
-                });
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-};
-
-},{"../../..":59,"../../lib/test-utils.js":87,"chai":10}],124:[function(require,module,exports){
-var util = require('../../lib/test-utils.js');
-var providerBase = require('./providers.base.js');
-
-providerBase('IndexedDB', util.providers.IndexedDB);
-
-},{"../../lib/test-utils.js":87,"./providers.base.js":123}],125:[function(require,module,exports){
-var util = require('../../lib/test-utils.js');
-var providerBase = require('./providers.base.js');
-
-providerBase('Memory', util.providers.Memory);
-
-},{"../../lib/test-utils.js":87,"./providers.base.js":123}],126:[function(require,module,exports){
-var Filer = require('../../..');
-var expect = require('chai').expect;
-
-describe("Filer.FileSystem.providers", function() {
-  it("is defined", function() {
-    expect(Filer.FileSystem.providers).to.exist;
-  });
-
-  it("has IndexedDB constructor", function() {
-    expect(Filer.FileSystem.providers.IndexedDB).to.be.a('function');
-  });
-
-  it("has WebSQL constructor", function() {
-    expect(Filer.FileSystem.providers.WebSQL).to.be.a('function');
-  });
-
-  it("has Memory constructor", function() {
-    expect(Filer.FileSystem.providers.Memory).to.be.a('function');
-  });
-
-  it("has a Default constructor", function() {
-    expect(Filer.FileSystem.providers.Default).to.be.a('function');
-  });
-
-  it("has Fallback constructor", function() {
-    expect(Filer.FileSystem.providers.Fallback).to.be.a('function');
-  });
-});
-
-},{"../../..":59,"chai":10}],127:[function(require,module,exports){
-var util = require('../../lib/test-utils.js');
-var providerBase = require('./providers.base.js');
-
-providerBase('WebSQL', util.providers.WebSQL);
-
-},{"../../lib/test-utils.js":87,"./providers.base.js":123}],128:[function(require,module,exports){
-var Filer = require('../../..');
-var util = require('../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('FileSystemShell.cat', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var shell = util.shell();
-    expect(shell.cat).to.be.a('function');
-  });
-
-  it('should fail when files argument is absent', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    shell.cat(null, function(error, data) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("EINVAL");
-      expect(data).not.to.exist;
-      done();
-    });
-  });
-
-  it('should return the contents of a single file', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var contents = "file contents";
-
-    fs.writeFile('/file', contents, function(err) {
-      if(err) throw err;
-
-      shell.cat('/file', function(err, data) {
-        expect(err).not.to.exist;
-        expect(data).to.equal(contents);
-        done();
-      });
-    });
-  });
-
-  it('should return the contents of multiple files', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var contents = "file contents";
-    var contents2 = contents + '\n' + contents;
-
-    fs.writeFile('/file', contents, function(err) {
-      if(err) throw err;
-
-      fs.writeFile('/file2', contents2, function(err) {
-        if(err) throw err;
-
-        shell.cat(['/file', '/file2'], function(err, data) {
-          expect(err).not.to.exist;
-          expect(data).to.equal(contents + '\n' + contents2);
-          done();
-        });
-      });
-    });
-  });
-
-  it('should fail if any of multiple file paths is invalid', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var contents = "file contents";
-    var contents2 = contents + '\n' + contents;
-
-    fs.writeFile('/file', contents, function(err) {
-      if(err) throw err;
-
-      fs.writeFile('/file2', contents2, function(err) {
-        if(err) throw err;
-
-        shell.cat(['/file', '/nofile'], function(err, data) {
-          expect(err).to.exist;
-          expect(err.code).to.equal("ENOENT");
-          expect(data).not.to.exist;
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../../..":59,"../../lib/test-utils.js":87,"chai":10}],129:[function(require,module,exports){
-var Filer = require('../../..');
-var util = require('../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('FileSystemShell.cd', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var shell = util.shell();
-    expect(shell.cd).to.be.a('function');
-  });
-
-  it('should default to a cwd of /', function() {
-    var shell = util.shell();
-    expect(shell.pwd()).to.equal('/');
-  });
-
-  it('should allow changing the path to a valid dir', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      expect(shell.pwd()).to.equal('/');
-      shell.cd('/dir', function(err) {
-        expect(err).not.to.exist;
-        expect(shell.pwd()).to.equal('/dir');
-        done();
-      });
-    });
-  });
-
-  it('should fail when changing the path to an invalid dir', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      expect(shell.pwd()).to.equal('/');
-      shell.cd('/nodir', function(err) {
-        expect(err).to.exist;
-        expect(err.code).to.equal('ENOTDIR');
-        expect(shell.pwd()).to.equal('/');
-        done();
-      });
-    });
-  });
-
-  it('should fail when changing the path to a file', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    fs.writeFile('/file', 'file', function(err) {
-      if(err) throw err;
-
-      expect(shell.pwd()).to.equal('/');
-      shell.cd('/file', function(err) {
-        expect(err).to.exist;
-        expect(err.code).to.equal('ENOTDIR');
-        expect(shell.pwd()).to.equal('/');
-        done();
-      });
-    });
-  });
-
-  it('should allow relative paths for a valid dir', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      expect(shell.pwd()).to.equal('/');
-      shell.cd('./dir', function(err) {
-        expect(err).not.to.exist;
-        expect(shell.pwd()).to.equal('/dir');
-        done();
-      });
-    });
-  });
-
-  it('should allow .. in paths for a valid dir', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      expect(shell.pwd()).to.equal('/');
-      shell.cd('./dir', function(err) {
-        expect(err).not.to.exist;
-        expect(shell.pwd()).to.equal('/dir');
-        shell.cd('..', function(err) {
-          expect(err).not.to.exist;
-          expect(shell.pwd()).to.equal('/');
-          done();
-        });
-      });
-    });
-  });
-
-  it('should follow symlinks to dirs', function(done) {
-    var fs = util.fs();
-
-    fs.mkdir('/dir', function(error) {
-      if(error) throw error;
-
-      fs.symlink('/dir', '/link', function(error) {
-        if(error) throw error;
-
-        var shell = new fs.Shell();
-        shell.cd('link', function(error) {
-          expect(error).not.to.exist;
-          expect(shell.pwd()).to.equal('/link');
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../../..":59,"../../lib/test-utils.js":87,"chai":10}],130:[function(require,module,exports){
-var Filer = require('../../..');
-var util = require('../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('FileSystemShell.env', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should get default env options', function() {
-    var shell = util.shell();
-    expect(shell.env).to.exist;
-    expect(shell.env.get('TMP')).to.equal('/tmp');
-    expect(shell.env.get('PATH')).to.equal('');
-    expect(shell.pwd()).to.equal('/');
-  });
-
-  it('should be able to specify env options', function() {
-    var options = {
-      env: {
-        TMP: '/tempdir',
-        PATH: '/dir'
-      }
-    };
-    var shell = util.shell(options);
-    expect(shell.env).to.exist;
-    expect(shell.env.get('TMP')).to.equal('/tempdir');
-    expect(shell.env.get('PATH')).to.equal('/dir');
-    expect(shell.pwd()).to.equal('/');
-
-    expect(shell.env.get('FOO')).not.to.exist;
-    shell.env.set('FOO', 1);
-    expect(shell.env.get('FOO')).to.equal(1);
-  });
-
-  it('should fail when dirs argument is absent', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    shell.cat(null, function(error, list) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("EINVAL");
-      expect(list).not.to.exist;
-      done();
-    });
-  });
-
-  it('should give new value for shell.pwd() when cwd changes', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      expect(shell.pwd()).to.equal('/');
-      shell.cd('/dir', function(err) {
-        expect(err).not.to.exist;
-        expect(shell.pwd()).to.equal('/dir');
-        done();
-      });
-    });
-  });
-
-  it('should create/return the default tmp dir', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    expect(shell.env.get('TMP')).to.equal('/tmp');
-    shell.tempDir(function(err, tmp) {
-      expect(err).not.to.exist;
-      shell.cd(tmp, function(err) {
-        expect(err).not.to.exist;
-        expect(shell.pwd()).to.equal('/tmp');
-        done();
-      });
-    });
-  });
-
-  it('should create/return the tmp dir specified in env.TMP', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell({
-      env: {
-        TMP: '/tempdir'
-      }
-    });
-
-    expect(shell.env.get('TMP')).to.equal('/tempdir');
-    shell.tempDir(function(err, tmp) {
-      expect(err).not.to.exist;
-      shell.cd(tmp, function(err) {
-        expect(err).not.to.exist;
-        expect(shell.pwd()).to.equal('/tempdir');
-        done();
-      });
-    });
-  });
-
-  it('should allow repeated calls to tempDir()', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    expect(shell.env.get('TMP')).to.equal('/tmp');
-    shell.tempDir(function(err, tmp) {
-      expect(err).not.to.exist;
-      expect(tmp).to.equal('/tmp');
-
-      shell.tempDir(function(err, tmp) {
-        expect(err).not.to.exist;
-        expect(tmp).to.equal('/tmp');
-        done();
-      });
-    });
-  });
-});
-
-},{"../../..":59,"../../lib/test-utils.js":87,"chai":10}],131:[function(require,module,exports){
-var Filer = require('../../..');
-var util = require('../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('FileSystemShell.exec', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var shell = util.shell();
-    expect(shell.exec).to.be.a('function');
-  });
-
-  it('should be able to execute a command .js file from the filesystem', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var cmdString = "fs.writeFile(args[0], args[1], callback);";
-
-    fs.writeFile('/cmd.js', cmdString, function(error) {
-      if(error) throw error;
-
-      shell.exec('/cmd.js', ['/test', 'hello world'], function(error, result) {
-        if(error) throw error;
-
-        fs.readFile('/test', 'utf8', function(error, data) {
-          if(error) throw error;
-          expect(data).to.equal('hello world');
-          done();
-        });
-      });
-    });
-  });
-});
-
-},{"../../..":59,"../../lib/test-utils.js":87,"chai":10}],132:[function(require,module,exports){
-var Filer = require('../../..');
-var util = require('../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('FileSystemShell.find', function() {
-  beforeEach(function(done) {
-    util.setup(function() {
-      var fs = util.fs();
-      /**
-       * Create a basic fs layout for each test:
-       *
-       * /
-       * --file1
-       * --file2
-       * --dir1/
-       *   --file3
-       *   --subdir1/
-       * --dir2/
-       *   --file4
-       */
-      fs.writeFile('/file1', 'file1', function(err) {
-        if(err) throw err;
-
-        fs.writeFile('/file2', 'file2', function(err) {
-          if(err) throw err;
-
-          fs.mkdir('/dir1', function(err) {
-            if(err) throw err;
-
-            fs.writeFile('/dir1/file3', 'file3', function(err) {
-              if(err) throw err;
-
-              fs.mkdir('/dir1/subdir1', function(err) {
-                if(err) throw err;
-
-                fs.mkdir('/dir2', function(err) {
-                  if(err) throw err;
-
-                  fs.writeFile('/dir2/file4', 'file4', function(err) {
-                    if(err) throw err;
-
-                    done();
-                  });
-                });
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var shell = util.shell();
-    expect(shell.find).to.be.a('function');
-  });
-
-  it('should fail when path does not exist', function(done) {
-    var shell = util.shell();
-
-    shell.find('/no-such-folder', function(err, found) {
-      expect(err).to.exist;
-      expect(err.code).to.equal('ENOENT');
-      expect(found).not.to.exist;
-      done();
-    });
-  });
-
-  it('should fail when path exists but is non-dir', function(done) {
-    var shell = util.shell();
-
-    shell.find('/file1', function(err, found) {
-      expect(err).to.exist;
-      expect(err.code).to.equal('ENOTDIR');
-      expect(found).not.to.exist;
-      done();
-    });
-  });
-
-  it('should find all paths in the filesystem with no options', function(done) {
-    var shell = util.shell();
-
-    shell.find('/', function(err, found) {
-      expect(err).not.to.exist;
-
-      var expected = [
-        '/',
-        '/file1',
-        '/file2',
-        '/dir1/',
-        '/dir1/file3',
-        '/dir1/subdir1/',
-        '/dir2/',
-        '/dir2/file4'
-      ];
-      expect(found).to.deep.equal(expected);
-      done();
-    });
-  });
-
-  it('should get same paths in exec as are found when complete', function(done) {
-    var shell = util.shell();
-    var pathsSeen = [];
-
-    function processPath(path, next) {
-      pathsSeen.push(path);
-      next();
-    }
-
-    shell.find('/', {exec: processPath}, function(err, found) {
-      expect(err).not.to.exist;
-
-      expect(found).to.deep.equal(pathsSeen);
-      done();
-    });
-  });
-
-  it('should return only paths that match a regex pattern', function(done) {
-    var shell = util.shell();
-
-    shell.find('/', {regex: /file\d$/}, function(err, found) {
-      expect(err).not.to.exist;
-
-      var expected = [
-        '/file1',
-        '/file2',
-        '/dir1/file3',
-        '/dir2/file4'
-      ];
-      expect(found).to.deep.equal(expected);
-      done();
-    });    
-  });
-
-  it('should append a / to the end of a dir path', function(done) {
-    var shell = util.shell();
-    var dirsSeen = 0;
-
-    function endsWith(str, suffix) {
-      var lastIndex = str.lastIndexOf(suffix);
-      return (lastIndex !== -1) && (lastIndex + suffix.length === str.length);
-    }
-
-    function processPath(path, next) {
-      expect(endsWith(path, '/')).to.be.true;
-      dirsSeen++;
-      next();
-    }
-
-    shell.find('/', {regex: /dir\d$/, exec: processPath}, function(err) {
-      expect(err).not.to.exist;
-      expect(dirsSeen).to.equal(3);
-      done();
-    });    
-  });
-
-  it('should only look below the specified dir path', function(done) {
-    var shell = util.shell();
-
-    shell.find('/dir1', function(err, found) {
-      expect(err).not.to.exist;
-
-      var expected = [
-        '/dir1/',
-        '/dir1/file3',
-        '/dir1/subdir1/'
-      ];
-      expect(found).to.deep.equal(expected);
-      done();
-    });    
-  });
-
-  it('should allow using options.name to match basename with a pattern', function(done) {
-    var shell = util.shell();
-
-    shell.find('/', {name: 'file*'}, function(err, found) {
-      expect(err).not.to.exist;
-
-      var expected = [
-        '/file1',
-        '/file2',
-        '/dir1/file3',
-        '/dir2/file4'
-      ];
-      expect(found).to.deep.equal(expected);
-      done();
-    });
-  });
-
-  it('should allow using options.path to match dirname with a pattern', function(done) {
-    var shell = util.shell();
-
-    shell.find('/', {name: '*ir1*'}, function(err, found) {
-      expect(err).not.to.exist;
-
-      var expected = [
-        '/dir1/',
-        '/dir1/subdir1/'
-      ];
-      expect(found).to.deep.equal(expected);
-      done();
-    });
-  });
-
-});
-
-},{"../../..":59,"../../lib/test-utils.js":87,"chai":10}],133:[function(require,module,exports){
-var Filer = require('../../..');
-var util = require('../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('FileSystemShell.ls', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var shell = util.shell();
-    expect(shell.ls).to.be.a('function');
-  });
-
-  it('should fail when dirs argument is absent', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    shell.cat(null, function(error, list) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("EINVAL");
-      expect(list).not.to.exist;
-      done();
-    });
-  });
-
-  it('should return the contents of a simple dir', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var contents = "a";
-    var contents2 = "bb";
-
-    fs.writeFile('/file', contents, function(err) {
-      if(err) throw err;
-
-      fs.writeFile('/file2', contents2, function(err) {
-        if(err) throw err;
-
-        shell.ls('/', function(err, list) {
-          expect(err).not.to.exist;
-          expect(list.length).to.equal(2);
-
-          var item0 = list[0];
-          expect(item0.name).to.equal('file');
-          expect(item0.nlinks).to.equal(1);
-          expect(item0.size).to.equal(1);
-          expect(item0.mtime).to.be.a('number');
-          expect(item0.type).to.equal('FILE');
-          expect(item0.contents).not.to.exist;
-
-          var item1 = list[1];
-          expect(item1.name).to.equal('file2');
-          expect(item1.nlinks).to.equal(1);
-          expect(item1.size).to.equal(2);
-          expect(item1.mtime).to.be.a('number');
-          expect(item1.type).to.equal('FILE');
-          expect(item0.contents).not.to.exist;
-
-          done();
-        });
-      });
-    });
-  });
-
-  it('should return the shallow contents of a dir tree', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var contents = "a";
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      fs.mkdir('/dir/dir2', function(err) {
-        if(err) throw err;
-
-        fs.writeFile('/dir/file', contents, function(err) {
-          if(err) throw err;
-
-          fs.writeFile('/dir/file2', contents, function(err) {
-            if(err) throw err;
-
-            shell.ls('/dir', function(err, list) {
-              expect(err).not.to.exist;
-              expect(list.length).to.equal(3);
-
-              // We shouldn't rely on the order we'll get the listing
-              list.forEach(function(item, i, arr) {
-                switch(item.name) {
-                case 'dir2':
-                  expect(item.nlinks).to.equal(1);
-                  expect(item.size).to.be.a('number');
-                  expect(item.mtime).to.be.a('number');
-                  expect(item.type).to.equal('DIRECTORY');
-                  expect(item.contents).not.to.exist;
-                  break;
-                case 'file':
-                case 'file2':
-                  expect(item.nlinks).to.equal(1);
-                  expect(item.size).to.equal(1);
-                  expect(item.mtime).to.be.a('number');
-                  expect(item.type).to.equal('FILE');
-                  expect(item.contents).not.to.exist;
-                  break;
-                default:
-                  // shouldn't happen
-                  expect(true).to.be.false;
-                  break;
-                }
-
-                if(i === arr.length -1) {
-                  done();
-                }
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should return the deep contents of a dir tree', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var contents = "a";
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      fs.mkdir('/dir/dir2', function(err) {
-        if(err) throw err;
-
-        fs.writeFile('/dir/dir2/file', contents, function(err) {
-          if(err) throw err;
-
-          fs.writeFile('/dir/file', contents, function(err) {
-            if(err) throw err;
-
-            fs.writeFile('/dir/file2', contents, function(err) {
-              if(err) throw err;
-
-              shell.ls('/dir', { recursive: true }, function(err, list) {
-                expect(err).not.to.exist;
-                expect(list.length).to.equal(3);
-
-                // We shouldn't rely on the order we'll get the listing
-                list.forEach(function(item, i, arr) {
-                  switch(item.name) {
-                  case 'dir2':
-                    expect(item.nlinks).to.equal(1);
-                    expect(item.size).to.be.a('number');
-                    expect(item.mtime).to.be.a('number');
-                    expect(item.type).to.equal('DIRECTORY');
-                    expect(item.contents).to.exist;
-                    expect(item.contents.length).to.equal(1);
-                    var contents0 = item.contents[0];
-                    expect(contents0.name).to.equal('file');
-                    expect(contents0.nlinks).to.equal(1);
-                    expect(contents0.size).to.equal(1);
-                    expect(contents0.mtime).to.be.a('number');
-                    expect(contents0.type).to.equal('FILE');
-                    expect(contents0.contents).not.to.exist;
-                    break;
-                  case 'file':
-                  case 'file2':
-                    expect(item.nlinks).to.equal(1);
-                    expect(item.size).to.equal(1);
-                    expect(item.mtime).to.be.a('number');
-                    expect(item.type).to.equal('FILE');
-                    expect(item.contents).not.to.exist;
-                    break;
-                  default:
-                    // shouldn't happen
-                    expect(true).to.be.false;
-                    break;
-                  }
-
-                  if(i === arr.length -1) {
-                    done();
-                  }
-                });
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../../..":59,"../../lib/test-utils.js":87,"chai":10}],134:[function(require,module,exports){
-var Filer = require('../../..');
-var util = require('../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('FileSystemShell.mkdirp', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var shell = util.shell();
-    expect(shell.mkdirp).to.be.a('function');
-  });
-
-  it('should fail without a path provided', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    shell.mkdirp(null, function(err) {
-      expect(err).to.exist;
-      expect(err.code).to.equal('EINVAL');
-      done();
-    });
-  });
-
-  it('should succeed if provided path is root', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    shell.mkdirp('/', function(err) {
-      expect(err).to.not.exist;
-      done();
-    });
-  });
-
-  it('should succeed if the directory exists', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    fs.mkdir('/test', function(err){
-      expect(err).to.not.exist;
-      shell.mkdirp('/test',function(err) {
-        expect(err).to.not.exist;
-        done();
-      });
-    });
-  });
-
-  it('fail if a file name is provided', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    fs.writeFile('/test.txt', 'test', function(err){
-      expect(err).to.not.exist;
-      shell.mkdirp('/test.txt', function(err) {
-        expect(err).to.exist;
-        expect(err.code).to.equal('ENOTDIR');
-        done();
-      });
-    });
-  });
-
-  it('should succeed on a folder on root (\'/test\')', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    shell.mkdirp('/test', function(err) {
-      expect(err).to.not.exist;
-      fs.exists('/test', function(dir){
-        expect(dir).to.be.true;
-        done();
-      });
-    });
-  });
-
-  it('should succeed on a folder with a nonexistant parent (\'/test/test\')', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    shell.mkdirp('/test/test', function(err) {
-      expect(err).to.not.exist;
-      fs.exists('/test', function(dir1){
-        expect(dir1).to.be.true;
-        fs.exists('/test/test', function(dir2){
-          expect(dir2).to.be.true;
-          done();
-        });
-      });
-    });
-  });
-
-  it('should fail on a folder with a file for its parent (\'/test.txt/test\')', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    fs.writeFile('/test.txt', 'test', function(err){
-      expect(err).to.not.exist;
-      shell.mkdirp('/test.txt/test', function(err) {
-        expect(err).to.exist;
-        expect(err.code).to.equal('ENOTDIR');
-        done();
-      });
-    });
-  });
-});
-
-},{"../../..":59,"../../lib/test-utils.js":87,"chai":10}],135:[function(require,module,exports){
-var Filer = require('../../..');
-var util = require('../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('FileSystemShell.rm', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var shell = util.shell();
-    expect(shell.rm).to.be.a('function');
-  });
-
-  it('should fail when path argument is absent', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    shell.rm(null, function(error, list) {
-      expect(error).to.exist;
-      expect(error.code).to.equal("EINVAL");
-      expect(list).not.to.exist;
-      done();
-    });
-  });
-
-  it('should remove a single file', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var contents = "a";
-
-    fs.writeFile('/file', contents, function(err) {
-      if(err) throw err;
-
-      shell.rm('/file', function(err) {
-        expect(err).not.to.exist;
-
-        fs.stat('/file', function(err, stats) {
-          expect(err).to.exist;
-          expect(stats).not.to.exist;
-          done();
-        });
-      });
-    });
-  });
-
-  it('should remove an empty dir', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      shell.rm('/dir', function(err) {
-        expect(err).not.to.exist;
-
-        fs.stat('/dir', function(err, stats) {
-          expect(err).to.exist;
-          expect(stats).not.to.exist;
-          done();
-        });
-      });
-    });
-  });
-
-  it('should fail to remove a non-empty dir', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      shell.touch('/dir/file', function(err) {
-        if(err) throw err;
-
-        shell.rm('/dir', function(err) {
-          expect(err).to.exist;
-          expect(err.code).to.equal('ENOTEMPTY');
-          done();
-        });
-      });
-    });
-  });
-
-  it('should remove a non-empty dir with option.recursive set', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      shell.touch('/dir/file', function(err) {
-        if(err) throw err;
-
-        shell.rm('/dir', { recursive: true }, function(err) {
-          expect(err).not.to.exist;
-
-          fs.stat('/dir', function(err, stats) {
-            expect(err).to.exist;
-            expect(stats).not.to.exist;
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should work on a complex dir structure', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var contents = "a";
-
-    fs.mkdir('/dir', function(err) {
-      if(err) throw err;
-
-      fs.mkdir('/dir/dir2', function(err) {
-        if(err) throw err;
-
-        fs.writeFile('/dir/file', contents, function(err) {
-          if(err) throw err;
-
-          fs.writeFile('/dir/file2', contents, function(err) {
-            if(err) throw err;
-
-            shell.rm('/dir', { recursive: true }, function(err) {
-              expect(err).not.to.exist;
-
-              fs.stat('/dir', function(err, stats) {
-                expect(err).to.exist;
-                expect(stats).not.to.exist;
-                done();
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../../..":59,"../../lib/test-utils.js":87,"chai":10}],136:[function(require,module,exports){
-var Filer = require('../../..');
-var util = require('../../lib/test-utils.js');
-var expect = require('chai').expect;
-
-function getTimes(fs, path, callback) {
-  fs.stat(path, function(error, stats) {
-    if(error) throw error;
-    callback({mtime: stats.mtime, atime: stats.atime});
-  });
-}
-
-describe('FileSystemShell.touch', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var shell = util.shell();
-    expect(shell.touch).to.be.a('function');
-  });
-
-  it('should create a new file if path does not exist', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    shell.touch('/newfile', function(error) {
-      if(error) throw error;
-
-      fs.stat('/newfile', function(error, stats) {
-        expect(error).not.to.exist;
-        expect(stats.type).to.equal('FILE');
-        done();
-      });
-    });
-  });
-
-  it('should skip creating a new file if options.updateOnly is true', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-
-    shell.touch('/newfile', { updateOnly: true }, function(error) {
-      if(error) throw error;
-
-      fs.stat('/newfile', function(error, stats) {
-        expect(error).to.exist;
-        done();
-      });
-    });
-  });
-
-  it('should update times if path does exist', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var atime = Date.parse('1 Oct 2000 15:33:22');
-    var mtime = Date.parse('30 Sep 2000 06:43:54');
-
-    fs.open('/newfile', 'w', function (error, fd) {
-      if (error) throw error;
-
-      fs.futimes(fd, atime, mtime, function (error) {
-        if(error) throw error;
-
-        fs.close(fd, function(error) {
-          if(error) throw error;
-
-          getTimes(fs, '/newfile', function(times1) {
-            shell.touch('/newfile', function(error) {
-              expect(error).not.to.exist;
-
-              getTimes(fs, '/newfile', function(times2) {
-                expect(times2.mtime).to.be.above(times1.mtime);
-                expect(times2.atime).to.be.above(times1.atime);
-                done();
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should update times to specified date if path does exist', function(done) {
-    var fs = util.fs();
-    var shell = new fs.Shell();
-    var date = Date.parse('1 Oct 2001 15:33:22');
-
-    fs.open('/newfile', 'w', function (error, fd) {
-      if (error) throw error;
-
-      fs.close(fd, function(error) {
-        if(error) throw error;
-
-        shell.touch('/newfile', { date: date }, function(error) {
-          expect(error).not.to.exist;
-
-          getTimes(fs, '/newfile', function(times) {
-            expect(times.mtime).to.equal(date);
-            done();
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../../..":59,"../../lib/test-utils.js":87,"chai":10}],137:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('node times (atime, mtime, ctime) with mount flags', function() {
-
-  var dirname = "/dir";
-  var filename = "/dir/file";
-
-  function memoryFS(flags, callback) {
-    var name = util.uniqueName();
-    var fs = new Filer.FileSystem({
-      name: name,
-      flags: flags || [],
-      provider: new Filer.FileSystem.providers.Memory(name)
-    }, callback);
-  }
-
-  function createTree(fs, callback) {
-    fs.mkdir(dirname, function(error) {
-      if(error) throw error;
-
-      fs.open(filename, 'w', function(error, fd) {
-        if(error) throw error;
-
-        fs.close(fd, callback);
-      });
-    });
-  }
-
-  function stat(fs, path, callback) {
-    fs.stat(path, function(error, stats) {
-      if(error) throw error;
-
-      callback(stats);
-    });
-  }
-
-  /**
-   * We test the actual time updates in times.spec.js, whereas these just test
-   * the overrides with the mount flags.  The particular fs methods called
-   * are unimportant, but are known to affect the particular times being suppressed.
-   */
-
-  it('should not update ctime when calling fs.rename() with NOCTIME', function(done) {
-    memoryFS(['NOCTIME'], function(error, fs) {
-      var newfilename = filename + '1';
-
-      createTree(fs, function() {
-        stat(fs, filename, function(stats1) {
-
-          fs.rename(filename, newfilename, function(error) {
-            if(error) throw error;
-
-            stat(fs, newfilename, function(stats2) {
-              expect(stats2.ctime).to.equal(stats1.ctime);
-              expect(stats2.mtime).to.equal(stats1.mtime);
-              expect(stats2.atime).to.equal(stats1.atime);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should not update ctime, mtime, atime when calling fs.truncate() with NOCTIME, NOMTIME', function(done) {
-    memoryFS(['NOCTIME', 'NOMTIME'], function(error, fs) {
-      createTree(fs, function() {
-        stat(fs, filename, function(stats1) {
-
-          fs.truncate(filename, 5, function(error) {
-            if(error) throw error;
-
-            stat(fs, filename, function(stats2) {
-              expect(stats2.ctime).to.equal(stats1.ctime);
-              expect(stats2.mtime).to.equal(stats1.mtime);
-              expect(stats2.atime).to.equal(stats1.atime);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should not update mtime when calling fs.truncate() with NOMTIME', function(done) {
-    memoryFS(['NOMTIME'], function(error, fs) {
-      createTree(fs, function() {
-        stat(fs, filename, function(stats1) {
-
-          fs.truncate(filename, 5, function(error) {
-            if(error) throw error;
-
-            stat(fs, filename, function(stats2) {
-              expect(stats2.ctime).to.be.at.least(stats1.ctime);
-              expect(stats2.mtime).to.equal(stats1.mtime);
-              expect(stats2.atime).to.be.at.least(stats1.atime);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],138:[function(require,module,exports){
-var Filer = require('../..');
-var util = require('../lib/test-utils.js');
-var expect = require('chai').expect;
-
-describe('node times (atime, mtime, ctime)', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  var dirname = "/dir";
-  var filename = "/dir/file";
-
-  function createTree(callback) {
-    var fs = util.fs();
-    fs.mkdir(dirname, function(error) {
-      if(error) throw error;
-
-      fs.open(filename, 'w', function(error, fd) {
-        if(error) throw error;
-
-        fs.close(fd, callback);
-      });
-    });
-  }
-
-  function stat(path, callback) {
-    var fs = util.fs();
-    fs.stat(path, function(error, stats) {
-      if(error) throw error;
-
-      callback(stats);
-    });
-  }
-
-  it('should update ctime when calling fs.rename()', function(done) {
-    var fs = util.fs();
-    var newfilename = filename + '1';
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-
-        fs.rename(filename, newfilename, function(error) {
-          if(error) throw error;
-
-          stat(newfilename, function(stats2) {
-            expect(stats2.ctime).to.be.at.least(stats1.ctime);
-            expect(stats2.mtime).to.equal(stats1.mtime);
-            expect(stats2.atime).to.be.at.least(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should update ctime, mtime, atime when calling fs.truncate()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-
-        fs.truncate(filename, 5, function(error) {
-          if(error) throw error;
-
-          stat(filename, function(stats2) {
-            expect(stats2.ctime).to.be.at.least(stats1.ctime);
-            expect(stats2.mtime).to.be.at.least(stats1.mtime);
-            expect(stats2.atime).to.be.at.least(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should update ctime, mtime, atime when calling fs.ftruncate()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-
-        fs.open(filename, 'w', function(error, fd) {
-          if(error) throw error;
-
-          fs.ftruncate(fd, 5, function(error) {
-            if(error) throw error;
-
-            stat(filename, function(stats2) {
-              expect(stats2.ctime).to.be.at.least(stats1.ctime);
-              expect(stats2.mtime).to.be.at.least(stats1.mtime);
-              expect(stats2.atime).to.be.at.least(stats1.atime);
-
-              fs.close(fd, done);
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.stat()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-
-        fs.stat(filename, function(error, stats2) {
-          if(error) throw error;
-
-          expect(stats2.ctime).to.equal(stats1.ctime);
-          expect(stats2.mtime).to.equal(stats1.mtime);
-          expect(stats2.atime).to.equal(stats1.atime);
-          done();
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.fstat()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-
-        fs.open(filename, 'w', function(error, fd) {
-          if(error) throw error;
-
-          fs.fstat(fd, function(error, stats2) {
-            if(error) throw error;
-
-            expect(stats2.ctime).to.equal(stats1.ctime);
-            expect(stats2.mtime).to.equal(stats1.mtime);
-            expect(stats2.atime).to.equal(stats1.atime);
-
-            fs.close(fd, done);
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.lstat()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      fs.link(filename, '/link', function(error) {
-        if(error) throw error;
-
-        stat(filename, function(stats1) {
-          fs.lstat('/link', function(error, stats2) {
-            if(error) throw error;
-
-            expect(stats2.ctime).to.equal(stats1.ctime);
-            expect(stats2.mtime).to.equal(stats1.mtime);
-            expect(stats2.atime).to.equal(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.exists()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-
-        fs.exists(filename, function(exists) {
-          expect(exists).to.be.true;
-
-          fs.stat(filename, function(error, stats2) {
-            if(error) throw error;
-
-            expect(stats2.ctime).to.equal(stats1.ctime);
-            expect(stats2.mtime).to.equal(stats1.mtime);
-            expect(stats2.atime).to.equal(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should update ctime, atime when calling fs.link()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-        fs.link(filename, '/link', function(error) {
-          if(error) throw error;
-
-          stat(filename, function(stats2) {
-            expect(stats2.ctime).to.be.at.least(stats1.ctime);
-            expect(stats2.mtime).to.equal(stats1.mtime);
-            expect(stats2.atime).to.be.at.least(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.symlink()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-        fs.symlink(filename, '/link', function(error) {
-          if(error) throw error;
-
-          stat(filename, function(stats2) {
-            expect(stats2.ctime).to.equal(stats1.ctime);
-            expect(stats2.mtime).to.equal(stats1.mtime);
-            expect(stats2.atime).to.equal(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.readlink()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      fs.symlink(filename, '/link', function(error) {
-        if(error) throw error;
-
-        stat('/link', function(stats1) {
-          fs.readlink('/link', function(error, contents) {
-            if(error) throw error;
-            expect(contents).to.equal(filename);
-
-            stat('/link', function(stats2) {
-              expect(stats2.ctime).to.equal(stats1.ctime);
-              expect(stats2.mtime).to.equal(stats1.mtime);
-              expect(stats2.atime).to.equal(stats1.atime);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should update ctime, atime, mtime of parent dir when calling fs.unlink()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(dirname, function(stats1) {
-        fs.unlink(filename, function(error) {
-          if(error) throw error;
-
-          stat(dirname, function(stats2) {
-            expect(stats2.ctime).to.be.at.least(stats1.ctime);
-            expect(stats2.mtime).to.be.at.least(stats1.mtime);
-            expect(stats2.atime).to.be.at.least(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should update ctime, atime, mtime of parent dir when calling fs.rmdir()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat('/', function(stats1) {
-
-        fs.unlink(filename, function(error) {
-          if(error) throw error;
-
-          fs.rmdir(dirname, function(error) {
-            if(error) throw error;
-
-            stat('/', function(stats2) {
-              expect(stats2.ctime).to.be.at.least(stats1.ctime);
-              expect(stats2.mtime).to.be.at.least(stats1.mtime);
-              expect(stats2.atime).to.be.at.least(stats1.atime);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should update ctime, atime, mtime of parent dir when calling fs.mkdir()', function(done) {
-      var fs = util.fs();
-
-    createTree(function() {
-      stat('/', function(stats1) {
-
-        fs.mkdir('/a', function(error) {
-          if(error) throw error;
-
-          stat('/', function(stats2) {
-            expect(stats2.ctime).to.be.at.least(stats1.ctime);
-            expect(stats2.mtime).to.be.at.least(stats1.mtime);
-            expect(stats2.atime).to.be.at.least(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.close()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      fs.open(filename, 'w', function(error, fd) {
-        if(error) throw error;
-
-        stat(filename, function(stats1) {
-          fs.close(fd, function(error) {
-            if(error) throw error;
-
-            stat(filename, function(stats2) {
-              expect(stats2.ctime).to.equal(stats1.ctime);
-              expect(stats2.mtime).to.equal(stats1.mtime);
-              expect(stats2.atime).to.equal(stats1.atime);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.open()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-        fs.open(filename, 'w', function(error, fd) {
-          if(error) throw error;
-
-          stat(filename, function(stats2) {
-            expect(stats2.ctime).to.equal(stats1.ctime);
-            expect(stats2.mtime).to.equal(stats1.mtime);
-            expect(stats2.atime).to.equal(stats1.atime);
-
-            fs.close(fd, done);
-          });
-        });
-      });
-    });
-  });
-
-  /**
-   * fs.utimes and fs.futimes are tested elsewhere already, skipping
-   */
-
-  it('should update atime, ctime, mtime when calling fs.write()', function(done) {
-    var fs = util.fs();
-    var buffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-
-    createTree(function() {
-      fs.open('/myfile', 'w', function(error, fd) {
-        if(error) throw error;
-
-        stat('/myfile', function(stats1) {
-          fs.write(fd, buffer, 0, buffer.length, 0, function(error, nbytes) {
-            if(error) throw error;
-
-            fs.close(fd, function(error) {
-              if(error) throw error;
-
-              stat('/myfile', function(stats2) {
-                expect(stats2.ctime).to.be.at.least(stats1.ctime);
-                expect(stats2.mtime).to.be.at.least(stats1.mtime);
-                expect(stats2.atime).to.be.at.least(stats1.atime);
-                done();
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.read()', function(done) {
-    var fs = util.fs();
-    var buffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-
-    createTree(function() {
-      fs.open('/myfile', 'w', function(err, fd) {
-        if(err) throw err;
-
-        fs.write(fd, buffer, 0, buffer.length, 0, function(err, nbytes) {
-          if(err) throw err;
-
-          fs.close(fd, function(error) {
-            if(error) throw error;
-
-            fs.open('/myfile', 'r', function(error, fd) {
-              if(error) throw error;
-
-              stat('/myfile', function(stats1) {
-                var buffer2 = new Filer.Buffer(buffer.length);
-                buffer2.fill(0);
-                fs.read(fd, buffer2, 0, buffer2.length, 0, function(err, nbytes) {
-
-                  fs.close(fd, function(error) {
-                    if(error) throw error;
-
-                    stat('/myfile', function(stats2) {
-                      expect(stats2.ctime).to.equal(stats1.ctime);
-                      expect(stats2.mtime).to.equal(stats1.mtime);
-                      expect(stats2.atime).to.equal(stats1.atime);
-                      done();
-                    });
-                  });
-                });
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.readFile()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-        fs.readFile(filename, function(error, data) {
-          if(error) throw error;
-
-          stat(filename, function(stats2) {
-            expect(stats2.ctime).to.equal(stats1.ctime);
-            expect(stats2.mtime).to.equal(stats1.mtime);
-            expect(stats2.atime).to.equal(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should update atime, ctime, mtime when calling fs.writeFile()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-        fs.writeFile(filename, 'data', function(error) {
-          if(error) throw error;
-
-          stat(filename, function(stats2) {
-            expect(stats2.ctime).to.be.at.least(stats1.ctime);
-            expect(stats2.mtime).to.be.at.least(stats1.mtime);
-            expect(stats2.atime).to.be.at.least(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should update atime, ctime, mtime when calling fs.appendFile()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-        fs.appendFile(filename, '...more data', function(error) {
-          if(error) throw error;
-
-          stat(filename, function(stats2) {
-            expect(stats2.ctime).to.be.at.least(stats1.ctime);
-            expect(stats2.mtime).to.be.at.least(stats1.mtime);
-            expect(stats2.atime).to.be.at.least(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should update ctime, atime when calling fs.setxattr()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      stat(filename, function(stats1) {
-        fs.setxattr(filename, 'extra', 'data', function(error) {
-          if(error) throw error;
-
-          stat(filename, function(stats2) {
-            expect(stats2.ctime).to.be.at.least(stats1.ctime);
-            expect(stats2.mtime).to.equal(stats1.mtime);
-            expect(stats2.atime).to.be.at.least(stats1.atime);
-            done();
-          });
-        });
-      });
-    });
-  });
-
-  it('should update ctime, atime when calling fs.fsetxattr()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      fs.open(filename, 'w', function(error, fd) {
-        if(error) throw error;
-
-        stat(filename, function(stats1) {
-          fs.fsetxattr(fd, 'extra', 'data', function(error) {
-            if(error) throw error;
-
-            stat(filename, function(stats2) {
-              expect(stats2.ctime).to.be.at.least(stats1.ctime);
-              expect(stats2.mtime).to.equal(stats1.mtime);
-              expect(stats2.atime).to.be.at.least(stats1.atime);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.getxattr()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      fs.setxattr(filename, 'extra', 'data', function(error) {
-        if(error) throw error;
-
-        stat(filename, function(stats1) {
-          fs.getxattr(filename, 'extra', function(error, value) {
-            if(error) throw error;
-
-            stat(filename, function(stats2) {
-              expect(stats2.ctime).to.equal(stats1.ctime);
-              expect(stats2.mtime).to.equal(stats1.mtime);
-              expect(stats2.atime).to.equal(stats1.atime);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should make no change when calling fs.fgetxattr()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      fs.open(filename, 'w', function(error, fd) {
-        if(error) throw error;
-
-        fs.fsetxattr(fd, 'extra', 'data', function(error) {
-          if(error) throw error;
-
-          stat(filename, function(stats1) {
-            fs.fgetxattr(fd, 'extra', function(error, value) {
-              if(error) throw error;
-
-              stat(filename, function(stats2) {
-                expect(stats2.ctime).to.equal(stats1.ctime);
-                expect(stats2.mtime).to.equal(stats1.mtime);
-                expect(stats2.atime).to.equal(stats1.atime);
-                done();
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should update ctime, atime when calling fs.removexattr()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      fs.setxattr(filename, 'extra', 'data', function(error) {
-        if(error) throw error;
-
-        stat(filename, function(stats1) {
-          fs.removexattr(filename, 'extra', function(error) {
-            if(error) throw error;
-
-            stat(filename, function(stats2) {
-              expect(stats2.ctime).to.be.at.least(stats1.ctime);
-              expect(stats2.mtime).to.equal(stats1.mtime);
-              expect(stats2.atime).to.be.at.least(stats1.atime);
-              done();
-            });
-          });
-        });
-      });
-    });
-  });
-
-  it('should update ctime, atime when calling fs.fremovexattr()', function(done) {
-    var fs = util.fs();
-
-    createTree(function() {
-      fs.open(filename, 'w', function(error, fd) {
-        if(error) throw error;
-
-        fs.fsetxattr(fd, 'extra', 'data', function(error) {
-          if(error) throw error;
-
-          stat(filename, function(stats1) {
-            fs.fremovexattr(fd, 'extra', function(error) {
-              if(error) throw error;
-
-              stat(filename, function(stats2) {
-                expect(stats2.ctime).to.be.at.least(stats1.ctime);
-                expect(stats2.mtime).to.equal(stats1.mtime);
-                expect(stats2.atime).to.be.at.least(stats1.atime);
-                done();
-              });
-            });
-          });
-        });
-      });
-    });
-  });
-});
-
-},{"../..":59,"../lib/test-utils.js":87,"chai":10}],139:[function(require,module,exports){
-var Path = require('../..').Path;
-var expect = require('chai').expect;
-
-describe('Path.normalize and trailing slashes', function() {
-
-  it('should remove trailing slashes as expected', function() {
-    var strip = Path.normalize;
-
-    expect(strip('/')).to.equal('/');
-    expect(strip('/foo/')).to.equal('/foo');
-    expect(strip('/foo//')).to.equal('/foo');
-    expect(strip('/foo/bar/baz/')).to.equal('/foo/bar/baz');
-  });
-
-});
-
-},{"../..":59,"chai":10}]},{},[84]);
diff --git a/dist/filer.js b/dist/filer.js
index 1fdc190..4d7c27e 100644
--- a/dist/filer.js
+++ b/dist/filer.js
@@ -103,7 +103,7 @@ parcelRequire = (function (modules, cache, entry, globalName) {
 
   // Override the current require with this new one
   return newRequire;
-})({14:[function(require,module,exports) {
+})({"96cB":[function(require,module,exports) {
 var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
 
 // Cherry-picked bits of underscore.js, lodash.js
@@ -202,7 +202,7 @@ function nodash(value) {
 }
 
 module.exports = nodash;
-},{}],4:[function(require,module,exports) {
+},{}],"UzoP":[function(require,module,exports) {
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -441,7 +441,7 @@ module.exports = {
   addTrailing: addTrailing,
   removeTrailing: removeTrailing
 };
-},{}],15:[function(require,module,exports) {
+},{}],"3zBM":[function(require,module,exports) {
 function guid() {
   return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
     var r = Math.random() * 16 | 0,
@@ -469,7 +469,7 @@ module.exports = {
   u8toArray: u8toArray,
   nop: nop
 };
-},{}],16:[function(require,module,exports) {
+},{}],"iJA9":[function(require,module,exports) {
 var O_READ = 'READ';
 var O_WRITE = 'WRITE';
 var O_CREATE = 'CREATE';
@@ -479,39 +479,10 @@ var O_APPEND = 'APPEND';
 var XATTR_CREATE = 'CREATE';
 var XATTR_REPLACE = 'REPLACE';
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-},{}],5:[function(require,module,exports){
-/*
- * base64-arraybuffer
- * https://github.com/niklasvh/base64-arraybuffer
- *
- * Copyright (c) 2012 Niklas von Hertzen
- * Licensed under the MIT license.
- */
-(function(){
-  "use strict";
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 module.exports = {
   FILE_SYSTEM_NAME: 'local',
 
-<<<<<<< HEAD
-  var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-  // Use a lookup table to find the index.
-  var lookup = new Uint8Array(256);
-  for (var i = 0; i < chars.length; i++) {
-    lookup[chars.charCodeAt(i)] = i;
-  }
-
-  exports.encode = function(arraybuffer) {
-    var bytes = new Uint8Array(arraybuffer),
-    i, len = bytes.length, base64 = "";
-=======
   FILE_STORE_NAME: 'files',
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
   IDB_RO: 'readonly',
   IDB_RW: 'readwrite',
@@ -520,10 +491,19 @@ module.exports = {
   WSQL_SIZE: 5 * 1024 * 1024,
   WSQL_DESC: "FileSystem Storage",
 
-  MODE_FILE: 'FILE',
-  MODE_DIRECTORY: 'DIRECTORY',
-  MODE_SYMBOLIC_LINK: 'SYMLINK',
-  MODE_META: 'META',
+  NODE_TYPE_FILE: 'FILE',
+  NODE_TYPE_DIRECTORY: 'DIRECTORY',
+  NODE_TYPE_SYMBOLIC_LINK: 'SYMLINK',
+  NODE_TYPE_META: 'META',
+
+  S_IFREG: 0x8000,
+  S_IFDIR: 0x4000,
+  S_IFLNK: 0xA000,
+
+  DEFAULT_DIR_PERMISSIONS: 0x1ED, // 755
+  DEFAULT_FILE_PERMISSIONS: 0x1A4, // 644
+  FULL_READ_WRITE_EXEC_PERMISSIONS: 0x1FF, // 777
+  READ_WRITE_PERMISSIONS: 0x1B6, /// 666
 
   SYMLOOP_MAX: 10,
 
@@ -532,19 +512,11 @@ module.exports = {
 
   ROOT_DIRECTORY_NAME: '/', // basename(normalize(path))
 
-<<<<<<< HEAD
-    for (i = 0; i < len; i+=4) {
-      encoded1 = lookup[base64.charCodeAt(i)];
-      encoded2 = lookup[base64.charCodeAt(i+1)];
-      encoded3 = lookup[base64.charCodeAt(i+2)];
-      encoded4 = lookup[base64.charCodeAt(i+3)];
-=======
   // FS Mount Flags
   FS_FORMAT: 'FORMAT',
   FS_NOCTIME: 'NOCTIME',
   FS_NOMTIME: 'NOMTIME',
   FS_NODUPEIDCHECK: 'FS_NODUPEIDCHECK',
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
   // FS File Open Flags
   O_READ: O_READ,
@@ -554,11 +526,6 @@ module.exports = {
   O_TRUNCATE: O_TRUNCATE,
   O_APPEND: O_APPEND,
 
-<<<<<<< HEAD
-    return arraybuffer;
-  };
-})();
-=======
   O_FLAGS: {
     'r': [O_READ],
     'r+': [O_READ, O_WRITE],
@@ -571,161 +538,7 @@ module.exports = {
     'ax': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_APPEND],
     'ax+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_APPEND]
   },
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-},{}],6:[function(require,module,exports){
-var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
-
-;(function (exports) {
-	'use strict';
-
-  var Arr = (typeof Uint8Array !== 'undefined')
-    ? Uint8Array
-    : Array
-
-	var PLUS   = '+'.charCodeAt(0)
-	var SLASH  = '/'.charCodeAt(0)
-	var NUMBER = '0'.charCodeAt(0)
-	var LOWER  = 'a'.charCodeAt(0)
-	var UPPER  = 'A'.charCodeAt(0)
-	var PLUS_URL_SAFE = '-'.charCodeAt(0)
-	var SLASH_URL_SAFE = '_'.charCodeAt(0)
-
-	function decode (elt) {
-		var code = elt.charCodeAt(0)
-		if (code === PLUS ||
-		    code === PLUS_URL_SAFE)
-			return 62 // '+'
-		if (code === SLASH ||
-		    code === SLASH_URL_SAFE)
-			return 63 // '/'
-		if (code < NUMBER)
-			return -1 //no match
-		if (code < NUMBER + 10)
-			return code - NUMBER + 26 + 26
-		if (code < UPPER + 26)
-			return code - UPPER
-		if (code < LOWER + 26)
-			return code - LOWER + 26
-	}
-
-	function b64ToByteArray (b64) {
-		var i, j, l, tmp, placeHolders, arr
-
-		if (b64.length % 4 > 0) {
-			throw new Error('Invalid string. Length must be a multiple of 4')
-		}
-
-		// the number of equal signs (place holders)
-		// if there are two placeholders, than the two characters before it
-		// represent one byte
-		// if there is only one, then the three characters before it represent 2 bytes
-		// this is just a cheap hack to not do indexOf twice
-		var len = b64.length
-		placeHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0
-
-		// base64 is 4/3 + up to two characters of the original data
-		arr = new Arr(b64.length * 3 / 4 - placeHolders)
-
-		// if there are placeholders, only get up to the last complete 4 chars
-		l = placeHolders > 0 ? b64.length - 4 : b64.length
-
-		var L = 0
-
-		function push (v) {
-			arr[L++] = v
-		}
-
-		for (i = 0, j = 0; i < l; i += 4, j += 3) {
-			tmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))
-			push((tmp & 0xFF0000) >> 16)
-			push((tmp & 0xFF00) >> 8)
-			push(tmp & 0xFF)
-		}
-
-		if (placeHolders === 2) {
-			tmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)
-			push(tmp & 0xFF)
-		} else if (placeHolders === 1) {
-			tmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)
-			push((tmp >> 8) & 0xFF)
-			push(tmp & 0xFF)
-		}
-
-		return arr
-	}
-
-	function uint8ToBase64 (uint8) {
-		var i,
-			extraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes
-			output = "",
-			temp, length
-
-		function encode (num) {
-			return lookup.charAt(num)
-		}
-
-		function tripletToBase64 (num) {
-			return encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)
-		}
-
-		// go through the array every three bytes, we'll deal with trailing stuff later
-		for (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {
-			temp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
-			output += tripletToBase64(temp)
-		}
-
-		// pad the end with zeros, but make sure to not forget the extra bytes
-		switch (extraBytes) {
-			case 1:
-				temp = uint8[uint8.length - 1]
-				output += encode(temp >> 2)
-				output += encode((temp << 4) & 0x3F)
-				output += '=='
-				break
-			case 2:
-				temp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])
-				output += encode(temp >> 10)
-				output += encode((temp >> 4) & 0x3F)
-				output += encode((temp << 2) & 0x3F)
-				output += '='
-				break
-		}
-
-		return output
-	}
-
-	exports.toByteArray = b64ToByteArray
-	exports.fromByteArray = uint8ToBase64
-}(typeof exports === 'undefined' ? (this.base64js = {}) : exports))
-
-},{}],7:[function(require,module,exports){
-(function (global){
-/*!
- * The buffer module from node.js, for the browser.
- *
- * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
- * @license  MIT
- */
-/* eslint-disable no-proto */
-
-'use strict'
-
-var base64 = require('base64-js')
-var ieee754 = require('ieee754')
-var isArray = require('isarray')
-
-exports.Buffer = Buffer
-exports.SlowBuffer = SlowBuffer
-exports.INSPECT_MAX_BYTES = 50
-Buffer.poolSize = 8192 // not used by this implementation
-
-var rootParent = {}
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   XATTR_CREATE: XATTR_CREATE,
   XATTR_REPLACE: XATTR_REPLACE,
 
@@ -744,70 +557,56 @@ var rootParent = {}
   ENVIRONMENT: {
     TMP: '/tmp',
     PATH: ''
+  },
+
+  // Duplicate Node's fs.constants
+  fsConstants: {
+    O_RDONLY: 0,
+    O_WRONLY: 1,
+    O_RDWR: 2,
+    S_IFMT: 61440,
+    S_IFREG: 32768,
+    S_IFDIR: 16384,
+    S_IFCHR: 8192,
+    S_IFBLK: 24576,
+    S_IFIFO: 4096,
+    S_IFLNK: 40960,
+    S_IFSOCK: 49152,
+    O_CREAT: 512,
+    O_EXCL: 2048,
+    O_NOCTTY: 131072,
+    O_TRUNC: 1024,
+    O_APPEND: 8,
+    O_DIRECTORY: 1048576,
+    O_NOFOLLOW: 256,
+    O_SYNC: 128,
+    O_DSYNC: 4194304,
+    O_SYMLINK: 2097152,
+    O_NONBLOCK: 4,
+    S_IRWXU: 448,
+    S_IRUSR: 256,
+    S_IWUSR: 128,
+    S_IXUSR: 64,
+    S_IRWXG: 56,
+    S_IRGRP: 32,
+    S_IWGRP: 16,
+    S_IXGRP: 8,
+    S_IRWXO: 7,
+    S_IROTH: 4,
+    S_IWOTH: 2,
+    S_IXOTH: 1,
+    F_OK: 0,
+    R_OK: 4,
+    W_OK: 2,
+    X_OK: 1,
+    UV_FS_COPYFILE_EXCL: 1,
+    COPYFILE_EXCL: 1
   }
 };
-},{}],5:[function(require,module,exports) {
+},{}],"p8GN":[function(require,module,exports) {
 var errors = {};
 [
 /**
-<<<<<<< HEAD
-<<<<<<< HEAD
- * If `Buffer.TYPED_ARRAY_SUPPORT`:
- *   === true    Use Uint8Array implementation (fastest)
- *   === false   Use Object implementation (most compatible, even IE6)
- *
- * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
- * Opera 11.6+, iOS 4.2+.
- *
- * Due to various browser bugs, sometimes the Object implementation will be used even
- * when the browser supports typed arrays.
- *
- * Note:
- *
- *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
- *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
- *
- *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property
- *     on objects.
- *
- *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
- *
- *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
- *     incorrect length in some situations.
-
- * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
- * get the Object implementation, which is slower but behaves correctly.
- */
-Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
-  ? global.TYPED_ARRAY_SUPPORT
-  : typedArraySupport()
-
-function typedArraySupport () {
-  function Bar () {}
-  try {
-    var arr = new Uint8Array(1)
-    arr.foo = function () { return 42 }
-    arr.constructor = Bar
-    return arr.foo() === 42 && // typed array instances can be augmented
-        arr.constructor === Bar && // constructor can be set
-        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
-        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
-  } catch (e) {
-    return false
-  }
-<<<<<<< HEAD
-}
-
-function kMaxLength () {
-  return Buffer.TYPED_ARRAY_SUPPORT
-    ? 0x7fffffff
-    : 0x3fffffff
-}
-=======
-})()
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
  * node.js errors - we only use some of these, add as needed.
  */
 //'-1:UNKNOWN:unknown error',
@@ -868,51 +667,10 @@ function kMaxLength () {
 //'57:ENODEV:no such device',
 //'58:ESPIPE:invalid seek',
 //'59:ECANCELED:operation canceled',
-<<<<<<< HEAD
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
 /**
  * Filer specific errors
  */
-<<<<<<< HEAD
-<<<<<<< HEAD
-function Buffer (arg) {
-  if (!(this instanceof Buffer)) {
-    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.
-    if (arguments.length > 1) return new Buffer(arg, arguments[1])
-    return new Buffer(arg)
-  }
-
-  if (!Buffer.TYPED_ARRAY_SUPPORT) {
-    this.length = 0
-    this.parent = undefined
-  }
-
-  // Common case.
-  if (typeof arg === 'number') {
-    return fromNumber(this, arg)
-  }
-
-  // Slightly less common case.
-  if (typeof arg === 'string') {
-    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')
-  }
-
-  // Unusual.
-  return fromObject(this, arg)
-}
-
-function fromNumber (that, length) {
-  that = allocate(that, length < 0 ? 0 : checked(length) | 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) {
-    for (var i = 0; i < length; i++) {
-      that[i] = 0
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 '1000:ENOTMOUNTED:not mounted', '1001:EFILESYSTEMERROR:missing super node, use \'FORMAT\' flag to format filesystem.', '1002:ENOATTR:attribute does not exist'].forEach(function (e) {
   e = e.split(':');
   var errno = +e[0];
@@ -943,7 +701,7 @@ function fromNumber (that, length) {
 });
 
 module.exports = errors;
-},{}],37:[function(require,module,exports) {
+},{}],"yh9p":[function(require,module,exports) {
 'use strict'
 
 exports.byteLength = byteLength
@@ -972,21 +730,10 @@ function getLens (b64) {
     throw new Error('Invalid string. Length must be a multiple of 4')
   }
 
-<<<<<<< HEAD
-  if (typeof ArrayBuffer !== 'undefined') {
-    if (object.buffer instanceof ArrayBuffer) {
-      return fromTypedArray(that, object)
-    }
-    if (object instanceof ArrayBuffer) {
-      return fromArrayBuffer(that, object)
-    }
-  }
-=======
   // Trim off extra bytes after placeholder bytes are found
   // See: https://github.com/beatgammit/base64-js/issues/42
   var validLen = b64.indexOf('=')
   if (validLen === -1) validLen = len
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
   var placeHoldersLen = validLen === len
     ? 0
@@ -1013,30 +760,7 @@ function toByteArray (b64) {
   var validLen = lens[0]
   var placeHoldersLen = lens[1]
 
-<<<<<<< HEAD
-function fromArrayBuffer (that, array) {
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    array.byteLength
-    that = Buffer._augment(new Uint8Array(array))
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    that = fromTypedArray(that, new Uint8Array(array))
-  }
-  return that
-}
-
-function fromArrayLike (that, array) {
-  var length = checked(array.length) | 0
-  that = allocate(that, length)
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
-=======
   var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
   var curByte = 0
 
@@ -1056,40 +780,6 @@ function fromArrayLike (that, array) {
     arr[curByte++] = tmp & 0xFF
   }
 
-<<<<<<< HEAD
-if (Buffer.TYPED_ARRAY_SUPPORT) {
-  Buffer.prototype.__proto__ = Uint8Array.prototype
-  Buffer.__proto__ = Uint8Array
-} else {
-  // pre-set for values that may exist in the future
-  Buffer.prototype.length = undefined
-  Buffer.prototype.parent = undefined
-}
-
-function allocate (that, length) {
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    that = Buffer._augment(new Uint8Array(length))
-    that.__proto__ = Buffer.prototype
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    that.length = length
-    that._isBuffer = true
-  }
-
-  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1
-  if (fromPool) that.parent = rootParent
-
-  return that
-}
-
-function checked (length) {
-  // Note: cannot use `length < kMaxLength` here because that fails when
-  // length is NaN (which is otherwise coerced to zero.)
-  if (length >= kMaxLength()) {
-    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
-                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
-=======
   if (placeHoldersLen === 2) {
     tmp =
       (revLookup[b64.charCodeAt(i)] << 2) |
@@ -1104,7 +794,6 @@ function checked (length) {
       (revLookup[b64.charCodeAt(i + 2)] >> 2)
     arr[curByte++] = (tmp >> 8) & 0xFF
     arr[curByte++] = tmp & 0xFF
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   }
 
   return arr
@@ -1165,7 +854,7 @@ function fromByteArray (uint8) {
   return parts.join('')
 }
 
-},{}],38:[function(require,module,exports) {
+},{}],"JgNJ":[function(require,module,exports) {
 exports.read = function (buffer, offset, isLE, mLen, nBytes) {
   var e, m
   var eLen = (nBytes * 8) - mLen - 1
@@ -1209,13 +898,7 @@ exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
   var d = isLE ? 1 : -1
   var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
 
-<<<<<<< HEAD
-  if (list.length === 0) {
-    return new Buffer(0)
-  }
-=======
   value = Math.abs(value)
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
   if (isNaN(value) || value === Infinity) {
     m = isNaN(value) ? 1 : 0
@@ -1248,49 +931,6 @@ exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
     }
   }
 
-<<<<<<< HEAD
-function byteLength (string, encoding) {
-  if (typeof string !== 'string') string = '' + string
-
-  var len = string.length
-  if (len === 0) return 0
-
-  // Use a for loop to avoid recursion
-  var loweredCase = false
-  for (;;) {
-    switch (encoding) {
-      case 'ascii':
-      case 'binary':
-      // Deprecated
-      case 'raw':
-      case 'raws':
-        return len
-      case 'utf8':
-      case 'utf-8':
-        return utf8ToBytes(string).length
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return len * 2
-      case 'hex':
-        return len >>> 1
-      case 'base64':
-        return base64ToBytes(string).length
-      default:
-        if (loweredCase) return utf8ToBytes(string).length // assume utf8
-        encoding = ('' + encoding).toLowerCase()
-        loweredCase = true
-    }
-  }
-=======
-// base64 is 4/3 + up to two characters of the original data
-function byteLength (b64) {
-  var lens = getLens(b64)
-  var validLen = lens[0]
-  var placeHoldersLen = lens[1]
-  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
-=======
   for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
   e = (e << mLen) | m
@@ -1298,32 +938,16 @@ function byteLength (b64) {
   for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
 
   buffer[offset + i - d] |= s * 128
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 }
 
-},{}],39:[function(require,module,exports) {
+},{}],"REa7":[function(require,module,exports) {
 var toString = {}.toString;
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-function slowToString (encoding, start, end) {
-=======
-<<<<<<< HEAD
-// pre-set for values that may exist in the future
-Buffer.prototype.length = undefined
-Buffer.prototype.parent = undefined
-
-// toString(encoding, start=0, end=buffer.length)
-Buffer.prototype.toString = function toString (encoding, start, end) {
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  var loweredCase = false
-=======
 module.exports = Array.isArray || function (arr) {
   return toString.call(arr) == '[object Array]';
 };
 
-},{}],13:[function(require,module,exports) {
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
+},{}],"dskh":[function(require,module,exports) {
 
 var global = arguments[3];
 /*!
@@ -1411,25 +1035,7 @@ function createBuffer (that, length) {
     that.length = length
   }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-Buffer.prototype.toString = function toString () {
-  var length = this.length | 0
-  if (length === 0) return ''
-  if (arguments.length === 0) return utf8Slice(this, 0, length)
-  return slowToString.apply(this, arguments)
-}
-
-=======
-<<<<<<< HEAD
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-Buffer.prototype.equals = function equals (b) {
-  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
-  if (this === b) return true
-  return Buffer.compare(this, b) === 0
-=======
   return that
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 }
 
 /**
@@ -1483,27 +1089,6 @@ function from (that, value, encodingOrOffset, length) {
   return fromObject(that, value)
 }
 
-<<<<<<< HEAD
-// `get` is deprecated
-Buffer.prototype.get = function get (offset) {
-  console.log('.get() is deprecated. Access using array indexes instead.')
-  return this.readUInt8(offset)
-}
-
-// `set` is deprecated
-Buffer.prototype.set = function set (v, offset) {
-  console.log('.set() is deprecated. Access using array indexes instead.')
-  return this.writeUInt8(v, offset)
-}
-=======
-  if (placeHoldersLen === 1) {
-    tmp =
-      (revLookup[b64.charCodeAt(i)] << 10) |
-      (revLookup[b64.charCodeAt(i + 1)] << 4) |
-      (revLookup[b64.charCodeAt(i + 2)] >> 2)
-    arr[curByte++] = (tmp >> 8) & 0xFF
-    arr[curByte++] = tmp & 0xFF
-=======
 /**
  * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
  * if value is a number.
@@ -1526,7 +1111,6 @@ if (Buffer.TYPED_ARRAY_SUPPORT) {
       value: null,
       configurable: true
     })
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   }
 }
 
@@ -1975,82 +1559,8 @@ Buffer.prototype.compare = function compare (target, start, end, thisStart, this
     thisEnd = this.length
   }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-function utf8Slice (buf, start, end) {
-  end = Math.min(buf.length, end)
-  var res = []
-
-  var i = start
-  while (i < end) {
-    var firstByte = buf[i]
-    var codePoint = null
-    var bytesPerSequence = (firstByte > 0xEF) ? 4
-      : (firstByte > 0xDF) ? 3
-      : (firstByte > 0xBF) ? 2
-      : 1
-
-    if (i + bytesPerSequence <= end) {
-      var secondByte, thirdByte, fourthByte, tempCodePoint
-
-      switch (bytesPerSequence) {
-        case 1:
-          if (firstByte < 0x80) {
-            codePoint = firstByte
-          }
-          break
-        case 2:
-          secondByte = buf[i + 1]
-          if ((secondByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
-            if (tempCodePoint > 0x7F) {
-              codePoint = tempCodePoint
-            }
-          }
-          break
-        case 3:
-          secondByte = buf[i + 1]
-          thirdByte = buf[i + 2]
-          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
-            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
-              codePoint = tempCodePoint
-            }
-          }
-          break
-        case 4:
-          secondByte = buf[i + 1]
-          thirdByte = buf[i + 2]
-          fourthByte = buf[i + 3]
-          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
-            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
-              codePoint = tempCodePoint
-            }
-          }
-      }
-    }
-
-    if (codePoint === null) {
-      // we did not generate a valid codePoint so insert a
-      // replacement char (U+FFFD) and advance only 1 byte
-      codePoint = 0xFFFD
-      bytesPerSequence = 1
-    } else if (codePoint > 0xFFFF) {
-      // encode to utf16 (surrogate pair dance)
-      codePoint -= 0x10000
-      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
-      codePoint = 0xDC00 | codePoint & 0x3FF
-=======
-function assertSize (size) {
-  if (typeof size !== 'number') {
-    throw new TypeError('"size" argument must be a number')
-  } else if (size < 0) {
-    throw new RangeError('"size" argument must not be negative')
-=======
   if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
     throw new RangeError('out of range index')
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   }
 
   if (thisStart >= thisEnd && start >= end) {
@@ -2059,81 +1569,14 @@ function assertSize (size) {
   if (thisStart >= thisEnd) {
     return -1
   }
-<<<<<<< HEAD
-  return createBuffer(that, size)
-}
-
-/**
- * Creates a new filled Buffer instance.
- * alloc(size[, fill[, encoding]])
- **/
-Buffer.alloc = function (size, fill, encoding) {
-  return alloc(null, size, fill, encoding)
-}
-
-function allocUnsafe (that, size) {
-  assertSize(size)
-  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) {
-    for (var i = 0; i < size; ++i) {
-      that[i] = 0
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-    }
-
-    res.push(codePoint)
-    i += bytesPerSequence
-  }
-
-  return decodeCodePointsArray(res)
-}
-
-// Based on http://stackoverflow.com/a/22747272/680742, the browser with
-// the lowest limit is Chrome, with 0x10000 args.
-// We go 1 magnitude less, for safety
-var MAX_ARGUMENTS_LENGTH = 0x1000
-
-function decodeCodePointsArray (codePoints) {
-  var len = codePoints.length
-  if (len <= MAX_ARGUMENTS_LENGTH) {
-    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
-=======
   if (start >= end) {
     return 1
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  // Decode in chunks to avoid "call stack size exceeded".
-  var res = ''
-  var i = 0
-  while (i < len) {
-    res += String.fromCharCode.apply(
-      String,
-      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
-    )
-  }
-  return res
-=======
-/**
- * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
- * */
-Buffer.allocUnsafe = function (size) {
-  return allocUnsafe(null, size)
-}
-/**
- * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
- */
-Buffer.allocUnsafeSlow = function (size) {
-  return allocUnsafe(null, size)
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-}
-=======
   start >>>= 0
   end >>>= 0
   thisStart >>>= 0
   thisEnd >>>= 0
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
   if (this === target) return 0
 
@@ -2984,107 +2427,7 @@ Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert)
   return offset + 4
 }
 
-<<<<<<< HEAD
-  var thisCopy = this.slice(thisStart, thisEnd)
-  var targetCopy = target.slice(start, end)
-
-  for (var i = 0; i < len; ++i) {
-    if (thisCopy[i] !== targetCopy[i]) {
-      x = thisCopy[i]
-      y = targetCopy[i]
-      break
-    }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  }
-}
-
-<<<<<<< HEAD
-Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset + 3] = (value >>> 24)
-    this[offset + 2] = (value >>> 16)
-    this[offset + 1] = (value >>> 8)
-    this[offset] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, true)
-=======
-  if (x < y) return -1
-  if (y < x) return 1
-  return 0
-}
-
-// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
-// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
-//
-// Arguments:
-// - buffer - a Buffer to search
-// - val - a string, Buffer, or number
-// - byteOffset - an index into `buffer`; will be clamped to an int32
-// - encoding - an optional encoding, relevant is val is a string
-// - dir - true for indexOf, false for lastIndexOf
-function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
-  // Empty buffer means no match
-  if (buffer.length === 0) return -1
-
-  // Normalize byteOffset
-  if (typeof byteOffset === 'string') {
-    encoding = byteOffset
-    byteOffset = 0
-  } else if (byteOffset > 0x7fffffff) {
-    byteOffset = 0x7fffffff
-  } else if (byteOffset < -0x80000000) {
-    byteOffset = -0x80000000
-  }
-  byteOffset = +byteOffset  // Coerce to Number.
-  if (isNaN(byteOffset)) {
-    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
-    byteOffset = dir ? 0 : (buffer.length - 1)
-  }
-
-  // Normalize byteOffset: negative offsets start from the end of the buffer
-  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
-  if (byteOffset >= buffer.length) {
-    if (dir) return -1
-    else byteOffset = buffer.length - 1
-  } else if (byteOffset < 0) {
-    if (dir) byteOffset = 0
-    else return -1
-  }
-
-  // Normalize val
-  if (typeof val === 'string') {
-    val = Buffer.from(val, encoding)
-  }
-
-  // Finally, search either indexOf (if dir is true) or lastIndexOf
-  if (Buffer.isBuffer(val)) {
-    // Special case: looking for empty string/buffer always fails
-    if (val.length === 0) {
-      return -1
-    }
-    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
-  } else if (typeof val === 'number') {
-    val = val & 0xFF // Search for a byte value [0-255]
-    if (Buffer.TYPED_ARRAY_SUPPORT &&
-        typeof Uint8Array.prototype.indexOf === 'function') {
-      if (dir) {
-        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
-      } else {
-        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
-      }
-    }
-    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  }
-
-<<<<<<< HEAD
-Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
-=======
 Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   value = +value
   offset = offset | 0
   if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
@@ -3129,50 +2472,6 @@ function writeDouble (buf, value, offset, littleEndian, noAssert) {
   return offset + 8
 }
 
-<<<<<<< HEAD
-Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
-  if (value < 0) value = 0xff + value + 1
-  this[offset] = (value & 0xff)
-  return offset + 1
-}
-
-Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value & 0xff)
-    this[offset + 1] = (value >>> 8)
-  } else {
-    objectWriteUInt16(this, value, offset, true)
-  }
-  return offset + 2
-}
-
-Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 8)
-    this[offset + 1] = (value & 0xff)
-  } else {
-    objectWriteUInt16(this, value, offset, false)
-=======
-  throw new TypeError('val must be string, number or Buffer')
-}
-
-<<<<<<< HEAD
-=======
-function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
-  var indexSize = 1
-  var arrLength = arr.length
-  var valLength = val.length
-=======
 Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
   return writeDouble(this, value, offset, true, noAssert)
 }
@@ -3192,7 +2491,6 @@ Buffer.prototype.copy = function copy (target, targetStart, start, end) {
   // Copy 0 bytes; we're done
   if (end === start) return 0
   if (target.length === 0 || this.length === 0) return 0
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
   // Fatal error conditions
   if (targetStart < 0) {
@@ -3291,50 +2589,11 @@ Buffer.prototype.fill = function fill (val, start, end, encoding) {
     }
   }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-<<<<<<< HEAD
-    this[offset] = (value & 0xff)
-=======
-    this[offset] = value
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-    this[offset + 1] = (value >>> 8)
-    this[offset + 2] = (value >>> 16)
-    this[offset + 3] = (value >>> 24)
-  } else {
-    objectWriteUInt32(this, value, offset, true)
-  }
-  return offset + 4
-}
-
-Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
-  if (value < 0) value = 0xffffffff + value + 1
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 24)
-    this[offset + 1] = (value >>> 16)
-    this[offset + 2] = (value >>> 8)
-    this[offset + 3] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, false)
-  }
-  return offset + 4
-}
-=======
   return this
 }
 
 // HELPER FUNCTIONS
 // ================
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
 var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
 
@@ -3405,20 +2664,6 @@ function utf8ToBytes (string, units) {
       if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
     }
 
-<<<<<<< HEAD
-  var len = end - start
-  var i
-
-  if (this === target && start < targetStart && targetStart < end) {
-    // descending copy from end
-    for (i = len - 1; i >= 0; i--) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
-    // ascending copy from start
-    for (i = 0; i < len; i++) {
-      target[i + targetStart] = this[i + start]
-=======
     leadSurrogate = null
 
     // encode utf8
@@ -3448,7 +2693,6 @@ function utf8ToBytes (string, units) {
       )
     } else {
       throw new Error('Invalid code point')
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
     }
   }
 
@@ -3496,7 +2740,7 @@ function isnan (val) {
   return val !== val // eslint-disable-line no-self-compare
 }
 
-},{"base64-js":37,"ieee754":38,"isarray":39,"buffer":13}],3:[function(require,module,exports) {
+},{"base64-js":"yh9p","ieee754":"JgNJ","isarray":"REa7","buffer":"dskh"}],"xfwq":[function(require,module,exports) {
 var Buffer = require("buffer").Buffer;
 function FilerBuffer(subject, encoding, nonZero) {
 
@@ -3521,7 +2765,7 @@ Object.keys(Buffer).forEach(function (p) {
 });
 
 module.exports = FilerBuffer;
-},{"buffer":13}],53:[function(require,module,exports) {
+},{"buffer":"dskh"}],"QO4x":[function(require,module,exports) {
 var global = arguments[3];
 var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
 var FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;
@@ -3662,124 +2906,6 @@ IndexedDB.prototype.open = function (callback) {
       db.createObjectStore(FILE_STORE_NAME);
     };
 
-<<<<<<< HEAD
-      switch (bytesPerSequence) {
-        case 1:
-          if (firstByte < 0x80) {
-            codePoint = firstByte
-          }
-          break
-        case 2:
-          secondByte = buf[i + 1]
-          if ((secondByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
-            if (tempCodePoint > 0x7F) {
-              codePoint = tempCodePoint
-            }
-          }
-          break
-        case 3:
-          secondByte = buf[i + 1]
-          thirdByte = buf[i + 2]
-          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
-            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
-              codePoint = tempCodePoint
-            }
-          }
-          break
-        case 4:
-          secondByte = buf[i + 1]
-          thirdByte = buf[i + 2]
-          fourthByte = buf[i + 3]
-          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
-            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
-              codePoint = tempCodePoint
-            }
-          }
-      }
-    }
-
-    if (codePoint === null) {
-      // we did not generate a valid codePoint so insert a
-      // replacement char (U+FFFD) and advance only 1 byte
-      codePoint = 0xFFFD
-      bytesPerSequence = 1
-    } else if (codePoint > 0xFFFF) {
-      // encode to utf16 (surrogate pair dance)
-      codePoint -= 0x10000
-      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
-      codePoint = 0xDC00 | codePoint & 0x3FF
-    }
-
-<<<<<<< HEAD
-/**
- * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods
- */
-Buffer._augment = function _augment (arr) {
-  arr.constructor = Buffer
-  arr._isBuffer = true
-
-  // save reference to original Uint8Array set method before overwriting
-  arr._set = arr.set
-
-  // deprecated
-  arr.get = BP.get
-  arr.set = BP.set
-
-  arr.write = BP.write
-  arr.toString = BP.toString
-  arr.toLocaleString = BP.toString
-  arr.toJSON = BP.toJSON
-  arr.equals = BP.equals
-  arr.compare = BP.compare
-  arr.indexOf = BP.indexOf
-  arr.copy = BP.copy
-  arr.slice = BP.slice
-  arr.readUIntLE = BP.readUIntLE
-  arr.readUIntBE = BP.readUIntBE
-  arr.readUInt8 = BP.readUInt8
-  arr.readUInt16LE = BP.readUInt16LE
-  arr.readUInt16BE = BP.readUInt16BE
-  arr.readUInt32LE = BP.readUInt32LE
-  arr.readUInt32BE = BP.readUInt32BE
-  arr.readIntLE = BP.readIntLE
-  arr.readIntBE = BP.readIntBE
-  arr.readInt8 = BP.readInt8
-  arr.readInt16LE = BP.readInt16LE
-  arr.readInt16BE = BP.readInt16BE
-  arr.readInt32LE = BP.readInt32LE
-  arr.readInt32BE = BP.readInt32BE
-  arr.readFloatLE = BP.readFloatLE
-  arr.readFloatBE = BP.readFloatBE
-  arr.readDoubleLE = BP.readDoubleLE
-  arr.readDoubleBE = BP.readDoubleBE
-  arr.writeUInt8 = BP.writeUInt8
-  arr.writeUIntLE = BP.writeUIntLE
-  arr.writeUIntBE = BP.writeUIntBE
-  arr.writeUInt16LE = BP.writeUInt16LE
-  arr.writeUInt16BE = BP.writeUInt16BE
-  arr.writeUInt32LE = BP.writeUInt32LE
-  arr.writeUInt32BE = BP.writeUInt32BE
-  arr.writeIntLE = BP.writeIntLE
-  arr.writeIntBE = BP.writeIntBE
-  arr.writeInt8 = BP.writeInt8
-  arr.writeInt16LE = BP.writeInt16LE
-  arr.writeInt16BE = BP.writeInt16BE
-  arr.writeInt32LE = BP.writeInt32LE
-  arr.writeInt32BE = BP.writeInt32BE
-  arr.writeFloatLE = BP.writeFloatLE
-  arr.writeFloatBE = BP.writeFloatBE
-  arr.writeDoubleLE = BP.writeDoubleLE
-  arr.writeDoubleBE = BP.writeDoubleBE
-  arr.fill = BP.fill
-  arr.inspect = BP.inspect
-  arr.toArrayBuffer = BP.toArrayBuffer
-=======
-    res.push(codePoint)
-    i += bytesPerSequence
-=======
     openRequest.onsuccess = function onsuccess(event) {
       that.db = event.target.result;
       callback();
@@ -3790,7 +2916,6 @@ Buffer._augment = function _augment (arr) {
     };
   } catch (err) {
     callback(err);
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   }
 };
 
@@ -3801,16 +2926,8 @@ IndexedDB.prototype.getReadWriteContext = function () {
   return new IndexedDBContext(this.db, IDB_RW);
 };
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
-=======
-<<<<<<< HEAD
-var INVALID_BASE64_RE = /[^+\/0-9A-z\-]/g
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-=======
 module.exports = IndexedDB;
-},{"../constants.js":16,"../errors.js":5,"../buffer.js":3}],69:[function(require,module,exports) {
+},{"../constants.js":"iJA9","../errors.js":"p8GN","../buffer.js":"xfwq"}],"vLJO":[function(require,module,exports) {
 /*
  * base64-arraybuffer
  * https://github.com/niklasvh/base64-arraybuffer
@@ -3820,7 +2937,6 @@ module.exports = IndexedDB;
  */
 (function () {
   "use strict";
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
   var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
@@ -3843,82 +2959,6 @@ module.exports = IndexedDB;
       base64 += chars[bytes[i + 2] & 63];
     }
 
-<<<<<<< HEAD
-function utf8ToBytes (string, units) {
-  units = units || Infinity
-  var codePoint
-  var length = string.length
-  var leadSurrogate = null
-  var bytes = []
-
-  for (var i = 0; i < length; i++) {
-    codePoint = string.charCodeAt(i)
-
-    // is surrogate component
-    if (codePoint > 0xD7FF && codePoint < 0xE000) {
-      // last char was a lead
-      if (!leadSurrogate) {
-        // no lead yet
-        if (codePoint > 0xDBFF) {
-          // unexpected trail
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        } else if (i + 1 === length) {
-          // unpaired lead
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        }
-
-        // valid lead
-        leadSurrogate = codePoint
-
-        continue
-      }
-
-      // 2 leads in a row
-      if (codePoint < 0xDC00) {
-        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-        leadSurrogate = codePoint
-        continue
-      }
-
-      // valid surrogate pair
-      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
-    } else if (leadSurrogate) {
-      // valid bmp char, but last char was a lead
-      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-    }
-
-    leadSurrogate = null
-
-    // encode utf8
-    if (codePoint < 0x80) {
-      if ((units -= 1) < 0) break
-      bytes.push(codePoint)
-    } else if (codePoint < 0x800) {
-      if ((units -= 2) < 0) break
-      bytes.push(
-        codePoint >> 0x6 | 0xC0,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x10000) {
-      if ((units -= 3) < 0) break
-      bytes.push(
-        codePoint >> 0xC | 0xE0,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x110000) {
-      if ((units -= 4) < 0) break
-      bytes.push(
-        codePoint >> 0x12 | 0xF0,
-        codePoint >> 0xC & 0x3F | 0x80,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else {
-      throw new Error('Invalid code point')
-=======
     if (len % 3 === 2) {
       base64 = base64.substring(0, base64.length - 1) + "=";
     } else if (len % 3 === 1) {
@@ -3957,13 +2997,12 @@ function utf8ToBytes (string, units) {
       bytes[p++] = encoded1 << 2 | encoded2 >> 4;
       bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;
       bytes[p++] = (encoded3 & 3) << 6 | encoded4 & 63;
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
     }
 
     return arraybuffer;
   };
 })();
-},{}],54:[function(require,module,exports) {
+},{}],"hW+K":[function(require,module,exports) {
 var global = arguments[3];
 var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
 var FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;
@@ -4020,91 +3059,6 @@ WebSQLContext.prototype.getObject = function (key, callback) {
       return callback(err);
     }
 
-<<<<<<< HEAD
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"base64-js":6,"ieee754":9,"isarray":8}],8:[function(require,module,exports){
-var toString = {}.toString;
-
-module.exports = Array.isArray || function (arr) {
-  return toString.call(arr) == '[object Array]';
-};
-
-},{}],9:[function(require,module,exports){
-exports.read = function (buffer, offset, isLE, mLen, nBytes) {
-  var e, m
-  var eLen = (nBytes * 8) - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var nBits = -7
-  var i = isLE ? (nBytes - 1) : 0
-  var d = isLE ? -1 : 1
-  var s = buffer[offset + i]
-
-  i += d
-
-  e = s & ((1 << (-nBits)) - 1)
-  s >>= (-nBits)
-  nBits += eLen
-  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
-
-  m = e & ((1 << (-nBits)) - 1)
-  e >>= (-nBits)
-  nBits += mLen
-  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
-
-  if (e === 0) {
-    e = 1 - eBias
-  } else if (e === eMax) {
-    return m ? NaN : ((s ? -1 : 1) * Infinity)
-  } else {
-    m = m + Math.pow(2, mLen)
-    e = e - eBias
-  }
-  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-}
-
-exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
-  var e, m, c
-  var eLen = (nBytes * 8) - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
-  var i = isLE ? 0 : (nBytes - 1)
-  var d = isLE ? 1 : -1
-  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
-
-  value = Math.abs(value)
-
-  if (isNaN(value) || value === Infinity) {
-    m = isNaN(value) ? 1 : 0
-    e = eMax
-  } else {
-    e = Math.floor(Math.log(value) / Math.LN2)
-    if (value * (c = Math.pow(2, -e)) < 1) {
-      e--
-      c *= 2
-    }
-    if (e + eBias >= 1) {
-      value += rt / c
-    } else {
-      value += rt * Math.pow(2, 1 - eBias)
-    }
-    if (value * c >= 2) {
-      e++
-      c /= 2
-    }
-
-    if (e + eBias >= eMax) {
-      m = 0
-      e = eMax
-    } else if (e + eBias >= 1) {
-      m = ((value * c) - 1) * Math.pow(2, mLen)
-      e = e + eBias
-    } else {
-      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
-      e = 0
-    }
-=======
     try {
       if (result) {
         result = JSON.parse(result);
@@ -4155,7 +3109,6 @@ WebSQLContext.prototype.putBuffer = function (key, uint8BackedBuffer, callback)
 WebSQLContext.prototype.delete = function (key, callback) {
   function onSuccess(transaction, result) {
     callback(null);
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   }
   function onError(transaction, error) {
     callback(error);
@@ -4173,262 +3126,6 @@ WebSQL.isSupported = function () {
   return !!global.openDatabase;
 };
 
-<<<<<<< HEAD
-},{}],10:[function(require,module,exports){
-;(function () { // closure for web browsers
-
-if (typeof module === 'object' && module.exports) {
-  module.exports = LRUCache
-} else {
-  // just set the global for non-node platforms.
-  this.LRUCache = LRUCache
-}
-
-function hOP (obj, key) {
-  return Object.prototype.hasOwnProperty.call(obj, key)
-}
-
-function naiveLength () { return 1 }
-
-function LRUCache (options) {
-  if (!(this instanceof LRUCache))
-    return new LRUCache(options)
-
-  if (typeof options === 'number')
-    options = { max: options }
-
-  if (!options)
-    options = {}
-
-  this._max = options.max
-  // Kind of weird to have a default max of Infinity, but oh well.
-  if (!this._max || !(typeof this._max === "number") || this._max <= 0 )
-    this._max = Infinity
-
-  this._lengthCalculator = options.length || naiveLength
-  if (typeof this._lengthCalculator !== "function")
-    this._lengthCalculator = naiveLength
-
-  this._allowStale = options.stale || false
-  this._maxAge = options.maxAge || null
-  this._dispose = options.dispose
-  this.reset()
-}
-
-// resize the cache when the max changes.
-Object.defineProperty(LRUCache.prototype, "max",
-  { set : function (mL) {
-      if (!mL || !(typeof mL === "number") || mL <= 0 ) mL = Infinity
-      this._max = mL
-      if (this._length > this._max) trim(this)
-    }
-  , get : function () { return this._max }
-  , enumerable : true
-  })
-
-// resize the cache when the lengthCalculator changes.
-Object.defineProperty(LRUCache.prototype, "lengthCalculator",
-  { set : function (lC) {
-      if (typeof lC !== "function") {
-        this._lengthCalculator = naiveLength
-        this._length = this._itemCount
-        for (var key in this._cache) {
-          this._cache[key].length = 1
-        }
-      } else {
-        this._lengthCalculator = lC
-        this._length = 0
-        for (var key in this._cache) {
-          this._cache[key].length = this._lengthCalculator(this._cache[key].value)
-          this._length += this._cache[key].length
-        }
-      }
-
-      if (this._length > this._max) trim(this)
-    }
-  , get : function () { return this._lengthCalculator }
-  , enumerable : true
-  })
-
-Object.defineProperty(LRUCache.prototype, "length",
-  { get : function () { return this._length }
-  , enumerable : true
-  })
-
-
-Object.defineProperty(LRUCache.prototype, "itemCount",
-  { get : function () { return this._itemCount }
-  , enumerable : true
-  })
-
-LRUCache.prototype.forEach = function (fn, thisp) {
-  thisp = thisp || this
-  var i = 0;
-  for (var k = this._mru - 1; k >= 0 && i < this._itemCount; k--) if (this._lruList[k]) {
-    i++
-    var hit = this._lruList[k]
-    if (this._maxAge && (Date.now() - hit.now > this._maxAge)) {
-      del(this, hit)
-      if (!this._allowStale) hit = undefined
-    }
-    if (hit) {
-      fn.call(thisp, hit.value, hit.key, this)
-    }
-  }
-}
-
-LRUCache.prototype.keys = function () {
-  var keys = new Array(this._itemCount)
-  var i = 0
-  for (var k = this._mru - 1; k >= 0 && i < this._itemCount; k--) if (this._lruList[k]) {
-    var hit = this._lruList[k]
-    keys[i++] = hit.key
-  }
-  return keys
-}
-
-LRUCache.prototype.values = function () {
-  var values = new Array(this._itemCount)
-  var i = 0
-  for (var k = this._mru - 1; k >= 0 && i < this._itemCount; k--) if (this._lruList[k]) {
-    var hit = this._lruList[k]
-    values[i++] = hit.value
-  }
-  return values
-}
-
-LRUCache.prototype.reset = function () {
-  if (this._dispose && this._cache) {
-    for (var k in this._cache) {
-      this._dispose(k, this._cache[k].value)
-    }
-  }
-
-  this._cache = Object.create(null) // hash of items by key
-  this._lruList = Object.create(null) // list of items in order of use recency
-  this._mru = 0 // most recently used
-  this._lru = 0 // least recently used
-  this._length = 0 // number of items in the list
-  this._itemCount = 0
-}
-
-// Provided for debugging/dev purposes only. No promises whatsoever that
-// this API stays stable.
-LRUCache.prototype.dump = function () {
-  return this._cache
-}
-
-LRUCache.prototype.dumpLru = function () {
-  return this._lruList
-}
-
-LRUCache.prototype.set = function (key, value) {
-  if (hOP(this._cache, key)) {
-    // dispose of the old one before overwriting
-    if (this._dispose) this._dispose(key, this._cache[key].value)
-    if (this._maxAge) this._cache[key].now = Date.now()
-    this._cache[key].value = value
-    this.get(key)
-    return true
-  }
-
-  var len = this._lengthCalculator(value)
-  var age = this._maxAge ? Date.now() : 0
-  var hit = new Entry(key, value, this._mru++, len, age)
-
-  // oversized objects fall out of cache automatically.
-  if (hit.length > this._max) {
-    if (this._dispose) this._dispose(key, value)
-    return false
-  }
-
-  this._length += hit.length
-  this._lruList[hit.lu] = this._cache[key] = hit
-  this._itemCount ++
-
-  if (this._length > this._max) trim(this)
-  return true
-}
-
-LRUCache.prototype.has = function (key) {
-  if (!hOP(this._cache, key)) return false
-  var hit = this._cache[key]
-  if (this._maxAge && (Date.now() - hit.now > this._maxAge)) {
-    return false
-  }
-  return true
-}
-
-LRUCache.prototype.get = function (key) {
-  return get(this, key, true)
-}
-
-LRUCache.prototype.peek = function (key) {
-  return get(this, key, false)
-}
-
-LRUCache.prototype.pop = function () {
-  var hit = this._lruList[this._lru]
-  del(this, hit)
-  return hit || null
-}
-
-LRUCache.prototype.del = function (key) {
-  del(this, this._cache[key])
-}
-
-function get (self, key, doUse) {
-  var hit = self._cache[key]
-  if (hit) {
-    if (self._maxAge && (Date.now() - hit.now > self._maxAge)) {
-      del(self, hit)
-      if (!self._allowStale) hit = undefined
-    } else {
-      if (doUse) use(self, hit)
-    }
-    if (hit) hit = hit.value
-  }
-  return hit
-}
-
-function use (self, hit) {
-  shiftLU(self, hit)
-  hit.lu = self._mru ++
-  if (self._maxAge) hit.now = Date.now()
-  self._lruList[hit.lu] = hit
-}
-
-function trim (self) {
-  while (self._lru < self._mru && self._length > self._max)
-    del(self, self._lruList[self._lru])
-}
-
-function shiftLU (self, hit) {
-  delete self._lruList[ hit.lu ]
-  while (self._lru < self._mru && !self._lruList[self._lru]) self._lru ++
-}
-
-function del (self, hit) {
-  if (hit) {
-    if (self._dispose) self._dispose(hit.key, hit.value)
-    self._length -= hit.length
-    self._itemCount --
-    delete self._cache[ hit.key ]
-    shiftLU(self, hit)
-  }
-}
-
-// classy, since V8 prefers predictable objects.
-function Entry (key, value, lu, length, now) {
-  this.key = key
-  this.value = value
-  this.lu = lu
-  this.length = length
-  this.now = now
-}
-
-})()
-=======
 WebSQL.prototype.open = function (callback) {
   var that = this;
 
@@ -4470,7 +3167,7 @@ WebSQL.prototype.getReadWriteContext = function () {
 };
 
 module.exports = WebSQL;
-},{"../constants.js":16,"../errors.js":5,"../buffer.js":3,"base64-arraybuffer":69}],42:[function(require,module,exports) {
+},{"../constants.js":"iJA9","../errors.js":"p8GN","../buffer.js":"xfwq","base64-arraybuffer":"vLJO"}],"pBGv":[function(require,module,exports) {
 
 // shim for using process in browser
 var process = module.exports = {};
@@ -4657,7 +3354,7 @@ process.chdir = function (dir) {
 process.umask = function () {
     return 0;
 };
-},{}],19:[function(require,module,exports) {
+},{}],"u4Zs":[function(require,module,exports) {
 var process = require("process");
 var define;
 /*global setImmediate: false, setTimeout: false, console: false */
@@ -4739,7 +3436,7 @@ var define;
                 root.async = async;
             }
 })();
-},{"process":42}],55:[function(require,module,exports) {
+},{"process":"pBGv"}],"3OWy":[function(require,module,exports) {
 var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
 // NOTE: prefer setImmediate to nextTick for proper recursion yielding.
 // see https://github.com/js-platform/filer/pull/24
@@ -4825,7 +3522,7 @@ Memory.prototype.getReadWriteContext = function () {
 };
 
 module.exports = Memory;
-},{"../constants.js":16,"../../lib/async.js":19}],21:[function(require,module,exports) {
+},{"../constants.js":"iJA9","../../lib/async.js":"u4Zs"}],"AiW7":[function(require,module,exports) {
 var IndexedDB = require('./indexeddb.js');
 var WebSQL = require('./websql.js');
 var Memory = require('./memory.js');
@@ -4834,7 +3531,6 @@ module.exports = {
   IndexedDB: IndexedDB,
   WebSQL: WebSQL,
   Memory: Memory,
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
   /**
    * Convenience Provider references
@@ -4862,7 +3558,7 @@ module.exports = {
     return NotSupported;
   }()
 };
-},{"./indexeddb.js":53,"./websql.js":54,"./memory.js":55}],23:[function(require,module,exports) {
+},{"./indexeddb.js":"QO4x","./websql.js":"hW+K","./memory.js":"3OWy"}],"QMiB":[function(require,module,exports) {
 var defaults = require('../constants.js').ENVIRONMENT;
 
 module.exports = function Environment(env) {
@@ -4878,7 +3574,7 @@ module.exports = function Environment(env) {
     env[name] = value;
   };
 };
-},{"../constants.js":16}],20:[function(require,module,exports) {
+},{"../constants.js":"iJA9"}],"03yF":[function(require,module,exports) {
 var Buffer = require("buffer").Buffer;
 // Adapt encodings to work with Buffer or Uint8Array, they expect the latter
 function decode(buf) {
@@ -4893,7 +3589,7 @@ module.exports = {
   encode: encode,
   decode: decode
 };
-},{"buffer":13}],45:[function(require,module,exports) {
+},{"buffer":"dskh"}],"UUq2":[function(require,module,exports) {
 var process = require("process");
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -5120,7 +3816,7 @@ var substr = 'ab'.substr(-1) === 'b'
     }
 ;
 
-},{"process":42}],68:[function(require,module,exports) {
+},{"process":"pBGv"}],"bQx9":[function(require,module,exports) {
 module.exports = function (xs, fn) {
     var res = [];
     for (var i = 0; i < xs.length; i++) {
@@ -5135,7 +3831,7 @@ var isArray = Array.isArray || function (xs) {
     return Object.prototype.toString.call(xs) === '[object Array]';
 };
 
-},{}],67:[function(require,module,exports) {
+},{}],"6D9y":[function(require,module,exports) {
 'use strict';
 module.exports = balanced;
 function balanced(a, b, str) {
@@ -5196,7 +3892,7 @@ function range(a, b, str) {
   return result;
 }
 
-},{}],46:[function(require,module,exports) {
+},{}],"dwX/":[function(require,module,exports) {
 var concatMap = require('concat-map');
 var balanced = require('balanced-match');
 
@@ -5399,7 +4095,7 @@ function expand(str, isTop) {
 }
 
 
-},{"concat-map":68,"balanced-match":67}],25:[function(require,module,exports) {
+},{"concat-map":"bQx9","balanced-match":"6D9y"}],"Nt/K":[function(require,module,exports) {
 module.exports = minimatch
 minimatch.Minimatch = Minimatch
 
@@ -5762,233 +4458,6 @@ function parse (pattern, isSub) {
           continue
         }
 
-<<<<<<< HEAD
-},{"lru-cache":10,"path":12,"sigmund":13}],12:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-// resolves . and .. elements in a path array with directory names there
-// must be no slashes, empty elements, or device names (c:\) in the array
-// (so also no leading and trailing slashes - it does not distinguish
-// relative and absolute paths)
-function normalizeArray(parts, allowAboveRoot) {
-  // if the path tries to go above the root, `up` ends up > 0
-  var up = 0;
-  for (var i = parts.length - 1; i >= 0; i--) {
-    var last = parts[i];
-    if (last === '.') {
-      parts.splice(i, 1);
-    } else if (last === '..') {
-      parts.splice(i, 1);
-      up++;
-    } else if (up) {
-      parts.splice(i, 1);
-      up--;
-    }
-  }
-
-  // if the path is allowed to go above the root, restore leading ..s
-  if (allowAboveRoot) {
-    for (; up--; up) {
-      parts.unshift('..');
-    }
-  }
-
-  return parts;
-}
-
-// Split a filename into [root, dir, basename, ext], unix version
-// 'root' is just a slash, or nothing.
-var splitPathRe =
-    /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
-var splitPath = function(filename) {
-  return splitPathRe.exec(filename).slice(1);
-};
-
-// path.resolve([from ...], to)
-// posix version
-exports.resolve = function() {
-  var resolvedPath = '',
-      resolvedAbsolute = false;
-
-  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
-    var path = (i >= 0) ? arguments[i] : process.cwd();
-
-    // Skip empty and invalid entries
-    if (typeof path !== 'string') {
-      throw new TypeError('Arguments to path.resolve must be strings');
-    } else if (!path) {
-      continue;
-    }
-
-    resolvedPath = path + '/' + resolvedPath;
-    resolvedAbsolute = path.charAt(0) === '/';
-  }
-
-  // At this point the path should be resolved to a full absolute path, but
-  // handle relative paths to be safe (might happen when process.cwd() fails)
-
-  // Normalize the path
-  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
-    return !!p;
-  }), !resolvedAbsolute).join('/');
-
-  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
-};
-
-// path.normalize(path)
-// posix version
-exports.normalize = function(path) {
-  var isAbsolute = exports.isAbsolute(path),
-      trailingSlash = substr(path, -1) === '/';
-
-  // Normalize the path
-  path = normalizeArray(filter(path.split('/'), function(p) {
-    return !!p;
-  }), !isAbsolute).join('/');
-
-  if (!path && !isAbsolute) {
-    path = '.';
-  }
-  if (path && trailingSlash) {
-    path += '/';
-  }
-
-  return (isAbsolute ? '/' : '') + path;
-};
-
-// posix version
-exports.isAbsolute = function(path) {
-  return path.charAt(0) === '/';
-};
-
-// posix version
-exports.join = function() {
-  var paths = Array.prototype.slice.call(arguments, 0);
-  return exports.normalize(filter(paths, function(p, index) {
-    if (typeof p !== 'string') {
-      throw new TypeError('Arguments to path.join must be strings');
-    }
-    return p;
-  }).join('/'));
-};
-
-
-// path.relative(from, to)
-// posix version
-exports.relative = function(from, to) {
-  from = exports.resolve(from).substr(1);
-  to = exports.resolve(to).substr(1);
-
-  function trim(arr) {
-    var start = 0;
-    for (; start < arr.length; start++) {
-      if (arr[start] !== '') break;
-    }
-
-    var end = arr.length - 1;
-    for (; end >= 0; end--) {
-      if (arr[end] !== '') break;
-    }
-
-    if (start > end) return [];
-    return arr.slice(start, end - start + 1);
-  }
-
-  var fromParts = trim(from.split('/'));
-  var toParts = trim(to.split('/'));
-
-  var length = Math.min(fromParts.length, toParts.length);
-  var samePartsLength = length;
-  for (var i = 0; i < length; i++) {
-    if (fromParts[i] !== toParts[i]) {
-      samePartsLength = i;
-      break;
-    }
-  }
-
-  var outputParts = [];
-  for (var i = samePartsLength; i < fromParts.length; i++) {
-    outputParts.push('..');
-  }
-
-  outputParts = outputParts.concat(toParts.slice(samePartsLength));
-
-  return outputParts.join('/');
-};
-
-exports.sep = '/';
-exports.delimiter = ':';
-
-exports.dirname = function(path) {
-  var result = splitPath(path),
-      root = result[0],
-      dir = result[1];
-
-  if (!root && !dir) {
-    // No dirname whatsoever
-    return '.';
-  }
-
-  if (dir) {
-    // It has a dirname, strip trailing slash
-    dir = dir.substr(0, dir.length - 1);
-  }
-
-  return root + dir;
-};
-
-
-exports.basename = function(path, ext) {
-  var f = splitPath(path)[2];
-  // TODO: make this comparison case-insensitive on windows?
-  if (ext && f.substr(-1 * ext.length) === ext) {
-    f = f.substr(0, f.length - ext.length);
-  }
-  return f;
-};
-
-
-exports.extname = function(path) {
-  return splitPath(path)[3];
-};
-
-function filter (xs, f) {
-    if (xs.filter) return xs.filter(f);
-    var res = [];
-    for (var i = 0; i < xs.length; i++) {
-        if (f(xs[i], i, xs)) res.push(xs[i]);
-    }
-    return res;
-}
-
-// String.prototype.substr - negative index don't work in IE8
-var substr = 'ab'.substr(-1) === 'b'
-    ? function (str, start, len) { return str.substr(start, len) }
-    : function (str, start, len) {
-        if (start < 0) start = str.length + start;
-        return str.substr(start, len);
-    }
-;
-=======
         // if we already have a stateChar, then it means
         // that there was something like ** or +? in there.
         // Handle the stateChar, then proceed with this one.
@@ -6266,7 +4735,6 @@ var substr = 'ab'.substr(-1) === 'b'
 minimatch.makeRe = function (pattern, options) {
   return new Minimatch(pattern, options || {}).makeRe()
 }
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
 Minimatch.prototype.makeRe = makeRe
 function makeRe () {
@@ -6326,23 +4794,6 @@ minimatch.match = function (list, pattern, options) {
   return list
 }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-}).call(this,require("buffer").Buffer)
-},{"buffer":7}],15:[function(require,module,exports){
-var O_READ = 'READ';
-var O_WRITE = 'WRITE';
-var O_CREATE = 'CREATE';
-var O_EXCLUSIVE = 'EXCLUSIVE';
-var O_TRUNCATE = 'TRUNCATE';
-var O_APPEND = 'APPEND';
-var XATTR_CREATE = 'CREATE';
-var XATTR_REPLACE = 'REPLACE';
-=======
-function hexSlice (buf, start, end) {
-  var len = buf.length
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-=======
 Minimatch.prototype.match = match
 function match (f, partial) {
   this.debug('match', f, this.pattern)
@@ -6350,7 +4801,6 @@ function match (f, partial) {
   // comments, etc.
   if (this.comment) return false
   if (this.empty) return f === ''
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
   if (f === '/' && partial) return true
 
@@ -6361,41 +4811,6 @@ function match (f, partial) {
     f = f.split(path.sep).join('/')
   }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  WSQL_VERSION: "1",
-  WSQL_SIZE: 5 * 1024 * 1024,
-  WSQL_DESC: "FileSystem Storage",
-
-  NODE_TYPE_FILE: 'FILE',
-  NODE_TYPE_DIRECTORY: 'DIRECTORY',
-  NODE_TYPE_SYMBOLIC_LINK: 'SYMLINK',
-  NODE_TYPE_META: 'META',
-
-  S_IFREG: 0x8000,
-  S_IFDIR: 0x4000,
-  S_IFLNK: 0xA000,
-
-  DEFAULT_DIR_PERMISSIONS: 0x1ED, // 755
-  DEFAULT_FILE_PERMISSIONS: 0x1A4, // 644
-  FULL_READ_WRITE_EXEC_PERMISSIONS: 0x1FF, // 777
-  READ_WRITE_PERMISSIONS: 0x1B6, /// 666
-  
-  SYMLOOP_MAX: 10,
-=======
-Buffer.prototype.slice = function slice (start, end) {
-  var len = this.length
-  start = ~~start
-  end = end === undefined ? len : ~~end
-
-  if (start < 0) {
-    start += len
-    if (start < 0) start = 0
-  } else if (start > len) {
-    start = len
-  }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-=======
   // treat the test path as a set of pathparts.
   f = f.split(slashSplit)
   this.debug(this.pattern, 'split', f)
@@ -6404,7 +4819,6 @@ Buffer.prototype.slice = function slice (start, end) {
   // in order for it to be valid.  If negating, then just one
   // match means that we have failed.
   // Either way, return on the first hit.
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
   var set = this.set
   this.debug(this.pattern, 'set', set)
@@ -6459,1710 +4873,11 @@ Minimatch.prototype.matchOne = function (file, pattern, partial) {
     var p = pattern[pi]
     var f = file[fi]
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  ENVIRONMENT: {
-    TMP: '/tmp',
-    PATH: ''
-  },
-
-  // Duplicate Node's fs.constants
-  fsConstants: {
-    O_RDONLY: 0,
-    O_WRONLY: 1,
-    O_RDWR: 2,
-    S_IFMT: 61440,
-    S_IFREG: 32768,
-    S_IFDIR: 16384,
-    S_IFCHR: 8192,
-    S_IFBLK: 24576,
-    S_IFIFO: 4096,
-    S_IFLNK: 40960,
-    S_IFSOCK: 49152,
-    O_CREAT: 512,
-    O_EXCL: 2048,
-    O_NOCTTY: 131072,
-    O_TRUNC: 1024,
-    O_APPEND: 8,
-    O_DIRECTORY: 1048576,
-    O_NOFOLLOW: 256,
-    O_SYNC: 128,
-    O_DSYNC: 4194304,
-    O_SYMLINK: 2097152,
-    O_NONBLOCK: 4,
-    S_IRWXU: 448,
-    S_IRUSR: 256,
-    S_IWUSR: 128,
-    S_IXUSR: 64,
-    S_IRWXG: 56,
-    S_IRGRP: 32,
-    S_IWGRP: 16,
-    S_IXGRP: 8,
-    S_IRWXO: 7,
-    S_IROTH: 4,
-    S_IWOTH: 2,
-    S_IXOTH: 1,
-    F_OK: 0,
-    R_OK: 4,
-    W_OK: 2,
-    X_OK: 1,
-    UV_FS_COPYFILE_EXCL: 1,
-    COPYFILE_EXCL: 1
-=======
-  var val = this[offset + --byteLength]
-  var mul = 1
-  while (byteLength > 0 && (mul *= 0x100)) {
-    val += this[offset + --byteLength] * mul
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  }
-
-<<<<<<< HEAD
-},{}],16:[function(require,module,exports){
-var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;
-
-module.exports = function DirectoryEntry(id, type) {
-  this.id = id;
-  this.type = type || NODE_TYPE_FILE;
-};
-=======
-  return val
-}
-
-Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 1, this.length)
-  return this[offset]
-}
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  return this[offset] | (this[offset + 1] << 8)
-}
-
-Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  return (this[offset] << 8) | this[offset + 1]
-}
-
-Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-
-<<<<<<< HEAD
-}).call(this,require("buffer").Buffer)
-},{"buffer":7}],18:[function(require,module,exports){
-var errors = {};
-[
-  /**
-   * node.js errors - we only use some of these, add as needed.
-   */
-  //'-1:UNKNOWN:unknown error',
-  //'0:OK:success',
-  //'1:EOF:end of file',
-  //'2:EADDRINFO:getaddrinfo error',
-  //'3:EACCES:permission denied',
-  //'4:EAGAIN:resource temporarily unavailable',
-  //'5:EADDRINUSE:address already in use',
-  //'6:EADDRNOTAVAIL:address not available',
-  //'7:EAFNOSUPPORT:address family not supported',
-  //'8:EALREADY:connection already in progress',
-  '9:EBADF:bad file descriptor',
-  '10:EBUSY:resource busy or locked',
-  //'11:ECONNABORTED:software caused connection abort',
-  //'12:ECONNREFUSED:connection refused',
-  //'13:ECONNRESET:connection reset by peer',
-  //'14:EDESTADDRREQ:destination address required',
-  //'15:EFAULT:bad address in system call argument',
-  //'16:EHOSTUNREACH:host is unreachable',
-  //'17:EINTR:interrupted system call',
-  '18:EINVAL:invalid argument',
-  //'19:EISCONN:socket is already connected',
-  //'20:EMFILE:too many open files',
-  //'21:EMSGSIZE:message too long',
-  //'22:ENETDOWN:network is down',
-  //'23:ENETUNREACH:network is unreachable',
-  //'24:ENFILE:file table overflow',
-  //'25:ENOBUFS:no buffer space available',
-  //'26:ENOMEM:not enough memory',
-  '27:ENOTDIR:not a directory',
-  '28:EISDIR:illegal operation on a directory',
-  //'29:ENONET:machine is not on the network',
-  // errno 30 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js
-  //'31:ENOTCONN:socket is not connected',
-  //'32:ENOTSOCK:socket operation on non-socket',
-  //'33:ENOTSUP:operation not supported on socket',
-  '34:ENOENT:no such file or directory',
-  //'35:ENOSYS:function not implemented',
-  //'36:EPIPE:broken pipe',
-  //'37:EPROTO:protocol error',
-  //'38:EPROTONOSUPPORT:protocol not supported',
-  //'39:EPROTOTYPE:protocol wrong type for socket',
-  //'40:ETIMEDOUT:connection timed out',
-  //'41:ECHARSET:invalid Unicode character',
-  //'42:EAIFAMNOSUPPORT:address family for hostname not supported',
-  // errno 43 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js
-  //'44:EAISERVICE:servname not supported for ai_socktype',
-  //'45:EAISOCKTYPE:ai_socktype not supported',
-  //'46:ESHUTDOWN:cannot send after transport endpoint shutdown',
-  '47:EEXIST:file already exists',
-  //'48:ESRCH:no such process',
-  //'49:ENAMETOOLONG:name too long',
-  '50:EPERM:operation not permitted',
-  '51:ELOOP:too many symbolic links encountered',
-  //'52:EXDEV:cross-device link not permitted',
-  '53:ENOTEMPTY:directory not empty',
-  //'54:ENOSPC:no space left on device',
-  '55:EIO:i/o error',
-  //'56:EROFS:read-only file system',
-  //'57:ENODEV:no such device',
-  //'58:ESPIPE:invalid seek',
-  //'59:ECANCELED:operation canceled',
-=======
-  return ((this[offset]) |
-      (this[offset + 1] << 8) |
-      (this[offset + 2] << 16)) +
-      (this[offset + 3] * 0x1000000)
-}
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-
-  return (this[offset] * 0x1000000) +
-    ((this[offset + 1] << 16) |
-    (this[offset + 2] << 8) |
-    this[offset + 3])
-}
-
-Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
-
-  var val = this[offset]
-  var mul = 1
-  var i = 0
-  while (++i < byteLength && (mul *= 0x100)) {
-    val += this[offset + i] * mul
-  }
-  mul *= 0x80
-
-  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
-
-  return val
-}
-
-<<<<<<< HEAD
-var Path = require('../path.js');
-var normalize = Path.normalize;
-var dirname = Path.dirname;
-var basename = Path.basename;
-var isAbsolutePath = Path.isAbsolute;
-var isNullPath = Path.isNull;
-
-var Constants = require('../constants.js');
-var NODE_TYPE_FILE = Constants.NODE_TYPE_FILE;
-var NODE_TYPE_DIRECTORY = Constants.NODE_TYPE_DIRECTORY;
-var NODE_TYPE_SYMBOLIC_LINK = Constants.NODE_TYPE_SYMBOLIC_LINK;
-var NODE_TYPE_META = Constants.NODE_TYPE_META;
-
-var DEFAULT_FILE_PERMISSIONS = Constants.DEFAULT_FILE_PERMISSIONS;
-var DEFAULT_DIR_PERMISSIONS = Constants.DEFAULT_DIR_PERMISSIONS;
-var FULL_READ_WRITE_EXEC_PERMISSIONS = Constants.FULL_READ_WRITE_EXEC_PERMISSIONS;
-=======
-Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-  var i = byteLength
-  var mul = 1
-  var val = this[offset + --i]
-  while (i > 0 && (mul *= 0x100)) {
-    val += this[offset + --i] * mul
-  }
-  mul *= 0x80
-
-  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
-
-  return val
-}
-
-Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 1, this.length)
-  if (!(this[offset] & 0x80)) return (this[offset])
-  return ((0xff - this[offset] + 1) * -1)
-}
-
-Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  var val = this[offset] | (this[offset + 1] << 8)
-  return (val & 0x8000) ? val | 0xFFFF0000 : val
-}
-
-<<<<<<< HEAD
-}).call(this,require("buffer").Buffer)
-},{"buffer":6}],15:[function(require,module,exports){
-var O_READ = 'READ';
-var O_WRITE = 'WRITE';
-var O_CREATE = 'CREATE';
-var O_EXCLUSIVE = 'EXCLUSIVE';
-var O_TRUNCATE = 'TRUNCATE';
-var O_APPEND = 'APPEND';
-var XATTR_CREATE = 'CREATE';
-var XATTR_REPLACE = 'REPLACE';
-=======
-Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  var val = this[offset + 1] | (this[offset] << 8)
-  return (val & 0x8000) ? val | 0xFFFF0000 : val
-}
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-<<<<<<< HEAD
-  function complete(error) {
-    context.changes.push({ event: 'change', path: path });
-    callback(error);
-  }
-=======
-Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-  return (this[offset]) |
-    (this[offset + 1] << 8) |
-    (this[offset + 2] << 16) |
-    (this[offset + 3] << 24)
-}
-
-<<<<<<< HEAD
-/**
- * make_node()
- */
-// in: file or directory path
-// out: new node representing file/directory
-function make_node(context, path, type, callback) {
-  if(type !== NODE_TYPE_DIRECTORY && type !== NODE_TYPE_FILE) {
-    return callback(new Errors.EINVAL('type must be a directory or file', path));
-  }
-=======
-Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-  return (this[offset] << 24) |
-    (this[offset + 1] << 16) |
-    (this[offset + 2] << 8) |
-    (this[offset + 3])
-}
-
-Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-  return ieee754.read(this, offset, true, 23, 4)
-}
-
-<<<<<<< HEAD
-  // Check if the parent node exists
-  function create_node_in_parent(error, parentDirectoryNode) {
-    if(error) {
-      callback(error);
-    } else if(parentDirectoryNode.type !== NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));
-    } else {
-      parentNode = parentDirectoryNode;
-      find_node(context, path, check_if_node_exists);
-    }
-  }
-=======
-Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-  return ieee754.read(this, offset, false, 23, 4)
-}
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 8, this.length)
-  return ieee754.read(this, offset, true, 52, 8)
-}
-
-<<<<<<< HEAD
-  // Create the new node
-  function create_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      parentNodeData = result;
-      Node.create({
-        guid: context.guid,
-        type: type
-      }, function(error, result) {
-        if(error) {
-          callback(error);
-          return;
-        }
-        node = result;
-        node.nlinks += 1;
-        context.putObject(node.id, node, update_parent_node_data);
-      });
-    }
-  }
-=======
-Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 8, this.length)
-  return ieee754.read(this, offset, false, 52, 8)
-}
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-function checkInt (buf, value, offset, ext, max, min) {
-  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
-  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
-  if (offset + ext > buf.length) throw new RangeError('Index out of range')
-}
-
-Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) {
-    var maxBytes = Math.pow(2, 8 * byteLength) - 1
-    checkInt(this, value, offset, byteLength, maxBytes, 0)
-  }
-
-<<<<<<< HEAD
-  // Update the parent nodes data
-  function update_parent_node_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      parentNodeData[name] = new DirectoryEntry(node.id, type);
-      context.putObject(parentNode.data, parentNodeData, update_time);
-    }
-=======
-  var mul = 1
-  var i = 0
-  this[offset] = value & 0xFF
-  while (++i < byteLength && (mul *= 0x100)) {
-    this[offset + i] = (value / mul) & 0xFF
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) {
-    var maxBytes = Math.pow(2, 8 * byteLength) - 1
-    checkInt(this, value, offset, byteLength, maxBytes, 0)
-  }
-
-<<<<<<< HEAD
-  function read_root_directory_node(error, superNode) {
-    if(error) {
-      callback(error);
-    } else if(!superNode || superNode.type !== NODE_TYPE_META || !superNode.rnode) {
-      callback(new Errors.EFILESYSTEMERROR());
-    } else {
-      context.getObject(superNode.rnode, check_root_directory_node);
-    }
-=======
-  var i = byteLength - 1
-  var mul = 1
-  this[offset + i] = value & 0xFF
-  while (--i >= 0 && (mul *= 0x100)) {
-    this[offset + i] = (value / mul) & 0xFF
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
-  this[offset] = (value & 0xff)
-  return offset + 1
-}
-
-function objectWriteUInt16 (buf, value, offset, littleEndian) {
-  if (value < 0) value = 0xffff + value + 1
-  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {
-    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
-      (littleEndian ? i : 1 - i) * 8
-  }
-}
-
-<<<<<<< HEAD
-},{}],16:[function(require,module,exports){
-var MODE_FILE = require('./constants.js').MODE_FILE;
-=======
-Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value & 0xff)
-    this[offset + 1] = (value >>> 8)
-  } else {
-    objectWriteUInt16(this, value, offset, true)
-  }
-  return offset + 2
-}
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 8)
-    this[offset + 1] = (value & 0xff)
-  } else {
-    objectWriteUInt16(this, value, offset, false)
-  }
-  return offset + 2
-}
-
-<<<<<<< HEAD
-},{"./constants.js":15}],17:[function(require,module,exports){
-(function (Buffer){
-// Adapt encodings to work with Buffer or Uint8Array, they expect the latter
-function decode(buf) {
-  return buf.toString('utf8');
-=======
-function objectWriteUInt32 (buf, value, offset, littleEndian) {
-  if (value < 0) value = 0xffffffff + value + 1
-  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {
-    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
-  }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-}
-
-Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset + 3] = (value >>> 24)
-    this[offset + 2] = (value >>> 16)
-    this[offset + 1] = (value >>> 8)
-    this[offset] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, true)
-  }
-  return offset + 4
-}
-
-Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 24)
-    this[offset + 1] = (value >>> 16)
-    this[offset + 2] = (value >>> 8)
-    this[offset + 3] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, false)
-  }
-  return offset + 4
-}
-
-<<<<<<< HEAD
-}).call(this,require("buffer").Buffer)
-},{"buffer":6}],18:[function(require,module,exports){
-var errors = {};
-[
-  /**
-   * node.js errors - we only use some of these, add as needed.
-   */
-  //'-1:UNKNOWN:unknown error',
-  //'0:OK:success',
-  //'1:EOF:end of file',
-  //'2:EADDRINFO:getaddrinfo error',
-  //'3:EACCES:permission denied',
-  //'4:EAGAIN:resource temporarily unavailable',
-  //'5:EADDRINUSE:address already in use',
-  //'6:EADDRNOTAVAIL:address not available',
-  //'7:EAFNOSUPPORT:address family not supported',
-  //'8:EALREADY:connection already in progress',
-  '9:EBADF:bad file descriptor',
-  '10:EBUSY:resource busy or locked',
-  //'11:ECONNABORTED:software caused connection abort',
-  //'12:ECONNREFUSED:connection refused',
-  //'13:ECONNRESET:connection reset by peer',
-  //'14:EDESTADDRREQ:destination address required',
-  //'15:EFAULT:bad address in system call argument',
-  //'16:EHOSTUNREACH:host is unreachable',
-  //'17:EINTR:interrupted system call',
-  '18:EINVAL:invalid argument',
-  //'19:EISCONN:socket is already connected',
-  //'20:EMFILE:too many open files',
-  //'21:EMSGSIZE:message too long',
-  //'22:ENETDOWN:network is down',
-  //'23:ENETUNREACH:network is unreachable',
-  //'24:ENFILE:file table overflow',
-  //'25:ENOBUFS:no buffer space available',
-  //'26:ENOMEM:not enough memory',
-  '27:ENOTDIR:not a directory',
-  '28:EISDIR:illegal operation on a directory',
-  //'29:ENONET:machine is not on the network',
-  // errno 30 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js
-  //'31:ENOTCONN:socket is not connected',
-  //'32:ENOTSOCK:socket operation on non-socket',
-  //'33:ENOTSUP:operation not supported on socket',
-  '34:ENOENT:no such file or directory',
-  //'35:ENOSYS:function not implemented',
-  //'36:EPIPE:broken pipe',
-  //'37:EPROTO:protocol error',
-  //'38:EPROTONOSUPPORT:protocol not supported',
-  //'39:EPROTOTYPE:protocol wrong type for socket',
-  //'40:ETIMEDOUT:connection timed out',
-  //'41:ECHARSET:invalid Unicode character',
-  //'42:EAIFAMNOSUPPORT:address family for hostname not supported',
-  // errno 43 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js
-  //'44:EAISERVICE:servname not supported for ai_socktype',
-  //'45:EAISOCKTYPE:ai_socktype not supported',
-  //'46:ESHUTDOWN:cannot send after transport endpoint shutdown',
-  '47:EEXIST:file already exists',
-  //'48:ESRCH:no such process',
-  //'49:ENAMETOOLONG:name too long',
-  '50:EPERM:operation not permitted',
-  '51:ELOOP:too many symbolic links encountered',
-  //'52:EXDEV:cross-device link not permitted',
-  '53:ENOTEMPTY:directory not empty',
-  //'54:ENOSPC:no space left on device',
-  '55:EIO:i/o error',
-  //'56:EROFS:read-only file system',
-  //'57:ENODEV:no such device',
-  //'58:ESPIPE:invalid seek',
-  //'59:ECANCELED:operation canceled',
-=======
-Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) {
-    var limit = Math.pow(2, 8 * byteLength - 1)
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-    checkInt(this, value, offset, byteLength, limit - 1, -limit)
-  }
-
-  var i = 0
-  var mul = 1
-  var sub = 0
-  this[offset] = value & 0xFF
-  while (++i < byteLength && (mul *= 0x100)) {
-    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
-      sub = 1
-    }
-    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) {
-    var limit = Math.pow(2, 8 * byteLength - 1)
-
-    checkInt(this, value, offset, byteLength, limit - 1, -limit)
-  }
-
-  var i = byteLength - 1
-  var mul = 1
-  var sub = 0
-  this[offset + i] = value & 0xFF
-  while (--i >= 0 && (mul *= 0x100)) {
-    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
-      sub = 1
-    }
-    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
-  }
-
-  return offset + byteLength
-}
-
-Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
-  if (value < 0) value = 0xff + value + 1
-  this[offset] = (value & 0xff)
-  return offset + 1
-}
-
-<<<<<<< HEAD
-},{}],19:[function(require,module,exports){
-var _ = require('../../lib/nodash.js');
-
-var Path = require('../path.js');
-var normalize = Path.normalize;
-var dirname = Path.dirname;
-var basename = Path.basename;
-var isAbsolutePath = Path.isAbsolute;
-var isNullPath = Path.isNull;
-
-var Constants = require('../constants.js');
-var MODE_FILE = Constants.MODE_FILE;
-var MODE_DIRECTORY = Constants.MODE_DIRECTORY;
-var MODE_SYMBOLIC_LINK = Constants.MODE_SYMBOLIC_LINK;
-var MODE_META = Constants.MODE_META;
-=======
-Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value & 0xff)
-    this[offset + 1] = (value >>> 8)
-  } else {
-    objectWriteUInt16(this, value, offset, true)
-  }
-  return offset + 2
-}
-
-Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 8)
-    this[offset + 1] = (value & 0xff)
-  } else {
-    objectWriteUInt16(this, value, offset, false)
-  }
-  return offset + 2
-}
-
-Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value & 0xff)
-    this[offset + 1] = (value >>> 8)
-    this[offset + 2] = (value >>> 16)
-    this[offset + 3] = (value >>> 24)
-  } else {
-    objectWriteUInt32(this, value, offset, true)
-  }
-  return offset + 4
-}
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
-  if (value < 0) value = 0xffffffff + value + 1
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 24)
-    this[offset + 1] = (value >>> 16)
-    this[offset + 2] = (value >>> 8)
-    this[offset + 3] = (value & 0xff)
-  } else {
-    objectWriteUInt32(this, value, offset, false)
-  }
-  return offset + 4
-}
-
-function checkIEEE754 (buf, value, offset, ext, max, min) {
-  if (offset + ext > buf.length) throw new RangeError('Index out of range')
-  if (offset < 0) throw new RangeError('Index out of range')
-}
-
-<<<<<<< HEAD
-var XATTR_CREATE = Constants.XATTR_CREATE;
-var XATTR_REPLACE = Constants.XATTR_REPLACE;
-var FS_NOMTIME = Constants.FS_NOMTIME;
-var FS_NOCTIME = Constants.FS_NOCTIME;
-
-var Encoding = require('../encoding.js');
-var Errors = require('../errors.js');
-var DirectoryEntry = require('../directory-entry.js');
-var OpenFileDescription = require('../open-file-description.js');
-var SuperNode = require('../super-node.js');
-var Node = require('../node.js');
-var Stats = require('../stats.js');
-var Buffer = require('../buffer.js');
-=======
-function writeFloat (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 23, 4)
-  return offset + 4
-}
-
-Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, true, noAssert)
-}
-
-Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, false, noAssert)
-}
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-function writeDouble (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 52, 8)
-  return offset + 8
-}
-
-Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, true, noAssert)
-}
-
-Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, false, noAssert)
-}
-
-// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
-Buffer.prototype.copy = function copy (target, targetStart, start, end) {
-  if (!start) start = 0
-  if (!end && end !== 0) end = this.length
-  if (targetStart >= target.length) targetStart = target.length
-  if (!targetStart) targetStart = 0
-  if (end > 0 && end < start) end = start
-
-  // Copy 0 bytes; we're done
-  if (end === start) return 0
-  if (target.length === 0 || this.length === 0) return 0
-
-  // Fatal error conditions
-  if (targetStart < 0) {
-    throw new RangeError('targetStart out of bounds')
-  }
-  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
-  if (end < 0) throw new RangeError('sourceEnd out of bounds')
-
-  // Are we oob?
-  if (end > this.length) end = this.length
-  if (target.length - targetStart < end - start) {
-    end = target.length - targetStart + start
-  }
-
-  var len = end - start
-  var i
-
-  if (this === target && start < targetStart && targetStart < end) {
-    // descending copy from end
-    for (i = len - 1; i >= 0; --i) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
-    // ascending copy from start
-    for (i = 0; i < len; ++i) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else {
-    Uint8Array.prototype.set.call(
-      target,
-      this.subarray(start, start + len),
-      targetStart
-    )
-  }
-
-  return len
-}
-
-// Usage:
-//    buffer.fill(number[, offset[, end]])
-//    buffer.fill(buffer[, offset[, end]])
-//    buffer.fill(string[, offset[, end]][, encoding])
-Buffer.prototype.fill = function fill (val, start, end, encoding) {
-  // Handle string cases:
-  if (typeof val === 'string') {
-    if (typeof start === 'string') {
-      encoding = start
-      start = 0
-      end = this.length
-    } else if (typeof end === 'string') {
-      encoding = end
-      end = this.length
-    }
-    if (val.length === 1) {
-      var code = val.charCodeAt(0)
-      if (code < 256) {
-        val = code
-      }
-    }
-    if (encoding !== undefined && typeof encoding !== 'string') {
-      throw new TypeError('encoding must be a string')
-    }
-    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
-      throw new TypeError('Unknown encoding: ' + encoding)
-    }
-  } else if (typeof val === 'number') {
-    val = val & 255
-  }
-
-  // Invalid ranges are not set to a default, so can range check early.
-  if (start < 0 || this.length < start || this.length < end) {
-    throw new RangeError('Out of range index')
-  }
-
-  if (end <= start) {
-    return this
-  }
-
-  start = start >>> 0
-  end = end === undefined ? this.length : end >>> 0
-
-  if (!val) val = 0
-
-  var i
-  if (typeof val === 'number') {
-    for (i = start; i < end; ++i) {
-      this[i] = val
-    }
-  } else {
-    var bytes = Buffer.isBuffer(val)
-      ? val
-      : utf8ToBytes(new Buffer(val, encoding).toString())
-    var len = bytes.length
-    for (i = 0; i < end - start; ++i) {
-      this[i + start] = bytes[i % len]
-    }
-  }
-
-  return this
-}
-
-// HELPER FUNCTIONS
-// ================
-
-var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
-
-function base64clean (str) {
-  // Node strips out invalid characters like \n and \t from the string, base64-js does not
-  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
-  // Node converts strings with length < 2 to ''
-  if (str.length < 2) return ''
-  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
-  while (str.length % 4 !== 0) {
-    str = str + '='
-  }
-  return str
-}
-
-function stringtrim (str) {
-  if (str.trim) return str.trim()
-  return str.replace(/^\s+|\s+$/g, '')
-}
-
-function toHex (n) {
-  if (n < 16) return '0' + n.toString(16)
-  return n.toString(16)
-}
-
-function utf8ToBytes (string, units) {
-  units = units || Infinity
-  var codePoint
-  var length = string.length
-  var leadSurrogate = null
-  var bytes = []
-
-  for (var i = 0; i < length; ++i) {
-    codePoint = string.charCodeAt(i)
-
-    // is surrogate component
-    if (codePoint > 0xD7FF && codePoint < 0xE000) {
-      // last char was a lead
-      if (!leadSurrogate) {
-        // no lead yet
-        if (codePoint > 0xDBFF) {
-          // unexpected trail
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        } else if (i + 1 === length) {
-          // unpaired lead
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        }
-
-        // valid lead
-        leadSurrogate = codePoint
-
-        continue
-      }
-
-      // 2 leads in a row
-      if (codePoint < 0xDC00) {
-        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-        leadSurrogate = codePoint
-        continue
-      }
-
-      // valid surrogate pair
-      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
-    } else if (leadSurrogate) {
-      // valid bmp char, but last char was a lead
-      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-    }
-
-    leadSurrogate = null
-
-    // encode utf8
-    if (codePoint < 0x80) {
-      if ((units -= 1) < 0) break
-      bytes.push(codePoint)
-    } else if (codePoint < 0x800) {
-      if ((units -= 2) < 0) break
-      bytes.push(
-        codePoint >> 0x6 | 0xC0,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x10000) {
-      if ((units -= 3) < 0) break
-      bytes.push(
-        codePoint >> 0xC | 0xE0,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x110000) {
-      if ((units -= 4) < 0) break
-      bytes.push(
-        codePoint >> 0x12 | 0xF0,
-        codePoint >> 0xC & 0x3F | 0x80,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else {
-      throw new Error('Invalid code point')
-    }
-  }
-
-  return bytes
-}
-
-function asciiToBytes (str) {
-  var byteArray = []
-  for (var i = 0; i < str.length; ++i) {
-    // Node's code seems to be doing this and not & 0x7F..
-    byteArray.push(str.charCodeAt(i) & 0xFF)
-  }
-  return byteArray
-}
-
-function utf16leToBytes (str, units) {
-  var c, hi, lo
-  var byteArray = []
-  for (var i = 0; i < str.length; ++i) {
-    if ((units -= 2) < 0) break
-
-    c = str.charCodeAt(i)
-    hi = c >> 8
-    lo = c % 256
-    byteArray.push(lo)
-    byteArray.push(hi)
-  }
-
-  return byteArray
-}
-
-function base64ToBytes (str) {
-  return base64.toByteArray(base64clean(str))
-}
-
-function blitBuffer (src, dst, offset, length) {
-  for (var i = 0; i < length; ++i) {
-    if ((i + offset >= dst.length) || (i >= src.length)) break
-    dst[i + offset] = src[i]
-  }
-  return i
-}
-
-function isnan (val) {
-  return val !== val // eslint-disable-line no-self-compare
-}
-
-},{"base64-js":29,"ieee754":30,"isarray":31,"buffer":11}],3:[function(require,module,exports) {
-var Buffer = require("buffer").Buffer;
-function FilerBuffer(subject, encoding, nonZero) {
-
-  // Automatically turn ArrayBuffer into Uint8Array so that underlying
-  // Buffer code doesn't just throw away and ignore ArrayBuffer data.
-  if (subject instanceof ArrayBuffer) {
-    subject = new Uint8Array(subject);
-  }
-
-  return new Buffer(subject, encoding, nonZero);
-};
-
-// Inherit prototype from Buffer
-FilerBuffer.prototype = Object.create(Buffer.prototype);
-FilerBuffer.prototype.constructor = FilerBuffer;
-
-// Also copy static methods onto FilerBuffer ctor
-Object.keys(Buffer).forEach(function (p) {
-  if (Buffer.hasOwnProperty(p)) {
-    FilerBuffer[p] = Buffer[p];
-  }
-<<<<<<< HEAD
-}
-
-
-/**
- * set extended attribute (refactor)
- */
-function set_extended_attribute (context, path, node, name, value, flag, callback) {
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      update_node_times(context, path, node, { ctime: Date.now() }, callback);
-    }
-  }
-
-  var xattrs = node.xattrs;
-
-  if (flag === XATTR_CREATE && xattrs.hasOwnProperty(name)) {
-    callback(new Errors.EEXIST('attribute already exists', path));
-  }
-  else if (flag === XATTR_REPLACE && !xattrs.hasOwnProperty(name)) {
-    callback(new Errors.ENOATTR(null, path));
-  }
-  else {
-    xattrs[name] = value;
-    context.putObject(node.id, node, update_time);
-  }
-=======
-});
-
-module.exports = FilerBuffer;
-},{"buffer":11}],50:[function(require,module,exports) {
-var global = arguments[3];
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-var FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;
-var IDB_RW = require('../constants.js').IDB_RW;
-var IDB_RO = require('../constants.js').IDB_RO;
-var Errors = require('../errors.js');
-var FilerBuffer = require('../buffer.js');
-
-var indexedDB = global.indexedDB || global.mozIndexedDB || global.webkitIndexedDB || global.msIndexedDB;
-
-function IndexedDBContext(db, mode) {
-  var transaction = db.transaction(FILE_STORE_NAME, mode);
-  this.objectStore = transaction.objectStore(FILE_STORE_NAME);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-}
-
-IndexedDBContext.prototype.clear = function (callback) {
-  try {
-    var request = this.objectStore.clear();
-    request.onsuccess = function (event) {
-      callback();
-    };
-    request.onerror = function (error) {
-      callback(error);
-    };
-  } catch (e) {
-    callback(e);
-  }
-};
-
-function _get(objectStore, key, callback) {
-  try {
-    var request = objectStore.get(key);
-    request.onsuccess = function onsuccess(event) {
-      var result = event.target.result;
-      callback(null, result);
-    };
-    request.onerror = function onerror(error) {
-      callback(error);
-    };
-  } catch (e) {
-    callback(e);
-  }
-}
-IndexedDBContext.prototype.getObject = function (key, callback) {
-  _get(this.objectStore, key, callback);
-};
-IndexedDBContext.prototype.getBuffer = function (key, callback) {
-  _get(this.objectStore, key, function (err, arrayBuffer) {
-    if (err) {
-      return callback(err);
-    }
-    callback(null, new FilerBuffer(arrayBuffer));
-  });
-};
-
-function _put(objectStore, key, value, callback) {
-  try {
-    var request = objectStore.put(value, key);
-    request.onsuccess = function onsuccess(event) {
-      var result = event.target.result;
-      callback(null, result);
-    };
-    request.onerror = function onerror(error) {
-      callback(error);
-    };
-  } catch (e) {
-    callback(e);
-  }
-}
-IndexedDBContext.prototype.putObject = function (key, value, callback) {
-  _put(this.objectStore, key, value, callback);
-};
-IndexedDBContext.prototype.putBuffer = function (key, uint8BackedBuffer, callback) {
-  _put(this.objectStore, key, uint8BackedBuffer.buffer, callback);
-};
-
-IndexedDBContext.prototype.delete = function (key, callback) {
-  try {
-    var request = this.objectStore.delete(key);
-    request.onsuccess = function onsuccess(event) {
-      var result = event.target.result;
-      callback(null, result);
-    };
-    request.onerror = function (error) {
-      callback(error);
-    };
-  } catch (e) {
-    callback(e);
-  }
-};
-
-function IndexedDB(name) {
-  this.name = name || FILE_SYSTEM_NAME;
-  this.db = null;
-}
-IndexedDB.isSupported = function () {
-  return !!indexedDB;
-};
-
-IndexedDB.prototype.open = function (callback) {
-  var that = this;
-
-  // Bail if we already have a db open
-  if (that.db) {
-    return callback();
-  }
-
-  // NOTE: we're not using versioned databases.
-  var openRequest = indexedDB.open(that.name);
-
-  // If the db doesn't exist, we'll create it
-  openRequest.onupgradeneeded = function onupgradeneeded(event) {
-    var db = event.target.result;
-
-    if (db.objectStoreNames.contains(FILE_STORE_NAME)) {
-      db.deleteObjectStore(FILE_STORE_NAME);
-    }
-    db.createObjectStore(FILE_STORE_NAME);
-  };
-
-  openRequest.onsuccess = function onsuccess(event) {
-    that.db = event.target.result;
-    callback();
-  };
-  openRequest.onerror = function onerror(error) {
-    callback(new Errors.EINVAL('IndexedDB cannot be accessed. If private browsing is enabled, disable it.'));
-  };
-};
-IndexedDB.prototype.getReadOnlyContext = function () {
-  // Due to timing issues in Chrome with readwrite vs. readonly indexeddb transactions
-  // always use readwrite so we can make sure pending commits finish before callbacks.
-  // See https://github.com/js-platform/filer/issues/128
-  return new IndexedDBContext(this.db, IDB_RW);
-};
-IndexedDB.prototype.getReadWriteContext = function () {
-  return new IndexedDBContext(this.db, IDB_RW);
-};
-
-module.exports = IndexedDB;
-},{"../constants.js":15,"../errors.js":5,"../buffer.js":3}],60:[function(require,module,exports) {
-/*
- * base64-arraybuffer
- * https://github.com/niklasvh/base64-arraybuffer
- *
- * Copyright (c) 2012 Niklas von Hertzen
- * Licensed under the MIT license.
- */
-(function () {
-  "use strict";
-
-  var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-  // Use a lookup table to find the index.
-  var lookup = new Uint8Array(256);
-  for (var i = 0; i < chars.length; i++) {
-    lookup[chars.charCodeAt(i)] = i;
-  }
-
-  exports.encode = function (arraybuffer) {
-    var bytes = new Uint8Array(arraybuffer),
-        i,
-        len = bytes.length,
-        base64 = "";
-
-    for (i = 0; i < len; i += 3) {
-      base64 += chars[bytes[i] >> 2];
-      base64 += chars[(bytes[i] & 3) << 4 | bytes[i + 1] >> 4];
-      base64 += chars[(bytes[i + 1] & 15) << 2 | bytes[i + 2] >> 6];
-      base64 += chars[bytes[i + 2] & 63];
-    }
-
-    if (len % 3 === 2) {
-      base64 = base64.substring(0, base64.length - 1) + "=";
-    } else if (len % 3 === 1) {
-      base64 = base64.substring(0, base64.length - 2) + "==";
-    }
-
-    return base64;
-  };
-
-  exports.decode = function (base64) {
-    var bufferLength = base64.length * 0.75,
-        len = base64.length,
-        i,
-        p = 0,
-        encoded1,
-        encoded2,
-        encoded3,
-        encoded4;
-
-    if (base64[base64.length - 1] === "=") {
-      bufferLength--;
-      if (base64[base64.length - 2] === "=") {
-        bufferLength--;
-      }
-    }
-
-    var arraybuffer = new ArrayBuffer(bufferLength),
-        bytes = new Uint8Array(arraybuffer);
-
-    for (i = 0; i < len; i += 4) {
-      encoded1 = lookup[base64.charCodeAt(i)];
-      encoded2 = lookup[base64.charCodeAt(i + 1)];
-      encoded3 = lookup[base64.charCodeAt(i + 2)];
-      encoded4 = lookup[base64.charCodeAt(i + 3)];
-
-      bytes[p++] = encoded1 << 2 | encoded2 >> 4;
-      bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;
-      bytes[p++] = (encoded3 & 3) << 6 | encoded4 & 63;
-    }
-
-    return arraybuffer;
-  };
-})();
-},{}],51:[function(require,module,exports) {
-var global = arguments[3];
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-var FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;
-var WSQL_VERSION = require('../constants.js').WSQL_VERSION;
-var WSQL_SIZE = require('../constants.js').WSQL_SIZE;
-var WSQL_DESC = require('../constants.js').WSQL_DESC;
-var Errors = require('../errors.js');
-var FilerBuffer = require('../buffer.js');
-var base64ArrayBuffer = require('base64-arraybuffer');
-
-function WebSQLContext(db, isReadOnly) {
-  var that = this;
-  this.getTransaction = function (callback) {
-    if (that.transaction) {
-      callback(that.transaction);
-      return;
-    }
-    // Either do readTransaction() (read-only) or transaction() (read/write)
-    db[isReadOnly ? 'readTransaction' : 'transaction'](function (transaction) {
-      that.transaction = transaction;
-      callback(transaction);
-    });
-  };
-}
-
-WebSQLContext.prototype.clear = function (callback) {
-  function onError(transaction, error) {
-    callback(error);
-  }
-  function onSuccess(transaction, result) {
-    callback(null);
-  }
-  this.getTransaction(function (transaction) {
-    transaction.executeSql("DELETE FROM " + FILE_STORE_NAME + ";", [], onSuccess, onError);
-  });
-};
-
-function _get(getTransaction, key, callback) {
-  function onSuccess(transaction, result) {
-    // If the key isn't found, return null
-    var value = result.rows.length === 0 ? null : result.rows.item(0).data;
-    callback(null, value);
-  }
-  function onError(transaction, error) {
-    callback(error);
-  }
-  getTransaction(function (transaction) {
-    transaction.executeSql("SELECT data FROM " + FILE_STORE_NAME + " WHERE id = ? LIMIT 1;", [key], onSuccess, onError);
-  });
-}
-WebSQLContext.prototype.getObject = function (key, callback) {
-  _get(this.getTransaction, key, function (err, result) {
-    if (err) {
-      return callback(err);
-    }
-
-    try {
-      if (result) {
-        result = JSON.parse(result);
-      }
-    } catch (e) {
-      return callback(e);
-    }
-
-    callback(null, result);
-  });
-};
-WebSQLContext.prototype.getBuffer = function (key, callback) {
-  _get(this.getTransaction, key, function (err, result) {
-    if (err) {
-      return callback(err);
-    }
-
-    // Deal with zero-length ArrayBuffers, which will be encoded as ''
-    if (result || result === '') {
-      var arrayBuffer = base64ArrayBuffer.decode(result);
-      result = new FilerBuffer(arrayBuffer);
-    }
-
-    callback(null, result);
-  });
-};
-
-function _put(getTransaction, key, value, callback) {
-  function onSuccess(transaction, result) {
-    callback(null);
-  }
-  function onError(transaction, error) {
-    callback(error);
-  }
-  getTransaction(function (transaction) {
-    transaction.executeSql("INSERT OR REPLACE INTO " + FILE_STORE_NAME + " (id, data) VALUES (?, ?);", [key, value], onSuccess, onError);
-  });
-}
-WebSQLContext.prototype.putObject = function (key, value, callback) {
-  var json = JSON.stringify(value);
-  _put(this.getTransaction, key, json, callback);
-};
-WebSQLContext.prototype.putBuffer = function (key, uint8BackedBuffer, callback) {
-  var base64 = base64ArrayBuffer.encode(uint8BackedBuffer.buffer);
-  _put(this.getTransaction, key, base64, callback);
-};
-
-WebSQLContext.prototype.delete = function (key, callback) {
-  function onSuccess(transaction, result) {
-    callback(null);
-  }
-  function onError(transaction, error) {
-    callback(error);
-  }
-  this.getTransaction(function (transaction) {
-    transaction.executeSql("DELETE FROM " + FILE_STORE_NAME + " WHERE id = ?;", [key], onSuccess, onError);
-  });
-};
-
-function WebSQL(name) {
-  this.name = name || FILE_SYSTEM_NAME;
-  this.db = null;
-}
-WebSQL.isSupported = function () {
-  return !!global.openDatabase;
-};
-
-WebSQL.prototype.open = function (callback) {
-  var that = this;
-
-  // Bail if we already have a db open
-  if (that.db) {
-    return callback();
-  }
-
-  var db = global.openDatabase(that.name, WSQL_VERSION, WSQL_DESC, WSQL_SIZE);
-  if (!db) {
-    callback("[WebSQL] Unable to open database.");
-    return;
-  }
-
-  function onError(transaction, error) {
-    if (error.code === 5) {
-      callback(new Errors.EINVAL('WebSQL cannot be accessed. If private browsing is enabled, disable it.'));
-    }
-    callback(error);
-  }
-  function onSuccess(transaction, result) {
-    that.db = db;
-    callback();
-  }
-
-  // Create the table and index we'll need to store the fs data.
-  db.transaction(function (transaction) {
-    function createIndex(transaction) {
-      transaction.executeSql("CREATE INDEX IF NOT EXISTS idx_" + FILE_STORE_NAME + "_id" + " on " + FILE_STORE_NAME + " (id);", [], onSuccess, onError);
-    }
-    transaction.executeSql("CREATE TABLE IF NOT EXISTS " + FILE_STORE_NAME + " (id unique, data TEXT);", [], createIndex, onError);
-  });
-};
-WebSQL.prototype.getReadOnlyContext = function () {
-  return new WebSQLContext(this.db, true);
-};
-WebSQL.prototype.getReadWriteContext = function () {
-  return new WebSQLContext(this.db, false);
-};
-
-module.exports = WebSQL;
-},{"../constants.js":15,"../errors.js":5,"../buffer.js":3,"base64-arraybuffer":60}],59:[function(require,module,exports) {
-
-// shim for using process in browser
-var process = module.exports = {};
-
-// cached from whatever global is present so that test runners that stub it
-// don't break things.  But we need to wrap it in a try catch in case it is
-// wrapped in strict mode code which doesn't define any globals.  It's inside a
-// function because try/catches deoptimize in certain engines.
-
-var cachedSetTimeout;
-var cachedClearTimeout;
-
-function defaultSetTimout() {
-    throw new Error('setTimeout has not been defined');
-}
-function defaultClearTimeout() {
-    throw new Error('clearTimeout has not been defined');
-}
-(function () {
-    try {
-        if (typeof setTimeout === 'function') {
-            cachedSetTimeout = setTimeout;
-        } else {
-            cachedSetTimeout = defaultSetTimout;
-        }
-    } catch (e) {
-        cachedSetTimeout = defaultSetTimout;
-    }
-    try {
-        if (typeof clearTimeout === 'function') {
-            cachedClearTimeout = clearTimeout;
-        } else {
-            cachedClearTimeout = defaultClearTimeout;
-        }
-    } catch (e) {
-        cachedClearTimeout = defaultClearTimeout;
-    }
-})();
-function runTimeout(fun) {
-    if (cachedSetTimeout === setTimeout) {
-        //normal enviroments in sane situations
-        return setTimeout(fun, 0);
-    }
-    // if setTimeout wasn't available but was latter defined
-    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
-        cachedSetTimeout = setTimeout;
-        return setTimeout(fun, 0);
-    }
-    try {
-        // when when somebody has screwed with setTimeout but no I.E. maddness
-        return cachedSetTimeout(fun, 0);
-    } catch (e) {
-        try {
-            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
-            return cachedSetTimeout.call(null, fun, 0);
-        } catch (e) {
-            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
-            return cachedSetTimeout.call(this, fun, 0);
-        }
-    }
-}
-function runClearTimeout(marker) {
-    if (cachedClearTimeout === clearTimeout) {
-        //normal enviroments in sane situations
-        return clearTimeout(marker);
-    }
-    // if clearTimeout wasn't available but was latter defined
-    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
-        cachedClearTimeout = clearTimeout;
-        return clearTimeout(marker);
-    }
-    try {
-        // when when somebody has screwed with setTimeout but no I.E. maddness
-        return cachedClearTimeout(marker);
-    } catch (e) {
-        try {
-            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
-            return cachedClearTimeout.call(null, marker);
-        } catch (e) {
-            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
-            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
-            return cachedClearTimeout.call(this, marker);
-        }
-    }
-}
-var queue = [];
-var draining = false;
-var currentQueue;
-var queueIndex = -1;
-
-function cleanUpNextTick() {
-    if (!draining || !currentQueue) {
-        return;
-    }
-    draining = false;
-    if (currentQueue.length) {
-        queue = currentQueue.concat(queue);
-    } else {
-        queueIndex = -1;
-    }
-    if (queue.length) {
-        drainQueue();
-    }
-}
-
-function drainQueue() {
-    if (draining) {
-        return;
-    }
-    var timeout = runTimeout(cleanUpNextTick);
-    draining = true;
-
-    var len = queue.length;
-    while (len) {
-        currentQueue = queue;
-        queue = [];
-        while (++queueIndex < len) {
-            if (currentQueue) {
-                currentQueue[queueIndex].run();
-            }
-        }
-        queueIndex = -1;
-        len = queue.length;
-    }
-    currentQueue = null;
-    draining = false;
-    runClearTimeout(timeout);
-}
-
-process.nextTick = function (fun) {
-    var args = new Array(arguments.length - 1);
-    if (arguments.length > 1) {
-        for (var i = 1; i < arguments.length; i++) {
-            args[i - 1] = arguments[i];
-        }
-    }
-    queue.push(new Item(fun, args));
-    if (queue.length === 1 && !draining) {
-        runTimeout(drainQueue);
-    }
-};
-
-// v8 likes predictible objects
-function Item(fun, array) {
-    this.fun = fun;
-    this.array = array;
-}
-Item.prototype.run = function () {
-    this.fun.apply(null, this.array);
-};
-process.title = 'browser';
-process.browser = true;
-process.env = {};
-process.argv = [];
-process.version = ''; // empty string to avoid regexp issues
-process.versions = {};
-
-function noop() {}
-
-<<<<<<< HEAD
-  function read_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.mode === 'DIRECTORY') {
-      callback(new Errors.EISDIR('the named file is a directory', ofd.path));
-    } else {
-      fileNode = result;
-      context.getBuffer(fileNode.data, handle_file_data);
-    }
-  }
-=======
-process.on = noop;
-process.addListener = noop;
-process.once = noop;
-process.off = noop;
-process.removeListener = noop;
-process.removeAllListeners = noop;
-process.emit = noop;
-process.prependListener = noop;
-process.prependOnceListener = noop;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-process.listeners = function (name) {
-    return [];
-};
-
-<<<<<<< HEAD
-function stat_file(context, path, callback) {
-  path = normalize(path);
-  var name = basename(path);
-  find_node(context, path, callback);
-}
-
-function fstat_file(context, ofd, callback) {
-  ofd.getNode(context, callback);
-}
-=======
-process.binding = function (name) {
-    throw new Error('process.binding is not supported');
-};
-
-process.cwd = function () {
-    return '/';
-};
-process.chdir = function (dir) {
-    throw new Error('process.chdir is not supported');
-};
-process.umask = function () {
-    return 0;
-};
-},{}],49:[function(require,module,exports) {
-var process = require("process");
-var define;
-/*global setImmediate: false, setTimeout: false, console: false */
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-/**
- * async.js shim, based on https://raw.github.com/caolan/async/master/lib/async.js Feb 18, 2014
- * Used under MIT - https://github.com/caolan/async/blob/master/LICENSE
- */
-
-(function () {
-
-<<<<<<< HEAD
-  if(ROOT_DIRECTORY_NAME == name) {
-    find_node(context, path, callback);
-  } else {
-    find_node(context, parentPath, read_directory_data);
-  }
-=======
-    var async = {};
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-=======
     this.debug(pattern, p, f)
 
     // should be impossible.
     // some invalid regexp stuff in the set.
     if (p === false) return false
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
     if (p === GLOBSTAR) {
       this.debug('GLOBSTAR', [pattern, p, f])
@@ -8232,21 +4947,6 @@ var define;
         }
       }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  function check_if_node_is_directory(error, result) {
-    if(error) {
-      callback(error);
-<<<<<<< HEAD
-    } else if(parentDirectoryNode.type !== NODE_TYPE_DIRECTORY || !parentDirectoryNode.data) {
-      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));
-=======
-    } else if(result.mode === 'DIRECTORY') {
-      callback(new Errors.EPERM('unlink not permitted on directories', name));
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-    } else {
-      update_file_node(null, result);
-=======
       // no match was found.
       // However, in partial mode, we can't say this is necessarily over.
       // If there's more *pattern* left, then
@@ -8256,7 +4956,6 @@ var define;
         if (fr === fl) return true
       }
       return false
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
     }
 
     // something other than **
@@ -8321,7 +5020,7 @@ function regExpEscape (s) {
   return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&')
 }
 
-},{"path":45,"brace-expansion":46}],7:[function(require,module,exports) {
+},{"path":"UUq2","brace-expansion":"dwX/"}],"D1Ra":[function(require,module,exports) {
 var Path = require('../path.js');
 var Errors = require('../errors.js');
 var Environment = require('./environment.js');
@@ -8418,16 +5117,6 @@ Shell.prototype.exec = function (path, args, callback) {
   fs.readFile(path, "utf8", function (error, data) {
     if (error) {
       callback(error);
-<<<<<<< HEAD
-    } else {
-      if(node.type === NODE_TYPE_SYMBOLIC_LINK) {
-        followedCount++;
-        if(followedCount > SYMLOOP_MAX){
-          callback(new Errors.ELOOP(null, path));
-        } else {
-          follow_symbolic_link(node.data);
-        }
-=======
       return;
     }
     try {
@@ -8473,7 +5162,6 @@ Shell.prototype.touch = function (path, options, callback) {
     if (error) {
       if (options.updateOnly === true) {
         callback();
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
       } else {
         createFile(path);
       }
@@ -8555,21 +5243,6 @@ Shell.prototype.ls = function (dir, options, callback) {
     return;
   }
 
-<<<<<<< HEAD
-  function follow_symbolic_link(data) {
-    data = normalize(data);
-    parentPath = dirname(data);
-    name = basename(data);
-    if(ROOT_DIRECTORY_NAME === name) {
-      context.getObject(SUPER_NODE_ID, read_root_directory_node);
-    } else {
-      find_node(context, parentPath, read_parent_directory_data);
-    }
-  }
-
-  if(ROOT_DIRECTORY_NAME === name) {
-    context.getObject(SUPER_NODE_ID, read_root_directory_node);
-=======
   function list(path, callback) {
     var pathname = Path.resolve(sh.pwd(), path);
     var result = [];
@@ -8587,16 +5260,10 @@ Shell.prototype.ls = function (dir, options, callback) {
             callback(error);
             return;
           }
-          var entry = {
-            path: Path.basename(name),
-            links: stats.nlinks,
-            size: stats.size,
-            modified: stats.mtime,
-            type: stats.type
-          };
+          var entry = stats;
 
           if (options.recursive && stats.type === 'DIRECTORY') {
-            list(Path.join(pathname, entry.path), function (error, items) {
+            list(Path.join(pathname, entry.name), function (error, items) {
               if (error) {
                 callback(error);
                 return;
@@ -8612,16 +5279,6 @@ Shell.prototype.ls = function (dir, options, callback) {
         });
       }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  if(length < 0) {
-    callback(new Errors.EINVAL('length cannot be negative'));
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  } else {
-    ofd.getNode(context, read_file_data);
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
       async.eachSeries(entries, getDirEntry, function (error) {
         callback(error, result);
       });
@@ -8674,68 +5331,9 @@ Shell.prototype.rm = function (path, options, callback) {
           return;
         }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  function setxattr(error, node) {
-    if(error) {
-      return callback(error);
-    }
-    set_extended_attribute(context, path, node, name, value, flag, callback);
-  }
-
-  if (typeof name != 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string', path));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
-  }
-  else if (flag !== null &&
-           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {
-    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE', path));
-  }
-  else {
-    find_node(context, path, setxattr);
-  }
-}
-
-function fsetxattr_file (context, ofd, name, value, flag, callback) {
-  function setxattr(error, node) {
-    if(error) {
-<<<<<<< HEAD
-      callback(error);
-    } else {
-      Node.create({
-        guid: context.guid,
-        id: superNode.rnode,
-        type: NODE_TYPE_DIRECTORY
-      }, function(error, result) {
-        if(error) {
-          callback(error);
-=======
-      return callback(error);
-    }
-    set_extended_attribute(context, ofd.path, node, name, value, flag, callback);
-  }
-
-  if (typeof name !== 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string'));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string'));
-  }
-  else if (flag !== null &&
-           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {
-    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE'));
-  }
-  else {
-    ofd.getNode(context, setxattr);
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
         // If dir is empty, delete it and we're done
         if (entries.length === 0) {
           fs.rmdir(pathname, callback);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
           return;
         }
 
@@ -8876,31 +5474,6 @@ Shell.prototype.find = function (path, options, callback) {
     return;
   }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  function write_directory_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      parentDirectoryData = result;
-      Node.create({
-        guid: context.guid,
-        type: NODE_TYPE_DIRECTORY
-      }, function(error, result) {
-        if(error) {
-          callback(error);
-          return;
-        }
-        directoryNode = result;
-        directoryNode.nlinks += 1;
-        context.putObject(directoryNode.id, directoryNode, write_directory_data);
-      });
-    }
-=======
-  if (typeof name != 'string') {
-    callback(new Errors.EINVAL());
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-=======
   function processPath(path, callback) {
     exec(path, function (err) {
       if (err) {
@@ -8911,7 +5484,6 @@ Shell.prototype.find = function (path, options, callback) {
       found.push(path);
       callback();
     });
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   }
 
   function maybeProcessPath(path, callback) {
@@ -8990,7 +5562,7 @@ Shell.prototype.find = function (path, options, callback) {
 };
 
 module.exports = Shell;
-},{"../path.js":4,"../errors.js":5,"./environment.js":23,"../../lib/async.js":19,"../encoding.js":20,"minimatch":25}],40:[function(require,module,exports) {
+},{"../path.js":"UzoP","../errors.js":"p8GN","./environment.js":"QMiB","../../lib/async.js":"u4Zs","../encoding.js":"03yF","minimatch":"Nt/K"}],"J4Qg":[function(require,module,exports) {
 // Based on https://github.com/diy/intercom.js/blob/master/lib/events.js
 // Copyright 2012 DIY Co Apache License, Version 2.0
 // http://www.apache.org/licenses/LICENSE-2.0
@@ -9004,26 +5576,8 @@ function removeItem(item, array) {
   return array;
 }
 
-<<<<<<< HEAD
-  function update_parent_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      parentDirectoryData[name] = new DirectoryEntry(directoryNode.id, NODE_TYPE_DIRECTORY);
-      context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);
-=======
 var EventEmitter = function EventEmitter() {};
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  function remove_xattr (error, node) {
-    if (error) {
-      return callback(error);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-    }
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 EventEmitter.createInterface = function (space) {
   var methods = {};
 
@@ -9044,30 +5598,12 @@ EventEmitter.createInterface = function (space) {
     }
   };
 
-<<<<<<< HEAD
-  function check_if_node_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else if(ROOT_DIRECTORY_NAME === name) {
-      callback(new Errors.EBUSY(null, path));
-    } else if(!_(result).has(name)) {
-      callback(new Errors.ENOENT(null, path));
-    } else {
-      parentDirectoryData = result;
-      directoryNode = parentDirectoryData[name].id;
-      context.getObject(directoryNode, check_if_node_is_directory);
-=======
   methods.trigger = function (name) {
     if (typeof this[space] !== 'undefined' && this[space].hasOwnProperty(name)) {
       var args = Array.prototype.slice.call(arguments, 1);
       for (var i = 0; i < this[space][name].length; i++) {
         this[space][name][i].apply(this[space][name][i], args);
       }
-<<<<<<< HEAD
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
     }
   };
 
@@ -9079,46 +5615,9 @@ EventEmitter.createInterface = function (space) {
     });
   };
 
-<<<<<<< HEAD
-  function check_if_node_is_directory(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type !== NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOTDIR(null, path));
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_directory_is_empty);
-=======
   return methods;
 };
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  function remove_xattr (error, node) {
-    if (error) {
-      return callback(error);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-    }
-
-    function update_time(error) {
-      if(error) {
-        callback(error);
-      } else {
-        update_node_times(context, ofd.path, node, { ctime: Date.now() }, callback);
-      }
-    }
-
-    var xattrs = node.xattrs;
-
-    if (!xattrs.hasOwnProperty(name)) {
-      callback(new Errors.ENOATTR());
-    }
-    else {
-      delete xattrs[name];
-      context.putObject(node.id, node, update_time);
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 var pvt = EventEmitter.createInterface('_handlers');
 EventEmitter.prototype._on = pvt.on;
 EventEmitter.prototype._off = pvt.off;
@@ -9135,7 +5634,7 @@ EventEmitter.prototype.trigger = pub.trigger;
 EventEmitter.prototype.removeAllListeners = pub.removeAllListeners;
 
 module.exports = EventEmitter;
-},{}],17:[function(require,module,exports) {
+},{}],"u7Jv":[function(require,module,exports) {
 var global = arguments[3];
 var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
 
@@ -9200,32 +5699,13 @@ function Intercom() {
     return;
   }
 
-<<<<<<< HEAD
-  if(ROOT_DIRECTORY_NAME === name) {
-    if(_(flags).contains(O_WRITE)) {
-      callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
-    } else {
-      find_node(context, path, set_file_node);
-    }
-=======
   if (document.attachEvent) {
     document.attachEvent('onstorage', storageHandler);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
   } else {
     global.addEventListener('storage', storageHandler, false);
   }
 }
 
-<<<<<<< HEAD
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type !== NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOENT(null, path));
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, check_if_file_exists);
-=======
 Intercom.prototype._transaction = function (fn) {
   var TIMEOUT = 1000;
   var WAIT = 20;
@@ -9237,40 +5717,14 @@ Intercom.prototype._transaction = function (fn) {
   function lock() {
     if (executed) {
       return;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     }
 
-<<<<<<< HEAD
-  function check_if_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData = result;
-      if(_(directoryData).has(name)) {
-        if(_(flags).contains(O_EXCLUSIVE)) {
-          callback(new Errors.ENOENT('O_CREATE and O_EXCLUSIVE are set, and the named file exists', path));
-        } else {
-          directoryEntry = directoryData[name];
-          if(directoryEntry.type === NODE_TYPE_DIRECTORY && _(flags).contains(O_WRITE)) {
-            callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
-          } else {
-            context.getObject(directoryEntry.id, check_if_symbolic_link);
-          }
-        }
-      } else {
-        if(!_(flags).contains(O_CREATE)) {
-          callback(new Errors.ENOENT('O_CREATE is not set and the named file does not exist', path));
-        } else {
-          write_file_node();
-        }
-=======
     var now = Date.now();
     var activeLock = localStorage.getItem(INDEX_LOCK) | 0;
     if (activeLock && now - activeLock < TIMEOUT) {
       if (!listening) {
         self._on('storage', lock);
         listening = true;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
       }
       waitTimer = setTimeout(lock, WAIT);
       return;
@@ -9282,45 +5736,16 @@ Intercom.prototype._transaction = function (fn) {
     unlock();
   }
 
-<<<<<<< HEAD
-  function check_if_symbolic_link(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      var node = result;
-      if(node.type === NODE_TYPE_SYMBOLIC_LINK) {
-        followedCount++;
-        if(followedCount > SYMLOOP_MAX){
-          callback(new Errors.ELOOP(null, path));
-        } else {
-          follow_symbolic_link(node.data);
-        }
-      } else {
-        set_file_node(undefined, node);
-      }
-=======
   function unlock() {
     if (listening) {
       self._off('storage', lock);
     }
     if (waitTimer) {
       clearTimeout(waitTimer);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     }
     localStorage.removeItem(INDEX_LOCK);
   }
 
-<<<<<<< HEAD
-  function follow_symbolic_link(data) {
-    data = normalize(data);
-    parentPath = dirname(data);
-    name = basename(data);
-    if(ROOT_DIRECTORY_NAME === name) {
-      if(_(flags).contains(O_WRITE)) {
-        callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
-      } else {
-        find_node(context, path, set_file_node);
-=======
   lock();
 };
 
@@ -9342,7 +5767,6 @@ Intercom.prototype._cleanup_emit = throttle(100, function () {
       if (messages[i].timestamp < threshold) {
         messages.splice(i, 1);
         changed++;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
       }
     }
     if (changed > 0) {
@@ -9389,21 +5813,6 @@ Intercom.prototype._once_expired = function (key, table) {
     return true;
   }
 
-<<<<<<< HEAD
-  function write_file_node() {
-    Node.create({
-      guid: context.guid,
-      type: NODE_TYPE_FILE
-    }, function(error, result) {
-      if(error) {
-        callback(error);
-        return;
-      }
-      fileNode = result;
-      fileNode.nlinks += 1;
-      context.putObject(fileNode.id, fileNode, write_file_data);
-    });
-=======
   var ttl = table[key].ttl || THRESHOLD_TTL_ONCE;
   var now = Date.now();
   var timestamp = table[key].timestamp;
@@ -9413,7 +5822,6 @@ Intercom.prototype._once_expired = function (key, table) {
 Intercom.prototype._localStorageChanged = function (event, field) {
   if (event && event.key) {
     return event.key === field;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
   }
 
   var currentValue = localStorage.getItem(field);
@@ -9452,19 +5860,8 @@ Intercom.prototype._onStorageEvent = function (event) {
     });
   }
 
-<<<<<<< HEAD
-  function update_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_FILE);
-      context.putObject(directoryNode.data, directoryData, update_time);
-    }
-  }
-=======
   this._trigger('storage', event);
 };
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
 Intercom.prototype._emit = function (name, message, id) {
   id = typeof id === 'string' || typeof id === 'number' ? String(id) : null;
@@ -9560,7 +5957,7 @@ Intercom.getInstance = function () {
 }();
 
 module.exports = Intercom;
-},{"./eventemitter.js":40,"../src/shared.js":15}],18:[function(require,module,exports) {
+},{"./eventemitter.js":"J4Qg","../src/shared.js":"3zBM"}],"VLEe":[function(require,module,exports) {
 var EventEmitter = require('../lib/eventemitter.js');
 var Path = require('./path.js');
 var Intercom = require('../lib/intercom.js');
@@ -9600,16 +5997,6 @@ function FSWatcher() {
     // See https://github.com/js-platform/filer/issues/105
     filename = Path.normalize(filename_);
 
-<<<<<<< HEAD
-  function read_file_data(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type === NODE_TYPE_DIRECTORY) {
-      callback(new Errors.EISDIR('the named file is a directory', ofd.path));
-    } else {
-      fileNode = result;
-      context.getBuffer(fileNode.data, handle_file_data);
-=======
     // Whether to watch beneath this path or not
     recursive = recursive_ === true;
     // If recursive, construct a path prefix portion for comparisons later
@@ -9617,7 +6004,6 @@ function FSWatcher() {
     // prefix). We also take care to allow for '/' on its own.
     if (recursive) {
       recursivePathPrefix = filename === '/' ? '/' : filename + '/';
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     }
 
     var intercom = Intercom.getInstance();
@@ -9634,14 +6020,14 @@ FSWatcher.prototype = new EventEmitter();
 FSWatcher.prototype.constructor = FSWatcher;
 
 module.exports = FSWatcher;
-},{"../lib/eventemitter.js":40,"./path.js":4,"../lib/intercom.js":17}],48:[function(require,module,exports) {
-var MODE_FILE = require('./constants.js').MODE_FILE;
+},{"../lib/eventemitter.js":"J4Qg","./path.js":"UzoP","../lib/intercom.js":"u7Jv"}],"ZECt":[function(require,module,exports) {
+var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;
 
 module.exports = function DirectoryEntry(id, type) {
   this.id = id;
-  this.type = type || MODE_FILE;
+  this.type = type || NODE_TYPE_FILE;
 };
-},{"./constants.js":16}],49:[function(require,module,exports) {
+},{"./constants.js":"iJA9"}],"XWaV":[function(require,module,exports) {
 var Errors = require('./errors.js');
 
 function OpenFileDescription(path, id, flags, position) {
@@ -9673,22 +6059,14 @@ OpenFileDescription.prototype.getNode = function (context, callback) {
 };
 
 module.exports = OpenFileDescription;
-},{"./errors.js":5}],50:[function(require,module,exports) {
+},{"./errors.js":"p8GN"}],"33JE":[function(require,module,exports) {
 var Constants = require('./constants.js');
 
-<<<<<<< HEAD
-  if(ROOT_DIRECTORY_NAME === name) {
-    find_node(context, path, callback);
-  } else {
-    find_node(context, parentPath, read_directory_data);
-  }
-=======
 function SuperNode(options) {
   var now = Date.now();
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
   this.id = Constants.SUPER_NODE_ID;
-  this.mode = Constants.MODE_META;
+  this.type = Constants.NODE_TYPE_META;
   this.atime = options.atime || now;
   this.ctime = options.ctime || now;
   this.mtime = options.mtime || now;
@@ -9708,34 +6086,40 @@ SuperNode.create = function (options, callback) {
 };
 
 module.exports = SuperNode;
-},{"./constants.js":16}],51:[function(require,module,exports) {
-var MODE_FILE = require('./constants.js').MODE_FILE;
+},{"./constants.js":"iJA9"}],"KKNo":[function(require,module,exports) {
+var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;
+var NODE_TYPE_DIRECTORY = require('./constants.js').NODE_TYPE_DIRECTORY;
+var NODE_TYPE_SYMBOLIC_LINK = require('./constants.js').NODE_TYPE_SYMBOLIC_LINK;
+var NODE_TYPE_META = require('./constants.js').NODE_TYPE_META;
 
-<<<<<<< HEAD
-  newpath = normalize(newpath);
-  var newname = basename(newpath);
-  var newParentPath = dirname(newpath);
-  var ctime = Date.now();
+var ROOT_DIRECTORY_NAME = require('./constants.js').ROOT_DIRECTORY_NAME;
 
-  var oldDirectoryNode;
-  var oldDirectoryData;
-  var newDirectoryNode;
-  var newDirectoryData;
-  var fileNodeID;
-  var fileNode;
+var S_IFREG = require('./constants.js').S_IFREG;
+var S_IFDIR = require('./constants.js').S_IFDIR;
+var S_IFLNK = require('./constants.js').S_IFLNK;
+
+var DEFAULT_FILE_PERMISSIONS = require('./constants.js').DEFAULT_FILE_PERMISSIONS;
+var DEFAULT_DIR_PERMISSIONS = require('./constants.js').DEFAULT_DIR_PERMISSIONS;
+
+function getMode(type, mode) {
+  switch (type) {
+    case NODE_TYPE_DIRECTORY:
+      return (mode || DEFAULT_DIR_PERMISSIONS) | S_IFDIR;
+    case NODE_TYPE_SYMBOLIC_LINK:
+      return (mode || DEFAULT_FILE_PERMISSIONS) | S_IFLNK;
+    /* jshint -W086 */
+    case NODE_TYPE_FILE:
+    // falls through
+    default:
+      return (mode || DEFAULT_FILE_PERMISSIONS) | S_IFREG;
+  }
+}
 
-  function update_time(error) {
-    if(error) {
-      callback(error);
-    } else {
-      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);
-    }
-=======
 function Node(options) {
   var now = Date.now();
 
   this.id = options.id;
-  this.mode = options.mode || MODE_FILE; // node type (file, directory, etc)
+  this.type = options.type || NODE_TYPE_FILE; // node type (file, directory, etc)
   this.size = options.size || 0; // size (bytes for files, entries for directories)
   this.atime = options.atime || now; // access time (will mirror ctime after creation)
   this.ctime = options.ctime || now; // creation/change time
@@ -9743,10 +6127,13 @@ function Node(options) {
   this.flags = options.flags || []; // file flags
   this.xattrs = options.xattrs || {}; // extended attributes
   this.nlinks = options.nlinks || 0; // links count
-  this.version = options.version || 0; // node version
-  this.blksize = undefined; // block size
-  this.nblocks = 1; // blocks count
   this.data = options.data; // id for data object
+  this.version = options.version || 1;
+
+  // permissions and flags
+  this.mode = options.mode || getMode(this.type);
+  this.uid = options.uid || 0x0; // owner name
+  this.gid = options.gid || 0x0; // group name
 }
 
 // Make sure the options object has an id on property,
@@ -9759,53 +6146,9 @@ function ensureID(options, prop, callback) {
       options[prop] = id;
       callback(err);
     });
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
   }
 }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-function getxattr(fs, context, path, name, callback) {
-  if (!pathCheck(path, callback)) return;
-  getxattr_file(context, path, name, callback);
-}
-
-<<<<<<< HEAD
-  function read_file_node(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      context.getObject(fileNodeID, update_file_node);
-    }
-  }
-
-  function check_if_new_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newDirectoryData = result;
-      if(_(newDirectoryData).has(newname)) {
-        callback(new Errors.EEXIST('newpath resolves to an existing file', newname));
-      } else {
-        newDirectoryData[newname] = oldDirectoryData[oldname];
-        fileNodeID = newDirectoryData[newname].id;
-        context.putObject(newDirectoryNode.data, newDirectoryData, read_file_node);
-      }
-    }
-=======
-function fgetxattr(fs, context, fd, name, callback) {
-  var ofd = fs.openFiles[fd];
-  if (!ofd) {
-    callback(new Errors.EBADF());
-  }
-  else {
-    fgetxattr_file(context, ofd, name, callback);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  }
-}
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 Node.create = function (options, callback) {
   // We expect both options.id and options.data to be provided/generated.
   ensureID(options, 'id', function (err) {
@@ -9814,24 +6157,10 @@ Node.create = function (options, callback) {
       return;
     }
 
-<<<<<<< HEAD
-  function check_if_old_file_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      oldDirectoryData = result;
-      if(!_(oldDirectoryData).has(oldname)) {
-        callback(new Errors.ENOENT('a component of either path prefix does not exist', oldname));
-      } else if(oldDirectoryData[oldname].type === NODE_TYPE_DIRECTORY) {
-        callback(new Errors.EPERM('oldpath refers to a directory'));
-      } else {
-        find_node(context, newParentPath, read_new_directory_data);
-=======
     ensureID(options, 'data', function (err) {
       if (err) {
         callback(err);
         return;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
       }
 
       callback(null, new Node(options));
@@ -9839,77 +6168,42 @@ Node.create = function (options, callback) {
   });
 };
 
-module.exports = Node;
-},{"./constants.js":16}],52:[function(require,module,exports) {
-var Constants = require('./constants.js');
+// Update the node's mode (permissions), taking file type bits into account.
+Node.setMode = function (mode, node) {
+  node.mode = getMode(node.type, mode);
+};
 
-function Stats(fileNode, devName) {
-  this.node = fileNode.id;
+module.exports = Node;
+},{"./constants.js":"iJA9"}],"6dsC":[function(require,module,exports) {
+var Constants = require('./constants.js');
+var Path = require('./path.js');
+
+function Stats(path, fileNode, devName) {
   this.dev = devName;
+  this.node = fileNode.id;
+  this.type = fileNode.type;
   this.size = fileNode.size;
   this.nlinks = fileNode.nlinks;
   this.atime = fileNode.atime;
   this.mtime = fileNode.mtime;
   this.ctime = fileNode.ctime;
-  this.type = fileNode.mode;
+  this.version = fileNode.version;
+  this.mode = fileNode.mode;
+  this.uid = fileNode.uid;
+  this.gid = fileNode.gid;
+  this.name = Path.basename(path);
 }
 
 Stats.prototype.isFile = function () {
-  return this.type === Constants.MODE_FILE;
+  return this.type === Constants.NODE_TYPE_FILE;
 };
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  var ofd = fs.openFiles[fd];
-  if (!ofd) {
-    callback(new Errors.EBADF());
-  }
-  else if (!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  }
-  else {
-    fsetxattr_file(context, ofd, name, value, flag, callback);
-  }
-}
-
-function removexattr(fs, context, path, name, callback) {
-  if (!pathCheck(path, callback)) return;
-  removexattr_file(context, path, name, callback);
-}
-
-function fremovexattr(fs, context, fd, name, callback) {
-  var ofd = fs.openFiles[fd];
-  if (!ofd) {
-    callback(new Errors.EBADF());
-  }
-  else if (!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  }
-<<<<<<< HEAD
-
-  function check_if_node_is_directory(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type === NODE_TYPE_DIRECTORY) {
-      callback(new Errors.EPERM('unlink not permitted on directories', name));
-    } else {
-      update_file_node(null, result);
-    }
-=======
-  else {
-    fremovexattr_file(context, ofd, name, callback);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  }
-}
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 Stats.prototype.isDirectory = function () {
-  return this.type === Constants.MODE_DIRECTORY;
+  return this.type === Constants.NODE_TYPE_DIRECTORY;
 };
 
 Stats.prototype.isSymbolicLink = function () {
-  return this.type === Constants.MODE_SYMBOLIC_LINK;
+  return this.type === Constants.NODE_TYPE_SYMBOLIC_LINK;
 };
 
 // These will always be false in Filer.
@@ -9918,7 +6212,7 @@ Stats.prototype.isSocket = Stats.prototype.isFIFO = Stats.prototype.isCharacterD
 };
 
 module.exports = Stats;
-},{"./constants.js":16}],22:[function(require,module,exports) {
+},{"./constants.js":"iJA9","./path.js":"UzoP"}],"bsBG":[function(require,module,exports) {
 
 var _ = require('../../lib/nodash.js');
 
@@ -9929,24 +6223,15 @@ var basename = Path.basename;
 var isAbsolutePath = Path.isAbsolute;
 var isNullPath = Path.isNull;
 
-<<<<<<< HEAD
-  function read_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else if(result.type !== NODE_TYPE_DIRECTORY) {
-      callback(new Errors.ENOTDIR(null, path));
-    } else {
-      directoryNode = result;
-      context.getObject(directoryNode.data, handle_directory_data);
-    }
-  }
-=======
 var Constants = require('../constants.js');
-var MODE_FILE = Constants.MODE_FILE;
-var MODE_DIRECTORY = Constants.MODE_DIRECTORY;
-var MODE_SYMBOLIC_LINK = Constants.MODE_SYMBOLIC_LINK;
-var MODE_META = Constants.MODE_META;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
+var NODE_TYPE_FILE = Constants.NODE_TYPE_FILE;
+var NODE_TYPE_DIRECTORY = Constants.NODE_TYPE_DIRECTORY;
+var NODE_TYPE_SYMBOLIC_LINK = Constants.NODE_TYPE_SYMBOLIC_LINK;
+var NODE_TYPE_META = Constants.NODE_TYPE_META;
+
+var DEFAULT_FILE_PERMISSIONS = Constants.DEFAULT_FILE_PERMISSIONS;
+var DEFAULT_DIR_PERMISSIONS = Constants.DEFAULT_DIR_PERMISSIONS;
+var FULL_READ_WRITE_EXEC_PERMISSIONS = Constants.FULL_READ_WRITE_EXEC_PERMISSIONS;
 
 var ROOT_DIRECTORY_NAME = Constants.ROOT_DIRECTORY_NAME;
 var SUPER_NODE_ID = Constants.SUPER_NODE_ID;
@@ -9965,13 +6250,6 @@ var XATTR_REPLACE = Constants.XATTR_REPLACE;
 var FS_NOMTIME = Constants.FS_NOMTIME;
 var FS_NOCTIME = Constants.FS_NOCTIME;
 
-<<<<<<< HEAD
-  if(ROOT_DIRECTORY_NAME === name) {
-    callback(new Errors.EEXIST(null, name));
-  } else {
-    find_node(context, parentPath, read_directory_data);
-  }
-=======
 var Encoding = require('../encoding.js');
 var Errors = require('../errors.js');
 var DirectoryEntry = require('../directory-entry.js');
@@ -9980,7 +6258,6 @@ var SuperNode = require('../super-node.js');
 var Node = require('../node.js');
 var Stats = require('../stats.js');
 var Buffer = require('../buffer.js');
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
 /**
  * Update node times. Only passed times are modified (undefined times are ignored)
@@ -9996,32 +6273,6 @@ function update_node_times(context, path, node, times, callback) {
     delete times.mtime;
   }
 
-<<<<<<< HEAD
-  function write_file_node() {
-    Node.create({
-      guid: context.guid,
-      type: NODE_TYPE_SYMBOLIC_LINK
-    }, function(error, result) {
-      if(error) {
-        callback(error);
-        return;
-      }
-      fileNode = result;
-      fileNode.nlinks += 1;
-
-      // If the srcpath isn't absolute, resolve it relative to the dstpath
-      // but store both versions, since we'll use the relative one in readlink().
-      if(!isAbsolutePath(srcpath)) {
-        fileNode.symlink_relpath = srcpath;
-        srcpath = Path.resolve(parentPath, srcpath); 
-      }
-
-      fileNode.size = srcpath.length;
-      fileNode.data = srcpath;
-      
-      context.putObject(fileNode.id, fileNode, update_directory_data);
-    });
-=======
   // Only do the update if required (i.e., times are still present)
   var update = false;
   if (times.ctime) {
@@ -10039,7 +6290,6 @@ function update_node_times(context, path, node, times, callback) {
   if (times.mtime) {
     node.mtime = times.mtime;
     update = true;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
   }
 
   function complete(error) {
@@ -10049,20 +6299,10 @@ function update_node_times(context, path, node, times, callback) {
     callback(error);
   }
 
-<<<<<<< HEAD
-  function update_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_SYMBOLIC_LINK);
-      context.putObject(directoryNode.data, directoryData, update_time);
-    }
-=======
   if (update) {
     context.putObject(node.id, node, complete);
   } else {
     complete();
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
   }
 }
 
@@ -10071,9 +6311,9 @@ function update_node_times(context, path, node, times, callback) {
  */
 // in: file or directory path
 // out: new node representing file/directory
-function make_node(context, path, mode, callback) {
-  if (mode !== MODE_DIRECTORY && mode !== MODE_FILE) {
-    return callback(new Errors.EINVAL('mode must be a directory or file', path));
+function make_node(context, path, type, callback) {
+  if (type !== NODE_TYPE_DIRECTORY && type !== NODE_TYPE_FILE) {
+    return callback(new Errors.EINVAL('type must be a directory or file', path));
   }
 
   path = normalize(path);
@@ -10088,7 +6328,7 @@ function make_node(context, path, mode, callback) {
   function create_node_in_parent(error, parentDirectoryNode) {
     if (error) {
       callback(error);
-    } else if (parentDirectoryNode.mode !== MODE_DIRECTORY) {
+    } else if (parentDirectoryNode.type !== NODE_TYPE_DIRECTORY) {
       callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));
     } else {
       parentNode = parentDirectoryNode;
@@ -10101,161 +6341,6 @@ function make_node(context, path, mode, callback) {
     if (!error && result) {
       callback(new Errors.EEXIST('path name already exists', path));
     } else if (error && !(error instanceof Errors.ENOENT)) {
-<<<<<<< HEAD
-      callback(error);
-    } else {
-      context.getObject(parentNode.data, create_node);
-    }
-  }
-
-<<<<<<< HEAD
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  } else {
-    futimes_file(context, ofd, atime, mtime, callback);
-=======
-  // Create the new node
-  function create_node(error, result) {
-    if (error) {
-      callback(error);
-    } else {
-      parentNodeData = result;
-      Node.create({ guid: context.guid, mode: mode }, function (error, result) {
-        if (error) {
-          callback(error);
-          return;
-        }
-        node = result;
-        node.nlinks += 1;
-        context.putObject(node.id, node, update_parent_node_data);
-      });
-    }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  }
-
-<<<<<<< HEAD
-  function check_if_symbolic(error, fileNode) {
-    if(error) {
-      callback(error);
-    } else {
-      if(fileNode.type !== NODE_TYPE_SYMBOLIC_LINK) {
-        callback(new Errors.EINVAL('path not a symbolic link', path));
-      } else {
-        // If we were originally given a relative path, return that now vs. the
-        // absolute path we've generated and use elsewhere internally.
-        var target = fileNode.symlink_relpath ? fileNode.symlink_relpath : fileNode.data;
-        callback(null, target);
-      }
-=======
-  // Update parent node time
-  function update_time(error) {
-    if (error) {
-      callback(error);
-    } else {
-      var now = Date.now();
-      update_node_times(context, parentPath, node, { mtime: now, ctime: now }, callback);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-    }
-  }
-
-<<<<<<< HEAD
-  oldpath = normalize(oldpath);
-  newpath = normalize(newpath);
-
-<<<<<<< HEAD
-  function read_file_data (error, node) {
-    if (error) {
-      callback(error);
-    } else if(node.type === NODE_TYPE_DIRECTORY ) {
-      callback(new Errors.EISDIR(null, path));
-    } else{
-      fileNode = node;
-      context.getBuffer(fileNode.data, truncate_file_data);
-    }
-  }
-=======
-  var oldParentPath = Path.dirname(oldpath);
-  var newParentPath = Path.dirname(oldpath);
-  var oldName = Path.basename(oldpath);
-  var newName = Path.basename(newpath);
-  var oldParentDirectory, oldParentData;
-  var newParentDirectory, newParentData;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-
-  function update_times(error, newNode) {
-    if(error) {
-      callback(error);
-    } else {
-      update_node_times(context, newpath,  newNode, { ctime: Date.now() }, callback);
-    }
-  }
-
-  function read_new_directory(error) {
-    if(error) {
-      callback(error);
-    } else {
-      context.getObject(newParentData[newName].id, update_times);
-    }
-  }
-
-  function update_old_parent_directory_data(error) {
-    if(error) {
-      callback(error);
-    } else {
-      if(oldParentDirectory.id === newParentDirectory.id) {
-        oldParentData = newParentData;
-      }
-      delete oldParentData[oldName];
-      context.putObject(oldParentDirectory.data, oldParentData, read_new_directory);
-    }
-  }
-
-  function update_new_parent_directory_data(error) {
-    if(error) {
-      callback(error);
-<<<<<<< HEAD
-    } else if(node.type === NODE_TYPE_DIRECTORY ) {
-      callback(new Errors.EISDIR());
-    } else{
-      fileNode = node;
-      context.getBuffer(fileNode.data, truncate_file_data);
-=======
-    } else {
-      newParentData[newName] = oldParentData[oldName];
-      context.putObject(newParentDirectory.data, newParentData, update_old_parent_directory_data);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-    }
-  }
-
-  function check_if_new_directory_exists(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newParentData = result;
-      if(_(newParentData).has(newName)) {
-        remove_directory(context, newpath, update_new_parent_directory_data);
-      } else {
-        update_new_parent_directory_data();
-      }
-    }
-  }
-
-  function read_new_parent_directory_data(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      newParentDirectory = result;
-      context.getObject(newParentDirectory.data, check_if_new_directory_exists);
-    }
-  }
-
-  function get_new_parent_directory(error, result) {
-    if(error) {
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
       callback(error);
     } else {
       context.getObject(parentNode.data, create_node);
@@ -10268,7 +6353,10 @@ function make_node(context, path, mode, callback) {
       callback(error);
     } else {
       parentNodeData = result;
-      Node.create({ guid: context.guid, mode: mode }, function (error, result) {
+      Node.create({
+        guid: context.guid,
+        type: type
+      }, function (error, result) {
         if (error) {
           callback(error);
           return;
@@ -10280,110 +6368,22 @@ function make_node(context, path, mode, callback) {
     }
   }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  if (typeof atime !== 'number' || typeof mtime !== 'number') {
-    callback(new Errors.EINVAL('atime and mtime must be number', path));
-  }
-  else if (atime < 0 || mtime < 0) {
-    callback(new Errors.EINVAL('atime and mtime must be positive integers', path));
-  }
-  else {
-    find_node(context, path, update_times);
-=======
-  function unlink_old_file(error) {
-    if(error) {
-=======
   // Update parent node time
   function update_time(error) {
     if (error) {
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
       callback(error);
     } else {
       var now = Date.now();
       update_node_times(context, parentPath, node, { mtime: now, ctime: now }, callback);
     }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
   }
 
-  function check_node_type(error, node) {
-    if(error) {
-=======
-  // Update the parent nodes data
-  function update_parent_node_data(error) {
-    if (error) {
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-      callback(error);
-    } else if(node.mode === 'DIRECTORY') {
-      find_node(context, oldParentPath, read_parent_directory_data);
-    } else {
-<<<<<<< HEAD
-      link_node(context, oldpath, newpath, unlink_old_file);
-    }
-  }
-
-<<<<<<< HEAD
-  if (typeof atime !== 'number' || typeof mtime !== 'number') {
-    callback(new Errors.EINVAL('atime and mtime must be a number'));
-  }
-  else if (atime < 0 || mtime < 0) {
-    callback(new Errors.EINVAL('atime and mtime must be positive integers'));
-  }
-  else {
-    ofd.getNode(context, update_times);
-  }
-}
-
-<<<<<<< HEAD
-function setxattr_file(context, path, name, value, flag, callback) {
-  path = normalize(path);
-
-  function setxattr(error, node) {
-    if(error) {
-      return callback(error);
-    }
-    set_extended_attribute(context, path, node, name, value, flag, callback);
-  }
-
-  if (typeof name !== 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string', path));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
-  }
-  else if (flag !== null &&
-           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {
-    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE', path));
-  }
-  else {
-    find_node(context, path, setxattr);
-  }
-=======
-  find_node(context, oldpath, check_node_type);
-}
-
-function symlink(fs, context, srcpath, dstpath, type, callback) {
-  // NOTE: we support passing the `type` arg, but ignore it.
-  callback = arguments[arguments.length - 1];
-  if(!pathCheck(srcpath, callback)) return;
-  if(!pathCheck(dstpath, callback)) return;
-  make_symbolic_link(context, srcpath, dstpath, callback);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-}
-
-function readlink(fs, context, path, callback) {
-  if(!pathCheck(path, callback)) return;
-  read_link(context, path, callback);
-}
-=======
-=======
   // Update the parent nodes data
   function update_parent_node_data(error) {
     if (error) {
       callback(error);
     } else {
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
-      parentNodeData[name] = new DirectoryEntry(node.id, mode);
+      parentNodeData[name] = new DirectoryEntry(node.id, type);
       context.putObject(parentNode.data, parentNodeData, update_time);
     }
   }
@@ -10409,7 +6409,7 @@ function find_node(context, path, callback) {
   function read_root_directory_node(error, superNode) {
     if (error) {
       callback(error);
-    } else if (!superNode || superNode.mode !== MODE_META || !superNode.rnode) {
+    } else if (!superNode || superNode.type !== NODE_TYPE_META || !superNode.rnode) {
       callback(new Errors.EFILESYSTEMERROR());
     } else {
       context.getObject(superNode.rnode, check_root_directory_node);
@@ -10431,23 +6431,13 @@ function find_node(context, path, callback) {
   function read_parent_directory_data(error, parentDirectoryNode) {
     if (error) {
       callback(error);
-    } else if (parentDirectoryNode.mode !== MODE_DIRECTORY || !parentDirectoryNode.data) {
+    } else if (parentDirectoryNode.type !== NODE_TYPE_DIRECTORY || !parentDirectoryNode.data) {
       callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));
     } else {
       context.getObject(parentDirectoryNode.data, get_node_from_parent_directory_data);
     }
   }
 
-<<<<<<< HEAD
-  if (typeof name !== 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string', path));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
-  }
-  else {
-    find_node(context, path, get_xattr);
-=======
   // in: parent directory data
   // out: searched node
   function get_node_from_parent_directory_data(error, parentDirectoryData) {
@@ -10461,14 +6451,13 @@ function find_node(context, path, callback) {
         context.getObject(nodeId, is_symbolic_link);
       }
     }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
   }
 
   function is_symbolic_link(error, node) {
     if (error) {
       callback(error);
     } else {
-      if (node.mode == MODE_SYMBOLIC_LINK) {
+      if (node.type === NODE_TYPE_SYMBOLIC_LINK) {
         followedCount++;
         if (followedCount > SYMLOOP_MAX) {
           callback(new Errors.ELOOP(null, path));
@@ -10485,92 +6474,16 @@ function find_node(context, path, callback) {
     data = normalize(data);
     parentPath = dirname(data);
     name = basename(data);
-    if (ROOT_DIRECTORY_NAME == name) {
+    if (ROOT_DIRECTORY_NAME === name) {
       context.getObject(SUPER_NODE_ID, read_root_directory_node);
     } else {
       find_node(context, parentPath, read_parent_directory_data);
     }
   }
 
-<<<<<<< HEAD
-  if (typeof name !== 'string') {
-    callback(new Errors.EINVAL());
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string'));
-  }
-  else {
-    ofd.getNode(context, get_xattr);
-=======
-  if (ROOT_DIRECTORY_NAME == name) {
+  if (ROOT_DIRECTORY_NAME === name) {
     context.getObject(SUPER_NODE_ID, read_root_directory_node);
   } else {
-<<<<<<< HEAD
-<<<<<<< HEAD
-    ftruncate_file(context, ofd, length, callback);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  }
-}
-
-module.exports = {
-  ensureRootDirectory: ensure_root_directory,
-  open: open,
-  close: close,
-  mknod: mknod,
-  mkdir: mkdir,
-  rmdir: rmdir,
-  unlink: unlink,
-  stat: stat,
-  fstat: fstat,
-  link: link,
-  read: read,
-  readFile: readFile,
-  write: write,
-  writeFile: writeFile,
-  appendFile: appendFile,
-  exists: exists,
-  getxattr: getxattr,
-  fgetxattr: fgetxattr,
-  setxattr: setxattr,
-  fsetxattr: fsetxattr,
-  removexattr: removexattr,
-  fremovexattr: fremovexattr,
-  lseek: lseek,
-  readdir: readdir,
-  utimes: utimes,
-  futimes: futimes,
-  rename: rename,
-  symlink: symlink,
-  readlink: readlink,
-  lstat: lstat,
-  truncate: truncate,
-  ftruncate: ftruncate
-};
-
-},{"../../lib/nodash.js":4,"../buffer.js":14,"../constants.js":15,"../directory-entry.js":16,"../encoding.js":17,"../errors.js":18,"../node.js":23,"../open-file-description.js":24,"../path.js":25,"../stats.js":33,"../super-node.js":34}],20:[function(require,module,exports){
-var _ = require('../../lib/nodash.js');
-
-var isNullPath = require('../path.js').isNull;
-var nop = require('../shared.js').nop;
-
-var Constants = require('../constants.js');
-var FILE_SYSTEM_NAME = Constants.FILE_SYSTEM_NAME;
-var FS_FORMAT = Constants.FS_FORMAT;
-var FS_READY = Constants.FS_READY;
-var FS_PENDING = Constants.FS_PENDING;
-var FS_ERROR = Constants.FS_ERROR;
-var FS_NODUPEIDCHECK = Constants.FS_NODUPEIDCHECK;
-
-var providers = require('../providers/index.js');
-
-var Shell = require('../shell/shell.js');
-var Intercom = require('../../lib/intercom.js');
-var FSWatcher = require('../fs-watcher.js');
-var Errors = require('../errors.js');
-var defaultGuidFn = require('../shared.js').guid;
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
     find_node(context, parentPath, read_parent_directory_data);
   }
 }
@@ -10587,70 +6500,6 @@ function set_extended_attribute(context, path, node, name, value, flag, callback
     }
   }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-  if (typeof name !== 'string') {
-    callback(new Errors.EINVAL('attribute name must be a string'));
-  }
-  else if (!name) {
-    callback(new Errors.EINVAL('attribute name cannot be an empty string'));
-  }
-  else {
-    ofd.getNode(context, remove_xattr);
-  }
-}
-
-function validate_flags(flags) {
-  if(!_(O_FLAGS).has(flags)) {
-    return null;
-  }
-  return O_FLAGS[flags];
-}
-
-function validate_file_options(options, enc, fileMode){
-  if(!options) {
-    options = { encoding: enc, flag: fileMode };
-  } else if(typeof options === "function") {
-    options = { encoding: enc, flag: fileMode };
-  } else if(typeof options === "string") {
-    options = { encoding: options, flag: fileMode };
-=======
-  if (typeof path_or_fd == 'string') {
-    path = path_or_fd;
-    find_node(context, path_or_fd, set_xattr);
-  } else if ((typeof path_or_fd === 'undefined' ? 'undefined' : _typeof(path_or_fd)) == 'object' && typeof path_or_fd.id == 'string') {
-    path = path_or_fd.path;
-    context.getObject(path_or_fd.id, set_xattr);
-  } else {
-    callback(new Errors.EINVAL('path or file descriptor of wrong type', path_or_fd));
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  }
-}
-
-<<<<<<< HEAD
-function pathCheck(path, allowRelative, callback) {
-  var err;
-
-  if(typeof allowRelative === 'function') {
-    callback = allowRelative;
-    allowRelative = false;
-  }
-
-  if(!path) {
-    err = new Errors.EINVAL('Path must be a string', path);
-  } else if(isNullPath(path)) {
-    err = new Errors.EINVAL('Path must be a string without null bytes.', path);
-  } else if(!allowRelative && !isAbsolutePath(path)) {
-    err = new Errors.EINVAL('Path must be absolute.', path);
-  }
-
-=======
-// Default callback that logs an error if passed in
-function defaultCallback(err) {
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-  if(err) {
-    console.error('Filer error: ', err);
-=======
   var xattrs = node.xattrs;
 
   if (flag === XATTR_CREATE && xattrs.hasOwnProperty(name)) {
@@ -10660,7 +6509,6 @@ function defaultCallback(err) {
   } else {
     xattrs[name] = value;
     context.putObject(node.id, node, update_time);
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   }
 }
 
@@ -10676,27 +6524,6 @@ function ensure_root_directory(context, callback) {
   var directoryNode;
   var directoryData;
 
-<<<<<<< HEAD
-function open(fs, context, path, flags, mode, callback) {
-  /**
-   * NOTE: we support the same signature as node with a `mode` arg,
-   * but ignore it. We need to add it.  Here is what node.js does:
-   * function open(path, flags, mode, callback) {
-   *    path = getPathFromURL(path);
-   *  validatePath(path);
-   *  const flagsNumber = stringToFlags(flags);
-   *  if (arguments.length < 4) {
-   *    callback = makeCallback(mode);
-   *    mode = 0o666;
-   *  } else {
-   *    mode = validateAndMaskMode(mode, 'mode', 0o666);
-   *    callback = makeCallback(callback);
-   * }
-  */
-
-  callback = arguments[arguments.length - 1];
-  if(!pathCheck(path, callback)) return;
-=======
   function ensure_super_node(error, existingNode) {
     if (!error && existingNode) {
       // Another instance has beat us and already created the super node.
@@ -10714,13 +6541,16 @@ function open(fs, context, path, flags, mode, callback) {
       });
     }
   }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
   function write_directory_node(error) {
     if (error) {
       callback(error);
     } else {
-      Node.create({ guid: context.guid, id: superNode.rnode, mode: MODE_DIRECTORY }, function (error, result) {
+      Node.create({
+        guid: context.guid,
+        id: superNode.rnode,
+        type: NODE_TYPE_DIRECTORY
+      }, function (error, result) {
         if (error) {
           callback(error);
           return;
@@ -10741,49 +6571,7 @@ function open(fs, context, path, flags, mode, callback) {
     }
   }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-function mknod(fs, context, path, type, callback) {
-  if(!pathCheck(path, callback)) return;
-  make_node(context, path, type, callback);
-}
-
-function mkdir(fs, context, path, mode, callback) {
-  if (arguments.length < 5) {
-    callback = mode;
-    mode = FULL_READ_WRITE_EXEC_PERMISSIONS;
-  } else {
-    mode = validateAndMaskMode(mode, FULL_READ_WRITE_EXEC_PERMISSIONS, callback);
-    if(!mode) return;
-  }
- 
-  if(!pathCheck(path, callback)) return;
-  make_directory(context, path, callback);
-=======
-<<<<<<< HEAD
-  // Expose Shell constructor
-  this.Shell = Shell.bind(undefined, this);
-
-  // Safely expose the list of open files and file
-  // descriptor management functions
-  var openFiles = {};
-  var nextDescriptor = FIRST_DESCRIPTOR;
-  Object.defineProperty(this, "openFiles", {
-    get: function() { return openFiles; }
-  });
-  this.allocDescriptor = function(openFileDescription) {
-    var fd = nextDescriptor ++;
-    openFiles[fd] = openFileDescription;
-    return fd;
-  };
-  this.releaseDescriptor = function(fd) {
-    delete openFiles[fd];
-  };
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   context.getObject(SUPER_NODE_ID, ensure_super_node);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 }
 
 /**
@@ -10805,12 +6593,7 @@ function make_directory(context, path, callback) {
     } else if (error && !(error instanceof Errors.ENOENT)) {
       callback(error);
     } else {
-<<<<<<< HEAD
-      var stats = new Stats(path, result, fs.name);
-      callback(null, stats);
-=======
       find_node(context, parentPath, read_parent_directory_data);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     }
   }
 
@@ -10818,13 +6601,8 @@ function make_directory(context, path, callback) {
     if (error) {
       callback(error);
     } else {
-<<<<<<< HEAD
-      var stats = new Stats(ofd.path, result, fs.name);
-      callback(null, stats);
-=======
       parentDirectoryNode = result;
       context.getObject(parentDirectoryNode.data, write_directory_node);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     }
   }
 
@@ -10833,7 +6611,10 @@ function make_directory(context, path, callback) {
       callback(error);
     } else {
       parentDirectoryData = result;
-      Node.create({ guid: context.guid, mode: MODE_DIRECTORY }, function (error, result) {
+      Node.create({
+        guid: context.guid,
+        type: NODE_TYPE_DIRECTORY
+      }, function (error, result) {
         if (error) {
           callback(error);
           return;
@@ -10867,7 +6648,7 @@ function make_directory(context, path, callback) {
     if (error) {
       callback(error);
     } else {
-      parentDirectoryData[name] = new DirectoryEntry(directoryNode.id, MODE_DIRECTORY);
+      parentDirectoryData[name] = new DirectoryEntry(directoryNode.id, NODE_TYPE_DIRECTORY);
       context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);
     }
   }
@@ -10900,7 +6681,7 @@ function remove_directory(context, path, callback) {
   function check_if_node_exists(error, result) {
     if (error) {
       callback(error);
-    } else if (ROOT_DIRECTORY_NAME == name) {
+    } else if (ROOT_DIRECTORY_NAME === name) {
       callback(new Errors.EBUSY(null, path));
     } else if (!_(result).has(name)) {
       callback(new Errors.ENOENT(null, path));
@@ -10914,7 +6695,7 @@ function remove_directory(context, path, callback) {
   function check_if_node_is_directory(error, result) {
     if (error) {
       callback(error);
-    } else if (result.mode != MODE_DIRECTORY) {
+    } else if (result.type !== NODE_TYPE_DIRECTORY) {
       callback(new Errors.ENOTDIR(null, path));
     } else {
       directoryNode = result;
@@ -10922,19 +6703,6 @@ function remove_directory(context, path, callback) {
     }
   }
 
-<<<<<<< HEAD
-    fstat_file(context, ofd, function(err, fstatResult) {
-      if(err) {
-        cleanup();
-        return callback(err);
-      }
-
-      var stats = new Stats(ofd.path, fstatResult, fs.name);
-
-      if(stats.isDirectory()) {
-        cleanup();
-        return callback(new Errors.EISDIR('illegal operation on directory', path));
-=======
   function check_if_directory_is_empty(error, result) {
     if (error) {
       callback(error);
@@ -10944,7 +6712,6 @@ function remove_directory(context, path, callback) {
         callback(new Errors.ENOTEMPTY(null, path));
       } else {
         remove_directory_entry_from_parent_directory_node();
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
       }
     }
   }
@@ -10995,7 +6762,7 @@ function open_file(context, path, flags, callback) {
 
   var followedCount = 0;
 
-  if (ROOT_DIRECTORY_NAME == name) {
+  if (ROOT_DIRECTORY_NAME === name) {
     if (_(flags).contains(O_WRITE)) {
       callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
     } else {
@@ -11008,7 +6775,7 @@ function open_file(context, path, flags, callback) {
   function read_directory_data(error, result) {
     if (error) {
       callback(error);
-    } else if (result.mode !== MODE_DIRECTORY) {
+    } else if (result.type !== NODE_TYPE_DIRECTORY) {
       callback(new Errors.ENOENT(null, path));
     } else {
       directoryNode = result;
@@ -11026,7 +6793,7 @@ function open_file(context, path, flags, callback) {
           callback(new Errors.ENOENT('O_CREATE and O_EXCLUSIVE are set, and the named file exists', path));
         } else {
           directoryEntry = directoryData[name];
-          if (directoryEntry.type == MODE_DIRECTORY && _(flags).contains(O_WRITE)) {
+          if (directoryEntry.type === NODE_TYPE_DIRECTORY && _(flags).contains(O_WRITE)) {
             callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
           } else {
             context.getObject(directoryEntry.id, check_if_symbolic_link);
@@ -11041,138 +6808,13 @@ function open_file(context, path, flags, callback) {
       }
     }
   }
-<<<<<<< HEAD
-  stat(fs, context, path, cb);
-}
-
-// Based on https://github.com/nodejs/node/blob/c700cc42da9cf73af9fec2098520a6c0a631d901/lib/internal/validators.js#L21
-var octalReg = /^[0-7]+$/;
-var modeDesc = 'must be a 32-bit unsigned integer or an octal string';
-function isUint32(value) {
-  return value === (value >>> 0);
-}
-// Validator for mode_t (the S_* constants). Valid numbers or octal strings
-// will be masked with 0o777 to be consistent with the behavior in POSIX APIs.
-function validateAndMaskMode(value, def, callback) {
-  if(typeof def === 'function') {
-    callback = def;
-    def = undefined;
-  }
-
-  if (isUint32(value)) {
-    return value & FULL_READ_WRITE_EXEC_PERMISSIONS;
-  }
-
-  if (typeof value === 'number') {
-    if (!Number.isInteger(value)) {
-      callback(new Errors.EINVAL('mode not a valid an integer value', value));
-      return false;
-    } else {
-      // 2 ** 32 === 4294967296
-      callback(new Errors.EINVAL('mode not a valid an integer value', value));
-      return false;
-    }
-  }
-
-  if (typeof value === 'string') {
-    if (!octalReg.test(value)) {
-      callback(new Errors.EINVAL('mode not a valid octal string', value));
-      return false;
-    }
-    var parsed = parseInt(value, 8);
-    return parsed & FULL_READ_WRITE_EXEC_PERMISSIONS;
-  }
-
-  // TODO(BridgeAR): Only return `def` in case `value === null`
-  if (def !== undefined) {
-    return def;
-  }
-
-  callback(new Errors.EINVAL('mode not valid', value));
-  return false;
-}
-
-function chmod_file(context, path, mode, callback) {
-  path = normalize(path);
-
-  function update_mode(error, node) {
-    if (error) {
-      callback(error);
-    } else {
-      Node.setMode(mode, node);
-      update_node_times(context, path, node, { mtime: Date.now() }, callback);
-    }
-  }
-
-  if (typeof mode !== 'number') {
-    callback(new Errors.EINVAL('mode must be number', path));
-  }
-  else {
-    find_node(context, path, update_mode);
-  }
-}
-
-function fchmod_file(context, ofd, mode, callback) {
-  function update_mode(error, node) {
-    if (error) {
-      callback(error);
-    } else {
-      node.mode = mode;
-      update_node_times(context, ofd.path, node, { mtime: Date.now() }, callback);
-    }
-  }
-
-  if (typeof mode !== 'number') {
-    callback(new Errors.EINVAL('mode must be a number'));
-  }
-  else {
-    ofd.getNode(context, update_mode);
-  }
-}
-
-function chown_file(context, path, uid, gid, callback) {
-  path = normalize(path);
-
-  function update_owner(error, node) {
-    if (error) {
-      callback(error);
-    } else {
-      node.uid = uid;
-      node.gid = gid;
-      update_node_times(context, path, node, { mtime: Date.now() }, callback);
-    }
-  }
-
-  find_node(context, path, update_owner);
-}
-
-function fchown_file(context, ofd, uid, gid, callback) {
-  function update_owner(error, node) {
-    if (error) {
-      callback(error);
-    } else {
-      node.uid = uid;
-      node.gid = gid;
-      update_node_times(context, ofd.path, node, { mtime: Date.now() }, callback);
-    }
-  }
-
-  ofd.getNode(context, update_owner);
-}
-
-function getxattr(fs, context, path, name, callback) {
-  if (!pathCheck(path, callback)) return;
-  getxattr_file(context, path, name, callback);
-}
-=======
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
   function check_if_symbolic_link(error, result) {
     if (error) {
       callback(error);
     } else {
       var node = result;
-      if (node.mode == MODE_SYMBOLIC_LINK) {
+      if (node.type === NODE_TYPE_SYMBOLIC_LINK) {
         followedCount++;
         if (followedCount > SYMLOOP_MAX) {
           callback(new Errors.ELOOP(null, path));
@@ -11189,7 +6831,7 @@ function getxattr(fs, context, path, name, callback) {
     data = normalize(data);
     parentPath = dirname(data);
     name = basename(data);
-    if (ROOT_DIRECTORY_NAME == name) {
+    if (ROOT_DIRECTORY_NAME === name) {
       if (_(flags).contains(O_WRITE)) {
         callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));
       } else {
@@ -11209,7 +6851,10 @@ function getxattr(fs, context, path, name, callback) {
   }
 
   function write_file_node() {
-    Node.create({ guid: context.guid, mode: MODE_FILE }, function (error, result) {
+    Node.create({
+      guid: context.guid,
+      type: NODE_TYPE_FILE
+    }, function (error, result) {
       if (error) {
         callback(error);
         return;
@@ -11243,95 +6888,16 @@ function getxattr(fs, context, path, name, callback) {
     if (error) {
       callback(error);
     } else {
-      directoryData[name] = new DirectoryEntry(fileNode.id, MODE_FILE);
+      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_FILE);
       context.putObject(directoryNode.data, directoryData, update_time);
     }
   }
-<<<<<<< HEAD
-}
-
-function chmod(fs, context, path, mode, callback) {
-  if(!pathCheck(path, callback)) return;
-  mode = validateAndMaskMode(mode, 'mode');
-  if(!mode) return;
-
-  chmod_file(context, path, mode, callback);
-}
-
-function fchmod(fs, context, fd, mode, callback) {
-  mode = validateAndMaskMode(mode, 'mode');
-  if(!mode) return;
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  } else {
-    fchmod_file(context, ofd, mode, callback);
-  }
-}
-
-function chown(fs, context, path, uid, gid, callback) {
-  if(!pathCheck(path, callback)) return;
-  if(!isUint32(uid)) {
-    return callback(new Errors.EINVAL('uid must be a valid integer', uid));
-  }
-  if(!isUint32(gid)) {
-    return callback(new Errors.EINVAL('gid must be a valid integer', gid));
-  }
-
-  chown_file(context, path, uid, gid, callback);
-}
-
-function fchown(fs, context, fd, uid, gid, callback) {
-  if(!isUint32(uid)) {
-    return callback(new Errors.EINVAL('uid must be a valid integer', uid));
-  }
-  if(!isUint32(gid)) {
-    return callback(new Errors.EINVAL('gid must be a valid integer', gid));
-  }
-
-  var ofd = fs.openFiles[fd];
-  if(!ofd) {
-    callback(new Errors.EBADF());
-  } else if(!_(ofd.flags).contains(O_WRITE)) {
-    callback(new Errors.EBADF('descriptor does not permit writing'));
-  } else {
-    fchown_file(context, ofd, uid, gid, callback);
-  }
-}
-
-function rename(fs, context, oldpath, newpath, callback) {
-  if(!pathCheck(oldpath, callback)) return;
-  if(!pathCheck(newpath, callback)) return;
-
-  oldpath = normalize(oldpath);
-  newpath = normalize(newpath);
-
-  var oldParentPath = Path.dirname(oldpath);
-  var newParentPath = Path.dirname(oldpath);
-  var oldName = Path.basename(oldpath);
-  var newName = Path.basename(newpath);
-  var oldParentDirectory, oldParentData;
-  var newParentDirectory, newParentData;
-  var ctime = Date.now();
-  var fileNode;
-
-  function update_times(error, result) {
-    if(error) {
-      callback(error);
-    } else {
-      fileNode = result;
-      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);
-=======
 
   function handle_update_result(error) {
     if (error) {
       callback(error);
     } else {
       callback(null, fileNode);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     }
   }
 }
@@ -11443,35 +7009,13 @@ function write_data(context, ofd, buffer, offset, length, position, callback) {
   function read_file_data(error, result) {
     if (error) {
       callback(error);
-<<<<<<< HEAD
-    } else if(node.type === NODE_TYPE_DIRECTORY) {
-      find_node(context, oldParentPath, read_parent_directory_data);
-=======
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     } else {
       fileNode = result;
       context.getBuffer(fileNode.data, update_file_data);
     }
   }
 
-<<<<<<< HEAD
-  find_node(context, oldpath, check_node_type);
-}
-
-function symlink(fs, context, srcpath, dstpath, type, callback) {
-  // NOTE: we support passing the `type` arg, but ignore it.
-  callback = arguments[arguments.length - 1];
-
-  // Special Case: allow srcpath to be relative, which we normally don't permit.
-  // If the srcpath is relative, we assume it's relative to the dirpath of 
-  // dstpath.
-  if(!pathCheck(srcpath, true, callback)) return;
-  if(!pathCheck(dstpath, callback)) return;
-
-  make_symbolic_link(context, srcpath, dstpath, callback);
-=======
   context.getObject(ofd.id, read_file_data);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 }
 
 function read_data(context, ofd, buffer, offset, length, position, callback) {
@@ -11499,68 +7043,22 @@ function read_data(context, ofd, buffer, offset, length, position, callback) {
   function read_file_data(error, result) {
     if (error) {
       callback(error);
-    } else if (result.mode === 'DIRECTORY') {
+    } else if (result.type === NODE_TYPE_DIRECTORY) {
       callback(new Errors.EISDIR('the named file is a directory', ofd.path));
     } else {
-<<<<<<< HEAD
-      var stats = new Stats(path, result, fs.name);
-      callback(null, stats);
-=======
       fileNode = result;
       context.getBuffer(fileNode.data, handle_file_data);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     }
   }
 
   context.getObject(ofd.id, read_file_data);
 }
 
-<<<<<<< HEAD
-module.exports = {
-  ensureRootDirectory: ensure_root_directory,
-  open: open,
-  chmod: chmod,
-  fchmod: fchmod,
-  chown: chown,
-  fchown: fchown,
-  close: close,
-  mknod: mknod,
-  mkdir: mkdir,
-  rmdir: rmdir,
-  unlink: unlink,
-  stat: stat,
-  fstat: fstat,
-  link: link,
-  read: read,
-  readFile: readFile,
-  write: write,
-  writeFile: writeFile,
-  appendFile: appendFile,
-  exists: exists,
-  getxattr: getxattr,
-  fgetxattr: fgetxattr,
-  setxattr: setxattr,
-  fsetxattr: fsetxattr,
-  removexattr: removexattr,
-  fremovexattr: fremovexattr,
-  lseek: lseek,
-  readdir: readdir,
-  utimes: utimes,
-  futimes: futimes,
-  rename: rename,
-  symlink: symlink,
-  readlink: readlink,
-  lstat: lstat,
-  truncate: truncate,
-  ftruncate: ftruncate
-};
-=======
 function stat_file(context, path, callback) {
   path = normalize(path);
   var name = basename(path);
   find_node(context, path, callback);
 }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
 function fstat_file(context, ofd, callback) {
   ofd.getNode(context, callback);
@@ -11574,7 +7072,7 @@ function lstat_file(context, path, callback) {
   var directoryNode;
   var directoryData;
 
-  if (ROOT_DIRECTORY_NAME == name) {
+  if (ROOT_DIRECTORY_NAME === name) {
     find_node(context, path, callback);
   } else {
     find_node(context, parentPath, read_directory_data);
@@ -11603,82 +7101,28 @@ function lstat_file(context, path, callback) {
   }
 }
 
-<<<<<<< HEAD
-/**
- * FileSystem
- *
- * A FileSystem takes an `options` object, which can specify a number of,
- * options.  All options are optional, and include:
- *
- * name: the name of the file system, defaults to "local"
- *
- * flags: one or more flags to use when creating/opening the file system.
- *        For example: "FORMAT" will cause the file system to be formatted.
- *        No explicit flags are set by default.
- *
- * provider: an explicit storage provider to use for the file
- *           system's database context provider.  A number of context
- *           providers are included (see /src/providers), and users
- *           can write one of their own and pass it in to be used.
- *           By default an IndexedDB provider is used.
- *
- * guid: a function for generating unique IDs for nodes in the filesystem.
- *       Use this to override the built-in UUID generation. (Used mainly for tests).
- *
- * callback: a callback function to be executed when the file system becomes
- *           ready for use. Depending on the context provider used, this might
- *           be right away, or could take some time. The callback should expect
- *           an `error` argument, which will be null if everything worked.  Also
- *           users should check the file system's `readyState` and `error`
- *           properties to make sure it is usable.
- */
-function FileSystem(options, callback) {
-  options = options || {};
-  callback = callback || defaultCallback;
-
-  var flags = options.flags;
-  var guid = options.guid ? options.guid : defaultGuidFn;
-  var provider = options.provider || new providers.Default(options.name || FILE_SYSTEM_NAME);
-  // If we're given a provider, match its name unless we get an explicit name
-  var name = options.name || provider.name;
-  var forceFormatting = _(flags).contains(FS_FORMAT);
-
-  var fs = this;
-  fs.readyState = FS_PENDING;
-  fs.name = name;
-  fs.error = null;
-
-  fs.stdin = STDIN;
-  fs.stdout = STDOUT;
-  fs.stderr = STDERR;
-
-  // Expose Node's fs.constants to users
-  fs.constants = Constants.fsConstants;
-
-  // Expose Shell constructor
-  this.Shell = Shell.bind(undefined, this);
-=======
 function link_node(context, oldpath, newpath, callback) {
   oldpath = normalize(oldpath);
   var oldname = basename(oldpath);
   var oldParentPath = dirname(oldpath);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
   newpath = normalize(newpath);
   var newname = basename(newpath);
   var newParentPath = dirname(newpath);
+  var ctime = Date.now();
 
   var oldDirectoryNode;
   var oldDirectoryData;
   var newDirectoryNode;
   var newDirectoryData;
+  var fileNodeID;
   var fileNode;
 
   function update_time(error) {
     if (error) {
       callback(error);
     } else {
-      update_node_times(context, newpath, fileNode, { ctime: Date.now() }, callback);
+      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);
     }
   }
 
@@ -11692,11 +7136,11 @@ function link_node(context, oldpath, newpath, callback) {
     }
   }
 
-  function read_directory_entry(error, result) {
+  function read_file_node(error, result) {
     if (error) {
       callback(error);
     } else {
-      context.getObject(newDirectoryData[newname].id, update_file_node);
+      context.getObject(fileNodeID, update_file_node);
     }
   }
 
@@ -11709,7 +7153,8 @@ function link_node(context, oldpath, newpath, callback) {
         callback(new Errors.EEXIST('newpath resolves to an existing file', newname));
       } else {
         newDirectoryData[newname] = oldDirectoryData[oldname];
-        context.putObject(newDirectoryNode.data, newDirectoryData, read_directory_entry);
+        fileNodeID = newDirectoryData[newname].id;
+        context.putObject(newDirectoryNode.data, newDirectoryData, read_file_node);
       }
     }
   }
@@ -11730,7 +7175,7 @@ function link_node(context, oldpath, newpath, callback) {
       oldDirectoryData = result;
       if (!_(oldDirectoryData).has(oldname)) {
         callback(new Errors.ENOENT('a component of either path prefix does not exist', oldname));
-      } else if (oldDirectoryData[oldname].type === 'DIRECTORY') {
+      } else if (oldDirectoryData[oldname].type === NODE_TYPE_DIRECTORY) {
         callback(new Errors.EPERM('oldpath refers to a directory'));
       } else {
         find_node(context, newParentPath, read_new_directory_data);
@@ -11738,52 +7183,6 @@ function link_node(context, oldpath, newpath, callback) {
     }
   }
 
-<<<<<<< HEAD
-/**
- * Public API for FileSystem
- */
-[
-  'open',
-  'chmod',
-  'fchmod',
-  'chown',
-  'fchown',
-  'close',
-  'mknod',
-  'mkdir',
-  'rmdir',
-  'stat',
-  'fstat',
-  'link',
-  'unlink',
-  'read',
-  'readFile',
-  'write',
-  'writeFile',
-  'appendFile',
-  'exists',
-  'lseek',
-  'readdir',
-  'rename',
-  'readlink',
-  'symlink',
-  'lstat',
-  'truncate',
-  'ftruncate',
-  'utimes',
-  'futimes',
-  'setxattr',
-  'getxattr',
-  'fsetxattr',
-  'fgetxattr',
-  'removexattr',
-  'fremovexattr'
-].forEach(function(methodName) {
-  FileSystem.prototype[methodName] = function() {
-    var fs = this;
-    var args = Array.prototype.slice.call(arguments, 0);
-    var lastArgIndex = args.length - 1;
-=======
   function read_old_directory_data(error, result) {
     if (error) {
       callback(error);
@@ -11792,7 +7191,6 @@ function link_node(context, oldpath, newpath, callback) {
       context.getObject(oldDirectoryNode.data, check_if_old_file_exists);
     }
   }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
   find_node(context, oldParentPath, read_old_directory_data);
 }
@@ -11845,7 +7243,7 @@ function unlink_node(context, path, callback) {
   function check_if_node_is_directory(error, result) {
     if (error) {
       callback(error);
-    } else if (result.mode === 'DIRECTORY') {
+    } else if (result.type === NODE_TYPE_DIRECTORY) {
       callback(new Errors.EPERM('unlink not permitted on directories', name));
     } else {
       update_file_node(null, result);
@@ -11884,51 +7282,6 @@ function read_directory(context, path, callback) {
   var directoryNode;
   var directoryData;
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-},{"./buffer.js":14,"./errors.js":18,"./filesystem/interface.js":20,"./path.js":25,"./shell/shell.js":32}],23:[function(require,module,exports){
-var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;
-var NODE_TYPE_DIRECTORY = require('./constants.js').NODE_TYPE_DIRECTORY;
-var NODE_TYPE_SYMBOLIC_LINK = require('./constants.js').NODE_TYPE_SYMBOLIC_LINK;
-var NODE_TYPE_META = require('./constants.js').NODE_TYPE_META;
-
-var ROOT_DIRECTORY_NAME = require('./constants.js').ROOT_DIRECTORY_NAME;
-
-var S_IFREG = require('./constants.js').S_IFREG;
-var S_IFDIR = require('./constants.js').S_IFDIR;
-var S_IFLNK = require('./constants.js').S_IFLNK;
-
-var DEFAULT_FILE_PERMISSIONS = require('./constants.js').DEFAULT_FILE_PERMISSIONS;
-var DEFAULT_DIR_PERMISSIONS = require('./constants.js').DEFAULT_DIR_PERMISSIONS;
-
-function getMode(type, mode) {
-  switch(type) {
-    case NODE_TYPE_DIRECTORY:
-      return (mode || DEFAULT_DIR_PERMISSIONS) | S_IFDIR;
-    case NODE_TYPE_SYMBOLIC_LINK:
-      return (mode || DEFAULT_FILE_PERMISSIONS) | S_IFLNK;
-    /* jshint -W086 */
-    case NODE_TYPE_FILE:
-      // falls through
-    default:
-      return (mode || DEFAULT_FILE_PERMISSIONS) | S_IFREG;
-  }
-}
-=======
-<<<<<<< HEAD
-},{"../../lib/async.js":1,"../constants.js":15}],29:[function(require,module,exports){
-(function (global){
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-var FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;
-var WSQL_VERSION = require('../constants.js').WSQL_VERSION;
-var WSQL_SIZE = require('../constants.js').WSQL_SIZE;
-var WSQL_DESC = require('../constants.js').WSQL_DESC;
-var Errors = require('../errors.js');
-var FilerBuffer = require('../buffer.js');
-var base64ArrayBuffer = require('base64-arraybuffer');
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
   function handle_directory_data(error, result) {
     if (error) {
       callback(error);
@@ -11938,16 +7291,11 @@ var base64ArrayBuffer = require('base64-arraybuffer');
       callback(null, files);
     }
   }
-<<<<<<< HEAD
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 
   function read_directory_data(error, result) {
     if (error) {
       callback(error);
-    } else if (result.mode !== MODE_DIRECTORY) {
+    } else if (result.type !== NODE_TYPE_DIRECTORY) {
       callback(new Errors.ENOTDIR(null, path));
     } else {
       directoryNode = result;
@@ -11955,26 +7303,7 @@ var base64ArrayBuffer = require('base64-arraybuffer');
     }
   }
 
-<<<<<<< HEAD
-  this.id = options.id;
-  this.type = options.type || NODE_TYPE_FILE;  // node type (file, directory, etc)
-  this.size = options.size || 0; // size (bytes for files, entries for directories)
-  this.atime = options.atime || now; // access time (will mirror ctime after creation)
-  this.ctime = options.ctime || now; // creation/change time
-  this.mtime = options.mtime || now; // modified time
-  this.flags = options.flags || []; // file flags
-  this.xattrs = options.xattrs || {}; // extended attributes
-  this.nlinks = options.nlinks || 0; // links count
-  this.data = options.data; // id for data object
-  this.version = options.version || 1;
-
-  // permissions and flags
-  this.mode = options.mode || (getMode(this.type));
-  this.uid = options.uid || 0x0; // owner name
-  this.gid = options.gid || 0x0; // group name
-=======
   find_node(context, path, read_directory_data);
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 }
 
 function make_symbolic_link(context, srcpath, dstpath, callback) {
@@ -11986,7 +7315,7 @@ function make_symbolic_link(context, srcpath, dstpath, callback) {
   var directoryData;
   var fileNode;
 
-  if (ROOT_DIRECTORY_NAME == name) {
+  if (ROOT_DIRECTORY_NAME === name) {
     callback(new Errors.EEXIST(null, name));
   } else {
     find_node(context, parentPath, read_directory_data);
@@ -12015,46 +7344,30 @@ function make_symbolic_link(context, srcpath, dstpath, callback) {
   }
 
   function write_file_node() {
-    Node.create({ guid: context.guid, mode: MODE_SYMBOLIC_LINK }, function (error, result) {
+    Node.create({
+      guid: context.guid,
+      type: NODE_TYPE_SYMBOLIC_LINK
+    }, function (error, result) {
       if (error) {
         callback(error);
         return;
       }
       fileNode = result;
       fileNode.nlinks += 1;
+
+      // If the srcpath isn't absolute, resolve it relative to the dstpath
+      // but store both versions, since we'll use the relative one in readlink().
+      if (!isAbsolutePath(srcpath)) {
+        fileNode.symlink_relpath = srcpath;
+        srcpath = Path.resolve(parentPath, srcpath);
+      }
+
       fileNode.size = srcpath.length;
       fileNode.data = srcpath;
+
       context.putObject(fileNode.id, fileNode, update_directory_data);
     });
-<<<<<<< HEAD
-  });
-};
-
-// Update the node's mode (permissions), taking file type bits into account.
-Node.setMode = function(mode, node) {
-  node.mode = getMode(node.type, mode);
-};
-
-module.exports = Node;
-
-},{"./constants.js":15}],24:[function(require,module,exports){
-var Errors = require('./errors.js');
-
-function OpenFileDescription(path, id, flags, position) {
-  this.path = path;
-  this.id = id;
-  this.flags = flags;
-  this.position = position;
-}
-
-// Tries to find the node associated with an ofd's `id`.
-// If not found, an error is returned on the callback.
-OpenFileDescription.prototype.getNode = function(context, callback) {
-  var id = this.id;
-  var path = this.path;
-=======
   }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
   function update_time(error) {
     if (error) {
@@ -12069,7 +7382,7 @@ OpenFileDescription.prototype.getNode = function(context, callback) {
     if (error) {
       callback(error);
     } else {
-      directoryData[name] = new DirectoryEntry(fileNode.id, MODE_SYMBOLIC_LINK);
+      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_SYMBOLIC_LINK);
       context.putObject(directoryNode.data, directoryData, update_time);
     }
   }
@@ -12107,14 +7420,17 @@ function read_link(context, path, callback) {
     }
   }
 
-  function check_if_symbolic(error, result) {
+  function check_if_symbolic(error, fileNode) {
     if (error) {
       callback(error);
     } else {
-      if (result.mode != MODE_SYMBOLIC_LINK) {
+      if (fileNode.type !== NODE_TYPE_SYMBOLIC_LINK) {
         callback(new Errors.EINVAL('path not a symbolic link', path));
       } else {
-        callback(null, result.data);
+        // If we were originally given a relative path, return that now vs. the
+        // absolute path we've generated and use elsewhere internally.
+        var target = fileNode.symlink_relpath ? fileNode.symlink_relpath : fileNode.data;
+        callback(null, target);
       }
     }
   }
@@ -12128,7 +7444,7 @@ function truncate_file(context, path, length, callback) {
   function read_file_data(error, node) {
     if (error) {
       callback(error);
-    } else if (node.mode == MODE_DIRECTORY) {
+    } else if (node.type === NODE_TYPE_DIRECTORY) {
       callback(new Errors.EISDIR(null, path));
     } else {
       fileNode = node;
@@ -12184,7 +7500,7 @@ function ftruncate_file(context, ofd, length, callback) {
   function read_file_data(error, node) {
     if (error) {
       callback(error);
-    } else if (node.mode == MODE_DIRECTORY) {
+    } else if (node.type === NODE_TYPE_DIRECTORY) {
       callback(new Errors.EISDIR());
     } else {
       fileNode = node;
@@ -12247,7 +7563,7 @@ function utimes_file(context, path, atime, mtime, callback) {
     }
   }
 
-  if (typeof atime != 'number' || typeof mtime != 'number') {
+  if (typeof atime !== 'number' || typeof mtime !== 'number') {
     callback(new Errors.EINVAL('atime and mtime must be number', path));
   } else if (atime < 0 || mtime < 0) {
     callback(new Errors.EINVAL('atime and mtime must be positive integers', path));
@@ -12266,7 +7582,7 @@ function futimes_file(context, ofd, atime, mtime, callback) {
     }
   }
 
-  if (typeof atime != 'number' || typeof mtime != 'number') {
+  if (typeof atime !== 'number' || typeof mtime !== 'number') {
     callback(new Errors.EINVAL('atime and mtime must be a number'));
   } else if (atime < 0 || mtime < 0) {
     callback(new Errors.EINVAL('atime and mtime must be positive integers'));
@@ -12285,7 +7601,7 @@ function setxattr_file(context, path, name, value, flag, callback) {
     set_extended_attribute(context, path, node, name, value, flag, callback);
   }
 
-  if (typeof name != 'string') {
+  if (typeof name !== 'string') {
     callback(new Errors.EINVAL('attribute name must be a string', path));
   } else if (!name) {
     callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
@@ -12332,7 +7648,7 @@ function getxattr_file(context, path, name, callback) {
     }
   }
 
-  if (typeof name != 'string') {
+  if (typeof name !== 'string') {
     callback(new Errors.EINVAL('attribute name must be a string', path));
   } else if (!name) {
     callback(new Errors.EINVAL('attribute name cannot be an empty string', path));
@@ -12357,7 +7673,7 @@ function fgetxattr_file(context, ofd, name, callback) {
     }
   }
 
-  if (typeof name != 'string') {
+  if (typeof name !== 'string') {
     callback(new Errors.EINVAL());
   } else if (!name) {
     callback(new Errors.EINVAL('attribute name cannot be an empty string'));
@@ -12416,34 +7732,17 @@ function fremovexattr_file(context, ofd, name, callback) {
       }
     }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-},{"./indexeddb.js":27,"./memory.js":28,"./websql.js":29}],27:[function(require,module,exports){
-(function (global){
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-var FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;
-var IDB_RW = require('../constants.js').IDB_RW;
-var IDB_RO = require('../constants.js').IDB_RO;
-var Errors = require('../errors.js');
-var FilerBuffer = require('../buffer.js');
-=======
-    if (error) {
-      callback(error);
-    } else if (!node.xattrs.hasOwnProperty(name)) {
-=======
     var xattrs = node.xattrs;
 
     if (!xattrs.hasOwnProperty(name)) {
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
       callback(new Errors.ENOATTR());
     } else {
       delete xattrs[name];
       context.putObject(node.id, node, update_time);
     }
   }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
-  if (typeof name != 'string') {
+  if (typeof name !== 'string') {
     callback(new Errors.EINVAL('attribute name must be a string'));
   } else if (!name) {
     callback(new Errors.EINVAL('attribute name cannot be an empty string'));
@@ -12470,14 +7769,19 @@ function validate_file_options(options, enc, fileMode) {
   return options;
 }
 
-function pathCheck(path, callback) {
+function pathCheck(path, allowRelative, callback) {
   var err;
 
+  if (typeof allowRelative === 'function') {
+    callback = allowRelative;
+    allowRelative = false;
+  }
+
   if (!path) {
     err = new Errors.EINVAL('Path must be a string', path);
   } else if (isNullPath(path)) {
     err = new Errors.EINVAL('Path must be a string without null bytes.', path);
-  } else if (!isAbsolutePath(path)) {
+  } else if (!allowRelative && !isAbsolutePath(path)) {
     err = new Errors.EINVAL('Path must be absolute.', path);
   }
 
@@ -12489,8 +7793,22 @@ function pathCheck(path, callback) {
 }
 
 function open(fs, context, path, flags, mode, callback) {
-  // NOTE: we support the same signature as node with a `mode` arg,
-  // but ignore it.
+  /**
+   * NOTE: we support the same signature as node with a `mode` arg,
+   * but ignore it. We need to add it.  Here is what node.js does:
+   * function open(path, flags, mode, callback) {
+   *    path = getPathFromURL(path);
+   *  validatePath(path);
+   *  const flagsNumber = stringToFlags(flags);
+   *  if (arguments.length < 4) {
+   *    callback = makeCallback(mode);
+   *    mode = 0o666;
+   *  } else {
+   *    mode = validateAndMaskMode(mode, 'mode', 0o666);
+   *    callback = makeCallback(callback);
+   * }
+  */
+
   callback = arguments[arguments.length - 1];
   if (!pathCheck(path, callback)) return;
 
@@ -12514,16 +7832,6 @@ function open(fs, context, path, flags, mode, callback) {
   if (!flags) {
     callback(new Errors.EINVAL('flags is not valid'), path);
   }
-<<<<<<< HEAD
-};
-IndexedDBContext.prototype.putObject = function(key, value, callback) {
-  this._put(key, value, callback);
-};
-IndexedDBContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {
-  var buf = uint8BackedBuffer.buffer;
-  this._put(key, buf, callback);
-};
-=======
 
   open_file(context, path, flags, check_result);
 }
@@ -12536,16 +7844,21 @@ function close(fs, context, fd, callback) {
     callback(null);
   }
 }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
-function mknod(fs, context, path, mode, callback) {
+function mknod(fs, context, path, type, callback) {
   if (!pathCheck(path, callback)) return;
-  make_node(context, path, mode, callback);
+  make_node(context, path, type, callback);
 }
 
 function mkdir(fs, context, path, mode, callback) {
-  // NOTE: we support passing a mode arg, but we ignore it internally for now.
-  callback = arguments[arguments.length - 1];
+  if (arguments.length < 5) {
+    callback = mode;
+    mode = FULL_READ_WRITE_EXEC_PERMISSIONS;
+  } else {
+    mode = validateAndMaskMode(mode, FULL_READ_WRITE_EXEC_PERMISSIONS, callback);
+    if (!mode) return;
+  }
+
   if (!pathCheck(path, callback)) return;
   make_directory(context, path, callback);
 }
@@ -12562,7 +7875,7 @@ function stat(fs, context, path, callback) {
     if (error) {
       callback(error);
     } else {
-      var stats = new Stats(result, fs.name);
+      var stats = new Stats(path, result, fs.name);
       callback(null, stats);
     }
   }
@@ -12575,7 +7888,7 @@ function fstat(fs, context, fd, callback) {
     if (error) {
       callback(error);
     } else {
-      var stats = new Stats(result, fs.name);
+      var stats = new Stats(ofd.path, result, fs.name);
       callback(null, stats);
     }
   }
@@ -12648,21 +7961,12 @@ function readFile(fs, context, path, options, callback) {
         return callback(err);
       }
 
-      var stats = new Stats(fstatResult, fs.name);
+      var stats = new Stats(ofd.path, fstatResult, fs.name);
 
-<<<<<<< HEAD
-}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"../buffer.js":14,"../constants.js":15,"../errors.js":18}],28:[function(require,module,exports){
-var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;
-// NOTE: prefer setImmediate to nextTick for proper recursion yielding.
-// see https://github.com/js-platform/filer/pull/24
-var asyncCallback = require('../../lib/async.js').setImmediate;
-=======
       if (stats.isDirectory()) {
         cleanup();
         return callback(new Errors.EISDIR('illegal operation on directory', path));
       }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
       var size = stats.size;
       var buffer = new Buffer(size);
@@ -12785,6 +8089,119 @@ function exists(fs, context, path, callback) {
   stat(fs, context, path, cb);
 }
 
+// Based on https://github.com/nodejs/node/blob/c700cc42da9cf73af9fec2098520a6c0a631d901/lib/internal/validators.js#L21
+var octalReg = /^[0-7]+$/;
+var modeDesc = 'must be a 32-bit unsigned integer or an octal string';
+function isUint32(value) {
+  return value === value >>> 0;
+}
+// Validator for mode_t (the S_* constants). Valid numbers or octal strings
+// will be masked with 0o777 to be consistent with the behavior in POSIX APIs.
+function validateAndMaskMode(value, def, callback) {
+  if (typeof def === 'function') {
+    callback = def;
+    def = undefined;
+  }
+
+  if (isUint32(value)) {
+    return value & FULL_READ_WRITE_EXEC_PERMISSIONS;
+  }
+
+  if (typeof value === 'number') {
+    if (!Number.isInteger(value)) {
+      callback(new Errors.EINVAL('mode not a valid an integer value', value));
+      return false;
+    } else {
+      // 2 ** 32 === 4294967296
+      callback(new Errors.EINVAL('mode not a valid an integer value', value));
+      return false;
+    }
+  }
+
+  if (typeof value === 'string') {
+    if (!octalReg.test(value)) {
+      callback(new Errors.EINVAL('mode not a valid octal string', value));
+      return false;
+    }
+    var parsed = parseInt(value, 8);
+    return parsed & FULL_READ_WRITE_EXEC_PERMISSIONS;
+  }
+
+  // TODO(BridgeAR): Only return `def` in case `value === null`
+  if (def !== undefined) {
+    return def;
+  }
+
+  callback(new Errors.EINVAL('mode not valid', value));
+  return false;
+}
+
+function chmod_file(context, path, mode, callback) {
+  path = normalize(path);
+
+  function update_mode(error, node) {
+    if (error) {
+      callback(error);
+    } else {
+      Node.setMode(mode, node);
+      update_node_times(context, path, node, { mtime: Date.now() }, callback);
+    }
+  }
+
+  if (typeof mode !== 'number') {
+    callback(new Errors.EINVAL('mode must be number', path));
+  } else {
+    find_node(context, path, update_mode);
+  }
+}
+
+function fchmod_file(context, ofd, mode, callback) {
+  function update_mode(error, node) {
+    if (error) {
+      callback(error);
+    } else {
+      node.mode = mode;
+      update_node_times(context, ofd.path, node, { mtime: Date.now() }, callback);
+    }
+  }
+
+  if (typeof mode !== 'number') {
+    callback(new Errors.EINVAL('mode must be a number'));
+  } else {
+    ofd.getNode(context, update_mode);
+  }
+}
+
+function chown_file(context, path, uid, gid, callback) {
+  path = normalize(path);
+
+  function update_owner(error, node) {
+    if (error) {
+      callback(error);
+    } else {
+      node.uid = uid;
+      node.gid = gid;
+      update_node_times(context, path, node, { mtime: Date.now() }, callback);
+    }
+  }
+
+  find_node(context, path, update_owner);
+}
+
+function fchown_file(context, ofd, uid, gid, callback) {
+  function update_owner(error, node) {
+    if (error) {
+      callback(error);
+    } else {
+      node.uid = uid;
+      node.gid = gid;
+      update_node_times(context, ofd.path, node, { mtime: Date.now() }, callback);
+    }
+  }
+
+  ofd.getNode(context, update_owner);
+}
+
 function getxattr(fs, context, path, name, callback) {
   if (!pathCheck(path, callback)) return;
   getxattr_file(context, path, name, callback);
@@ -12911,6 +8328,58 @@ function futimes(fs, context, fd, atime, mtime, callback) {
   }
 }
 
+function chmod(fs, context, path, mode, callback) {
+  if (!pathCheck(path, callback)) return;
+  mode = validateAndMaskMode(mode, 'mode');
+  if (!mode) return;
+
+  chmod_file(context, path, mode, callback);
+}
+
+function fchmod(fs, context, fd, mode, callback) {
+  mode = validateAndMaskMode(mode, 'mode');
+  if (!mode) return;
+
+  var ofd = fs.openFiles[fd];
+  if (!ofd) {
+    callback(new Errors.EBADF());
+  } else if (!_(ofd.flags).contains(O_WRITE)) {
+    callback(new Errors.EBADF('descriptor does not permit writing'));
+  } else {
+    fchmod_file(context, ofd, mode, callback);
+  }
+}
+
+function chown(fs, context, path, uid, gid, callback) {
+  if (!pathCheck(path, callback)) return;
+  if (!isUint32(uid)) {
+    return callback(new Errors.EINVAL('uid must be a valid integer', uid));
+  }
+  if (!isUint32(gid)) {
+    return callback(new Errors.EINVAL('gid must be a valid integer', gid));
+  }
+
+  chown_file(context, path, uid, gid, callback);
+}
+
+function fchown(fs, context, fd, uid, gid, callback) {
+  if (!isUint32(uid)) {
+    return callback(new Errors.EINVAL('uid must be a valid integer', uid));
+  }
+  if (!isUint32(gid)) {
+    return callback(new Errors.EINVAL('gid must be a valid integer', gid));
+  }
+
+  var ofd = fs.openFiles[fd];
+  if (!ofd) {
+    callback(new Errors.EBADF());
+  } else if (!_(ofd.flags).contains(O_WRITE)) {
+    callback(new Errors.EBADF('descriptor does not permit writing'));
+  } else {
+    fchown_file(context, ofd, uid, gid, callback);
+  }
+}
+
 function rename(fs, context, oldpath, newpath, callback) {
   if (!pathCheck(oldpath, callback)) return;
   if (!pathCheck(newpath, callback)) return;
@@ -12924,12 +8393,15 @@ function rename(fs, context, oldpath, newpath, callback) {
   var newName = Path.basename(newpath);
   var oldParentDirectory, oldParentData;
   var newParentDirectory, newParentData;
+  var ctime = Date.now();
+  var fileNode;
 
-  function update_times(error, newNode) {
+  function update_times(error, result) {
     if (error) {
       callback(error);
     } else {
-      update_node_times(context, newpath, newNode, { ctime: Date.now() }, callback);
+      fileNode = result;
+      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);
     }
   }
 
@@ -13013,7 +8485,7 @@ function rename(fs, context, oldpath, newpath, callback) {
   function check_node_type(error, node) {
     if (error) {
       callback(error);
-    } else if (node.mode === 'DIRECTORY') {
+    } else if (node.type === NODE_TYPE_DIRECTORY) {
       find_node(context, oldParentPath, read_parent_directory_data);
     } else {
       link_node(context, oldpath, newpath, unlink_old_file);
@@ -13026,8 +8498,13 @@ function rename(fs, context, oldpath, newpath, callback) {
 function symlink(fs, context, srcpath, dstpath, type, callback) {
   // NOTE: we support passing the `type` arg, but ignore it.
   callback = arguments[arguments.length - 1];
-  if (!pathCheck(srcpath, callback)) return;
+
+  // Special Case: allow srcpath to be relative, which we normally don't permit.
+  // If the srcpath is relative, we assume it's relative to the dirpath of 
+  // dstpath.
+  if (!pathCheck(srcpath, true, callback)) return;
   if (!pathCheck(dstpath, callback)) return;
+
   make_symbolic_link(context, srcpath, dstpath, callback);
 }
 
@@ -13043,7 +8520,7 @@ function lstat(fs, context, path, callback) {
     if (error) {
       callback(error);
     } else {
-      var stats = new Stats(result, fs.name);
+      var stats = new Stats(path, result, fs.name);
       callback(null, stats);
     }
   }
@@ -13078,6 +8555,10 @@ function ftruncate(fs, context, fd, length, callback) {
 module.exports = {
   ensureRootDirectory: ensure_root_directory,
   open: open,
+  chmod: chmod,
+  fchmod: fchmod,
+  chown: chown,
+  fchown: fchown,
   close: close,
   mknod: mknod,
   mkdir: mkdir,
@@ -13109,7 +8590,7 @@ module.exports = {
   truncate: truncate,
   ftruncate: ftruncate
 };
-},{"../../lib/nodash.js":14,"../path.js":4,"../constants.js":16,"../encoding.js":20,"../errors.js":5,"../directory-entry.js":48,"../open-file-description.js":49,"../super-node.js":50,"../node.js":51,"../stats.js":52,"../buffer.js":3}],6:[function(require,module,exports) {
+},{"../../lib/nodash.js":"96cB","../path.js":"UzoP","../constants.js":"iJA9","../encoding.js":"03yF","../errors.js":"p8GN","../directory-entry.js":"ZECt","../open-file-description.js":"XWaV","../super-node.js":"33JE","../node.js":"KKNo","../stats.js":"6dsC","../buffer.js":"xfwq"}],"GMi4":[function(require,module,exports) {
 var _ = require('../../lib/nodash.js');
 
 var isNullPath = require('../path.js').isNull;
@@ -13197,33 +8678,6 @@ function FileSystem(options, callback) {
   var name = options.name || provider.name;
   var forceFormatting = _(flags).contains(FS_FORMAT);
 
-<<<<<<< HEAD
-      function getDirEntry(name, callback) {
-        name = Path.join(pathname, name);
-        fs.stat(name, function(error, stats) {
-          if(error) {
-            callback(error);
-            return;
-          }
-          var entry = stats;
-
-          if(options.recursive && stats.type === 'DIRECTORY') {
-            list(Path.join(pathname, entry.name), function(error, items) {
-              if(error) {
-                callback(error);
-                return;
-              }
-              entry.contents = items;
-              result.push(entry);
-              callback();
-            });
-          } else {
-            result.push(entry);
-            callback();
-          }
-        });
-      }
-=======
   var fs = this;
   fs.readyState = FS_PENDING;
   fs.name = name;
@@ -13232,7 +8686,9 @@ function FileSystem(options, callback) {
   fs.stdin = STDIN;
   fs.stdout = STDOUT;
   fs.stderr = STDERR;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
+
+  // Expose Node's fs.constants to users
+  fs.constants = Constants.fsConstants;
 
   // Expose Shell constructor
   this.Shell = Shell.bind(undefined, this);
@@ -13379,162 +8835,6 @@ function FileSystem(options, callback) {
       callback(error, fs);
     }
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-/**
- * Recursively walk a directory tree, reporting back all paths
- * that were found along the way. The `path` must be a dir.
- * Valid options include a `regex` for pattern matching paths
- * and an `exec` function of the form `function(path, next)` where
- * `path` is the current path that was found (dir paths have an '/'
- * appended) and `next` is a callback to call when done processing
- * the current path, passing any error object back as the first argument.
- * `find` returns a flat array of absolute paths for all matching/found
- * paths as the final argument to the callback.
- */
- Shell.prototype.find = function(path, options, callback) {
-  var sh = this;
-  var fs = sh.fs;
-  if(typeof options === 'function') {
-    callback = options;
-    options = {};
-  }
-  options = options || {};
-  callback = callback || function(){};
-
-  var exec = options.exec || function(path, next) { next(); };
-  var found = [];
-
-  if(!path) {
-    callback(new Errors.EINVAL('Missing path argument'));
-    return;
-  }
-
-  function processPath(path, callback) {
-    exec(path, function(err) {
-      if(err) {
-        callback(err);
-        return;
-      }
-
-      found.push(path);
-      callback();
-    });
-  }
-
-  function maybeProcessPath(path, callback) {
-    // Test the path against the user's regex, name, path primaries (if any)
-    // and remove any trailing slashes added previously.
-    var rawPath = Path.removeTrailing(path);
-
-    // Check entire path against provided regex, if any
-    if(options.regex && !options.regex.test(rawPath)) {
-      callback();
-      return;
-    }
-
-    // Check basename for matches against name primary, if any
-    if(options.name && !minimatch(Path.basename(rawPath), options.name)) {
-      callback();
-      return;
-    }
-
-    // Check dirname for matches against path primary, if any
-    if(options.path && !minimatch(Path.dirname(rawPath), options.path)) {
-      callback();
-      return;
-    }
-
-    processPath(path, callback);
-  }
-
-  function walk(path, callback) {
-    path = Path.resolve(sh.pwd(), path);
-
-    // The path is either a file or dir, and instead of doing
-    // a stat() to determine it first, we just try to readdir()
-    // and it will either work or not, and we handle the non-dir error.
-    fs.readdir(path, function(err, entries) {
-      if(err) {
-        if(err.code === 'ENOTDIR' /* file case, ignore error */) {
-          maybeProcessPath(path, callback);
-        } else {
-          callback(err);
-        }
-        return;
-      }
-
-      // Path is really a dir, add a trailing / and report it found
-      maybeProcessPath(Path.addTrailing(path), function(err) {
-        if(err) {
-          callback(err);
-          return;
-        }
-
-        entries = entries.map(function(entry) {
-          return Path.join(path, entry);
-        });
-
-        async.eachSeries(entries, walk, function(err) {
-          callback(err, found);
-        });
-      });
-    });
-  }
-
-  // Make sure we are starting with a dir path
-  fs.stat(path, function(err, stats) {
-    if(err) {
-      callback(err);
-      return;
-    }
-    if(!stats.isDirectory()) {
-      callback(new Errors.ENOTDIR(null, path));
-      return;
-    }
-
-    walk(path, callback);
-  });
-};
-
-module.exports = Shell;
-
-},{"../../lib/async.js":1,"../encoding.js":17,"../errors.js":18,"../path.js":25,"./environment.js":31,"minimatch":11}],33:[function(require,module,exports){
-var Constants = require('./constants.js');
-<<<<<<< HEAD
-var Path = require('./path.js');
-
-function Stats(path, fileNode, devName) {
-  this.dev = devName;
-  this.node = fileNode.id;
-  this.type = fileNode.type;
-  this.size = fileNode.size;
-  this.nlinks = fileNode.nlinks;
-  this.atime = fileNode.atime;
-  this.mtime = fileNode.mtime;
-  this.ctime = fileNode.ctime;
-  this.version = fileNode.version;
-  this.mode = fileNode.mode;
-  this.uid = fileNode.uid;
-  this.gid = fileNode.gid;
-  this.name = Path.basename(path);
-}
-
-Stats.prototype.isFile = function() {
-  return this.type === Constants.NODE_TYPE_FILE;
-};
-
-Stats.prototype.isDirectory = function() {
-  return this.type === Constants.NODE_TYPE_DIRECTORY;
-};
-
-Stats.prototype.isSymbolicLink = function() {
-  return this.type === Constants.NODE_TYPE_SYMBOLIC_LINK;
-};
-=======
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
     if (err) {
       return complete(err);
     }
@@ -13564,12 +8864,11 @@ FileSystem.providers = providers;
 /**
  * Public API for FileSystem
  */
-['open', 'close', 'mknod', 'mkdir', 'rmdir', 'stat', 'fstat', 'link', 'unlink', 'read', 'readFile', 'write', 'writeFile', 'appendFile', 'exists', 'lseek', 'readdir', 'rename', 'readlink', 'symlink', 'lstat', 'truncate', 'ftruncate', 'utimes', 'futimes', 'setxattr', 'getxattr', 'fsetxattr', 'fgetxattr', 'removexattr', 'fremovexattr'].forEach(function (methodName) {
+['open', 'chmod', 'fchmod', 'chown', 'fchown', 'close', 'mknod', 'mkdir', 'rmdir', 'stat', 'fstat', 'link', 'unlink', 'read', 'readFile', 'write', 'writeFile', 'appendFile', 'exists', 'lseek', 'readdir', 'rename', 'readlink', 'symlink', 'lstat', 'truncate', 'ftruncate', 'utimes', 'futimes', 'setxattr', 'getxattr', 'fsetxattr', 'fgetxattr', 'removexattr', 'fremovexattr'].forEach(function (methodName) {
   FileSystem.prototype[methodName] = function () {
     var fs = this;
     var args = Array.prototype.slice.call(arguments, 0);
     var lastArgIndex = args.length - 1;
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
     // We may or may not get a callback, and since node.js supports
     // fire-and-forget style fs operations, we have to dance a bit here.
@@ -13579,17 +8878,6 @@ FileSystem.providers = providers;
     var error = fs.queueOrRun(function () {
       var context = fs.provider.openReadWriteContext();
 
-<<<<<<< HEAD
-<<<<<<< HEAD
-},{"./constants.js":15,"./path.js":25}],34:[function(require,module,exports){
-=======
-<<<<<<< HEAD
-},{"./constants.js":15}],34:[function(require,module,exports){
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-var Constants = require('./constants.js');
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
       // Fail early if the filesystem is in an error state (e.g.,
       // provider failed to open.
       if (FS_ERROR === fs.readyState) {
@@ -13603,23 +8891,12 @@ var Constants = require('./constants.js');
         callback.apply(fs, arguments);
       }
 
-<<<<<<< HEAD
-  this.id = Constants.SUPER_NODE_ID;
-  this.type = Constants.NODE_TYPE_META;
-  this.atime = options.atime || now;
-  this.ctime = options.ctime || now;
-  this.mtime = options.mtime || now;
-  // root node id (randomly generated)
-  this.rnode = options.rnode;
-}
-=======
       // Either add or replace the callback with our wrapper complete()
       if (missingCallback) {
         args.push(complete);
       } else {
         args[lastArgIndex] = complete;
       }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
 
       // Forward this call to the impl's version, using the following
       // call signature, with complete() as the callback/last-arg now:
@@ -13633,21 +8910,8 @@ var Constants = require('./constants.js');
   };
 });
 
-<<<<<<< HEAD
-FileSystem.prototype.Shell = function (options) {
-  return new Shell(this, options);
-};
-
-<<<<<<< HEAD
-},{"./constants.js":15}]},{},[22])(22)
-});
-<<<<<<< HEAD
-=======
-=======
-=======
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
 module.exports = FileSystem;
-},{"../../lib/nodash.js":14,"../path.js":4,"../shared.js":15,"../constants.js":16,"../providers/index.js":21,"../shell/shell.js":7,"../../lib/intercom.js":17,"../fs-watcher.js":18,"../errors.js":5,"./implementation.js":22}],1:[function(require,module,exports) {
+},{"../../lib/nodash.js":"96cB","../path.js":"UzoP","../shared.js":"3zBM","../constants.js":"iJA9","../providers/index.js":"AiW7","../shell/shell.js":"D1Ra","../../lib/intercom.js":"u7Jv","../fs-watcher.js":"VLEe","../errors.js":"p8GN","./implementation.js":"bsBG"}],"Focm":[function(require,module,exports) {
 module.exports = {
   FileSystem: require('./filesystem/interface.js'),
   Buffer: require('./buffer.js'),
@@ -13655,12 +8919,5 @@ module.exports = {
   Errors: require('./errors.js'),
   Shell: require('./shell/shell.js')
 };
-<<<<<<< HEAD
-},{"./filesystem/interface.js":6,"./buffer.js":3,"./path.js":4,"./errors.js":5}]},{},[1], "Filer")
-//# sourceMappingURL=/filer.map
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-=======
-},{"./filesystem/interface.js":6,"./buffer.js":3,"./path.js":4,"./errors.js":5,"./shell/shell.js":7}]},{},[1], "Filer")
-//# sourceMappingURL=/filer.map
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
+},{"./filesystem/interface.js":"GMi4","./buffer.js":"xfwq","./path.js":"UzoP","./errors.js":"p8GN","./shell/shell.js":"D1Ra"}]},{},["Focm"], "Filer")
+//# sourceMappingURL=/filer.map
\ No newline at end of file
diff --git a/dist/filer.map b/dist/filer.map
index 50913f7..857d4ff 100644
--- a/dist/filer.map
+++ b/dist/filer.map
@@ -1 +1 @@
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Cherry-picked bits of underscore.js, lodash.js\n\n/**\n * Lo-Dash 2.4.0 <http://lodash.com/>\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar ArrayProto = Array.prototype;\nvar nativeForEach = ArrayProto.forEach;\nvar nativeIndexOf = ArrayProto.indexOf;\nvar nativeSome = ArrayProto.some;\n\nvar ObjProto = Object.prototype;\nvar hasOwnProperty = ObjProto.hasOwnProperty;\nvar nativeKeys = Object.keys;\n\nvar breaker = {};\n\nfunction has(obj, key) {\n  return hasOwnProperty.call(obj, key);\n}\n\nvar keys = nativeKeys || function(obj) {\n  if (obj !== Object(obj)) throw new TypeError('Invalid object');\n  var keys = [];\n  for (var key in obj) if (has(obj, key)) keys.push(key);\n  return keys;\n};\n\nfunction size(obj) {\n  if (obj == null) return 0;\n  return (obj.length === +obj.length) ? obj.length : keys(obj).length;\n}\n\nfunction identity(value) {\n  return value;\n}\n\nfunction each(obj, iterator, context) {\n  var i, length;\n  if (obj == null) return;\n  if (nativeForEach && obj.forEach === nativeForEach) {\n    obj.forEach(iterator, context);\n  } else if (obj.length === +obj.length) {\n    for (i = 0, length = obj.length; i < length; i++) {\n      if (iterator.call(context, obj[i], i, obj) === breaker) return;\n    }\n  } else {\n    var keys = keys(obj);\n    for (i = 0, length = keys.length; i < length; i++) {\n      if (iterator.call(context, obj[keys[i]], keys[i], obj) === breaker) return;\n    }\n  }\n};\n\nfunction any(obj, iterator, context) {\n  iterator || (iterator = identity);\n  var result = false;\n  if (obj == null) return result;\n  if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);\n  each(obj, function(value, index, list) {\n    if (result || (result = iterator.call(context, value, index, list))) return breaker;\n  });\n  return !!result;\n};\n\nfunction contains(obj, target) {\n  if (obj == null) return false;\n  if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;\n  return any(obj, function(value) {\n    return value === target;\n  });\n};\n\nfunction Wrapped(value) {\n  this.value = value;\n}\nWrapped.prototype.has = function(key) {\n  return has(this.value, key);\n};\nWrapped.prototype.contains = function(target) {\n  return contains(this.value, target);\n};\nWrapped.prototype.size = function() {\n  return size(this.value);\n};\n\nfunction nodash(value) {\n  // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor\n  return (value && typeof value == 'object' && !Array.isArray(value) && hasOwnProperty.call(value, '__wrapped__'))\n    ? value\n    : new Wrapped(value);\n}\n\nmodule.exports = nodash;\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// Based on https://github.com/joyent/node/blob/41e53e557992a7d552a8e23de035f9463da25c99/lib/path.js\n\n// resolves . and .. elements in a path array with directory names there\n// must be no slashes, empty elements, or device names (c:\\) in the array\n// (so also no leading and trailing slashes - it does not distinguish\n// relative and absolute paths)\nfunction normalizeArray(parts, allowAboveRoot) {\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = parts.length - 1; i >= 0; i--) {\n    var last = parts[i];\n    if (last === '.') {\n      parts.splice(i, 1);\n    } else if (last === '..') {\n      parts.splice(i, 1);\n      up++;\n    } else if (up) {\n      parts.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (allowAboveRoot) {\n    for (; up--; up) {\n      parts.unshift('..');\n    }\n  }\n\n  return parts;\n}\n\n// Split a filename into [root, dir, basename, ext], unix version\n// 'root' is just a slash, or nothing.\nvar splitPathRe =\n      /^(\\/?)([\\s\\S]+\\/(?!$)|\\/)?((?:\\.{1,2}$|[\\s\\S]+?)?(\\.[^.\\/]*)?)$/;\nvar splitPath = function(filename) {\n  var result = splitPathRe.exec(filename);\n  return [result[1] || '', result[2] || '', result[3] || '', result[4] || ''];\n};\n\n// path.resolve([from ...], to)\nfunction resolve() {\n  var resolvedPath = '',\n      resolvedAbsolute = false;\n\n  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {\n    // XXXfiler: we don't have process.cwd() so we use '/' as a fallback\n    var path = (i >= 0) ? arguments[i] : '/';\n\n    // Skip empty and invalid entries\n    if (typeof path !== 'string' || !path) {\n      continue;\n    }\n\n    resolvedPath = path + '/' + resolvedPath;\n    resolvedAbsolute = path.charAt(0) === '/';\n  }\n\n  // At this point the path should be resolved to a full absolute path, but\n  // handle relative paths to be safe (might happen when process.cwd() fails)\n\n  // Normalize the path\n  resolvedPath = normalizeArray(resolvedPath.split('/').filter(function(p) {\n    return !!p;\n  }), !resolvedAbsolute).join('/');\n\n  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';\n}\n\n// path.normalize(path)\nfunction normalize(path) {\n  var isAbsolute = path.charAt(0) === '/',\n      trailingSlash = path.substr(-1) === '/';\n\n  // Normalize the path\n  path = normalizeArray(path.split('/').filter(function(p) {\n    return !!p;\n  }), !isAbsolute).join('/');\n\n  if (!path && !isAbsolute) {\n    path = '.';\n  }\n  /*\n   if (path && trailingSlash) {\n   path += '/';\n   }\n   */\n\n  return (isAbsolute ? '/' : '') + path;\n}\n\nfunction join() {\n  var paths = Array.prototype.slice.call(arguments, 0);\n  return normalize(paths.filter(function(p, index) {\n    return p && typeof p === 'string';\n  }).join('/'));\n}\n\n// path.relative(from, to)\nfunction relative(from, to) {\n  from = resolve(from).substr(1);\n  to = resolve(to).substr(1);\n\n  function trim(arr) {\n    var start = 0;\n    for (; start < arr.length; start++) {\n      if (arr[start] !== '') break;\n    }\n\n    var end = arr.length - 1;\n    for (; end >= 0; end--) {\n      if (arr[end] !== '') break;\n    }\n\n    if (start > end) return [];\n    return arr.slice(start, end - start + 1);\n  }\n\n  var fromParts = trim(from.split('/'));\n  var toParts = trim(to.split('/'));\n\n  var length = Math.min(fromParts.length, toParts.length);\n  var samePartsLength = length;\n  for (var i = 0; i < length; i++) {\n    if (fromParts[i] !== toParts[i]) {\n      samePartsLength = i;\n      break;\n    }\n  }\n\n  var outputParts = [];\n  for (var i = samePartsLength; i < fromParts.length; i++) {\n    outputParts.push('..');\n  }\n\n  outputParts = outputParts.concat(toParts.slice(samePartsLength));\n\n  return outputParts.join('/');\n}\n\nfunction dirname(path) {\n  var result = splitPath(path),\n      root = result[0],\n      dir = result[1];\n\n  if (!root && !dir) {\n    // No dirname whatsoever\n    return '.';\n  }\n\n  if (dir) {\n    // It has a dirname, strip trailing slash\n    dir = dir.substr(0, dir.length - 1);\n  }\n\n  return root + dir;\n}\n\nfunction basename(path, ext) {\n  var f = splitPath(path)[2];\n  // TODO: make this comparison case-insensitive on windows?\n  if (ext && f.substr(-1 * ext.length) === ext) {\n    f = f.substr(0, f.length - ext.length);\n  }\n  // XXXfiler: node.js just does `return f`\n  return f === \"\" ? \"/\" : f;\n}\n\nfunction extname(path) {\n  return splitPath(path)[3];\n}\n\nfunction isAbsolute(path) {\n  if(path.charAt(0) === '/') {\n    return true;\n  }\n  return false;\n}\n\nfunction isNull(path) {\n  if (('' + path).indexOf('\\u0000') !== -1) {\n    return true;\n  }\n  return false;\n}\n\n// Make sure we don't double-add a trailing slash (e.g., '/' -> '//')\nfunction addTrailing(path) {\n  return path.replace(/\\/*$/, '/');\n}\n\n// Deal with multiple slashes at the end, one, or none\n// and make sure we don't return the empty string.\nfunction removeTrailing(path) {\n  path = path.replace(/\\/*$/, '');\n  return path === '' ? '/' : path;\n}\n\n// XXXfiler: we don't support path.exists() or path.existsSync(), which\n// are deprecated, and need a FileSystem instance to work. Use fs.stat().\n\nmodule.exports = {\n  normalize: normalize,\n  resolve: resolve,\n  join: join,\n  relative: relative,\n  sep: '/',\n  delimiter: ':',\n  dirname: dirname,\n  basename: basename,\n  extname: extname,\n  isAbsolute: isAbsolute,\n  isNull: isNull,\n  // Non-node but useful...\n  addTrailing: addTrailing,\n  removeTrailing: removeTrailing\n};\n","function guid() {\n  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {\n    var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);\n    return v.toString(16);\n  }).toUpperCase();\n}\n\nfunction nop() {}\n\n/**\n * Convert a Uint8Array to a regular array\n */\nfunction u8toArray(u8) {\n  var array = [];\n  var len = u8.length;\n  for(var i = 0; i < len; i++) {\n    array[i] = u8[i];\n  }\n  return array;\n}\n\nmodule.exports = {\n  guid: guid,\n  u8toArray: u8toArray,\n  nop: nop\n};\n","var O_READ = 'READ';\nvar O_WRITE = 'WRITE';\nvar O_CREATE = 'CREATE';\nvar O_EXCLUSIVE = 'EXCLUSIVE';\nvar O_TRUNCATE = 'TRUNCATE';\nvar O_APPEND = 'APPEND';\nvar XATTR_CREATE = 'CREATE';\nvar XATTR_REPLACE = 'REPLACE';\n\nmodule.exports = {\n  FILE_SYSTEM_NAME: 'local',\n\n  FILE_STORE_NAME: 'files',\n\n  IDB_RO: 'readonly',\n  IDB_RW: 'readwrite',\n\n  WSQL_VERSION: \"1\",\n  WSQL_SIZE: 5 * 1024 * 1024,\n  WSQL_DESC: \"FileSystem Storage\",\n\n  MODE_FILE: 'FILE',\n  MODE_DIRECTORY: 'DIRECTORY',\n  MODE_SYMBOLIC_LINK: 'SYMLINK',\n  MODE_META: 'META',\n\n  SYMLOOP_MAX: 10,\n\n  BINARY_MIME_TYPE: 'application/octet-stream',\n  JSON_MIME_TYPE: 'application/json',\n\n  ROOT_DIRECTORY_NAME: '/', // basename(normalize(path))\n\n  // FS Mount Flags\n  FS_FORMAT: 'FORMAT',\n  FS_NOCTIME: 'NOCTIME',\n  FS_NOMTIME: 'NOMTIME',\n  FS_NODUPEIDCHECK: 'FS_NODUPEIDCHECK',\n\n  // FS File Open Flags\n  O_READ: O_READ,\n  O_WRITE: O_WRITE,\n  O_CREATE: O_CREATE,\n  O_EXCLUSIVE: O_EXCLUSIVE,\n  O_TRUNCATE: O_TRUNCATE,\n  O_APPEND: O_APPEND,\n\n  O_FLAGS: {\n    'r': [O_READ],\n    'r+': [O_READ, O_WRITE],\n    'w': [O_WRITE, O_CREATE, O_TRUNCATE],\n    'w+': [O_WRITE, O_READ, O_CREATE, O_TRUNCATE],\n    'wx': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],\n    'wx+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],\n    'a': [O_WRITE, O_CREATE, O_APPEND],\n    'a+': [O_WRITE, O_READ, O_CREATE, O_APPEND],\n    'ax': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_APPEND],\n    'ax+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_APPEND]\n  },\n\n  XATTR_CREATE: XATTR_CREATE,\n  XATTR_REPLACE: XATTR_REPLACE,\n\n  FS_READY: 'READY',\n  FS_PENDING: 'PENDING',\n  FS_ERROR: 'ERROR',\n\n  SUPER_NODE_ID: '00000000-0000-0000-0000-000000000000',\n\n  // Reserved File Descriptors for streams\n  STDIN: 0,\n  STDOUT: 1,\n  STDERR: 2,\n  FIRST_DESCRIPTOR: 3,\n\n  ENVIRONMENT: {\n    TMP: '/tmp',\n    PATH: ''\n  }\n};\n","var errors = {};\n[\n  /**\n   * node.js errors - we only use some of these, add as needed.\n   */\n  //'-1:UNKNOWN:unknown error',\n  //'0:OK:success',\n  //'1:EOF:end of file',\n  //'2:EADDRINFO:getaddrinfo error',\n  //'3:EACCES:permission denied',\n  //'4:EAGAIN:resource temporarily unavailable',\n  //'5:EADDRINUSE:address already in use',\n  //'6:EADDRNOTAVAIL:address not available',\n  //'7:EAFNOSUPPORT:address family not supported',\n  //'8:EALREADY:connection already in progress',\n  '9:EBADF:bad file descriptor',\n  '10:EBUSY:resource busy or locked',\n  //'11:ECONNABORTED:software caused connection abort',\n  //'12:ECONNREFUSED:connection refused',\n  //'13:ECONNRESET:connection reset by peer',\n  //'14:EDESTADDRREQ:destination address required',\n  //'15:EFAULT:bad address in system call argument',\n  //'16:EHOSTUNREACH:host is unreachable',\n  //'17:EINTR:interrupted system call',\n  '18:EINVAL:invalid argument',\n  //'19:EISCONN:socket is already connected',\n  //'20:EMFILE:too many open files',\n  //'21:EMSGSIZE:message too long',\n  //'22:ENETDOWN:network is down',\n  //'23:ENETUNREACH:network is unreachable',\n  //'24:ENFILE:file table overflow',\n  //'25:ENOBUFS:no buffer space available',\n  //'26:ENOMEM:not enough memory',\n  '27:ENOTDIR:not a directory',\n  '28:EISDIR:illegal operation on a directory',\n  //'29:ENONET:machine is not on the network',\n  // errno 30 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js\n  //'31:ENOTCONN:socket is not connected',\n  //'32:ENOTSOCK:socket operation on non-socket',\n  //'33:ENOTSUP:operation not supported on socket',\n  '34:ENOENT:no such file or directory',\n  //'35:ENOSYS:function not implemented',\n  //'36:EPIPE:broken pipe',\n  //'37:EPROTO:protocol error',\n  //'38:EPROTONOSUPPORT:protocol not supported',\n  //'39:EPROTOTYPE:protocol wrong type for socket',\n  //'40:ETIMEDOUT:connection timed out',\n  //'41:ECHARSET:invalid Unicode character',\n  //'42:EAIFAMNOSUPPORT:address family for hostname not supported',\n  // errno 43 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js\n  //'44:EAISERVICE:servname not supported for ai_socktype',\n  //'45:EAISOCKTYPE:ai_socktype not supported',\n  //'46:ESHUTDOWN:cannot send after transport endpoint shutdown',\n  '47:EEXIST:file already exists',\n  //'48:ESRCH:no such process',\n  //'49:ENAMETOOLONG:name too long',\n  '50:EPERM:operation not permitted',\n  '51:ELOOP:too many symbolic links encountered',\n  //'52:EXDEV:cross-device link not permitted',\n  '53:ENOTEMPTY:directory not empty',\n  //'54:ENOSPC:no space left on device',\n  '55:EIO:i/o error',\n  //'56:EROFS:read-only file system',\n  //'57:ENODEV:no such device',\n  //'58:ESPIPE:invalid seek',\n  //'59:ECANCELED:operation canceled',\n\n  /**\n   * Filer specific errors\n   */\n  '1000:ENOTMOUNTED:not mounted',\n  '1001:EFILESYSTEMERROR:missing super node, use \\'FORMAT\\' flag to format filesystem.',\n  '1002:ENOATTR:attribute does not exist'\n\n].forEach(function(e) {\n  e = e.split(':');\n  var errno = +e[0];\n  var errName = e[1];\n  var defaultMessage = e[2];\n\n  function FilerError(msg, path) {\n    Error.call(this);\n\n    this.name = errName;\n    this.code = errName;\n    this.errno = errno;\n    this.message = msg || defaultMessage;\n    if(path) {\n      this.path = path;\n    }\n    this.stack = (new Error(this.message)).stack;\n  }\n  FilerError.prototype = Object.create(Error.prototype);\n  FilerError.prototype.constructor = FilerError;\n  FilerError.prototype.toString = function() {\n    var pathInfo = this.path ? (', \\'' + this.path + '\\'') : '';\n    return this.name + ': ' + this.message + pathInfo;\n  };\n\n  // We expose the error as both Errors.EINVAL and Errors[18]\n  errors[errName] = errors[errno] = FilerError;\n});\n\nmodule.exports = errors;\n","'use strict'\n\nexports.byteLength = byteLength\nexports.toByteArray = toByteArray\nexports.fromByteArray = fromByteArray\n\nvar lookup = []\nvar revLookup = []\nvar Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array\n\nvar code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'\nfor (var i = 0, len = code.length; i < len; ++i) {\n  lookup[i] = code[i]\n  revLookup[code.charCodeAt(i)] = i\n}\n\n// Support decoding URL-safe base64 strings, as Node.js does.\n// See: https://en.wikipedia.org/wiki/Base64#URL_applications\nrevLookup['-'.charCodeAt(0)] = 62\nrevLookup['_'.charCodeAt(0)] = 63\n\nfunction getLens (b64) {\n  var len = b64.length\n\n  if (len % 4 > 0) {\n    throw new Error('Invalid string. Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  for (var i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(\n      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)\n    ))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};\n","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; ++i) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n\nfunction isnan (val) {\n  return val !== val // eslint-disable-line no-self-compare\n}\n","function FilerBuffer (subject, encoding, nonZero) {\n\n  // Automatically turn ArrayBuffer into Uint8Array so that underlying\n  // Buffer code doesn't just throw away and ignore ArrayBuffer data.\n  if (subject instanceof ArrayBuffer) {\n    subject = new Uint8Array(subject);\n  }\n\n  return new Buffer(subject, encoding, nonZero);\n};\n\n// Inherit prototype from Buffer\nFilerBuffer.prototype = Object.create(Buffer.prototype);\nFilerBuffer.prototype.constructor = FilerBuffer;\n\n// Also copy static methods onto FilerBuffer ctor\nObject.keys(Buffer).forEach(function (p) {\n  if (Buffer.hasOwnProperty(p)) {\n    FilerBuffer[p] = Buffer[p];\n  }\n});\n\nmodule.exports = FilerBuffer;\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\nvar FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;\nvar IDB_RW = require('../constants.js').IDB_RW;\nvar IDB_RO = require('../constants.js').IDB_RO;\nvar Errors = require('../errors.js');\nvar FilerBuffer = require('../buffer.js');\n\nvar indexedDB = global.indexedDB       ||\n                global.mozIndexedDB    ||\n                global.webkitIndexedDB ||\n                global.msIndexedDB;\n\nfunction IndexedDBContext(db, mode) {\n  this.db = db;\n  this.mode = mode;\n}\n\nIndexedDBContext.prototype._getObjectStore = function() {\n  if(this.objectStore) {\n    return this.objectStore;\n  }\n\n  var transaction = this.db.transaction(FILE_STORE_NAME, this.mode);\n  this.objectStore = transaction.objectStore(FILE_STORE_NAME);\n  return this.objectStore;\n};\n\nIndexedDBContext.prototype.clear = function(callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.clear();\n    request.onsuccess = function() {\n      callback();\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\nIndexedDBContext.prototype._get = function(key, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.get(key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\nIndexedDBContext.prototype.getObject = function(key, callback) {\n  this._get(key, callback);\n};\nIndexedDBContext.prototype.getBuffer = function(key, callback) {\n  this._get(key, function(err, arrayBuffer) {\n    if(err) {\n      return callback(err);\n    }\n    callback(null, new FilerBuffer(arrayBuffer));\n  });\n};\n\nIndexedDBContext.prototype._put = function(key, value, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.put(value, key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\nIndexedDBContext.prototype.putObject = function(key, value, callback) {\n  this._put(key, value, callback);\n};\nIndexedDBContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {\n  var buf = uint8BackedBuffer.buffer;\n  this._put(key, buf, callback);\n};\n\nIndexedDBContext.prototype.delete = function(key, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.delete(key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\n\nfunction IndexedDB(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n  this.db = null;\n}\nIndexedDB.isSupported = function() {\n  return !!indexedDB;\n};\n\nIndexedDB.prototype.open = function(callback) {\n  var that = this;\n\n  // Bail if we already have a db open\n  if(that.db) {\n    return callback();\n  }\n\n  try {\n    // NOTE: we're not using versioned databases.\n    var openRequest = indexedDB.open(that.name);\n\n    // If the db doesn't exist, we'll create it\n    openRequest.onupgradeneeded = function onupgradeneeded(event) {\n      var db = event.target.result;\n\n      if(db.objectStoreNames.contains(FILE_STORE_NAME)) {\n        db.deleteObjectStore(FILE_STORE_NAME);\n      }\n      db.createObjectStore(FILE_STORE_NAME);\n    };\n\n    openRequest.onsuccess = function onsuccess(event) {\n      that.db = event.target.result;\n      callback();\n    };\n    openRequest.onerror = function onerror(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\nIndexedDB.prototype.getReadOnlyContext = function() {\n  return new IndexedDBContext(this.db, IDB_RO);\n};\nIndexedDB.prototype.getReadWriteContext = function() {\n  return new IndexedDBContext(this.db, IDB_RW);\n};\n\nmodule.exports = IndexedDB;\n","/*\n * base64-arraybuffer\n * https://github.com/niklasvh/base64-arraybuffer\n *\n * Copyright (c) 2012 Niklas von Hertzen\n * Licensed under the MIT license.\n */\n(function(){\n  \"use strict\";\n\n  var chars = \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/\";\n\n  // Use a lookup table to find the index.\n  var lookup = new Uint8Array(256);\n  for (var i = 0; i < chars.length; i++) {\n    lookup[chars.charCodeAt(i)] = i;\n  }\n\n  exports.encode = function(arraybuffer) {\n    var bytes = new Uint8Array(arraybuffer),\n    i, len = bytes.length, base64 = \"\";\n\n    for (i = 0; i < len; i+=3) {\n      base64 += chars[bytes[i] >> 2];\n      base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];\n      base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];\n      base64 += chars[bytes[i + 2] & 63];\n    }\n\n    if ((len % 3) === 2) {\n      base64 = base64.substring(0, base64.length - 1) + \"=\";\n    } else if (len % 3 === 1) {\n      base64 = base64.substring(0, base64.length - 2) + \"==\";\n    }\n\n    return base64;\n  };\n\n  exports.decode =  function(base64) {\n    var bufferLength = base64.length * 0.75,\n    len = base64.length, i, p = 0,\n    encoded1, encoded2, encoded3, encoded4;\n\n    if (base64[base64.length - 1] === \"=\") {\n      bufferLength--;\n      if (base64[base64.length - 2] === \"=\") {\n        bufferLength--;\n      }\n    }\n\n    var arraybuffer = new ArrayBuffer(bufferLength),\n    bytes = new Uint8Array(arraybuffer);\n\n    for (i = 0; i < len; i+=4) {\n      encoded1 = lookup[base64.charCodeAt(i)];\n      encoded2 = lookup[base64.charCodeAt(i+1)];\n      encoded3 = lookup[base64.charCodeAt(i+2)];\n      encoded4 = lookup[base64.charCodeAt(i+3)];\n\n      bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);\n      bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);\n      bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);\n    }\n\n    return arraybuffer;\n  };\n})();\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\nvar FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;\nvar WSQL_VERSION = require('../constants.js').WSQL_VERSION;\nvar WSQL_SIZE = require('../constants.js').WSQL_SIZE;\nvar WSQL_DESC = require('../constants.js').WSQL_DESC;\nvar Errors = require('../errors.js');\nvar FilerBuffer = require('../buffer.js');\nvar base64ArrayBuffer = require('base64-arraybuffer');\n\nfunction WebSQLContext(db, isReadOnly) {\n  var that = this;\n  this.getTransaction = function(callback) {\n    if(that.transaction) {\n      callback(that.transaction);\n      return;\n    }\n    // Either do readTransaction() (read-only) or transaction() (read/write)\n    db[isReadOnly ? 'readTransaction' : 'transaction'](function(transaction) {\n      that.transaction = transaction;\n      callback(transaction);\n    });\n  };\n}\n\nWebSQLContext.prototype.clear = function(callback) {\n  function onError(transaction, error) {\n    callback(error);\n  }\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  this.getTransaction(function(transaction) {\n    transaction.executeSql(\"DELETE FROM \" + FILE_STORE_NAME + \";\",\n                           [], onSuccess, onError);\n  });\n};\n\nfunction _get(getTransaction, key, callback) {\n  function onSuccess(transaction, result) {\n    // If the key isn't found, return null\n    var value = result.rows.length === 0 ? null : result.rows.item(0).data;\n    callback(null, value);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  getTransaction(function(transaction) {\n    transaction.executeSql(\"SELECT data FROM \" + FILE_STORE_NAME + \" WHERE id = ? LIMIT 1;\",\n                           [key], onSuccess, onError);\n  });\n}\nWebSQLContext.prototype.getObject = function(key, callback) {\n  _get(this.getTransaction, key, function(err, result) {\n    if(err) {\n      return callback(err);\n    }\n\n    try {\n      if(result) {\n        result = JSON.parse(result);\n      }\n    } catch(e) {\n      return callback(e);\n    }\n\n    callback(null, result);\n  });\n};\nWebSQLContext.prototype.getBuffer = function(key, callback) {\n  _get(this.getTransaction, key, function(err, result) {\n    if(err) {\n      return callback(err);\n    }\n\n    // Deal with zero-length ArrayBuffers, which will be encoded as ''\n    if(result || result === '') {\n      var arrayBuffer = base64ArrayBuffer.decode(result);\n      result = new FilerBuffer(arrayBuffer);\n    }\n\n    callback(null, result);\n  });\n};\n\nfunction _put(getTransaction, key, value, callback) {\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  getTransaction(function(transaction) {\n    transaction.executeSql(\"INSERT OR REPLACE INTO \" + FILE_STORE_NAME + \" (id, data) VALUES (?, ?);\",\n                           [key, value], onSuccess, onError);\n  });\n}\nWebSQLContext.prototype.putObject = function(key, value, callback) {\n  var json = JSON.stringify(value);\n  _put(this.getTransaction, key, json, callback);\n};\nWebSQLContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {\n  var base64 = base64ArrayBuffer.encode(uint8BackedBuffer.buffer);\n  _put(this.getTransaction, key, base64, callback);\n};\n\nWebSQLContext.prototype.delete = function(key, callback) {\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  this.getTransaction(function(transaction) {\n    transaction.executeSql(\"DELETE FROM \" + FILE_STORE_NAME + \" WHERE id = ?;\",\n                           [key], onSuccess, onError);\n  });\n};\n\n\nfunction WebSQL(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n  this.db = null;\n}\nWebSQL.isSupported = function() {\n  return !!global.openDatabase;\n};\n\nWebSQL.prototype.open = function(callback) {\n  var that = this;\n\n  // Bail if we already have a db open\n  if(that.db) {\n    return callback();\n  }\n\n  var db = global.openDatabase(that.name, WSQL_VERSION, WSQL_DESC, WSQL_SIZE);\n  if(!db) {\n    callback(\"[WebSQL] Unable to open database.\");\n    return;\n  }\n\n  function onError(transaction, error) {\n    if (error.code === 5) {\n      callback(new Errors.EINVAL('WebSQL cannot be accessed. If private browsing is enabled, disable it.'));\n    }\n    callback(error);\n  }\n  function onSuccess(transaction, result) {\n    that.db = db;\n    callback();\n  }\n\n  // Create the table and index we'll need to store the fs data.\n  db.transaction(function(transaction) {\n    function createIndex(transaction) {\n      transaction.executeSql(\"CREATE INDEX IF NOT EXISTS idx_\" + FILE_STORE_NAME + \"_id\" +\n                             \" on \" + FILE_STORE_NAME + \" (id);\",\n                             [], onSuccess, onError);\n    }\n    transaction.executeSql(\"CREATE TABLE IF NOT EXISTS \" + FILE_STORE_NAME + \" (id unique, data TEXT);\",\n                           [], createIndex, onError);\n  });\n};\nWebSQL.prototype.getReadOnlyContext = function() {\n  return new WebSQLContext(this.db, true);\n};\nWebSQL.prototype.getReadWriteContext = function() {\n  return new WebSQLContext(this.db, false);\n};\n\nmodule.exports = WebSQL;\n","// shim for using process in browser\nvar process = module.exports = {};\n\n// cached from whatever global is present so that test runners that stub it\n// don't break things.  But we need to wrap it in a try catch in case it is\n// wrapped in strict mode code which doesn't define any globals.  It's inside a\n// function because try/catches deoptimize in certain engines.\n\nvar cachedSetTimeout;\nvar cachedClearTimeout;\n\nfunction defaultSetTimout() {\n    throw new Error('setTimeout has not been defined');\n}\nfunction defaultClearTimeout () {\n    throw new Error('clearTimeout has not been defined');\n}\n(function () {\n    try {\n        if (typeof setTimeout === 'function') {\n            cachedSetTimeout = setTimeout;\n        } else {\n            cachedSetTimeout = defaultSetTimout;\n        }\n    } catch (e) {\n        cachedSetTimeout = defaultSetTimout;\n    }\n    try {\n        if (typeof clearTimeout === 'function') {\n            cachedClearTimeout = clearTimeout;\n        } else {\n            cachedClearTimeout = defaultClearTimeout;\n        }\n    } catch (e) {\n        cachedClearTimeout = defaultClearTimeout;\n    }\n} ())\nfunction runTimeout(fun) {\n    if (cachedSetTimeout === setTimeout) {\n        //normal enviroments in sane situations\n        return setTimeout(fun, 0);\n    }\n    // if setTimeout wasn't available but was latter defined\n    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {\n        cachedSetTimeout = setTimeout;\n        return setTimeout(fun, 0);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedSetTimeout(fun, 0);\n    } catch(e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally\n            return cachedSetTimeout.call(null, fun, 0);\n        } catch(e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error\n            return cachedSetTimeout.call(this, fun, 0);\n        }\n    }\n\n\n}\nfunction runClearTimeout(marker) {\n    if (cachedClearTimeout === clearTimeout) {\n        //normal enviroments in sane situations\n        return clearTimeout(marker);\n    }\n    // if clearTimeout wasn't available but was latter defined\n    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {\n        cachedClearTimeout = clearTimeout;\n        return clearTimeout(marker);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedClearTimeout(marker);\n    } catch (e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally\n            return cachedClearTimeout.call(null, marker);\n        } catch (e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.\n            // Some versions of I.E. have different rules for clearTimeout vs setTimeout\n            return cachedClearTimeout.call(this, marker);\n        }\n    }\n\n\n\n}\nvar queue = [];\nvar draining = false;\nvar currentQueue;\nvar queueIndex = -1;\n\nfunction cleanUpNextTick() {\n    if (!draining || !currentQueue) {\n        return;\n    }\n    draining = false;\n    if (currentQueue.length) {\n        queue = currentQueue.concat(queue);\n    } else {\n        queueIndex = -1;\n    }\n    if (queue.length) {\n        drainQueue();\n    }\n}\n\nfunction drainQueue() {\n    if (draining) {\n        return;\n    }\n    var timeout = runTimeout(cleanUpNextTick);\n    draining = true;\n\n    var len = queue.length;\n    while(len) {\n        currentQueue = queue;\n        queue = [];\n        while (++queueIndex < len) {\n            if (currentQueue) {\n                currentQueue[queueIndex].run();\n            }\n        }\n        queueIndex = -1;\n        len = queue.length;\n    }\n    currentQueue = null;\n    draining = false;\n    runClearTimeout(timeout);\n}\n\nprocess.nextTick = function (fun) {\n    var args = new Array(arguments.length - 1);\n    if (arguments.length > 1) {\n        for (var i = 1; i < arguments.length; i++) {\n            args[i - 1] = arguments[i];\n        }\n    }\n    queue.push(new Item(fun, args));\n    if (queue.length === 1 && !draining) {\n        runTimeout(drainQueue);\n    }\n};\n\n// v8 likes predictible objects\nfunction Item(fun, array) {\n    this.fun = fun;\n    this.array = array;\n}\nItem.prototype.run = function () {\n    this.fun.apply(null, this.array);\n};\nprocess.title = 'browser';\nprocess.browser = true;\nprocess.env = {};\nprocess.argv = [];\nprocess.version = ''; // empty string to avoid regexp issues\nprocess.versions = {};\n\nfunction noop() {}\n\nprocess.on = noop;\nprocess.addListener = noop;\nprocess.once = noop;\nprocess.off = noop;\nprocess.removeListener = noop;\nprocess.removeAllListeners = noop;\nprocess.emit = noop;\nprocess.prependListener = noop;\nprocess.prependOnceListener = noop;\n\nprocess.listeners = function (name) { return [] }\n\nprocess.binding = function (name) {\n    throw new Error('process.binding is not supported');\n};\n\nprocess.cwd = function () { return '/' };\nprocess.chdir = function (dir) {\n    throw new Error('process.chdir is not supported');\n};\nprocess.umask = function() { return 0; };\n","/*global setImmediate: false, setTimeout: false, console: false */\n\n/**\n * async.js shim, based on https://raw.github.com/caolan/async/master/lib/async.js Feb 18, 2014\n * Used under MIT - https://github.com/caolan/async/blob/master/LICENSE\n */\n\n(function () {\n\n    var async = {};\n\n    // async.js functions used in Filer\n\n    //// nextTick implementation with browser-compatible fallback ////\n    if (typeof process === 'undefined' || !(process.nextTick)) {\n        if (typeof setImmediate === 'function') {\n            async.nextTick = function (fn) {\n                // not a direct alias for IE10 compatibility\n                setImmediate(fn);\n            };\n            async.setImmediate = async.nextTick;\n        }\n        else {\n            async.nextTick = function (fn) {\n                setTimeout(fn, 0);\n            };\n            async.setImmediate = async.nextTick;\n        }\n    }\n    else {\n        async.nextTick = process.nextTick;\n        if (typeof setImmediate !== 'undefined') {\n            async.setImmediate = function (fn) {\n              // not a direct alias for IE10 compatibility\n              setImmediate(fn);\n            };\n        }\n        else {\n            async.setImmediate = async.nextTick;\n        }\n    }\n\n    async.eachSeries = function (arr, iterator, callback) {\n        callback = callback || function () {};\n        if (!arr.length) {\n            return callback();\n        }\n        var completed = 0;\n        var iterate = function () {\n            iterator(arr[completed], function (err) {\n                if (err) {\n                    callback(err);\n                    callback = function () {};\n                }\n                else {\n                    completed += 1;\n                    if (completed >= arr.length) {\n                        callback();\n                    }\n                    else {\n                        iterate();\n                    }\n                }\n            });\n        };\n        iterate();\n    };\n    async.forEachSeries = async.eachSeries;\n\n    // AMD / RequireJS\n    if (typeof define !== 'undefined' && define.amd) {\n        define([], function () {\n            return async;\n        });\n    }\n    // Node.js\n    else if (typeof module !== 'undefined' && module.exports) {\n        module.exports = async;\n    }\n    // included directly via <script> tag\n    else {\n        root.async = async;\n    }\n\n}());\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\n// NOTE: prefer setImmediate to nextTick for proper recursion yielding.\n// see https://github.com/js-platform/filer/pull/24\nvar asyncCallback = require('../../lib/async.js').setImmediate;\n\n/**\n * Make shared in-memory DBs possible when using the same name.\n */\nvar createDB = (function() {\n  var pool = {};\n  return function getOrCreate(name) {\n    if(!pool.hasOwnProperty(name)) {\n      pool[name] = {};\n    }\n    return pool[name];\n  };\n}());\n\nfunction MemoryContext(db, readOnly) {\n  this.readOnly = readOnly;\n  this.objectStore = db;\n}\n\nMemoryContext.prototype.clear = function(callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  var objectStore = this.objectStore;\n  Object.keys(objectStore).forEach(function(key){\n    delete objectStore[key];\n  });\n  asyncCallback(callback);\n};\n\n// Memory context doesn't care about differences between Object and Buffer\nMemoryContext.prototype.getObject =\nMemoryContext.prototype.getBuffer =\nfunction(key, callback) {\n  var that = this;\n  asyncCallback(function() {\n    callback(null, that.objectStore[key]);\n  });\n};\nMemoryContext.prototype.putObject =\nMemoryContext.prototype.putBuffer =\nfunction(key, value, callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  this.objectStore[key] = value;\n  asyncCallback(callback);\n};\n\nMemoryContext.prototype.delete = function(key, callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  delete this.objectStore[key];\n  asyncCallback(callback);\n};\n\n\nfunction Memory(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n}\nMemory.isSupported = function() {\n  return true;\n};\n\nMemory.prototype.open = function(callback) {\n  this.db = createDB(this.name);\n  asyncCallback(callback);\n};\nMemory.prototype.getReadOnlyContext = function() {\n  return new MemoryContext(this.db, true);\n};\nMemory.prototype.getReadWriteContext = function() {\n  return new MemoryContext(this.db, false);\n};\n\nmodule.exports = Memory;\n","var IndexedDB = require('./indexeddb.js');\nvar WebSQL = require('./websql.js');\nvar Memory = require('./memory.js');\n\nmodule.exports = {\n  IndexedDB: IndexedDB,\n  WebSQL: WebSQL,\n  Memory: Memory,\n\n  /**\n   * Convenience Provider references\n   */\n\n  // The default provider to use when none is specified\n  Default: IndexedDB,\n\n  // The Fallback provider does automatic fallback checks\n  Fallback: (function() {\n    if(IndexedDB.isSupported()) {\n      return IndexedDB;\n    }\n\n    if(WebSQL.isSupported()) {\n      return WebSQL;\n    }\n\n    function NotSupported() {\n      throw \"[Filer Error] Your browser doesn't support IndexedDB or WebSQL.\";\n    }\n    NotSupported.isSupported = function() {\n      return false;\n    };\n    return NotSupported;\n  }())\n};\n","var defaults = require('../constants.js').ENVIRONMENT;\n\nmodule.exports = function Environment(env) {\n  env = env || {};\n  env.TMP = env.TMP || defaults.TMP;\n  env.PATH = env.PATH || defaults.PATH;\n\n  this.get = function(name) {\n    return env[name];\n  };\n\n  this.set = function(name, value) {\n    env[name] = value;\n  };\n};\n","// Adapt encodings to work with Buffer or Uint8Array, they expect the latter\nfunction decode(buf) {\n  return buf.toString('utf8');\n}\n\nfunction encode(string) {\n  return new Buffer(string, 'utf8');\n}\n\nmodule.exports = {\n  encode: encode,\n  decode: decode\n};\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// resolves . and .. elements in a path array with directory names there\n// must be no slashes, empty elements, or device names (c:\\) in the array\n// (so also no leading and trailing slashes - it does not distinguish\n// relative and absolute paths)\nfunction normalizeArray(parts, allowAboveRoot) {\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = parts.length - 1; i >= 0; i--) {\n    var last = parts[i];\n    if (last === '.') {\n      parts.splice(i, 1);\n    } else if (last === '..') {\n      parts.splice(i, 1);\n      up++;\n    } else if (up) {\n      parts.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (allowAboveRoot) {\n    for (; up--; up) {\n      parts.unshift('..');\n    }\n  }\n\n  return parts;\n}\n\n// Split a filename into [root, dir, basename, ext], unix version\n// 'root' is just a slash, or nothing.\nvar splitPathRe =\n    /^(\\/?|)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?|)(\\.[^.\\/]*|))(?:[\\/]*)$/;\nvar splitPath = function(filename) {\n  return splitPathRe.exec(filename).slice(1);\n};\n\n// path.resolve([from ...], to)\n// posix version\nexports.resolve = function() {\n  var resolvedPath = '',\n      resolvedAbsolute = false;\n\n  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {\n    var path = (i >= 0) ? arguments[i] : process.cwd();\n\n    // Skip empty and invalid entries\n    if (typeof path !== 'string') {\n      throw new TypeError('Arguments to path.resolve must be strings');\n    } else if (!path) {\n      continue;\n    }\n\n    resolvedPath = path + '/' + resolvedPath;\n    resolvedAbsolute = path.charAt(0) === '/';\n  }\n\n  // At this point the path should be resolved to a full absolute path, but\n  // handle relative paths to be safe (might happen when process.cwd() fails)\n\n  // Normalize the path\n  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {\n    return !!p;\n  }), !resolvedAbsolute).join('/');\n\n  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';\n};\n\n// path.normalize(path)\n// posix version\nexports.normalize = function(path) {\n  var isAbsolute = exports.isAbsolute(path),\n      trailingSlash = substr(path, -1) === '/';\n\n  // Normalize the path\n  path = normalizeArray(filter(path.split('/'), function(p) {\n    return !!p;\n  }), !isAbsolute).join('/');\n\n  if (!path && !isAbsolute) {\n    path = '.';\n  }\n  if (path && trailingSlash) {\n    path += '/';\n  }\n\n  return (isAbsolute ? '/' : '') + path;\n};\n\n// posix version\nexports.isAbsolute = function(path) {\n  return path.charAt(0) === '/';\n};\n\n// posix version\nexports.join = function() {\n  var paths = Array.prototype.slice.call(arguments, 0);\n  return exports.normalize(filter(paths, function(p, index) {\n    if (typeof p !== 'string') {\n      throw new TypeError('Arguments to path.join must be strings');\n    }\n    return p;\n  }).join('/'));\n};\n\n\n// path.relative(from, to)\n// posix version\nexports.relative = function(from, to) {\n  from = exports.resolve(from).substr(1);\n  to = exports.resolve(to).substr(1);\n\n  function trim(arr) {\n    var start = 0;\n    for (; start < arr.length; start++) {\n      if (arr[start] !== '') break;\n    }\n\n    var end = arr.length - 1;\n    for (; end >= 0; end--) {\n      if (arr[end] !== '') break;\n    }\n\n    if (start > end) return [];\n    return arr.slice(start, end - start + 1);\n  }\n\n  var fromParts = trim(from.split('/'));\n  var toParts = trim(to.split('/'));\n\n  var length = Math.min(fromParts.length, toParts.length);\n  var samePartsLength = length;\n  for (var i = 0; i < length; i++) {\n    if (fromParts[i] !== toParts[i]) {\n      samePartsLength = i;\n      break;\n    }\n  }\n\n  var outputParts = [];\n  for (var i = samePartsLength; i < fromParts.length; i++) {\n    outputParts.push('..');\n  }\n\n  outputParts = outputParts.concat(toParts.slice(samePartsLength));\n\n  return outputParts.join('/');\n};\n\nexports.sep = '/';\nexports.delimiter = ':';\n\nexports.dirname = function(path) {\n  var result = splitPath(path),\n      root = result[0],\n      dir = result[1];\n\n  if (!root && !dir) {\n    // No dirname whatsoever\n    return '.';\n  }\n\n  if (dir) {\n    // It has a dirname, strip trailing slash\n    dir = dir.substr(0, dir.length - 1);\n  }\n\n  return root + dir;\n};\n\n\nexports.basename = function(path, ext) {\n  var f = splitPath(path)[2];\n  // TODO: make this comparison case-insensitive on windows?\n  if (ext && f.substr(-1 * ext.length) === ext) {\n    f = f.substr(0, f.length - ext.length);\n  }\n  return f;\n};\n\n\nexports.extname = function(path) {\n  return splitPath(path)[3];\n};\n\nfunction filter (xs, f) {\n    if (xs.filter) return xs.filter(f);\n    var res = [];\n    for (var i = 0; i < xs.length; i++) {\n        if (f(xs[i], i, xs)) res.push(xs[i]);\n    }\n    return res;\n}\n\n// String.prototype.substr - negative index don't work in IE8\nvar substr = 'ab'.substr(-1) === 'b'\n    ? function (str, start, len) { return str.substr(start, len) }\n    : function (str, start, len) {\n        if (start < 0) start = str.length + start;\n        return str.substr(start, len);\n    }\n;\n","module.exports = function (xs, fn) {\n    var res = [];\n    for (var i = 0; i < xs.length; i++) {\n        var x = fn(xs[i], i);\n        if (isArray(x)) res.push.apply(res, x);\n        else res.push(x);\n    }\n    return res;\n};\n\nvar isArray = Array.isArray || function (xs) {\n    return Object.prototype.toString.call(xs) === '[object Array]';\n};\n","'use strict';\nmodule.exports = balanced;\nfunction balanced(a, b, str) {\n  if (a instanceof RegExp) a = maybeMatch(a, str);\n  if (b instanceof RegExp) b = maybeMatch(b, str);\n\n  var r = range(a, b, str);\n\n  return r && {\n    start: r[0],\n    end: r[1],\n    pre: str.slice(0, r[0]),\n    body: str.slice(r[0] + a.length, r[1]),\n    post: str.slice(r[1] + b.length)\n  };\n}\n\nfunction maybeMatch(reg, str) {\n  var m = str.match(reg);\n  return m ? m[0] : null;\n}\n\nbalanced.range = range;\nfunction range(a, b, str) {\n  var begs, beg, left, right, result;\n  var ai = str.indexOf(a);\n  var bi = str.indexOf(b, ai + 1);\n  var i = ai;\n\n  if (ai >= 0 && bi > 0) {\n    begs = [];\n    left = str.length;\n\n    while (i >= 0 && !result) {\n      if (i == ai) {\n        begs.push(i);\n        ai = str.indexOf(a, i + 1);\n      } else if (begs.length == 1) {\n        result = [ begs.pop(), bi ];\n      } else {\n        beg = begs.pop();\n        if (beg < left) {\n          left = beg;\n          right = bi;\n        }\n\n        bi = str.indexOf(b, i + 1);\n      }\n\n      i = ai < bi && ai >= 0 ? ai : bi;\n    }\n\n    if (begs.length) {\n      result = [ left, right ];\n    }\n  }\n\n  return result;\n}\n","var concatMap = require('concat-map');\nvar balanced = require('balanced-match');\n\nmodule.exports = expandTop;\n\nvar escSlash = '\\0SLASH'+Math.random()+'\\0';\nvar escOpen = '\\0OPEN'+Math.random()+'\\0';\nvar escClose = '\\0CLOSE'+Math.random()+'\\0';\nvar escComma = '\\0COMMA'+Math.random()+'\\0';\nvar escPeriod = '\\0PERIOD'+Math.random()+'\\0';\n\nfunction numeric(str) {\n  return parseInt(str, 10) == str\n    ? parseInt(str, 10)\n    : str.charCodeAt(0);\n}\n\nfunction escapeBraces(str) {\n  return str.split('\\\\\\\\').join(escSlash)\n            .split('\\\\{').join(escOpen)\n            .split('\\\\}').join(escClose)\n            .split('\\\\,').join(escComma)\n            .split('\\\\.').join(escPeriod);\n}\n\nfunction unescapeBraces(str) {\n  return str.split(escSlash).join('\\\\')\n            .split(escOpen).join('{')\n            .split(escClose).join('}')\n            .split(escComma).join(',')\n            .split(escPeriod).join('.');\n}\n\n\n// Basically just str.split(\",\"), but handling cases\n// where we have nested braced sections, which should be\n// treated as individual members, like {a,{b,c},d}\nfunction parseCommaParts(str) {\n  if (!str)\n    return [''];\n\n  var parts = [];\n  var m = balanced('{', '}', str);\n\n  if (!m)\n    return str.split(',');\n\n  var pre = m.pre;\n  var body = m.body;\n  var post = m.post;\n  var p = pre.split(',');\n\n  p[p.length-1] += '{' + body + '}';\n  var postParts = parseCommaParts(post);\n  if (post.length) {\n    p[p.length-1] += postParts.shift();\n    p.push.apply(p, postParts);\n  }\n\n  parts.push.apply(parts, p);\n\n  return parts;\n}\n\nfunction expandTop(str) {\n  if (!str)\n    return [];\n\n  // I don't know why Bash 4.3 does this, but it does.\n  // Anything starting with {} will have the first two bytes preserved\n  // but *only* at the top level, so {},a}b will not expand to anything,\n  // but a{},b}c will be expanded to [a}c,abc].\n  // One could argue that this is a bug in Bash, but since the goal of\n  // this module is to match Bash's rules, we escape a leading {}\n  if (str.substr(0, 2) === '{}') {\n    str = '\\\\{\\\\}' + str.substr(2);\n  }\n\n  return expand(escapeBraces(str), true).map(unescapeBraces);\n}\n\nfunction identity(e) {\n  return e;\n}\n\nfunction embrace(str) {\n  return '{' + str + '}';\n}\nfunction isPadded(el) {\n  return /^-?0\\d/.test(el);\n}\n\nfunction lte(i, y) {\n  return i <= y;\n}\nfunction gte(i, y) {\n  return i >= y;\n}\n\nfunction expand(str, isTop) {\n  var expansions = [];\n\n  var m = balanced('{', '}', str);\n  if (!m || /\\$$/.test(m.pre)) return [str];\n\n  var isNumericSequence = /^-?\\d+\\.\\.-?\\d+(?:\\.\\.-?\\d+)?$/.test(m.body);\n  var isAlphaSequence = /^[a-zA-Z]\\.\\.[a-zA-Z](?:\\.\\.-?\\d+)?$/.test(m.body);\n  var isSequence = isNumericSequence || isAlphaSequence;\n  var isOptions = m.body.indexOf(',') >= 0;\n  if (!isSequence && !isOptions) {\n    // {a},b}\n    if (m.post.match(/,.*\\}/)) {\n      str = m.pre + '{' + m.body + escClose + m.post;\n      return expand(str);\n    }\n    return [str];\n  }\n\n  var n;\n  if (isSequence) {\n    n = m.body.split(/\\.\\./);\n  } else {\n    n = parseCommaParts(m.body);\n    if (n.length === 1) {\n      // x{{a,b}}y ==> x{a}y x{b}y\n      n = expand(n[0], false).map(embrace);\n      if (n.length === 1) {\n        var post = m.post.length\n          ? expand(m.post, false)\n          : [''];\n        return post.map(function(p) {\n          return m.pre + n[0] + p;\n        });\n      }\n    }\n  }\n\n  // at this point, n is the parts, and we know it's not a comma set\n  // with a single entry.\n\n  // no need to expand pre, since it is guaranteed to be free of brace-sets\n  var pre = m.pre;\n  var post = m.post.length\n    ? expand(m.post, false)\n    : [''];\n\n  var N;\n\n  if (isSequence) {\n    var x = numeric(n[0]);\n    var y = numeric(n[1]);\n    var width = Math.max(n[0].length, n[1].length)\n    var incr = n.length == 3\n      ? Math.abs(numeric(n[2]))\n      : 1;\n    var test = lte;\n    var reverse = y < x;\n    if (reverse) {\n      incr *= -1;\n      test = gte;\n    }\n    var pad = n.some(isPadded);\n\n    N = [];\n\n    for (var i = x; test(i, y); i += incr) {\n      var c;\n      if (isAlphaSequence) {\n        c = String.fromCharCode(i);\n        if (c === '\\\\')\n          c = '';\n      } else {\n        c = String(i);\n        if (pad) {\n          var need = width - c.length;\n          if (need > 0) {\n            var z = new Array(need + 1).join('0');\n            if (i < 0)\n              c = '-' + z + c.slice(1);\n            else\n              c = z + c;\n          }\n        }\n      }\n      N.push(c);\n    }\n  } else {\n    N = concatMap(n, function(el) { return expand(el, false) });\n  }\n\n  for (var j = 0; j < N.length; j++) {\n    for (var k = 0; k < post.length; k++) {\n      var expansion = pre + N[j] + post[k];\n      if (!isTop || isSequence || expansion)\n        expansions.push(expansion);\n    }\n  }\n\n  return expansions;\n}\n\n","module.exports = minimatch\nminimatch.Minimatch = Minimatch\n\nvar path = { sep: '/' }\ntry {\n  path = require('path')\n} catch (er) {}\n\nvar GLOBSTAR = minimatch.GLOBSTAR = Minimatch.GLOBSTAR = {}\nvar expand = require('brace-expansion')\n\nvar plTypes = {\n  '!': { open: '(?:(?!(?:', close: '))[^/]*?)'},\n  '?': { open: '(?:', close: ')?' },\n  '+': { open: '(?:', close: ')+' },\n  '*': { open: '(?:', close: ')*' },\n  '@': { open: '(?:', close: ')' }\n}\n\n// any single thing other than /\n// don't need to escape / when using new RegExp()\nvar qmark = '[^/]'\n\n// * => any number of characters\nvar star = qmark + '*?'\n\n// ** when dots are allowed.  Anything goes, except .. and .\n// not (^ or / followed by one or two dots followed by $ or /),\n// followed by anything, any number of times.\nvar twoStarDot = '(?:(?!(?:\\\\\\/|^)(?:\\\\.{1,2})($|\\\\\\/)).)*?'\n\n// not a ^ or / followed by a dot,\n// followed by anything, any number of times.\nvar twoStarNoDot = '(?:(?!(?:\\\\\\/|^)\\\\.).)*?'\n\n// characters that need to be escaped in RegExp.\nvar reSpecials = charSet('().*{}+?[]^$\\\\!')\n\n// \"abc\" -> { a:true, b:true, c:true }\nfunction charSet (s) {\n  return s.split('').reduce(function (set, c) {\n    set[c] = true\n    return set\n  }, {})\n}\n\n// normalizes slashes.\nvar slashSplit = /\\/+/\n\nminimatch.filter = filter\nfunction filter (pattern, options) {\n  options = options || {}\n  return function (p, i, list) {\n    return minimatch(p, pattern, options)\n  }\n}\n\nfunction ext (a, b) {\n  a = a || {}\n  b = b || {}\n  var t = {}\n  Object.keys(b).forEach(function (k) {\n    t[k] = b[k]\n  })\n  Object.keys(a).forEach(function (k) {\n    t[k] = a[k]\n  })\n  return t\n}\n\nminimatch.defaults = function (def) {\n  if (!def || !Object.keys(def).length) return minimatch\n\n  var orig = minimatch\n\n  var m = function minimatch (p, pattern, options) {\n    return orig.minimatch(p, pattern, ext(def, options))\n  }\n\n  m.Minimatch = function Minimatch (pattern, options) {\n    return new orig.Minimatch(pattern, ext(def, options))\n  }\n\n  return m\n}\n\nMinimatch.defaults = function (def) {\n  if (!def || !Object.keys(def).length) return Minimatch\n  return minimatch.defaults(def).Minimatch\n}\n\nfunction minimatch (p, pattern, options) {\n  if (typeof pattern !== 'string') {\n    throw new TypeError('glob pattern string required')\n  }\n\n  if (!options) options = {}\n\n  // shortcut: comments match nothing.\n  if (!options.nocomment && pattern.charAt(0) === '#') {\n    return false\n  }\n\n  // \"\" only matches \"\"\n  if (pattern.trim() === '') return p === ''\n\n  return new Minimatch(pattern, options).match(p)\n}\n\nfunction Minimatch (pattern, options) {\n  if (!(this instanceof Minimatch)) {\n    return new Minimatch(pattern, options)\n  }\n\n  if (typeof pattern !== 'string') {\n    throw new TypeError('glob pattern string required')\n  }\n\n  if (!options) options = {}\n  pattern = pattern.trim()\n\n  // windows support: need to use /, not \\\n  if (path.sep !== '/') {\n    pattern = pattern.split(path.sep).join('/')\n  }\n\n  this.options = options\n  this.set = []\n  this.pattern = pattern\n  this.regexp = null\n  this.negate = false\n  this.comment = false\n  this.empty = false\n\n  // make the set of regexps etc.\n  this.make()\n}\n\nMinimatch.prototype.debug = function () {}\n\nMinimatch.prototype.make = make\nfunction make () {\n  // don't do it more than once.\n  if (this._made) return\n\n  var pattern = this.pattern\n  var options = this.options\n\n  // empty patterns and comments match nothing.\n  if (!options.nocomment && pattern.charAt(0) === '#') {\n    this.comment = true\n    return\n  }\n  if (!pattern) {\n    this.empty = true\n    return\n  }\n\n  // step 1: figure out negation, etc.\n  this.parseNegate()\n\n  // step 2: expand braces\n  var set = this.globSet = this.braceExpand()\n\n  if (options.debug) this.debug = console.error\n\n  this.debug(this.pattern, set)\n\n  // step 3: now we have a set, so turn each one into a series of path-portion\n  // matching patterns.\n  // These will be regexps, except in the case of \"**\", which is\n  // set to the GLOBSTAR object for globstar behavior,\n  // and will not contain any / characters\n  set = this.globParts = set.map(function (s) {\n    return s.split(slashSplit)\n  })\n\n  this.debug(this.pattern, set)\n\n  // glob --> regexps\n  set = set.map(function (s, si, set) {\n    return s.map(this.parse, this)\n  }, this)\n\n  this.debug(this.pattern, set)\n\n  // filter out everything that didn't compile properly.\n  set = set.filter(function (s) {\n    return s.indexOf(false) === -1\n  })\n\n  this.debug(this.pattern, set)\n\n  this.set = set\n}\n\nMinimatch.prototype.parseNegate = parseNegate\nfunction parseNegate () {\n  var pattern = this.pattern\n  var negate = false\n  var options = this.options\n  var negateOffset = 0\n\n  if (options.nonegate) return\n\n  for (var i = 0, l = pattern.length\n    ; i < l && pattern.charAt(i) === '!'\n    ; i++) {\n    negate = !negate\n    negateOffset++\n  }\n\n  if (negateOffset) this.pattern = pattern.substr(negateOffset)\n  this.negate = negate\n}\n\n// Brace expansion:\n// a{b,c}d -> abd acd\n// a{b,}c -> abc ac\n// a{0..3}d -> a0d a1d a2d a3d\n// a{b,c{d,e}f}g -> abg acdfg acefg\n// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg\n//\n// Invalid sets are not expanded.\n// a{2..}b -> a{2..}b\n// a{b}c -> a{b}c\nminimatch.braceExpand = function (pattern, options) {\n  return braceExpand(pattern, options)\n}\n\nMinimatch.prototype.braceExpand = braceExpand\n\nfunction braceExpand (pattern, options) {\n  if (!options) {\n    if (this instanceof Minimatch) {\n      options = this.options\n    } else {\n      options = {}\n    }\n  }\n\n  pattern = typeof pattern === 'undefined'\n    ? this.pattern : pattern\n\n  if (typeof pattern === 'undefined') {\n    throw new TypeError('undefined pattern')\n  }\n\n  if (options.nobrace ||\n    !pattern.match(/\\{.*\\}/)) {\n    // shortcut. no need to expand.\n    return [pattern]\n  }\n\n  return expand(pattern)\n}\n\n// parse a component of the expanded set.\n// At this point, no pattern may contain \"/\" in it\n// so we're going to return a 2d array, where each entry is the full\n// pattern, split on '/', and then turned into a regular expression.\n// A regexp is made at the end which joins each array with an\n// escaped /, and another full one which joins each regexp with |.\n//\n// Following the lead of Bash 4.1, note that \"**\" only has special meaning\n// when it is the *only* thing in a path portion.  Otherwise, any series\n// of * is equivalent to a single *.  Globstar behavior is enabled by\n// default, and can be disabled by setting options.noglobstar.\nMinimatch.prototype.parse = parse\nvar SUBPARSE = {}\nfunction parse (pattern, isSub) {\n  if (pattern.length > 1024 * 64) {\n    throw new TypeError('pattern is too long')\n  }\n\n  var options = this.options\n\n  // shortcuts\n  if (!options.noglobstar && pattern === '**') return GLOBSTAR\n  if (pattern === '') return ''\n\n  var re = ''\n  var hasMagic = !!options.nocase\n  var escaping = false\n  // ? => one single character\n  var patternListStack = []\n  var negativeLists = []\n  var stateChar\n  var inClass = false\n  var reClassStart = -1\n  var classStart = -1\n  // . and .. never match anything that doesn't start with .,\n  // even when options.dot is set.\n  var patternStart = pattern.charAt(0) === '.' ? '' // anything\n  // not (start or / followed by . or .. followed by / or end)\n  : options.dot ? '(?!(?:^|\\\\\\/)\\\\.{1,2}(?:$|\\\\\\/))'\n  : '(?!\\\\.)'\n  var self = this\n\n  function clearStateChar () {\n    if (stateChar) {\n      // we had some state-tracking character\n      // that wasn't consumed by this pass.\n      switch (stateChar) {\n        case '*':\n          re += star\n          hasMagic = true\n        break\n        case '?':\n          re += qmark\n          hasMagic = true\n        break\n        default:\n          re += '\\\\' + stateChar\n        break\n      }\n      self.debug('clearStateChar %j %j', stateChar, re)\n      stateChar = false\n    }\n  }\n\n  for (var i = 0, len = pattern.length, c\n    ; (i < len) && (c = pattern.charAt(i))\n    ; i++) {\n    this.debug('%s\\t%s %s %j', pattern, i, re, c)\n\n    // skip over any that are escaped.\n    if (escaping && reSpecials[c]) {\n      re += '\\\\' + c\n      escaping = false\n      continue\n    }\n\n    switch (c) {\n      case '/':\n        // completely not allowed, even escaped.\n        // Should already be path-split by now.\n        return false\n\n      case '\\\\':\n        clearStateChar()\n        escaping = true\n      continue\n\n      // the various stateChar values\n      // for the \"extglob\" stuff.\n      case '?':\n      case '*':\n      case '+':\n      case '@':\n      case '!':\n        this.debug('%s\\t%s %s %j <-- stateChar', pattern, i, re, c)\n\n        // all of those are literals inside a class, except that\n        // the glob [!a] means [^a] in regexp\n        if (inClass) {\n          this.debug('  in class')\n          if (c === '!' && i === classStart + 1) c = '^'\n          re += c\n          continue\n        }\n\n        // if we already have a stateChar, then it means\n        // that there was something like ** or +? in there.\n        // Handle the stateChar, then proceed with this one.\n        self.debug('call clearStateChar %j', stateChar)\n        clearStateChar()\n        stateChar = c\n        // if extglob is disabled, then +(asdf|foo) isn't a thing.\n        // just clear the statechar *now*, rather than even diving into\n        // the patternList stuff.\n        if (options.noext) clearStateChar()\n      continue\n\n      case '(':\n        if (inClass) {\n          re += '('\n          continue\n        }\n\n        if (!stateChar) {\n          re += '\\\\('\n          continue\n        }\n\n        patternListStack.push({\n          type: stateChar,\n          start: i - 1,\n          reStart: re.length,\n          open: plTypes[stateChar].open,\n          close: plTypes[stateChar].close\n        })\n        // negation is (?:(?!js)[^/]*)\n        re += stateChar === '!' ? '(?:(?!(?:' : '(?:'\n        this.debug('plType %j %j', stateChar, re)\n        stateChar = false\n      continue\n\n      case ')':\n        if (inClass || !patternListStack.length) {\n          re += '\\\\)'\n          continue\n        }\n\n        clearStateChar()\n        hasMagic = true\n        var pl = patternListStack.pop()\n        // negation is (?:(?!js)[^/]*)\n        // The others are (?:<pattern>)<type>\n        re += pl.close\n        if (pl.type === '!') {\n          negativeLists.push(pl)\n        }\n        pl.reEnd = re.length\n      continue\n\n      case '|':\n        if (inClass || !patternListStack.length || escaping) {\n          re += '\\\\|'\n          escaping = false\n          continue\n        }\n\n        clearStateChar()\n        re += '|'\n      continue\n\n      // these are mostly the same in regexp and glob\n      case '[':\n        // swallow any state-tracking char before the [\n        clearStateChar()\n\n        if (inClass) {\n          re += '\\\\' + c\n          continue\n        }\n\n        inClass = true\n        classStart = i\n        reClassStart = re.length\n        re += c\n      continue\n\n      case ']':\n        //  a right bracket shall lose its special\n        //  meaning and represent itself in\n        //  a bracket expression if it occurs\n        //  first in the list.  -- POSIX.2 2.8.3.2\n        if (i === classStart + 1 || !inClass) {\n          re += '\\\\' + c\n          escaping = false\n          continue\n        }\n\n        // handle the case where we left a class open.\n        // \"[z-a]\" is valid, equivalent to \"\\[z-a\\]\"\n        if (inClass) {\n          // split where the last [ was, make sure we don't have\n          // an invalid re. if so, re-walk the contents of the\n          // would-be class to re-translate any characters that\n          // were passed through as-is\n          // TODO: It would probably be faster to determine this\n          // without a try/catch and a new RegExp, but it's tricky\n          // to do safely.  For now, this is safe and works.\n          var cs = pattern.substring(classStart + 1, i)\n          try {\n            RegExp('[' + cs + ']')\n          } catch (er) {\n            // not a valid class!\n            var sp = this.parse(cs, SUBPARSE)\n            re = re.substr(0, reClassStart) + '\\\\[' + sp[0] + '\\\\]'\n            hasMagic = hasMagic || sp[1]\n            inClass = false\n            continue\n          }\n        }\n\n        // finish up the class.\n        hasMagic = true\n        inClass = false\n        re += c\n      continue\n\n      default:\n        // swallow any state char that wasn't consumed\n        clearStateChar()\n\n        if (escaping) {\n          // no need\n          escaping = false\n        } else if (reSpecials[c]\n          && !(c === '^' && inClass)) {\n          re += '\\\\'\n        }\n\n        re += c\n\n    } // switch\n  } // for\n\n  // handle the case where we left a class open.\n  // \"[abc\" is valid, equivalent to \"\\[abc\"\n  if (inClass) {\n    // split where the last [ was, and escape it\n    // this is a huge pita.  We now have to re-walk\n    // the contents of the would-be class to re-translate\n    // any characters that were passed through as-is\n    cs = pattern.substr(classStart + 1)\n    sp = this.parse(cs, SUBPARSE)\n    re = re.substr(0, reClassStart) + '\\\\[' + sp[0]\n    hasMagic = hasMagic || sp[1]\n  }\n\n  // handle the case where we had a +( thing at the *end*\n  // of the pattern.\n  // each pattern list stack adds 3 chars, and we need to go through\n  // and escape any | chars that were passed through as-is for the regexp.\n  // Go through and escape them, taking care not to double-escape any\n  // | chars that were already escaped.\n  for (pl = patternListStack.pop(); pl; pl = patternListStack.pop()) {\n    var tail = re.slice(pl.reStart + pl.open.length)\n    this.debug('setting tail', re, pl)\n    // maybe some even number of \\, then maybe 1 \\, followed by a |\n    tail = tail.replace(/((?:\\\\{2}){0,64})(\\\\?)\\|/g, function (_, $1, $2) {\n      if (!$2) {\n        // the | isn't already escaped, so escape it.\n        $2 = '\\\\'\n      }\n\n      // need to escape all those slashes *again*, without escaping the\n      // one that we need for escaping the | character.  As it works out,\n      // escaping an even number of slashes can be done by simply repeating\n      // it exactly after itself.  That's why this trick works.\n      //\n      // I am sorry that you have to see this.\n      return $1 + $1 + $2 + '|'\n    })\n\n    this.debug('tail=%j\\n   %s', tail, tail, pl, re)\n    var t = pl.type === '*' ? star\n      : pl.type === '?' ? qmark\n      : '\\\\' + pl.type\n\n    hasMagic = true\n    re = re.slice(0, pl.reStart) + t + '\\\\(' + tail\n  }\n\n  // handle trailing things that only matter at the very end.\n  clearStateChar()\n  if (escaping) {\n    // trailing \\\\\n    re += '\\\\\\\\'\n  }\n\n  // only need to apply the nodot start if the re starts with\n  // something that could conceivably capture a dot\n  var addPatternStart = false\n  switch (re.charAt(0)) {\n    case '.':\n    case '[':\n    case '(': addPatternStart = true\n  }\n\n  // Hack to work around lack of negative lookbehind in JS\n  // A pattern like: *.!(x).!(y|z) needs to ensure that a name\n  // like 'a.xyz.yz' doesn't match.  So, the first negative\n  // lookahead, has to look ALL the way ahead, to the end of\n  // the pattern.\n  for (var n = negativeLists.length - 1; n > -1; n--) {\n    var nl = negativeLists[n]\n\n    var nlBefore = re.slice(0, nl.reStart)\n    var nlFirst = re.slice(nl.reStart, nl.reEnd - 8)\n    var nlLast = re.slice(nl.reEnd - 8, nl.reEnd)\n    var nlAfter = re.slice(nl.reEnd)\n\n    nlLast += nlAfter\n\n    // Handle nested stuff like *(*.js|!(*.json)), where open parens\n    // mean that we should *not* include the ) in the bit that is considered\n    // \"after\" the negated section.\n    var openParensBefore = nlBefore.split('(').length - 1\n    var cleanAfter = nlAfter\n    for (i = 0; i < openParensBefore; i++) {\n      cleanAfter = cleanAfter.replace(/\\)[+*?]?/, '')\n    }\n    nlAfter = cleanAfter\n\n    var dollar = ''\n    if (nlAfter === '' && isSub !== SUBPARSE) {\n      dollar = '$'\n    }\n    var newRe = nlBefore + nlFirst + nlAfter + dollar + nlLast\n    re = newRe\n  }\n\n  // if the re is not \"\" at this point, then we need to make sure\n  // it doesn't match against an empty path part.\n  // Otherwise a/* will match a/, which it should not.\n  if (re !== '' && hasMagic) {\n    re = '(?=.)' + re\n  }\n\n  if (addPatternStart) {\n    re = patternStart + re\n  }\n\n  // parsing just a piece of a larger pattern.\n  if (isSub === SUBPARSE) {\n    return [re, hasMagic]\n  }\n\n  // skip the regexp for non-magical patterns\n  // unescape anything in it, though, so that it'll be\n  // an exact match against a file etc.\n  if (!hasMagic) {\n    return globUnescape(pattern)\n  }\n\n  var flags = options.nocase ? 'i' : ''\n  try {\n    var regExp = new RegExp('^' + re + '$', flags)\n  } catch (er) {\n    // If it was an invalid regular expression, then it can't match\n    // anything.  This trick looks for a character after the end of\n    // the string, which is of course impossible, except in multi-line\n    // mode, but it's not a /m regex.\n    return new RegExp('$.')\n  }\n\n  regExp._glob = pattern\n  regExp._src = re\n\n  return regExp\n}\n\nminimatch.makeRe = function (pattern, options) {\n  return new Minimatch(pattern, options || {}).makeRe()\n}\n\nMinimatch.prototype.makeRe = makeRe\nfunction makeRe () {\n  if (this.regexp || this.regexp === false) return this.regexp\n\n  // at this point, this.set is a 2d array of partial\n  // pattern strings, or \"**\".\n  //\n  // It's better to use .match().  This function shouldn't\n  // be used, really, but it's pretty convenient sometimes,\n  // when you just want to work with a regex.\n  var set = this.set\n\n  if (!set.length) {\n    this.regexp = false\n    return this.regexp\n  }\n  var options = this.options\n\n  var twoStar = options.noglobstar ? star\n    : options.dot ? twoStarDot\n    : twoStarNoDot\n  var flags = options.nocase ? 'i' : ''\n\n  var re = set.map(function (pattern) {\n    return pattern.map(function (p) {\n      return (p === GLOBSTAR) ? twoStar\n      : (typeof p === 'string') ? regExpEscape(p)\n      : p._src\n    }).join('\\\\\\/')\n  }).join('|')\n\n  // must match entire pattern\n  // ending in a * or ** will make it less strict.\n  re = '^(?:' + re + ')$'\n\n  // can match anything, as long as it's not this.\n  if (this.negate) re = '^(?!' + re + ').*$'\n\n  try {\n    this.regexp = new RegExp(re, flags)\n  } catch (ex) {\n    this.regexp = false\n  }\n  return this.regexp\n}\n\nminimatch.match = function (list, pattern, options) {\n  options = options || {}\n  var mm = new Minimatch(pattern, options)\n  list = list.filter(function (f) {\n    return mm.match(f)\n  })\n  if (mm.options.nonull && !list.length) {\n    list.push(pattern)\n  }\n  return list\n}\n\nMinimatch.prototype.match = match\nfunction match (f, partial) {\n  this.debug('match', f, this.pattern)\n  // short-circuit in the case of busted things.\n  // comments, etc.\n  if (this.comment) return false\n  if (this.empty) return f === ''\n\n  if (f === '/' && partial) return true\n\n  var options = this.options\n\n  // windows: need to use /, not \\\n  if (path.sep !== '/') {\n    f = f.split(path.sep).join('/')\n  }\n\n  // treat the test path as a set of pathparts.\n  f = f.split(slashSplit)\n  this.debug(this.pattern, 'split', f)\n\n  // just ONE of the pattern sets in this.set needs to match\n  // in order for it to be valid.  If negating, then just one\n  // match means that we have failed.\n  // Either way, return on the first hit.\n\n  var set = this.set\n  this.debug(this.pattern, 'set', set)\n\n  // Find the basename of the path by looking for the last non-empty segment\n  var filename\n  var i\n  for (i = f.length - 1; i >= 0; i--) {\n    filename = f[i]\n    if (filename) break\n  }\n\n  for (i = 0; i < set.length; i++) {\n    var pattern = set[i]\n    var file = f\n    if (options.matchBase && pattern.length === 1) {\n      file = [filename]\n    }\n    var hit = this.matchOne(file, pattern, partial)\n    if (hit) {\n      if (options.flipNegate) return true\n      return !this.negate\n    }\n  }\n\n  // didn't get any hits.  this is success if it's a negative\n  // pattern, failure otherwise.\n  if (options.flipNegate) return false\n  return this.negate\n}\n\n// set partial to true to test if, for example,\n// \"/a/b\" matches the start of \"/*/b/*/d\"\n// Partial means, if you run out of file before you run\n// out of pattern, then that's fine, as long as all\n// the parts match.\nMinimatch.prototype.matchOne = function (file, pattern, partial) {\n  var options = this.options\n\n  this.debug('matchOne',\n    { 'this': this, file: file, pattern: pattern })\n\n  this.debug('matchOne', file.length, pattern.length)\n\n  for (var fi = 0,\n      pi = 0,\n      fl = file.length,\n      pl = pattern.length\n      ; (fi < fl) && (pi < pl)\n      ; fi++, pi++) {\n    this.debug('matchOne loop')\n    var p = pattern[pi]\n    var f = file[fi]\n\n    this.debug(pattern, p, f)\n\n    // should be impossible.\n    // some invalid regexp stuff in the set.\n    if (p === false) return false\n\n    if (p === GLOBSTAR) {\n      this.debug('GLOBSTAR', [pattern, p, f])\n\n      // \"**\"\n      // a/**/b/**/c would match the following:\n      // a/b/x/y/z/c\n      // a/x/y/z/b/c\n      // a/b/x/b/x/c\n      // a/b/c\n      // To do this, take the rest of the pattern after\n      // the **, and see if it would match the file remainder.\n      // If so, return success.\n      // If not, the ** \"swallows\" a segment, and try again.\n      // This is recursively awful.\n      //\n      // a/**/b/**/c matching a/b/x/y/z/c\n      // - a matches a\n      // - doublestar\n      //   - matchOne(b/x/y/z/c, b/**/c)\n      //     - b matches b\n      //     - doublestar\n      //       - matchOne(x/y/z/c, c) -> no\n      //       - matchOne(y/z/c, c) -> no\n      //       - matchOne(z/c, c) -> no\n      //       - matchOne(c, c) yes, hit\n      var fr = fi\n      var pr = pi + 1\n      if (pr === pl) {\n        this.debug('** at the end')\n        // a ** at the end will just swallow the rest.\n        // We have found a match.\n        // however, it will not swallow /.x, unless\n        // options.dot is set.\n        // . and .. are *never* matched by **, for explosively\n        // exponential reasons.\n        for (; fi < fl; fi++) {\n          if (file[fi] === '.' || file[fi] === '..' ||\n            (!options.dot && file[fi].charAt(0) === '.')) return false\n        }\n        return true\n      }\n\n      // ok, let's see if we can swallow whatever we can.\n      while (fr < fl) {\n        var swallowee = file[fr]\n\n        this.debug('\\nglobstar while', file, fr, pattern, pr, swallowee)\n\n        // XXX remove this slice.  Just pass the start index.\n        if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {\n          this.debug('globstar found match!', fr, fl, swallowee)\n          // found a match.\n          return true\n        } else {\n          // can't swallow \".\" or \"..\" ever.\n          // can only swallow \".foo\" when explicitly asked.\n          if (swallowee === '.' || swallowee === '..' ||\n            (!options.dot && swallowee.charAt(0) === '.')) {\n            this.debug('dot detected!', file, fr, pattern, pr)\n            break\n          }\n\n          // ** swallows a segment, and continue.\n          this.debug('globstar swallow a segment, and continue')\n          fr++\n        }\n      }\n\n      // no match was found.\n      // However, in partial mode, we can't say this is necessarily over.\n      // If there's more *pattern* left, then\n      if (partial) {\n        // ran out of file\n        this.debug('\\n>>> no match, partial?', file, fr, pattern, pr)\n        if (fr === fl) return true\n      }\n      return false\n    }\n\n    // something other than **\n    // non-magic patterns just have to match exactly\n    // patterns with magic have been turned into regexps.\n    var hit\n    if (typeof p === 'string') {\n      if (options.nocase) {\n        hit = f.toLowerCase() === p.toLowerCase()\n      } else {\n        hit = f === p\n      }\n      this.debug('string match', p, f, hit)\n    } else {\n      hit = f.match(p)\n      this.debug('pattern match', p, f, hit)\n    }\n\n    if (!hit) return false\n  }\n\n  // Note: ending in / means that we'll get a final \"\"\n  // at the end of the pattern.  This can only match a\n  // corresponding \"\" at the end of the file.\n  // If the file ends in /, then it can only match a\n  // a pattern that ends in /, unless the pattern just\n  // doesn't have any more for it. But, a/b/ should *not*\n  // match \"a/b/*\", even though \"\" matches against the\n  // [^/]*? pattern, except in partial mode, where it might\n  // simply not be reached yet.\n  // However, a/b/ should still satisfy a/*\n\n  // now either we fell off the end of the pattern, or we're done.\n  if (fi === fl && pi === pl) {\n    // ran out of pattern and filename at the same time.\n    // an exact hit!\n    return true\n  } else if (fi === fl) {\n    // ran out of file, but still had pattern left.\n    // this is ok if we're doing the match as part of\n    // a glob fs traversal.\n    return partial\n  } else if (pi === pl) {\n    // ran out of pattern, still have file left.\n    // this is only acceptable if we're on the very last\n    // empty segment of a file with a trailing slash.\n    // a/* should match a/b/\n    var emptyFileEnd = (fi === fl - 1) && (file[fi] === '')\n    return emptyFileEnd\n  }\n\n  // should be unreachable.\n  throw new Error('wtf?')\n}\n\n// replace stuff like \\* with *\nfunction globUnescape (s) {\n  return s.replace(/\\\\(.)/g, '$1')\n}\n\nfunction regExpEscape (s) {\n  return s.replace(/[-[\\]{}()*+?.,\\\\^$|#\\s]/g, '\\\\$&')\n}\n","var Path = require('../path.js');\nvar Errors = require('../errors.js');\nvar Environment = require('./environment.js');\nvar async = require('../../lib/async.js');\nvar Encoding = require('../encoding.js');\nvar minimatch = require('minimatch');\n\nfunction Shell(fs, options) {\n  options = options || {};\n\n  var env = new Environment(options.env);\n  var cwd = '/';\n\n  /**\n   * The bound FileSystem (cannot be changed)\n   */\n  Object.defineProperty(this, 'fs', {\n    get: function() { return fs; },\n    enumerable: true\n  });\n\n  /**\n   * The shell's environment (e.g., for things like\n   * path, tmp, and other env vars). Use env.get()\n   * and env.set() to work with variables.\n   */\n  Object.defineProperty(this, 'env', {\n    get: function() { return env; },\n    enumerable: true\n  });\n\n  /**\n   * Change the current working directory. We\n   * include `cd` on the `this` vs. proto so that\n   * we can access cwd without exposing it externally.\n   */\n  this.cd = function(path, callback) {\n    path = Path.resolve(cwd, path);\n    // Make sure the path actually exists, and is a dir\n    fs.stat(path, function(err, stats) {\n      if(err) {\n        callback(new Errors.ENOTDIR(null, path));\n        return;\n      }\n      if(stats.type === 'DIRECTORY') {\n        cwd = path;\n        callback();\n      } else {\n        callback(new Errors.ENOTDIR(null, path));\n      }\n    });\n  };\n\n  /**\n   * Get the current working directory (changed with `cd()`)\n   */\n  this.pwd = function() {\n    return cwd;\n  };\n}\n\n/**\n * Execute the .js command located at `path`. Such commands\n * should assume the existence of 3 arguments, which will be\n * defined at runtime:\n *\n *   * fs - the current shell's bound filesystem object\n *   * args - a list of arguments for the command, or an empty list if none\n *   * callback - a callback function(error, result) to call when done.\n *\n * The .js command's contents should be the body of a function\n * that looks like this:\n *\n * function(fs, args, callback) {\n *   // .js code here\n * }\n */\nShell.prototype.exec = function(path, args, callback) {\n  /* jshint evil:true */\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof args === 'function') {\n    callback = args;\n    args = [];\n  }\n  args = args || [];\n  callback = callback || function(){};\n  path = Path.resolve(sh.pwd(), path);\n\n  fs.readFile(path, \"utf8\", function(error, data) {\n    if(error) {\n      callback(error);\n      return;\n    }\n    try {\n      var cmd = new Function('fs', 'args', 'callback', data);\n      cmd(fs, args, callback);\n    } catch(e) {\n      callback(e);\n    }\n  });\n};\n\n/**\n * Create a file if it does not exist, or update access and\n * modified times if it does. Valid options include:\n *\n *  * updateOnly - whether to create the file if missing (defaults to false)\n *  * date - use the provided Date value instead of current date/time\n */\nShell.prototype.touch = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n  path = Path.resolve(sh.pwd(), path);\n\n  function createFile(path) {\n    fs.writeFile(path, '', callback);\n  }\n\n  function updateTimes(path) {\n    var now = Date.now();\n    var atime = options.date || now;\n    var mtime = options.date || now;\n\n    fs.utimes(path, atime, mtime, callback);\n  }\n\n  fs.stat(path, function(error, stats) {\n    if(error) {\n      if(options.updateOnly === true) {\n        callback();\n      } else {\n        createFile(path);\n      }\n    } else {\n      updateTimes(path);\n    }\n  });\n};\n\n/**\n * Concatenate multiple files into a single String, with each\n * file separated by a newline. The `files` argument should\n * be a String (path to single file) or an Array of Strings\n * (multiple file paths).\n */\nShell.prototype.cat = function(files, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  var all = '';\n  callback = callback || function(){};\n\n  if(!files) {\n    callback(new Errors.EINVAL('Missing files argument'));\n    return;\n  }\n\n  files = typeof files === 'string' ? [ files ] : files;\n\n  function append(item, callback) {\n    var filename = Path.resolve(sh.pwd(), item);\n    fs.readFile(filename, 'utf8', function(error, data) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      all += data + '\\n';\n      callback();\n    });\n  }\n\n  async.eachSeries(files, append, function(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, all.replace(/\\n$/, ''));\n    }\n  });\n};\n\n/**\n * Get the listing of a directory, returning an array of\n * file entries in the following form:\n *\n * {\n *   path: <String> the basename of the directory entry\n *   links: <Number> the number of links to the entry\n *   size: <Number> the size in bytes of the entry\n *   modified: <Number> the last modified date/time\n *   type: <String> the type of the entry\n *   contents: <Array> an optional array of child entries\n * }\n *\n * By default ls() gives a shallow listing. If you want\n * to follow directories as they are encountered, use\n * the `recursive=true` option.\n */\nShell.prototype.ls = function(dir, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  if(!dir) {\n    callback(new Errors.EINVAL('Missing dir argument'));\n    return;\n  }\n\n  function list(path, callback) {\n    var pathname = Path.resolve(sh.pwd(), path);\n    var result = [];\n\n    fs.readdir(pathname, function(error, entries) {\n      if(error) {\n        callback(error);\n        return;\n      }\n\n      function getDirEntry(name, callback) {\n        name = Path.join(pathname, name);\n        fs.stat(name, function(error, stats) {\n          if(error) {\n            callback(error);\n            return;\n          }\n          var entry = {\n            path: Path.basename(name),\n            links: stats.nlinks,\n            size: stats.size,\n            modified: stats.mtime,\n            type: stats.type\n          };\n\n          if(options.recursive && stats.type === 'DIRECTORY') {\n            list(Path.join(pathname, entry.path), function(error, items) {\n              if(error) {\n                callback(error);\n                return;\n              }\n              entry.contents = items;\n              result.push(entry);\n              callback();\n            });\n          } else {\n            result.push(entry);\n            callback();\n          }\n        });\n      }\n\n      async.eachSeries(entries, getDirEntry, function(error) {\n        callback(error, result);\n      });\n    });\n  }\n\n  list(dir, callback);\n};\n\n/**\n * Removes the file or directory at `path`. If `path` is a file\n * it will be removed. If `path` is a directory, it will be\n * removed if it is empty, otherwise the callback will receive\n * an error. In order to remove non-empty directories, use the\n * `recursive=true` option.\n */\nShell.prototype.rm = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n\n  function remove(pathname, callback) {\n    pathname = Path.resolve(sh.pwd(), pathname);\n    fs.stat(pathname, function(error, stats) {\n      if(error) {\n        callback(error);\n        return;\n      }\n\n      // If this is a file, delete it and we're done\n      if(stats.type === 'FILE') {\n        fs.unlink(pathname, callback);\n        return;\n      }\n\n      // If it's a dir, check if it's empty\n      fs.readdir(pathname, function(error, entries) {\n        if(error) {\n          callback(error);\n          return;\n        }\n\n        // If dir is empty, delete it and we're done\n        if(entries.length === 0) {\n          fs.rmdir(pathname, callback);\n          return;\n        }\n\n        // If not, see if we're allowed to delete recursively\n        if(!options.recursive) {\n          callback(new Errors.ENOTEMPTY(null, pathname));\n          return;\n        }\n\n        // Remove each dir entry recursively, then delete the dir.\n        entries = entries.map(function(filename) {\n          // Root dir entries absolutely\n          return Path.join(pathname, filename);\n        });\n        async.eachSeries(entries, remove, function(error) {\n          if(error) {\n            callback(error);\n            return;\n          }\n          fs.rmdir(pathname, callback);\n        });\n      });\n    });\n  }\n\n  remove(path, callback);\n};\n\n/**\n * Gets the path to the temporary directory, creating it if not\n * present. The directory used is the one specified in\n * env.TMP. The callback receives (error, tempDirName).\n */\nShell.prototype.tempDir = function(callback) {\n  var sh = this;\n  var fs = sh.fs;\n  var tmp = sh.env.get('TMP');\n  callback = callback || function(){};\n\n  // Try and create it, and it will either work or fail\n  // but either way it's now there.\n  fs.mkdir(tmp, function(err) {\n    callback(null, tmp);\n  });\n};\n\n/**\n * Recursively creates the directory at `path`. If the parent\n * of `path` does not exist, it will be created.\n * Based off EnsureDir by Sam X. Xu\n * https://www.npmjs.org/package/ensureDir\n * MIT License\n */\nShell.prototype.mkdirp = function(path, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  callback = callback || function(){};\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n  else if (path === '/') {\n    callback();\n    return;\n  }\n  function _mkdirp(path, callback) {\n    fs.stat(path, function (err, stat) {\n      if(stat) {\n        if(stat.isDirectory()) {\n          callback();\n          return;\n        }\n        else if (stat.isFile()) {\n          callback(new Errors.ENOTDIR(null, path));\n          return;\n        }\n      }\n      else if (err && err.code !== 'ENOENT') {\n        callback(err);\n        return;\n      }\n      else {\n        var parent = Path.dirname(path);\n        if(parent === '/') {\n          fs.mkdir(path, function (err) {\n            if (err && err.code != 'EEXIST') {\n              callback(err);\n              return;\n            }\n            callback();\n            return;\n          });\n        }\n        else {\n          _mkdirp(parent, function (err) {\n            if (err) return callback(err);\n            fs.mkdir(path, function (err) {\n              if (err && err.code != 'EEXIST') {\n                callback(err);\n                return;\n              }\n              callback();\n              return;\n            });\n          });\n        }\n      }\n    });\n  }\n\n  _mkdirp(path, callback);\n};\n\n/**\n * Recursively walk a directory tree, reporting back all paths\n * that were found along the way. The `path` must be a dir.\n * Valid options include a `regex` for pattern matching paths\n * and an `exec` function of the form `function(path, next)` where\n * `path` is the current path that was found (dir paths have an '/'\n * appended) and `next` is a callback to call when done processing\n * the current path, passing any error object back as the first argument.\n * `find` returns a flat array of absolute paths for all matching/found\n * paths as the final argument to the callback.\n */\n Shell.prototype.find = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  var exec = options.exec || function(path, next) { next(); };\n  var found = [];\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n\n  function processPath(path, callback) {\n    exec(path, function(err) {\n      if(err) {\n        callback(err);\n        return;\n      }\n\n      found.push(path);\n      callback();\n    });\n  }\n\n  function maybeProcessPath(path, callback) {\n    // Test the path against the user's regex, name, path primaries (if any)\n    // and remove any trailing slashes added previously.\n    var rawPath = Path.removeTrailing(path);\n\n    // Check entire path against provided regex, if any\n    if(options.regex && !options.regex.test(rawPath)) {\n      callback();\n      return;\n    }\n\n    // Check basename for matches against name primary, if any\n    if(options.name && !minimatch(Path.basename(rawPath), options.name)) {\n      callback();\n      return;\n    }\n\n    // Check dirname for matches against path primary, if any\n    if(options.path && !minimatch(Path.dirname(rawPath), options.path)) {\n      callback();\n      return;\n    }\n\n    processPath(path, callback);\n  }\n\n  function walk(path, callback) {\n    path = Path.resolve(sh.pwd(), path);\n\n    // The path is either a file or dir, and instead of doing\n    // a stat() to determine it first, we just try to readdir()\n    // and it will either work or not, and we handle the non-dir error.\n    fs.readdir(path, function(err, entries) {\n      if(err) {\n        if(err.code === 'ENOTDIR' /* file case, ignore error */) {\n          maybeProcessPath(path, callback);\n        } else {\n          callback(err);\n        }\n        return;\n      }\n\n      // Path is really a dir, add a trailing / and report it found\n      maybeProcessPath(Path.addTrailing(path), function(err) {\n        if(err) {\n          callback(err);\n          return;\n        }\n\n        entries = entries.map(function(entry) {\n          return Path.join(path, entry);\n        });\n\n        async.eachSeries(entries, walk, function(err) {\n          callback(err, found);\n        });\n      });\n    });\n  }\n\n  // Make sure we are starting with a dir path\n  fs.stat(path, function(err, stats) {\n    if(err) {\n      callback(err);\n      return;\n    }\n    if(!stats.isDirectory()) {\n      callback(new Errors.ENOTDIR(null, path));\n      return;\n    }\n\n    walk(path, callback);\n  });\n};\n\nmodule.exports = Shell;\n","// Based on https://github.com/diy/intercom.js/blob/master/lib/events.js\n// Copyright 2012 DIY Co Apache License, Version 2.0\n// http://www.apache.org/licenses/LICENSE-2.0\n\nfunction removeItem(item, array) {\n  for (var i = array.length - 1; i >= 0; i--) {\n    if (array[i] === item) {\n      array.splice(i, 1);\n    }\n  }\n  return array;\n}\n\nvar EventEmitter = function() {};\n\nEventEmitter.createInterface = function(space) {\n  var methods = {};\n\n  methods.on = function(name, fn) {\n    if (typeof this[space] === 'undefined') {\n      this[space] = {};\n    }\n    if (!this[space].hasOwnProperty(name)) {\n      this[space][name] = [];\n    }\n    this[space][name].push(fn);\n  };\n\n  methods.off = function(name, fn) {\n    if (typeof this[space] === 'undefined') return;\n    if (this[space].hasOwnProperty(name)) {\n      removeItem(fn, this[space][name]);\n    }\n  };\n\n  methods.trigger = function(name) {\n    if (typeof this[space] !== 'undefined' && this[space].hasOwnProperty(name)) {\n      var args = Array.prototype.slice.call(arguments, 1);\n      for (var i = 0; i < this[space][name].length; i++) {\n        this[space][name][i].apply(this[space][name][i], args);\n      }\n    }\n  };\n\n  methods.removeAllListeners = function(name) {\n    if (typeof this[space] === 'undefined') return;\n    var self = this;\n    self[space][name].forEach(function(fn) {\n      self.off(name, fn);\n    });\n  };\n\n  return methods;\n};\n\nvar pvt = EventEmitter.createInterface('_handlers');\nEventEmitter.prototype._on = pvt.on;\nEventEmitter.prototype._off = pvt.off;\nEventEmitter.prototype._trigger = pvt.trigger;\n\nvar pub = EventEmitter.createInterface('handlers');\nEventEmitter.prototype.on = function() {\n  pub.on.apply(this, arguments);\n  Array.prototype.unshift.call(arguments, 'on');\n  this._trigger.apply(this, arguments);\n};\nEventEmitter.prototype.off = pub.off;\nEventEmitter.prototype.trigger = pub.trigger;\nEventEmitter.prototype.removeAllListeners = pub.removeAllListeners;\n\nmodule.exports = EventEmitter;\n","// Based on https://github.com/diy/intercom.js/blob/master/lib/intercom.js\n// Copyright 2012 DIY Co Apache License, Version 2.0\n// http://www.apache.org/licenses/LICENSE-2.0\n\nvar EventEmitter = require('./eventemitter.js');\nvar guid = require('../src/shared.js').guid;\n\nfunction throttle(delay, fn) {\n  var last = 0;\n  return function() {\n    var now = Date.now();\n    if (now - last > delay) {\n      last = now;\n      fn.apply(this, arguments);\n    }\n  };\n}\n\nfunction extend(a, b) {\n  if (typeof a === 'undefined' || !a) { a = {}; }\n  if (typeof b === 'object') {\n    for (var key in b) {\n      if (b.hasOwnProperty(key)) {\n        a[key] = b[key];\n      }\n    }\n  }\n  return a;\n}\n\nvar localStorage = (function(window) {\n  if (typeof window === 'undefined' ||\n      typeof window.localStorage === 'undefined') {\n    return {\n      getItem : function() {},\n      setItem : function() {},\n      removeItem : function() {}\n    };\n  }\n  return window.localStorage;\n}(global));\n\nfunction Intercom() {\n  var self = this;\n  var now = Date.now();\n\n  this.origin         = guid();\n  this.lastMessage    = now;\n  this.receivedIDs    = {};\n  this.previousValues = {};\n\n  var storageHandler = function() {\n    self._onStorageEvent.apply(self, arguments);\n  };\n\n  // If we're in node.js, skip event registration\n  if (typeof document === 'undefined') {\n    return;\n  }\n\n  if (document.attachEvent) {\n    document.attachEvent('onstorage', storageHandler);\n  } else {\n    global.addEventListener('storage', storageHandler, false);\n  }\n}\n\nIntercom.prototype._transaction = function(fn) {\n  var TIMEOUT   = 1000;\n  var WAIT      = 20;\n  var self      = this;\n  var executed  = false;\n  var listening = false;\n  var waitTimer = null;\n\n  function lock() {\n    if (executed) {\n      return;\n    }\n\n    var now = Date.now();\n    var activeLock = localStorage.getItem(INDEX_LOCK)|0;\n    if (activeLock && now - activeLock < TIMEOUT) {\n      if (!listening) {\n        self._on('storage', lock);\n        listening = true;\n      }\n      waitTimer = setTimeout(lock, WAIT);\n      return;\n    }\n    executed = true;\n    localStorage.setItem(INDEX_LOCK, now);\n\n    fn();\n    unlock();\n  }\n\n  function unlock() {\n    if (listening) {\n      self._off('storage', lock);\n    }\n    if (waitTimer) {\n      clearTimeout(waitTimer);\n    }\n    localStorage.removeItem(INDEX_LOCK);\n  }\n\n  lock();\n};\n\nIntercom.prototype._cleanup_emit = throttle(100, function() {\n  var self = this;\n\n  self._transaction(function() {\n    var now = Date.now();\n    var threshold = now - THRESHOLD_TTL_EMIT;\n    var changed = 0;\n    var messages;\n\n    try {\n      messages = JSON.parse(localStorage.getItem(INDEX_EMIT) || '[]');\n    } catch(e) {\n      messages = [];\n    }\n    for (var i = messages.length - 1; i >= 0; i--) {\n      if (messages[i].timestamp < threshold) {\n        messages.splice(i, 1);\n        changed++;\n      }\n    }\n    if (changed > 0) {\n      localStorage.setItem(INDEX_EMIT, JSON.stringify(messages));\n    }\n  });\n});\n\nIntercom.prototype._cleanup_once = throttle(100, function() {\n  var self = this;\n\n  self._transaction(function() {\n    var timestamp, ttl, key;\n    var table;\n    var now  = Date.now();\n    var changed = 0;\n\n    try {\n      table = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');\n    } catch(e) {\n      table = {};\n    }\n    for (key in table) {\n      if (self._once_expired(key, table)) {\n        delete table[key];\n        changed++;\n      }\n    }\n\n    if (changed > 0) {\n      localStorage.setItem(INDEX_ONCE, JSON.stringify(table));\n    }\n  });\n});\n\nIntercom.prototype._once_expired = function(key, table) {\n  if (!table) {\n    return true;\n  }\n  if (!table.hasOwnProperty(key)) {\n    return true;\n  }\n  if (typeof table[key] !== 'object') {\n    return true;\n  }\n\n  var ttl = table[key].ttl || THRESHOLD_TTL_ONCE;\n  var now = Date.now();\n  var timestamp = table[key].timestamp;\n  return timestamp < now - ttl;\n};\n\nIntercom.prototype._localStorageChanged = function(event, field) {\n  if (event && event.key) {\n    return event.key === field;\n  }\n\n  var currentValue = localStorage.getItem(field);\n  if (currentValue === this.previousValues[field]) {\n    return false;\n  }\n  this.previousValues[field] = currentValue;\n  return true;\n};\n\nIntercom.prototype._onStorageEvent = function(event) {\n  event = event || global.event;\n  var self = this;\n\n  if (this._localStorageChanged(event, INDEX_EMIT)) {\n    this._transaction(function() {\n      var now = Date.now();\n      var data = localStorage.getItem(INDEX_EMIT);\n      var messages;\n\n      try {\n        messages = JSON.parse(data || '[]');\n      } catch(e) {\n        messages = [];\n      }\n      for (var i = 0; i < messages.length; i++) {\n        if (messages[i].origin === self.origin) continue;\n        if (messages[i].timestamp < self.lastMessage) continue;\n        if (messages[i].id) {\n          if (self.receivedIDs.hasOwnProperty(messages[i].id)) continue;\n          self.receivedIDs[messages[i].id] = true;\n        }\n        self.trigger(messages[i].name, messages[i].payload);\n      }\n      self.lastMessage = now;\n    });\n  }\n\n  this._trigger('storage', event);\n};\n\nIntercom.prototype._emit = function(name, message, id) {\n  id = (typeof id === 'string' || typeof id === 'number') ? String(id) : null;\n  if (id && id.length) {\n    if (this.receivedIDs.hasOwnProperty(id)) return;\n    this.receivedIDs[id] = true;\n  }\n\n  var packet = {\n    id        : id,\n    name      : name,\n    origin    : this.origin,\n    timestamp : Date.now(),\n    payload   : message\n  };\n\n  var self = this;\n  this._transaction(function() {\n    var data = localStorage.getItem(INDEX_EMIT) || '[]';\n    var delimiter = (data === '[]') ? '' : ',';\n    data = [data.substring(0, data.length - 1), delimiter, JSON.stringify(packet), ']'].join('');\n    localStorage.setItem(INDEX_EMIT, data);\n    self.trigger(name, message);\n\n    setTimeout(function() {\n      self._cleanup_emit();\n    }, 50);\n  });\n};\n\nIntercom.prototype.emit = function(name, message) {\n  this._emit.apply(this, arguments);\n  this._trigger('emit', name, message);\n};\n\nIntercom.prototype.once = function(key, fn, ttl) {\n  if (!Intercom.supported) {\n    return;\n  }\n\n  var self = this;\n  this._transaction(function() {\n    var data;\n    try {\n      data = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');\n    } catch(e) {\n      data = {};\n    }\n    if (!self._once_expired(key, data)) {\n      return;\n    }\n\n    data[key] = {};\n    data[key].timestamp = Date.now();\n    if (typeof ttl === 'number') {\n      data[key].ttl = ttl * 1000;\n    }\n\n    localStorage.setItem(INDEX_ONCE, JSON.stringify(data));\n    fn();\n\n    setTimeout(function() {\n      self._cleanup_once();\n    }, 50);\n  });\n};\n\nextend(Intercom.prototype, EventEmitter.prototype);\n\nIntercom.supported = (typeof localStorage !== 'undefined');\n\nvar INDEX_EMIT = 'intercom';\nvar INDEX_ONCE = 'intercom_once';\nvar INDEX_LOCK = 'intercom_lock';\n\nvar THRESHOLD_TTL_EMIT = 50000;\nvar THRESHOLD_TTL_ONCE = 1000 * 3600;\n\nIntercom.destroy = function() {\n  localStorage.removeItem(INDEX_LOCK);\n  localStorage.removeItem(INDEX_EMIT);\n  localStorage.removeItem(INDEX_ONCE);\n};\n\nIntercom.getInstance = (function() {\n  var intercom;\n  return function() {\n    if (!intercom) {\n      intercom = new Intercom();\n    }\n    return intercom;\n  };\n})();\n\nmodule.exports = Intercom;\n","var EventEmitter = require('../lib/eventemitter.js');\nvar Path = require('./path.js');\nvar Intercom = require('../lib/intercom.js');\n\n/**\n * FSWatcher based on node.js' FSWatcher\n * see https://github.com/joyent/node/blob/master/lib/fs.js\n */\nfunction FSWatcher() {\n  EventEmitter.call(this);\n  var self = this;\n  var recursive = false;\n  var recursivePathPrefix;\n  var filename;\n\n  function onchange(path) {\n    // Watch for exact filename, or parent path when recursive is true.\n    if(filename === path || (recursive && path.indexOf(recursivePathPrefix) === 0)) {\n      self.trigger('change', 'change', path);\n    }\n  }\n\n  // We support, but ignore the second arg, which node.js uses.\n  self.start = function(filename_, persistent_, recursive_) {\n    // Bail if we've already started (and therefore have a filename);\n    if(filename) {\n      return;\n    }\n\n    if(Path.isNull(filename_)) {\n      throw new Error('Path must be a string without null bytes.');\n    }\n\n    // TODO: get realpath for symlinks on filename...\n\n    // Filer's Path.normalize strips trailing slashes, which we use here.\n    // See https://github.com/js-platform/filer/issues/105\n    filename = Path.normalize(filename_);\n\n    // Whether to watch beneath this path or not\n    recursive = recursive_ === true;\n    // If recursive, construct a path prefix portion for comparisons later\n    // (i.e., '/path' becomes '/path/' so we can search within a filename for the\n    // prefix). We also take care to allow for '/' on its own.\n    if(recursive) {\n      recursivePathPrefix = filename === '/' ? '/' : filename + '/';\n    }\n\n    var intercom = Intercom.getInstance();\n    intercom.on('change', onchange);\n  };\n\n  self.close = function() {\n    var intercom = Intercom.getInstance();\n    intercom.off('change', onchange);\n    self.removeAllListeners('change');\n  };\n}\nFSWatcher.prototype = new EventEmitter();\nFSWatcher.prototype.constructor = FSWatcher;\n\nmodule.exports = FSWatcher;\n","var MODE_FILE = require('./constants.js').MODE_FILE;\n\nmodule.exports = function DirectoryEntry(id, type) {\n  this.id = id;\n  this.type = type || MODE_FILE;\n};\n","var Errors = require('./errors.js');\n\nfunction OpenFileDescription(path, id, flags, position) {\n  this.path = path;\n  this.id = id;\n  this.flags = flags;\n  this.position = position;\n}\n\n// Tries to find the node associated with an ofd's `id`.\n// If not found, an error is returned on the callback.\nOpenFileDescription.prototype.getNode = function(context, callback) {\n  var id = this.id;\n  var path = this.path;\n\n  function check_if_node_exists(error, node) {\n    if(error) {\n      return callback(error);\n    }\n\n    if(!node) {\n      return callback(new Errors.EBADF('file descriptor refers to unknown node', path));\n    }\n\n    callback(null, node);\n  }\n\n  context.getObject(id, check_if_node_exists);\n};\n\nmodule.exports = OpenFileDescription;\n","var Constants = require('./constants.js');\n\nfunction SuperNode(options) {\n  var now = Date.now();\n\n  this.id = Constants.SUPER_NODE_ID;\n  this.mode = Constants.MODE_META;\n  this.atime = options.atime || now;\n  this.ctime = options.ctime || now;\n  this.mtime = options.mtime || now;\n  // root node id (randomly generated)\n  this.rnode = options.rnode;\n}\n\nSuperNode.create = function(options, callback) {\n  options.guid(function(err, rnode) {\n    if(err) {\n      callback(err);\n      return;\n    }\n    options.rnode = options.rnode || rnode;\n    callback(null, new SuperNode(options));\n  });\n};\n\nmodule.exports = SuperNode;\n","var MODE_FILE = require('./constants.js').MODE_FILE;\n\nfunction Node(options) {\n  var now = Date.now();\n\n  this.id = options.id;\n  this.mode = options.mode || MODE_FILE;  // node type (file, directory, etc)\n  this.size = options.size || 0; // size (bytes for files, entries for directories)\n  this.atime = options.atime || now; // access time (will mirror ctime after creation)\n  this.ctime = options.ctime || now; // creation/change time\n  this.mtime = options.mtime || now; // modified time\n  this.flags = options.flags || []; // file flags\n  this.xattrs = options.xattrs || {}; // extended attributes\n  this.nlinks = options.nlinks || 0; // links count\n  this.version = options.version || 0; // node version\n  this.blksize = undefined; // block size\n  this.nblocks = 1; // blocks count\n  this.data = options.data; // id for data object\n}\n\n// Make sure the options object has an id on property,\n// either from caller or one we generate using supplied guid fn.\nfunction ensureID(options, prop, callback) {\n  if(options[prop]) {\n    callback(null);\n  } else {\n    options.guid(function(err, id) {\n      options[prop] = id;\n      callback(err);\n    });\n  }\n}\n\nNode.create = function(options, callback) {\n  // We expect both options.id and options.data to be provided/generated.\n  ensureID(options, 'id', function(err) {\n    if(err) {\n      callback(err);\n      return;\n    }\n\n    ensureID(options, 'data', function(err) {\n      if(err) {\n        callback(err);\n        return;\n      }\n\n      callback(null, new Node(options));\n    });\n  });\n};\n\nmodule.exports = Node;\n","var Constants = require('./constants.js');\n\nfunction Stats(fileNode, devName) {\n  this.node = fileNode.id;\n  this.dev = devName;\n  this.size = fileNode.size;\n  this.nlinks = fileNode.nlinks;\n  this.atime = fileNode.atime;\n  this.mtime = fileNode.mtime;\n  this.ctime = fileNode.ctime;\n  this.type = fileNode.mode;\n}\n\nStats.prototype.isFile = function() {\n  return this.type === Constants.MODE_FILE;\n};\n\nStats.prototype.isDirectory = function() {\n  return this.type === Constants.MODE_DIRECTORY;\n};\n\nStats.prototype.isSymbolicLink = function() {\n  return this.type === Constants.MODE_SYMBOLIC_LINK;\n};\n\n// These will always be false in Filer.\nStats.prototype.isSocket          =\nStats.prototype.isFIFO            =\nStats.prototype.isCharacterDevice =\nStats.prototype.isBlockDevice     =\nfunction() {\n  return false;\n};\n\nmodule.exports = Stats;\n","var _ = require('../../lib/nodash.js');\n\nvar Path = require('../path.js');\nvar normalize = Path.normalize;\nvar dirname = Path.dirname;\nvar basename = Path.basename;\nvar isAbsolutePath = Path.isAbsolute;\nvar isNullPath = Path.isNull;\n\nvar Constants = require('../constants.js');\nvar MODE_FILE = Constants.MODE_FILE;\nvar MODE_DIRECTORY = Constants.MODE_DIRECTORY;\nvar MODE_SYMBOLIC_LINK = Constants.MODE_SYMBOLIC_LINK;\nvar MODE_META = Constants.MODE_META;\n\nvar ROOT_DIRECTORY_NAME = Constants.ROOT_DIRECTORY_NAME;\nvar SUPER_NODE_ID = Constants.SUPER_NODE_ID;\nvar SYMLOOP_MAX = Constants.SYMLOOP_MAX;\n\nvar O_READ = Constants.O_READ;\nvar O_WRITE = Constants.O_WRITE;\nvar O_CREATE = Constants.O_CREATE;\nvar O_EXCLUSIVE = Constants.O_EXCLUSIVE;\nvar O_TRUNCATE = Constants.O_TRUNCATE;\nvar O_APPEND = Constants.O_APPEND;\nvar O_FLAGS = Constants.O_FLAGS;\n\nvar XATTR_CREATE = Constants.XATTR_CREATE;\nvar XATTR_REPLACE = Constants.XATTR_REPLACE;\nvar FS_NOMTIME = Constants.FS_NOMTIME;\nvar FS_NOCTIME = Constants.FS_NOCTIME;\n\nvar Encoding = require('../encoding.js');\nvar Errors = require('../errors.js');\nvar DirectoryEntry = require('../directory-entry.js');\nvar OpenFileDescription = require('../open-file-description.js');\nvar SuperNode = require('../super-node.js');\nvar Node = require('../node.js');\nvar Stats = require('../stats.js');\nvar Buffer = require('../buffer.js');\n\n/**\n * Update node times. Only passed times are modified (undefined times are ignored)\n * and filesystem flags are examined in order to override update logic.\n */\nfunction update_node_times(context, path, node, times, callback) {\n  // Honour mount flags for how we update times\n  var flags = context.flags;\n  if(_(flags).contains(FS_NOCTIME)) {\n    delete times.ctime;\n  }\n  if(_(flags).contains(FS_NOMTIME)) {\n    delete times.mtime;\n  }\n\n  // Only do the update if required (i.e., times are still present)\n  var update = false;\n  if(times.ctime) {\n    node.ctime = times.ctime;\n    // We don't do atime tracking for perf reasons, but do mirror ctime\n    node.atime = times.ctime;\n    update = true;\n  }\n  if(times.atime) {\n    // The only time we explicitly pass atime is when utimes(), futimes() is called.\n    // Override ctime mirror here if so\n    node.atime = times.atime;\n    update = true;\n  }\n  if(times.mtime) {\n    node.mtime = times.mtime;\n    update = true;\n  }\n\n  function complete(error) {\n    // Queue this change so we can send watch events.\n    // Unlike node.js, we send the full path vs. basename/dirname only.\n    context.changes.push({ event: 'change', path: path });\n    callback(error);\n  }\n\n  if(update) {\n    context.putObject(node.id, node, complete);\n  } else {\n    complete();\n  }\n}\n\n/**\n * make_node()\n */\n// in: file or directory path\n// out: new node representing file/directory\nfunction make_node(context, path, mode, callback) {\n  if(mode !== MODE_DIRECTORY && mode !== MODE_FILE) {\n    return callback(new Errors.EINVAL('mode must be a directory or file', path));\n  }\n\n  path = normalize(path);\n\n  var name = basename(path);\n  var parentPath = dirname(path);\n  var parentNode;\n  var parentNodeData;\n  var node;\n\n  // Check if the parent node exists\n  function create_node_in_parent(error, parentDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(parentDirectoryNode.mode !== MODE_DIRECTORY) {\n      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));\n    } else {\n      parentNode = parentDirectoryNode;\n      find_node(context, path, check_if_node_exists);\n    }\n  }\n\n  // Check if the node to be created already exists\n  function check_if_node_exists(error, result) {\n    if(!error && result) {\n      callback(new Errors.EEXIST('path name already exists', path));\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      context.getObject(parentNode.data, create_node);\n    }\n  }\n\n  // Create the new node\n  function create_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentNodeData = result;\n      Node.create({guid: context.guid, mode: mode}, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        node = result;\n        node.nlinks += 1;\n        context.putObject(node.id, node, update_parent_node_data);\n      });\n    }\n  }\n\n  // Update parent node time\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, node, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  // Update the parent nodes data\n  function update_parent_node_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      parentNodeData[name] = new DirectoryEntry(node.id, mode);\n      context.putObject(parentNode.data, parentNodeData, update_time);\n    }\n  }\n\n  // Find the parent node\n  find_node(context, parentPath, create_node_in_parent);\n}\n\n/**\n * find_node\n */\n// in: file or directory path\n// out: node structure, or error\nfunction find_node(context, path, callback) {\n  path = normalize(path);\n  if(!path) {\n    return callback(new Errors.ENOENT('path is an empty string'));\n  }\n  var name = basename(path);\n  var parentPath = dirname(path);\n  var followedCount = 0;\n\n  function read_root_directory_node(error, superNode) {\n    if(error) {\n      callback(error);\n    } else if(!superNode || superNode.mode !== MODE_META || !superNode.rnode) {\n      callback(new Errors.EFILESYSTEMERROR());\n    } else {\n      context.getObject(superNode.rnode, check_root_directory_node);\n    }\n  }\n\n  function check_root_directory_node(error, rootDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(!rootDirectoryNode) {\n      callback(new Errors.ENOENT());\n    } else {\n      callback(null, rootDirectoryNode);\n    }\n  }\n\n  // in: parent directory node\n  // out: parent directory data\n  function read_parent_directory_data(error, parentDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(parentDirectoryNode.mode !== MODE_DIRECTORY || !parentDirectoryNode.data) {\n      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));\n    } else {\n      context.getObject(parentDirectoryNode.data, get_node_from_parent_directory_data);\n    }\n  }\n\n  // in: parent directory data\n  // out: searched node\n  function get_node_from_parent_directory_data(error, parentDirectoryData) {\n    if(error) {\n      callback(error);\n    } else {\n      if(!_(parentDirectoryData).has(name)) {\n        callback(new Errors.ENOENT(null, path));\n      } else {\n        var nodeId = parentDirectoryData[name].id;\n        context.getObject(nodeId, is_symbolic_link);\n      }\n    }\n  }\n\n  function is_symbolic_link(error, node) {\n    if(error) {\n      callback(error);\n    } else {\n      if(node.mode == MODE_SYMBOLIC_LINK) {\n        followedCount++;\n        if(followedCount > SYMLOOP_MAX){\n          callback(new Errors.ELOOP(null, path));\n        } else {\n          follow_symbolic_link(node.data);\n        }\n      } else {\n        callback(null, node);\n      }\n    }\n  }\n\n  function follow_symbolic_link(data) {\n    data = normalize(data);\n    parentPath = dirname(data);\n    name = basename(data);\n    if(ROOT_DIRECTORY_NAME == name) {\n      context.getObject(SUPER_NODE_ID, read_root_directory_node);\n    } else {\n      find_node(context, parentPath, read_parent_directory_data);\n    }\n  }\n\n  if(ROOT_DIRECTORY_NAME == name) {\n    context.getObject(SUPER_NODE_ID, read_root_directory_node);\n  } else {\n    find_node(context, parentPath, read_parent_directory_data);\n  }\n}\n\n\n/**\n * set extended attribute (refactor)\n */\nfunction set_extended_attribute (context, path, node, name, value, flag, callback) {\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      update_node_times(context, path, node, { ctime: Date.now() }, callback);\n    }\n  }\n\n  var xattrs = node.xattrs;\n\n  if (flag === XATTR_CREATE && xattrs.hasOwnProperty(name)) {\n    callback(new Errors.EEXIST('attribute already exists', path));\n  }\n  else if (flag === XATTR_REPLACE && !xattrs.hasOwnProperty(name)) {\n    callback(new Errors.ENOATTR(null, path));\n  }\n  else {\n    xattrs[name] = value;\n    context.putObject(node.id, node, update_time);\n  }\n}\n\n/**\n * ensure_root_directory. Creates a root node if necessary.\n *\n * Note: this should only be invoked when formatting a new file system.\n * Multiple invocations of this by separate instances will still result\n * in only a single super node.\n */\nfunction ensure_root_directory(context, callback) {\n  var superNode;\n  var directoryNode;\n  var directoryData;\n\n  function ensure_super_node(error, existingNode) {\n    if(!error && existingNode) {\n      // Another instance has beat us and already created the super node.\n      callback();\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      SuperNode.create({guid: context.guid}, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        superNode = result;\n        context.putObject(superNode.id, superNode, write_directory_node);\n      });\n    }\n  }\n\n  function write_directory_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      Node.create({guid: context.guid, id: superNode.rnode, mode: MODE_DIRECTORY}, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        directoryNode = result;\n        directoryNode.nlinks += 1;\n        context.putObject(directoryNode.id, directoryNode, write_directory_data);\n      });\n    }\n  }\n\n  function write_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = {};\n      context.putObject(directoryNode.data, directoryData, callback);\n    }\n  }\n\n  context.getObject(SUPER_NODE_ID, ensure_super_node);\n}\n\n/**\n * make_directory\n */\nfunction make_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var parentDirectoryNode;\n  var parentDirectoryData;\n\n  function check_if_directory_exists(error, result) {\n    if(!error && result) {\n      callback(new Errors.EEXIST(null, path));\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      find_node(context, parentPath, read_parent_directory_data);\n    }\n  }\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryNode = result;\n      context.getObject(parentDirectoryNode.data, write_directory_node);\n    }\n  }\n\n  function write_directory_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryData = result;\n      Node.create({guid: context.guid, mode: MODE_DIRECTORY}, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        directoryNode = result;\n        directoryNode.nlinks += 1;\n        context.putObject(directoryNode.id, directoryNode, write_directory_data);\n      });\n    }\n  }\n\n  function write_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = {};\n      context.putObject(directoryNode.data, directoryData, update_parent_directory_data);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryData[name] = new DirectoryEntry(directoryNode.id, MODE_DIRECTORY);\n      context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);\n    }\n  }\n\n  find_node(context, path, check_if_directory_exists);\n}\n\n/**\n * remove_directory\n */\nfunction remove_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var parentDirectoryNode;\n  var parentDirectoryData;\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryNode = result;\n      context.getObject(parentDirectoryNode.data, check_if_node_exists);\n    }\n  }\n\n  function check_if_node_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else if(ROOT_DIRECTORY_NAME == name) {\n      callback(new Errors.EBUSY(null, path));\n    } else if(!_(result).has(name)) {\n      callback(new Errors.ENOENT(null, path));\n    } else {\n      parentDirectoryData = result;\n      directoryNode = parentDirectoryData[name].id;\n      context.getObject(directoryNode, check_if_node_is_directory);\n    }\n  }\n\n  function check_if_node_is_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.mode != MODE_DIRECTORY) {\n      callback(new Errors.ENOTDIR(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_directory_is_empty);\n    }\n  }\n\n  function check_if_directory_is_empty(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).size() > 0) {\n        callback(new Errors.ENOTEMPTY(null, path));\n      } else {\n        remove_directory_entry_from_parent_directory_node();\n      }\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, remove_directory_node);\n    }\n  }\n\n  function remove_directory_entry_from_parent_directory_node() {\n    delete parentDirectoryData[name];\n    context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);\n  }\n\n  function remove_directory_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(directoryNode.id, remove_directory_data);\n    }\n  }\n\n  function remove_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(directoryNode.data, callback);\n    }\n  }\n\n  find_node(context, parentPath, read_parent_directory_data);\n}\n\nfunction open_file(context, path, flags, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var directoryEntry;\n  var fileNode;\n  var fileData;\n\n  var followedCount = 0;\n\n  if(ROOT_DIRECTORY_NAME == name) {\n    if(_(flags).contains(O_WRITE)) {\n      callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n    } else {\n      find_node(context, path, set_file_node);\n    }\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.mode !== MODE_DIRECTORY) {\n      callback(new Errors.ENOENT(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).has(name)) {\n        if(_(flags).contains(O_EXCLUSIVE)) {\n          callback(new Errors.ENOENT('O_CREATE and O_EXCLUSIVE are set, and the named file exists', path));\n        } else {\n          directoryEntry = directoryData[name];\n          if(directoryEntry.type == MODE_DIRECTORY && _(flags).contains(O_WRITE)) {\n            callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n          } else {\n            context.getObject(directoryEntry.id, check_if_symbolic_link);\n          }\n        }\n      } else {\n        if(!_(flags).contains(O_CREATE)) {\n          callback(new Errors.ENOENT('O_CREATE is not set and the named file does not exist', path));\n        } else {\n          write_file_node();\n        }\n      }\n    }\n  }\n\n  function check_if_symbolic_link(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var node = result;\n      if(node.mode == MODE_SYMBOLIC_LINK) {\n        followedCount++;\n        if(followedCount > SYMLOOP_MAX){\n          callback(new Errors.ELOOP(null, path));\n        } else {\n          follow_symbolic_link(node.data);\n        }\n      } else {\n        set_file_node(undefined, node);\n      }\n    }\n  }\n\n  function follow_symbolic_link(data) {\n    data = normalize(data);\n    parentPath = dirname(data);\n    name = basename(data);\n    if(ROOT_DIRECTORY_NAME == name) {\n      if(_(flags).contains(O_WRITE)) {\n        callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n      } else {\n        find_node(context, path, set_file_node);\n      }\n    }\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function set_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      callback(null, fileNode);\n    }\n  }\n\n  function write_file_node() {\n    Node.create({guid: context.guid, mode: MODE_FILE}, function(error, result) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      fileNode = result;\n      fileNode.nlinks += 1;\n      context.putObject(fileNode.id, fileNode, write_file_data);\n    });\n  }\n\n  function write_file_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = new Buffer(0);\n      fileData.fill(0);\n      context.putBuffer(fileNode.data, fileData, update_directory_data);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, handle_update_result);\n    }\n  }\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData[name] = new DirectoryEntry(fileNode.id, MODE_FILE);\n      context.putObject(directoryNode.data, directoryData, update_time);\n    }\n  }\n\n  function handle_update_result(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, fileNode);\n    }\n  }\n}\n\nfunction replace_data(context, ofd, buffer, offset, length, callback) {\n  var fileNode;\n\n  function return_nbytes(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, length);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);\n    }\n  }\n\n  function update_file_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function write_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      var newData = new Buffer(length);\n      newData.fill(0);\n      buffer.copy(newData, 0, offset, offset + length);\n      ofd.position = length;\n\n      fileNode.size = length;\n      fileNode.version += 1;\n\n      context.putBuffer(fileNode.data, newData, update_file_node);\n    }\n  }\n\n  context.getObject(ofd.id, write_file_data);\n}\n\nfunction write_data(context, ofd, buffer, offset, length, position, callback) {\n  var fileNode;\n  var fileData;\n\n  function return_nbytes(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, length);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);\n    }\n  }\n\n  function update_file_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function update_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = result;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var _position = (!(undefined === position || null === position)) ? position : ofd.position;\n      var newSize = Math.max(fileData.length, _position + length);\n      var newData = new Buffer(newSize);\n      newData.fill(0);\n      if(fileData) {\n        fileData.copy(newData);\n      }\n      buffer.copy(newData, _position, offset, offset + length);\n      if(undefined === position) {\n        ofd.position += length;\n      }\n\n      fileNode.size = newSize;\n      fileNode.version += 1;\n\n      context.putBuffer(fileNode.data, newData, update_file_node);\n    }\n  }\n\n  function read_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      context.getBuffer(fileNode.data, update_file_data);\n    }\n  }\n\n  context.getObject(ofd.id, read_file_data);\n}\n\nfunction read_data(context, ofd, buffer, offset, length, position, callback) {\n  var fileNode;\n  var fileData;\n\n  function handle_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = result;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var _position = (!(undefined === position || null === position)) ? position : ofd.position;\n      length = (_position + length > buffer.length) ? length - _position : length;\n      fileData.copy(buffer, offset, _position, _position + length);\n      if(undefined === position) {\n        ofd.position += length;\n      }\n      callback(null, length);\n    }\n  }\n\n  function read_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.mode === 'DIRECTORY') {\n      callback(new Errors.EISDIR('the named file is a directory', ofd.path));\n    } else {\n      fileNode = result;\n      context.getBuffer(fileNode.data, handle_file_data);\n    }\n  }\n\n  context.getObject(ofd.id, read_file_data);\n}\n\nfunction stat_file(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  find_node(context, path, callback);\n}\n\nfunction fstat_file(context, ofd, callback) {\n  ofd.getNode(context, callback);\n}\n\nfunction lstat_file(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n\n  if(ROOT_DIRECTORY_NAME == name) {\n    find_node(context, path, callback);\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', path));\n      } else {\n        context.getObject(directoryData[name].id, callback);\n      }\n    }\n  }\n}\n\nfunction link_node(context, oldpath, newpath, callback) {\n  oldpath = normalize(oldpath);\n  var oldname = basename(oldpath);\n  var oldParentPath = dirname(oldpath);\n\n  newpath = normalize(newpath);\n  var newname = basename(newpath);\n  var newParentPath = dirname(newpath);\n\n  var oldDirectoryNode;\n  var oldDirectoryData;\n  var newDirectoryNode;\n  var newDirectoryData;\n  var fileNode;\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      update_node_times(context, newpath,  fileNode, { ctime: Date.now() }, callback);\n    }\n  }\n\n  function update_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      fileNode.nlinks += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function read_directory_entry(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      context.getObject(newDirectoryData[newname].id, update_file_node);\n    }\n  }\n\n  function check_if_new_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newDirectoryData = result;\n      if(_(newDirectoryData).has(newname)) {\n        callback(new Errors.EEXIST('newpath resolves to an existing file', newname));\n      } else {\n        newDirectoryData[newname] = oldDirectoryData[oldname];\n        context.putObject(newDirectoryNode.data, newDirectoryData, read_directory_entry);\n      }\n    }\n  }\n\n  function read_new_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newDirectoryNode = result;\n      context.getObject(newDirectoryNode.data, check_if_new_file_exists);\n    }\n  }\n\n  function check_if_old_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldDirectoryData = result;\n      if(!_(oldDirectoryData).has(oldname)) {\n        callback(new Errors.ENOENT('a component of either path prefix does not exist', oldname));\n      } else if(oldDirectoryData[oldname].type === 'DIRECTORY') {\n        callback(new Errors.EPERM('oldpath refers to a directory'));\n      } else {\n        find_node(context, newParentPath, read_new_directory_data);\n      }\n    }\n  }\n\n  function read_old_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldDirectoryNode = result;\n      context.getObject(oldDirectoryNode.data, check_if_old_file_exists);\n    }\n  }\n\n  find_node(context, oldParentPath, read_old_directory_data);\n}\n\nfunction unlink_node(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var fileNode;\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      delete directoryData[name];\n      context.putObject(directoryNode.data, directoryData, function(error) {\n        var now = Date.now();\n        update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);\n      });\n    }\n  }\n\n  function delete_file_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(fileNode.data, update_directory_data);\n    }\n  }\n\n  function update_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      fileNode.nlinks -= 1;\n      if(fileNode.nlinks < 1) {\n        context.delete(fileNode.id, delete_file_data);\n      } else {\n        context.putObject(fileNode.id, fileNode, function(error) {\n          update_node_times(context, path, fileNode, { ctime: Date.now() }, update_directory_data);\n        });\n      }\n    }\n  }\n\n  function check_if_node_is_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.mode === 'DIRECTORY') {\n      callback(new Errors.EPERM('unlink not permitted on directories', name));\n    } else {\n      update_file_node(null, result);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));\n      } else {\n        context.getObject(directoryData[name].id, check_if_node_is_directory);\n      }\n    }\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  find_node(context, parentPath, read_directory_data);\n}\n\nfunction read_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n\n  var directoryNode;\n  var directoryData;\n\n  function handle_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      var files = Object.keys(directoryData);\n      callback(null, files);\n    }\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.mode !== MODE_DIRECTORY) {\n      callback(new Errors.ENOTDIR(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, handle_directory_data);\n    }\n  }\n\n  find_node(context, path, read_directory_data);\n}\n\nfunction make_symbolic_link(context, srcpath, dstpath, callback) {\n  dstpath = normalize(dstpath);\n  var name = basename(dstpath);\n  var parentPath = dirname(dstpath);\n\n  var directoryNode;\n  var directoryData;\n  var fileNode;\n\n  if(ROOT_DIRECTORY_NAME == name) {\n    callback(new Errors.EEXIST(null, name));\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).has(name)) {\n        callback(new Errors.EEXIST(null, name));\n      } else {\n        write_file_node();\n      }\n    }\n  }\n\n  function write_file_node() {\n    Node.create({guid: context.guid, mode: MODE_SYMBOLIC_LINK}, function(error, result) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      fileNode = result;\n      fileNode.nlinks += 1;\n      fileNode.size = srcpath.length;\n      fileNode.data = srcpath;\n      context.putObject(fileNode.id, fileNode, update_directory_data);\n    });\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData[name] = new DirectoryEntry(fileNode.id, MODE_SYMBOLIC_LINK);\n      context.putObject(directoryNode.data, directoryData, update_time);\n    }\n  }\n}\n\nfunction read_link(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n\n  find_node(context, parentPath, read_directory_data);\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));\n      } else {\n        context.getObject(directoryData[name].id, check_if_symbolic);\n      }\n    }\n  }\n\n  function check_if_symbolic(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      if(result.mode != MODE_SYMBOLIC_LINK) {\n        callback(new Errors.EINVAL('path not a symbolic link', path));\n      } else {\n        callback(null, result.data);\n      }\n    }\n  }\n}\n\nfunction truncate_file(context, path, length, callback) {\n  path = normalize(path);\n\n  var fileNode;\n\n  function read_file_data (error, node) {\n    if (error) {\n      callback(error);\n    } else if(node.mode == MODE_DIRECTORY ) {\n      callback(new Errors.EISDIR(null, path));\n    } else{\n      fileNode = node;\n      context.getBuffer(fileNode.data, truncate_file_data);\n    }\n  }\n\n  function truncate_file_data(error, fileData) {\n    if (error) {\n      callback(error);\n    } else {\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var data = new Buffer(length);\n      data.fill(0);\n      if(fileData) {\n        fileData.copy(data);\n      }\n      context.putBuffer(fileNode.data, data, update_file_node);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, path, fileNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_file_node (error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode.size = length;\n      fileNode.version += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  if(length < 0) {\n    callback(new Errors.EINVAL('length cannot be negative'));\n  } else {\n    find_node(context, path, read_file_data);\n  }\n}\n\nfunction ftruncate_file(context, ofd, length, callback) {\n  var fileNode;\n\n  function read_file_data (error, node) {\n    if (error) {\n      callback(error);\n    } else if(node.mode == MODE_DIRECTORY ) {\n      callback(new Errors.EISDIR());\n    } else{\n      fileNode = node;\n      context.getBuffer(fileNode.data, truncate_file_data);\n    }\n  }\n\n  function truncate_file_data(error, fileData) {\n    if (error) {\n      callback(error);\n    } else {\n      var data;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      if(fileData) {\n        data = fileData.slice(0, length);\n      } else {\n        data = new Buffer(length);\n        data.fill(0);\n      }\n      context.putBuffer(fileNode.data, data, update_file_node);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_file_node (error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode.size = length;\n      fileNode.version += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  if(length < 0) {\n    callback(new Errors.EINVAL('length cannot be negative'));\n  } else {\n    ofd.getNode(context, read_file_data);\n  }\n}\n\nfunction utimes_file(context, path, atime, mtime, callback) {\n  path = normalize(path);\n\n  function update_times(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      update_node_times(context, path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);\n    }\n  }\n\n  if (typeof atime != 'number' || typeof mtime != 'number') {\n    callback(new Errors.EINVAL('atime and mtime must be number', path));\n  }\n  else if (atime < 0 || mtime < 0) {\n    callback(new Errors.EINVAL('atime and mtime must be positive integers', path));\n  }\n  else {\n    find_node(context, path, update_times);\n  }\n}\n\nfunction futimes_file(context, ofd, atime, mtime, callback) {\n\n  function update_times (error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      update_node_times(context, ofd.path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);\n    }\n  }\n\n  if (typeof atime != 'number' || typeof mtime != 'number') {\n    callback(new Errors.EINVAL('atime and mtime must be a number'));\n  }\n  else if (atime < 0 || mtime < 0) {\n    callback(new Errors.EINVAL('atime and mtime must be positive integers'));\n  }\n  else {\n    ofd.getNode(context, update_times);\n  }\n}\n\nfunction setxattr_file(context, path, name, value, flag, callback) {\n  path = normalize(path);\n\n  function setxattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n    set_extended_attribute(context, path, node, name, value, flag, callback);\n  }\n\n  if (typeof name != 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else if (flag !== null &&\n           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {\n    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE', path));\n  }\n  else {\n    find_node(context, path, setxattr);\n  }\n}\n\nfunction fsetxattr_file (context, ofd, name, value, flag, callback) {\n  function setxattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n    set_extended_attribute(context, ofd.path, node, name, value, flag, callback);\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string'));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else if (flag !== null &&\n           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {\n    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE'));\n  }\n  else {\n    ofd.getNode(context, setxattr);\n  }\n}\n\nfunction getxattr_file (context, path, name, callback) {\n  path = normalize(path);\n\n  function get_xattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR(null, path));\n    }\n    else {\n      callback(null, xattrs[name]);\n    }\n  }\n\n  if (typeof name != 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else {\n    find_node(context, path, get_xattr);\n  }\n}\n\nfunction fgetxattr_file (context, ofd, name, callback) {\n\n  function get_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR());\n    }\n    else {\n      callback(null, xattrs[name]);\n    }\n  }\n\n  if (typeof name != 'string') {\n    callback(new Errors.EINVAL());\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else {\n    ofd.getNode(context, get_xattr);\n  }\n}\n\nfunction removexattr_file (context, path, name, callback) {\n  path = normalize(path);\n\n  function remove_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    function update_time(error) {\n      if(error) {\n        callback(error);\n      } else {\n        update_node_times(context, path, node, { ctime: Date.now() }, callback);\n      }\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR(null, path));\n    }\n    else {\n      delete xattrs[name];\n      context.putObject(node.id, node, update_time);\n    }\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else {\n    find_node(context, path, remove_xattr);\n  }\n}\n\nfunction fremovexattr_file (context, ofd, name, callback) {\n\n  function remove_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    function update_time(error) {\n      if(error) {\n        callback(error);\n      } else {\n        update_node_times(context, ofd.path, node, { ctime: Date.now() }, callback);\n      }\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR());\n    }\n    else {\n      delete xattrs[name];\n      context.putObject(node.id, node, update_time);\n    }\n  }\n\n  if (typeof name != 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string'));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else {\n    ofd.getNode(context, remove_xattr);\n  }\n}\n\nfunction validate_flags(flags) {\n  if(!_(O_FLAGS).has(flags)) {\n    return null;\n  }\n  return O_FLAGS[flags];\n}\n\nfunction validate_file_options(options, enc, fileMode){\n  if(!options) {\n    options = { encoding: enc, flag: fileMode };\n  } else if(typeof options === \"function\") {\n    options = { encoding: enc, flag: fileMode };\n  } else if(typeof options === \"string\") {\n    options = { encoding: options, flag: fileMode };\n  }\n  return options;\n}\n\nfunction pathCheck(path, callback) {\n  var err;\n\n  if(!path) {\n    err = new Errors.EINVAL('Path must be a string', path);\n  } else if(isNullPath(path)) {\n    err = new Errors.EINVAL('Path must be a string without null bytes.', path);\n  } else if(!isAbsolutePath(path)) {\n    err = new Errors.EINVAL('Path must be absolute.', path);\n  }\n\n  if(err) {\n    callback(err);\n    return false;\n  }\n  return true;\n}\n\n\nfunction open(fs, context, path, flags, mode, callback) {\n  // NOTE: we support the same signature as node with a `mode` arg,\n  // but ignore it.\n  callback = arguments[arguments.length - 1];\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, fileNode) {\n    if(error) {\n      callback(error);\n    } else {\n      var position;\n      if(_(flags).contains(O_APPEND)) {\n        position = fileNode.size;\n      } else {\n        position = 0;\n      }\n      var openFileDescription = new OpenFileDescription(path, fileNode.id, flags, position);\n      var fd = fs.allocDescriptor(openFileDescription);\n      callback(null, fd);\n    }\n  }\n\n  flags = validate_flags(flags);\n  if(!flags) {\n    callback(new Errors.EINVAL('flags is not valid'), path);\n  }\n\n  open_file(context, path, flags, check_result);\n}\n\nfunction close(fs, context, fd, callback) {\n  if(!_(fs.openFiles).has(fd)) {\n    callback(new Errors.EBADF());\n  } else {\n    fs.releaseDescriptor(fd);\n    callback(null);\n  }\n}\n\nfunction mknod(fs, context, path, mode, callback) {\n  if(!pathCheck(path, callback)) return;\n  make_node(context, path, mode, callback);\n}\n\nfunction mkdir(fs, context, path, mode, callback) {\n  // NOTE: we support passing a mode arg, but we ignore it internally for now.\n  callback = arguments[arguments.length - 1];\n  if(!pathCheck(path, callback)) return;\n  make_directory(context, path, callback);\n}\n\nfunction rmdir(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  remove_directory(context, path, callback);\n}\n\nfunction stat(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  stat_file(context, path, check_result);\n}\n\nfunction fstat(fs, context, fd, callback) {\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else {\n    fstat_file(context, ofd, check_result);\n  }\n}\n\nfunction link(fs, context, oldpath, newpath, callback) {\n  if(!pathCheck(oldpath, callback)) return;\n  if(!pathCheck(newpath, callback)) return;\n  link_node(context, oldpath, newpath, callback);\n}\n\nfunction unlink(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  unlink_node(context, path, callback);\n}\n\nfunction read(fs, context, fd, buffer, offset, length, position, callback) {\n  // Follow how node.js does this\n  function wrapped_cb(err, bytesRead) {\n    // Retain a reference to buffer so that it can't be GC'ed too soon.\n    callback(err, bytesRead || 0, buffer);\n  }\n\n  offset = (undefined === offset) ? 0 : offset;\n  length = (undefined === length) ? buffer.length - offset : length;\n  callback = arguments[arguments.length - 1];\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_READ)) {\n    callback(new Errors.EBADF('descriptor does not permit reading'));\n  } else {\n    read_data(context, ofd, buffer, offset, length, position, wrapped_cb);\n  }\n}\n\nfunction readFile(fs, context, path, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, null, 'r');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'r');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);\n    var fd = fs.allocDescriptor(ofd);\n\n    function cleanup() {\n      fs.releaseDescriptor(fd);\n    }\n\n    fstat_file(context, ofd, function(err, fstatResult) {\n      if(err) {\n        cleanup();\n        return callback(err);\n      }\n\n      var stats = new Stats(fstatResult, fs.name);\n\n      if(stats.isDirectory()) {\n        cleanup();\n        return callback(new Errors.EISDIR('illegal operation on directory', path));\n      }\n\n      var size = stats.size;\n      var buffer = new Buffer(size);\n      buffer.fill(0);\n\n      read_data(context, ofd, buffer, 0, size, 0, function(err, nbytes) {\n        cleanup();\n\n        if(err) {\n          return callback(err);\n        }\n\n        var data;\n        if(options.encoding === 'utf8') {\n          data = Encoding.decode(buffer);\n        } else {\n          data = buffer;\n        }\n        callback(null, data);\n      });\n    });\n  });\n}\n\nfunction write(fs, context, fd, buffer, offset, length, position, callback) {\n  callback = arguments[arguments.length - 1];\n  offset = (undefined === offset) ? 0 : offset;\n  length = (undefined === length) ? buffer.length - offset : length;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else if(buffer.length - offset < length) {\n    callback(new Errors.EIO('intput buffer is too small'));\n  } else {\n    write_data(context, ofd, buffer, offset, length, position, callback);\n  }\n}\n\nfunction writeFile(fs, context, path, data, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, 'utf8', 'w');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'w');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  data = data || '';\n  if(typeof data === \"number\") {\n    data = '' + data;\n  }\n  if(typeof data === \"string\" && options.encoding === 'utf8') {\n    data = Encoding.encode(data);\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);\n    var fd = fs.allocDescriptor(ofd);\n\n    replace_data(context, ofd, data, 0, data.length, function(err, nbytes) {\n      fs.releaseDescriptor(fd);\n\n      if(err) {\n        return callback(err);\n      }\n      callback(null);\n    });\n  });\n}\n\nfunction appendFile(fs, context, path, data, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, 'utf8', 'a');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'a');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  data = data || '';\n  if(typeof data === \"number\") {\n    data = '' + data;\n  }\n  if(typeof data === \"string\" && options.encoding === 'utf8') {\n    data = Encoding.encode(data);\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, fileNode.size);\n    var fd = fs.allocDescriptor(ofd);\n\n    write_data(context, ofd, data, 0, data.length, ofd.position, function(err, nbytes) {\n      fs.releaseDescriptor(fd);\n\n      if(err) {\n        return callback(err);\n      }\n      callback(null);\n    });\n  });\n}\n\nfunction exists(fs, context, path, callback) {\n  function cb(err, stats) {\n    callback(err ? false : true);\n  }\n  stat(fs, context, path, cb);\n}\n\nfunction getxattr(fs, context, path, name, callback) {\n  if (!pathCheck(path, callback)) return;\n  getxattr_file(context, path, name, callback);\n}\n\nfunction fgetxattr(fs, context, fd, name, callback) {\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else {\n    fgetxattr_file(context, ofd, name, callback);\n  }\n}\n\nfunction setxattr(fs, context, path, name, value, flag, callback) {\n  if(typeof flag === 'function') {\n    callback = flag;\n    flag = null;\n  }\n\n  if (!pathCheck(path, callback)) return;\n  setxattr_file(context, path, name, value, flag, callback);\n}\n\nfunction fsetxattr(fs, context, fd, name, value, flag, callback) {\n  if(typeof flag === 'function') {\n    callback = flag;\n    flag = null;\n  }\n\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else if (!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  }\n  else {\n    fsetxattr_file(context, ofd, name, value, flag, callback);\n  }\n}\n\nfunction removexattr(fs, context, path, name, callback) {\n  if (!pathCheck(path, callback)) return;\n  removexattr_file(context, path, name, callback);\n}\n\nfunction fremovexattr(fs, context, fd, name, callback) {\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else if (!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  }\n  else {\n    fremovexattr_file(context, ofd, name, callback);\n  }\n}\n\nfunction lseek(fs, context, fd, offset, whence, callback) {\n  function update_descriptor_position(error, stats) {\n    if(error) {\n      callback(error);\n    } else {\n      if(stats.size + offset < 0) {\n        callback(new Errors.EINVAL('resulting file offset would be negative'));\n      } else {\n        ofd.position = stats.size + offset;\n        callback(null, ofd.position);\n      }\n    }\n  }\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  }\n\n  if('SET' === whence) {\n    if(offset < 0) {\n      callback(new Errors.EINVAL('resulting file offset would be negative'));\n    } else {\n      ofd.position = offset;\n      callback(null, ofd.position);\n    }\n  } else if('CUR' === whence) {\n    if(ofd.position + offset < 0) {\n      callback(new Errors.EINVAL('resulting file offset would be negative'));\n    } else {\n      ofd.position += offset;\n      callback(null, ofd.position);\n    }\n  } else if('END' === whence) {\n    fstat_file(context, ofd, update_descriptor_position);\n  } else {\n    callback(new Errors.EINVAL('whence argument is not a proper value'));\n  }\n}\n\nfunction readdir(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  read_directory(context, path, callback);\n}\n\nfunction utimes(fs, context, path, atime, mtime, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  var currentTime = Date.now();\n  atime = (atime) ? atime : currentTime;\n  mtime = (mtime) ? mtime : currentTime;\n\n  utimes_file(context, path, atime, mtime, callback);\n}\n\nfunction futimes(fs, context, fd, atime, mtime, callback) {\n  var currentTime = Date.now();\n  atime = (atime) ? atime : currentTime;\n  mtime = (mtime) ? mtime : currentTime;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    futimes_file(context, ofd, atime, mtime, callback);\n  }\n}\n\nfunction rename(fs, context, oldpath, newpath, callback) {\n  if(!pathCheck(oldpath, callback)) return;\n  if(!pathCheck(newpath, callback)) return;\n\n  oldpath = normalize(oldpath);\n  newpath = normalize(newpath);\n\n  var oldParentPath = Path.dirname(oldpath);\n  var newParentPath = Path.dirname(oldpath);\n  var oldName = Path.basename(oldpath);\n  var newName = Path.basename(newpath);\n  var oldParentDirectory, oldParentData;\n  var newParentDirectory, newParentData;\n\n  function update_times(error, newNode) {\n    if(error) {\n      callback(error);\n    } else {\n      update_node_times(context, newpath,  newNode, { ctime: Date.now() }, callback);\n    }\n  }\n\n  function read_new_directory(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.getObject(newParentData[newName].id, update_times);\n    }\n  }\n\n  function update_old_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      if(oldParentDirectory.id === newParentDirectory.id) {\n        oldParentData = newParentData;\n      }\n      delete oldParentData[oldName];\n      context.putObject(oldParentDirectory.data, oldParentData, read_new_directory);\n    }\n  }\n\n  function update_new_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentData[newName] = oldParentData[oldName];\n      context.putObject(newParentDirectory.data, newParentData, update_old_parent_directory_data);\n    }\n  }\n\n  function check_if_new_directory_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentData = result;\n      if(_(newParentData).has(newName)) {\n        remove_directory(context, newpath, update_new_parent_directory_data);\n      } else {\n        update_new_parent_directory_data();\n      }\n    }\n  }\n\n  function read_new_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentDirectory = result;\n      context.getObject(newParentDirectory.data, check_if_new_directory_exists);\n    }\n  }\n\n  function get_new_parent_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldParentData = result;\n      find_node(context, newParentPath, read_new_parent_directory_data);\n    }\n  }\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldParentDirectory = result;\n      context.getObject(result.data, get_new_parent_directory);\n    }\n  }\n\n  function unlink_old_file(error) {\n    if(error) {\n      callback(error);\n    } else {\n      unlink_node(context, oldpath, callback);\n    }\n  }\n\n  function check_node_type(error, node) {\n    if(error) {\n      callback(error);\n    } else if(node.mode === 'DIRECTORY') {\n      find_node(context, oldParentPath, read_parent_directory_data);\n    } else {\n      link_node(context, oldpath, newpath, unlink_old_file);\n    }\n  }\n\n  find_node(context, oldpath, check_node_type);\n}\n\nfunction symlink(fs, context, srcpath, dstpath, type, callback) {\n  // NOTE: we support passing the `type` arg, but ignore it.\n  callback = arguments[arguments.length - 1];\n  if(!pathCheck(srcpath, callback)) return;\n  if(!pathCheck(dstpath, callback)) return;\n  make_symbolic_link(context, srcpath, dstpath, callback);\n}\n\nfunction readlink(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  read_link(context, path, callback);\n}\n\nfunction lstat(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  lstat_file(context, path, check_result);\n}\n\nfunction truncate(fs, context, path, length, callback) {\n  // NOTE: length is optional\n  callback = arguments[arguments.length - 1];\n  length = length || 0;\n\n  if(!pathCheck(path, callback)) return;\n  truncate_file(context, path, length, callback);\n}\n\nfunction ftruncate(fs, context, fd, length, callback) {\n  // NOTE: length is optional\n  callback = arguments[arguments.length - 1];\n  length = length || 0;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    ftruncate_file(context, ofd, length, callback);\n  }\n}\n\nmodule.exports = {\n  ensureRootDirectory: ensure_root_directory,\n  open: open,\n  close: close,\n  mknod: mknod,\n  mkdir: mkdir,\n  rmdir: rmdir,\n  unlink: unlink,\n  stat: stat,\n  fstat: fstat,\n  link: link,\n  read: read,\n  readFile: readFile,\n  write: write,\n  writeFile: writeFile,\n  appendFile: appendFile,\n  exists: exists,\n  getxattr: getxattr,\n  fgetxattr: fgetxattr,\n  setxattr: setxattr,\n  fsetxattr: fsetxattr,\n  removexattr: removexattr,\n  fremovexattr: fremovexattr,\n  lseek: lseek,\n  readdir: readdir,\n  utimes: utimes,\n  futimes: futimes,\n  rename: rename,\n  symlink: symlink,\n  readlink: readlink,\n  lstat: lstat,\n  truncate: truncate,\n  ftruncate: ftruncate\n};\n","var _ = require('../../lib/nodash.js');\n\nvar isNullPath = require('../path.js').isNull;\nvar nop = require('../shared.js').nop;\n\nvar Constants = require('../constants.js');\nvar FILE_SYSTEM_NAME = Constants.FILE_SYSTEM_NAME;\nvar FS_FORMAT = Constants.FS_FORMAT;\nvar FS_READY = Constants.FS_READY;\nvar FS_PENDING = Constants.FS_PENDING;\nvar FS_ERROR = Constants.FS_ERROR;\nvar FS_NODUPEIDCHECK = Constants.FS_NODUPEIDCHECK;\n\nvar providers = require('../providers/index.js');\n\nvar Shell = require('../shell/shell.js');\nvar Intercom = require('../../lib/intercom.js');\nvar FSWatcher = require('../fs-watcher.js');\nvar Errors = require('../errors.js');\nvar defaultGuidFn = require('../shared.js').guid;\n\nvar STDIN = Constants.STDIN;\nvar STDOUT = Constants.STDOUT;\nvar STDERR = Constants.STDERR;\nvar FIRST_DESCRIPTOR = Constants.FIRST_DESCRIPTOR;\n\n// The core fs operations live on impl\nvar impl = require('./implementation.js');\n\n// node.js supports a calling pattern that leaves off a callback.\nfunction maybeCallback(callback) {\n  if(typeof callback === \"function\") {\n    return callback;\n  }\n  return function(err) {\n    if(err) {\n      throw err;\n    }\n  };\n}\n\n// Default callback that logs an error if passed in\nfunction defaultCallback(err) {\n  if(err) {\n    console.error('Filer error: ', err);\n  }\n}\n\n/**\n * FileSystem\n *\n * A FileSystem takes an `options` object, which can specify a number of,\n * options.  All options are optional, and include:\n *\n * name: the name of the file system, defaults to \"local\"\n *\n * flags: one or more flags to use when creating/opening the file system.\n *        For example: \"FORMAT\" will cause the file system to be formatted.\n *        No explicit flags are set by default.\n *\n * provider: an explicit storage provider to use for the file\n *           system's database context provider.  A number of context\n *           providers are included (see /src/providers), and users\n *           can write one of their own and pass it in to be used.\n *           By default an IndexedDB provider is used.\n *\n * guid: a function for generating unique IDs for nodes in the filesystem.\n *       Use this to override the built-in UUID generation. (Used mainly for tests).\n *\n * callback: a callback function to be executed when the file system becomes\n *           ready for use. Depending on the context provider used, this might\n *           be right away, or could take some time. The callback should expect\n *           an `error` argument, which will be null if everything worked.  Also\n *           users should check the file system's `readyState` and `error`\n *           properties to make sure it is usable.\n */\nfunction FileSystem(options, callback) {\n  options = options || {};\n  callback = callback || defaultCallback;\n\n  var flags = options.flags;\n  var guid = options.guid ? options.guid : defaultGuidFn;\n  var provider = options.provider || new providers.Default(options.name || FILE_SYSTEM_NAME);\n  // If we're given a provider, match its name unless we get an explicit name\n  var name = options.name || provider.name;\n  var forceFormatting = _(flags).contains(FS_FORMAT);\n\n  var fs = this;\n  fs.readyState = FS_PENDING;\n  fs.name = name;\n  fs.error = null;\n\n  fs.stdin = STDIN;\n  fs.stdout = STDOUT;\n  fs.stderr = STDERR;\n\n  // Expose Shell constructor\n  this.Shell = Shell.bind(undefined, this);\n\n  // Safely expose the list of open files and file\n  // descriptor management functions\n  var openFiles = {};\n  var nextDescriptor = FIRST_DESCRIPTOR;\n  Object.defineProperty(this, \"openFiles\", {\n    get: function() { return openFiles; }\n  });\n  this.allocDescriptor = function(openFileDescription) {\n    var fd = nextDescriptor ++;\n    openFiles[fd] = openFileDescription;\n    return fd;\n  };\n  this.releaseDescriptor = function(fd) {\n    delete openFiles[fd];\n  };\n\n  // Safely expose the operation queue\n  var queue = [];\n  this.queueOrRun = function(operation) {\n    var error;\n\n    if(FS_READY == fs.readyState) {\n      operation.call(fs);\n    } else if(FS_ERROR == fs.readyState) {\n      error = new Errors.EFILESYSTEMERROR('unknown error');\n    } else {\n      queue.push(operation);\n    }\n\n    return error;\n  };\n  function runQueued() {\n    queue.forEach(function(operation) {\n      operation.call(this);\n    }.bind(fs));\n    queue = null;\n  }\n\n  // We support the optional `options` arg from node, but ignore it\n  this.watch = function(filename, options, listener) {\n    if(isNullPath(filename)) {\n      throw new Error('Path must be a string without null bytes.');\n    }\n    if(typeof options === 'function') {\n      listener = options;\n      options = {};\n    }\n    options = options || {};\n    listener = listener || nop;\n\n    var watcher = new FSWatcher();\n    watcher.start(filename, false, options.recursive);\n    watcher.on('change', listener);\n\n    return watcher;\n  };\n\n  // Deal with various approaches to node ID creation\n  function wrappedGuidFn(context) {\n    return function(callback) {\n      // Skip the duplicate ID check if asked to\n      if(_(flags).contains(FS_NODUPEIDCHECK)) {\n        callback(null, guid());\n        return;\n      }\n\n      // Otherwise (default) make sure this id is unused first\n      function guidWithCheck(callback) {\n        var id = guid();\n        context.getObject(id, function(err, value) {\n          if(err) {\n            callback(err);\n            return;\n          }\n\n          // If this id is unused, use it, otherwise find another\n          if(!value) {\n            callback(null, id);\n          } else {\n            guidWithCheck(callback);\n          }\n        });\n      }\n      guidWithCheck(callback);\n    };\n  }\n\n  // Let other instances (in this or other windows) know about\n  // any changes to this fs instance.\n  function broadcastChanges(changes) {\n    if(!changes.length) {\n      return;\n    }\n    var intercom = Intercom.getInstance();\n    changes.forEach(function(change) {\n      intercom.emit(change.event, change.path);\n    });\n  }\n\n  // Open file system storage provider\n  provider.open(function(err) {\n    function complete(error) {\n      function wrappedContext(methodName) {\n        var context = provider[methodName]();\n        context.flags = flags;\n        context.changes = [];\n        context.guid = wrappedGuidFn(context);\n\n        // When the context is finished, let the fs deal with any change events\n        context.close = function() {\n          var changes = context.changes;\n          broadcastChanges(changes);\n          changes.length = 0;\n        };\n\n        return context;\n      }\n\n      // Wrap the provider so we can extend the context with fs flags and\n      // an array of changes (e.g., watch event 'change' and 'rename' events\n      // for paths updated during the lifetime of the context). From this\n      // point forward we won't call open again, so it's safe to drop it.\n      fs.provider = {\n        openReadWriteContext: function() {\n          return wrappedContext('getReadWriteContext');\n        },\n        openReadOnlyContext: function() {\n          return wrappedContext('getReadOnlyContext');\n        }\n      };\n\n      if(error) {\n        fs.readyState = FS_ERROR;\n      } else {\n        fs.readyState = FS_READY;\n      }\n      runQueued();\n      callback(error, fs);\n    }\n\n    if(err) {\n      return complete(err);\n    }\n\n    var context = provider.getReadWriteContext();\n    context.guid = wrappedGuidFn(context);\n\n    // Mount the filesystem, formatting if necessary\n    if(forceFormatting) {\n      // Wipe the storage provider, then write root block\n      context.clear(function(err) {\n        if(err) {\n          return complete(err);\n        }\n        impl.ensureRootDirectory(context, complete);\n      });\n    } else {\n      // Use existing (or create new) root and mount\n      impl.ensureRootDirectory(context, complete);\n    }\n  });\n}\n\n// Expose storage providers on FileSystem constructor\nFileSystem.providers = providers;\n\n/**\n * Public API for FileSystem\n */\n[\n  'open',\n  'close',\n  'mknod',\n  'mkdir',\n  'rmdir',\n  'stat',\n  'fstat',\n  'link',\n  'unlink',\n  'read',\n  'readFile',\n  'write',\n  'writeFile',\n  'appendFile',\n  'exists',\n  'lseek',\n  'readdir',\n  'rename',\n  'readlink',\n  'symlink',\n  'lstat',\n  'truncate',\n  'ftruncate',\n  'utimes',\n  'futimes',\n  'setxattr',\n  'getxattr',\n  'fsetxattr',\n  'fgetxattr',\n  'removexattr',\n  'fremovexattr'\n].forEach(function(methodName) {\n  FileSystem.prototype[methodName] = function() {\n    var fs = this;\n    var args = Array.prototype.slice.call(arguments, 0);\n    var lastArgIndex = args.length - 1;\n\n    // We may or may not get a callback, and since node.js supports\n    // fire-and-forget style fs operations, we have to dance a bit here.\n    var missingCallback = typeof args[lastArgIndex] !== 'function';\n    var callback = maybeCallback(args[lastArgIndex]);\n\n    var error = fs.queueOrRun(function() {\n      var context = fs.provider.openReadWriteContext();\n\n      // Fail early if the filesystem is in an error state (e.g.,\n      // provider failed to open.\n      if(FS_ERROR === fs.readyState) {\n        var err = new Errors.EFILESYSTEMERROR('filesystem unavailable, operation canceled');\n        return callback.call(fs, err);\n      }\n\n      // Wrap the callback so we can explicitly close the context\n      function complete() {\n        context.close();\n        callback.apply(fs, arguments);\n      }\n\n      // Either add or replace the callback with our wrapper complete()\n      if(missingCallback) {\n        args.push(complete);\n      } else {\n        args[lastArgIndex] = complete;\n      }\n\n      // Forward this call to the impl's version, using the following\n      // call signature, with complete() as the callback/last-arg now:\n      // fn(fs, context, arg0, arg1, ... , complete);\n      var fnArgs = [fs, context].concat(args);\n      impl[methodName].apply(null, fnArgs);\n    });\n    if(error) {\n      callback(error);\n    }\n  };\n});\n\nmodule.exports = FileSystem;\n","module.exports = {\n  FileSystem: require('./filesystem/interface.js'),\n  Buffer: require('./buffer.js'),\n  Path: require('./path.js'),\n  Errors: require('./errors.js'),\n  Shell: require('./shell/shell.js')\n};\n"]}
\ No newline at end of file
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Cherry-picked bits of underscore.js, lodash.js\n\n/**\n * Lo-Dash 2.4.0 <http://lodash.com/>\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar ArrayProto = Array.prototype;\nvar nativeForEach = ArrayProto.forEach;\nvar nativeIndexOf = ArrayProto.indexOf;\nvar nativeSome = ArrayProto.some;\n\nvar ObjProto = Object.prototype;\nvar hasOwnProperty = ObjProto.hasOwnProperty;\nvar nativeKeys = Object.keys;\n\nvar breaker = {};\n\nfunction has(obj, key) {\n  return hasOwnProperty.call(obj, key);\n}\n\nvar keys = nativeKeys || function(obj) {\n  if (obj !== Object(obj)) throw new TypeError('Invalid object');\n  var keys = [];\n  for (var key in obj) if (has(obj, key)) keys.push(key);\n  return keys;\n};\n\nfunction size(obj) {\n  if (obj == 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iterator.call(context, value, index, list))) return breaker;\n  });\n  return !!result;\n};\n\nfunction contains(obj, target) {\n  if (obj == null) return false;\n  if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;\n  return any(obj, function(value) {\n    return value === target;\n  });\n};\n\nfunction Wrapped(value) {\n  this.value = value;\n}\nWrapped.prototype.has = function(key) {\n  return has(this.value, key);\n};\nWrapped.prototype.contains = function(target) {\n  return contains(this.value, target);\n};\nWrapped.prototype.size = function() {\n  return size(this.value);\n};\n\nfunction nodash(value) {\n  // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor\n  return (value && typeof value == 'object' && !Array.isArray(value) && hasOwnProperty.call(value, '__wrapped__'))\n    ? value\n    : new Wrapped(value);\n}\n\nmodule.exports = nodash;\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// Based on https://github.com/joyent/node/blob/41e53e557992a7d552a8e23de035f9463da25c99/lib/path.js\n\n// resolves . and .. elements in a path array with directory names there\n// must be no slashes, empty elements, or device names (c:\\) in the array\n// (so also no leading and trailing slashes - it does not distinguish\n// relative and absolute paths)\nfunction normalizeArray(parts, allowAboveRoot) {\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = parts.length - 1; i >= 0; i--) {\n    var last = parts[i];\n    if (last === '.') {\n      parts.splice(i, 1);\n    } else if (last === '..') {\n      parts.splice(i, 1);\n      up++;\n    } else if (up) {\n      parts.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (allowAboveRoot) {\n    for (; up--; up) {\n      parts.unshift('..');\n    }\n  }\n\n  return parts;\n}\n\n// Split a filename into [root, dir, basename, ext], unix version\n// 'root' is just a slash, or nothing.\nvar splitPathRe =\n      /^(\\/?)([\\s\\S]+\\/(?!$)|\\/)?((?:\\.{1,2}$|[\\s\\S]+?)?(\\.[^.\\/]*)?)$/;\nvar splitPath = function(filename) {\n  var result = splitPathRe.exec(filename);\n  return [result[1] || '', result[2] || '', result[3] || '', result[4] || ''];\n};\n\n// path.resolve([from ...], to)\nfunction resolve() {\n  var resolvedPath = '',\n      resolvedAbsolute = false;\n\n  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {\n    // XXXfiler: we don't have process.cwd() so we use '/' as a fallback\n    var path = (i >= 0) ? arguments[i] : '/';\n\n    // Skip empty and invalid entries\n    if (typeof path !== 'string' || !path) {\n      continue;\n    }\n\n    resolvedPath = path + '/' + resolvedPath;\n    resolvedAbsolute = path.charAt(0) === '/';\n  }\n\n  // At this point the path should be resolved to a full absolute path, but\n  // handle relative paths to be safe (might happen when process.cwd() fails)\n\n  // Normalize the path\n  resolvedPath = normalizeArray(resolvedPath.split('/').filter(function(p) {\n    return !!p;\n  }), !resolvedAbsolute).join('/');\n\n  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';\n}\n\n// path.normalize(path)\nfunction normalize(path) {\n  var isAbsolute = path.charAt(0) === '/',\n      trailingSlash = path.substr(-1) === '/';\n\n  // Normalize the path\n  path = normalizeArray(path.split('/').filter(function(p) {\n    return !!p;\n  }), !isAbsolute).join('/');\n\n  if (!path && !isAbsolute) {\n    path = '.';\n  }\n  /*\n   if (path && trailingSlash) {\n   path += '/';\n   }\n   */\n\n  return (isAbsolute ? '/' : '') + path;\n}\n\nfunction join() {\n  var paths = Array.prototype.slice.call(arguments, 0);\n  return normalize(paths.filter(function(p, index) {\n    return p && typeof p === 'string';\n  }).join('/'));\n}\n\n// path.relative(from, to)\nfunction relative(from, to) {\n  from = resolve(from).substr(1);\n  to = resolve(to).substr(1);\n\n  function trim(arr) {\n    var start = 0;\n    for (; start < arr.length; start++) {\n      if (arr[start] !== '') break;\n    }\n\n    var end = arr.length - 1;\n    for (; end >= 0; end--) {\n      if (arr[end] !== '') break;\n    }\n\n    if (start > end) return [];\n    return arr.slice(start, end - start + 1);\n  }\n\n  var fromParts = trim(from.split('/'));\n  var toParts = trim(to.split('/'));\n\n  var length = Math.min(fromParts.length, toParts.length);\n  var samePartsLength = length;\n  for (var i = 0; i < length; i++) {\n    if (fromParts[i] !== toParts[i]) {\n      samePartsLength = i;\n      break;\n    }\n  }\n\n  var outputParts = [];\n  for (var i = samePartsLength; i < fromParts.length; i++) {\n    outputParts.push('..');\n  }\n\n  outputParts = outputParts.concat(toParts.slice(samePartsLength));\n\n  return outputParts.join('/');\n}\n\nfunction dirname(path) {\n  var result = splitPath(path),\n      root = result[0],\n      dir = result[1];\n\n  if (!root && !dir) {\n    // No dirname whatsoever\n    return '.';\n  }\n\n  if (dir) {\n    // It has a dirname, strip trailing slash\n    dir = dir.substr(0, dir.length - 1);\n  }\n\n  return root + dir;\n}\n\nfunction basename(path, ext) {\n  var f = splitPath(path)[2];\n  // TODO: make this comparison case-insensitive on windows?\n  if (ext && f.substr(-1 * ext.length) === ext) {\n    f = f.substr(0, f.length - ext.length);\n  }\n  // XXXfiler: node.js just does `return f`\n  return f === \"\" ? \"/\" : f;\n}\n\nfunction extname(path) {\n  return splitPath(path)[3];\n}\n\nfunction isAbsolute(path) {\n  if(path.charAt(0) === '/') {\n    return true;\n  }\n  return false;\n}\n\nfunction isNull(path) {\n  if (('' + path).indexOf('\\u0000') !== -1) {\n    return true;\n  }\n  return false;\n}\n\n// Make sure we don't double-add a trailing slash (e.g., '/' -> '//')\nfunction addTrailing(path) {\n  return path.replace(/\\/*$/, '/');\n}\n\n// Deal with multiple slashes at the end, one, or none\n// and make sure we don't return the empty string.\nfunction removeTrailing(path) {\n  path = path.replace(/\\/*$/, '');\n  return path === '' ? '/' : path;\n}\n\n// XXXfiler: we don't support path.exists() or path.existsSync(), which\n// are deprecated, and need a FileSystem instance to work. Use fs.stat().\n\nmodule.exports = {\n  normalize: normalize,\n  resolve: resolve,\n  join: join,\n  relative: relative,\n  sep: '/',\n  delimiter: ':',\n  dirname: dirname,\n  basename: basename,\n  extname: extname,\n  isAbsolute: isAbsolute,\n  isNull: isNull,\n  // Non-node but useful...\n  addTrailing: addTrailing,\n  removeTrailing: removeTrailing\n};\n","function guid() {\n  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {\n    var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);\n    return v.toString(16);\n  }).toUpperCase();\n}\n\nfunction nop() {}\n\n/**\n * Convert a Uint8Array to a regular array\n */\nfunction u8toArray(u8) {\n  var array = [];\n  var len = u8.length;\n  for(var i = 0; i < len; i++) {\n    array[i] = u8[i];\n  }\n  return array;\n}\n\nmodule.exports = {\n  guid: guid,\n  u8toArray: u8toArray,\n  nop: nop\n};\n","var O_READ = 'READ';\nvar O_WRITE = 'WRITE';\nvar O_CREATE = 'CREATE';\nvar O_EXCLUSIVE = 'EXCLUSIVE';\nvar O_TRUNCATE = 'TRUNCATE';\nvar O_APPEND = 'APPEND';\nvar XATTR_CREATE = 'CREATE';\nvar XATTR_REPLACE = 'REPLACE';\n\nmodule.exports = {\n  FILE_SYSTEM_NAME: 'local',\n\n  FILE_STORE_NAME: 'files',\n\n  IDB_RO: 'readonly',\n  IDB_RW: 'readwrite',\n\n  WSQL_VERSION: \"1\",\n  WSQL_SIZE: 5 * 1024 * 1024,\n  WSQL_DESC: \"FileSystem Storage\",\n\n  NODE_TYPE_FILE: 'FILE',\n  NODE_TYPE_DIRECTORY: 'DIRECTORY',\n  NODE_TYPE_SYMBOLIC_LINK: 'SYMLINK',\n  NODE_TYPE_META: 'META',\n\n  S_IFREG: 0x8000,\n  S_IFDIR: 0x4000,\n  S_IFLNK: 0xA000,\n\n  DEFAULT_DIR_PERMISSIONS: 0x1ED, // 755\n  DEFAULT_FILE_PERMISSIONS: 0x1A4, // 644\n  FULL_READ_WRITE_EXEC_PERMISSIONS: 0x1FF, // 777\n  READ_WRITE_PERMISSIONS: 0x1B6, /// 666\n  \n  SYMLOOP_MAX: 10,\n\n  BINARY_MIME_TYPE: 'application/octet-stream',\n  JSON_MIME_TYPE: 'application/json',\n\n  ROOT_DIRECTORY_NAME: '/', // basename(normalize(path))\n\n  // FS Mount Flags\n  FS_FORMAT: 'FORMAT',\n  FS_NOCTIME: 'NOCTIME',\n  FS_NOMTIME: 'NOMTIME',\n  FS_NODUPEIDCHECK: 'FS_NODUPEIDCHECK',\n\n  // FS File Open Flags\n  O_READ: O_READ,\n  O_WRITE: O_WRITE,\n  O_CREATE: O_CREATE,\n  O_EXCLUSIVE: O_EXCLUSIVE,\n  O_TRUNCATE: O_TRUNCATE,\n  O_APPEND: O_APPEND,\n\n  O_FLAGS: {\n    'r': [O_READ],\n    'r+': [O_READ, O_WRITE],\n    'w': [O_WRITE, O_CREATE, O_TRUNCATE],\n    'w+': [O_WRITE, O_READ, O_CREATE, O_TRUNCATE],\n    'wx': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],\n    'wx+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],\n    'a': [O_WRITE, O_CREATE, O_APPEND],\n    'a+': [O_WRITE, O_READ, O_CREATE, O_APPEND],\n    'ax': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_APPEND],\n    'ax+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_APPEND]\n  },\n\n  XATTR_CREATE: XATTR_CREATE,\n  XATTR_REPLACE: XATTR_REPLACE,\n\n  FS_READY: 'READY',\n  FS_PENDING: 'PENDING',\n  FS_ERROR: 'ERROR',\n\n  SUPER_NODE_ID: '00000000-0000-0000-0000-000000000000',\n\n  // Reserved File Descriptors for streams\n  STDIN: 0,\n  STDOUT: 1,\n  STDERR: 2,\n  FIRST_DESCRIPTOR: 3,\n\n  ENVIRONMENT: {\n    TMP: '/tmp',\n    PATH: ''\n  },\n\n  // Duplicate Node's fs.constants\n  fsConstants: {\n    O_RDONLY: 0,\n    O_WRONLY: 1,\n    O_RDWR: 2,\n    S_IFMT: 61440,\n    S_IFREG: 32768,\n    S_IFDIR: 16384,\n    S_IFCHR: 8192,\n    S_IFBLK: 24576,\n    S_IFIFO: 4096,\n    S_IFLNK: 40960,\n    S_IFSOCK: 49152,\n    O_CREAT: 512,\n    O_EXCL: 2048,\n    O_NOCTTY: 131072,\n    O_TRUNC: 1024,\n    O_APPEND: 8,\n    O_DIRECTORY: 1048576,\n    O_NOFOLLOW: 256,\n    O_SYNC: 128,\n    O_DSYNC: 4194304,\n    O_SYMLINK: 2097152,\n    O_NONBLOCK: 4,\n    S_IRWXU: 448,\n    S_IRUSR: 256,\n    S_IWUSR: 128,\n    S_IXUSR: 64,\n    S_IRWXG: 56,\n    S_IRGRP: 32,\n    S_IWGRP: 16,\n    S_IXGRP: 8,\n    S_IRWXO: 7,\n    S_IROTH: 4,\n    S_IWOTH: 2,\n    S_IXOTH: 1,\n    F_OK: 0,\n    R_OK: 4,\n    W_OK: 2,\n    X_OK: 1,\n    UV_FS_COPYFILE_EXCL: 1,\n    COPYFILE_EXCL: 1\n  }\n};\n","var errors = {};\n[\n  /**\n   * node.js errors - we only use some of these, add as needed.\n   */\n  //'-1:UNKNOWN:unknown error',\n  //'0:OK:success',\n  //'1:EOF:end of file',\n  //'2:EADDRINFO:getaddrinfo error',\n  //'3:EACCES:permission denied',\n  //'4:EAGAIN:resource temporarily unavailable',\n  //'5:EADDRINUSE:address already in use',\n  //'6:EADDRNOTAVAIL:address not available',\n  //'7:EAFNOSUPPORT:address family not supported',\n  //'8:EALREADY:connection already in progress',\n  '9:EBADF:bad file descriptor',\n  '10:EBUSY:resource busy or locked',\n  //'11:ECONNABORTED:software caused connection abort',\n  //'12:ECONNREFUSED:connection refused',\n  //'13:ECONNRESET:connection reset by peer',\n  //'14:EDESTADDRREQ:destination address required',\n  //'15:EFAULT:bad address in system call argument',\n  //'16:EHOSTUNREACH:host is unreachable',\n  //'17:EINTR:interrupted system call',\n  '18:EINVAL:invalid argument',\n  //'19:EISCONN:socket is already connected',\n  //'20:EMFILE:too many open files',\n  //'21:EMSGSIZE:message too long',\n  //'22:ENETDOWN:network is down',\n  //'23:ENETUNREACH:network is unreachable',\n  //'24:ENFILE:file table overflow',\n  //'25:ENOBUFS:no buffer space available',\n  //'26:ENOMEM:not enough memory',\n  '27:ENOTDIR:not a directory',\n  '28:EISDIR:illegal operation on a directory',\n  //'29:ENONET:machine is not on the network',\n  // errno 30 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js\n  //'31:ENOTCONN:socket is not connected',\n  //'32:ENOTSOCK:socket operation on non-socket',\n  //'33:ENOTSUP:operation not supported on socket',\n  '34:ENOENT:no such file or directory',\n  //'35:ENOSYS:function not implemented',\n  //'36:EPIPE:broken pipe',\n  //'37:EPROTO:protocol error',\n  //'38:EPROTONOSUPPORT:protocol not supported',\n  //'39:EPROTOTYPE:protocol wrong type for socket',\n  //'40:ETIMEDOUT:connection timed out',\n  //'41:ECHARSET:invalid Unicode character',\n  //'42:EAIFAMNOSUPPORT:address family for hostname not supported',\n  // errno 43 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js\n  //'44:EAISERVICE:servname not supported for ai_socktype',\n  //'45:EAISOCKTYPE:ai_socktype not supported',\n  //'46:ESHUTDOWN:cannot send after transport endpoint shutdown',\n  '47:EEXIST:file already exists',\n  //'48:ESRCH:no such process',\n  //'49:ENAMETOOLONG:name too long',\n  '50:EPERM:operation not permitted',\n  '51:ELOOP:too many symbolic links encountered',\n  //'52:EXDEV:cross-device link not permitted',\n  '53:ENOTEMPTY:directory not empty',\n  //'54:ENOSPC:no space left on device',\n  '55:EIO:i/o error',\n  //'56:EROFS:read-only file system',\n  //'57:ENODEV:no such device',\n  //'58:ESPIPE:invalid seek',\n  //'59:ECANCELED:operation canceled',\n\n  /**\n   * Filer specific errors\n   */\n  '1000:ENOTMOUNTED:not mounted',\n  '1001:EFILESYSTEMERROR:missing super node, use \\'FORMAT\\' flag to format filesystem.',\n  '1002:ENOATTR:attribute does not exist'\n\n].forEach(function(e) {\n  e = e.split(':');\n  var errno = +e[0];\n  var errName = e[1];\n  var defaultMessage = e[2];\n\n  function FilerError(msg, path) {\n    Error.call(this);\n\n    this.name = errName;\n    this.code = errName;\n    this.errno = errno;\n    this.message = msg || defaultMessage;\n    if(path) {\n      this.path = path;\n    }\n    this.stack = (new Error(this.message)).stack;\n  }\n  FilerError.prototype = Object.create(Error.prototype);\n  FilerError.prototype.constructor = FilerError;\n  FilerError.prototype.toString = function() {\n    var pathInfo = this.path ? (', \\'' + this.path + '\\'') : '';\n    return this.name + ': ' + this.message + pathInfo;\n  };\n\n  // We expose the error as both Errors.EINVAL and Errors[18]\n  errors[errName] = errors[errno] = FilerError;\n});\n\nmodule.exports = errors;\n","'use strict'\n\nexports.byteLength = byteLength\nexports.toByteArray = toByteArray\nexports.fromByteArray = fromByteArray\n\nvar lookup = []\nvar revLookup = []\nvar Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array\n\nvar code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'\nfor (var i = 0, len = code.length; i < len; ++i) {\n  lookup[i] = code[i]\n  revLookup[code.charCodeAt(i)] = i\n}\n\n// Support decoding URL-safe base64 strings, as Node.js does.\n// See: https://en.wikipedia.org/wiki/Base64#URL_applications\nrevLookup['-'.charCodeAt(0)] = 62\nrevLookup['_'.charCodeAt(0)] = 63\n\nfunction getLens (b64) {\n  var len = b64.length\n\n  if (len % 4 > 0) {\n    throw new Error('Invalid string. Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  for (var i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(\n      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)\n    ))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};\n","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; ++i) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n\nfunction isnan (val) {\n  return val !== val // eslint-disable-line no-self-compare\n}\n","function FilerBuffer (subject, encoding, nonZero) {\n\n  // Automatically turn ArrayBuffer into Uint8Array so that underlying\n  // Buffer code doesn't just throw away and ignore ArrayBuffer data.\n  if (subject instanceof ArrayBuffer) {\n    subject = new Uint8Array(subject);\n  }\n\n  return new Buffer(subject, encoding, nonZero);\n};\n\n// Inherit prototype from Buffer\nFilerBuffer.prototype = Object.create(Buffer.prototype);\nFilerBuffer.prototype.constructor = FilerBuffer;\n\n// Also copy static methods onto FilerBuffer ctor\nObject.keys(Buffer).forEach(function (p) {\n  if (Buffer.hasOwnProperty(p)) {\n    FilerBuffer[p] = Buffer[p];\n  }\n});\n\nmodule.exports = FilerBuffer;\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\nvar FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;\nvar IDB_RW = require('../constants.js').IDB_RW;\nvar IDB_RO = require('../constants.js').IDB_RO;\nvar Errors = require('../errors.js');\nvar FilerBuffer = require('../buffer.js');\n\nvar indexedDB = global.indexedDB       ||\n                global.mozIndexedDB    ||\n                global.webkitIndexedDB ||\n                global.msIndexedDB;\n\nfunction IndexedDBContext(db, mode) {\n  this.db = db;\n  this.mode = mode;\n}\n\nIndexedDBContext.prototype._getObjectStore = function() {\n  if(this.objectStore) {\n    return this.objectStore;\n  }\n\n  var transaction = this.db.transaction(FILE_STORE_NAME, this.mode);\n  this.objectStore = transaction.objectStore(FILE_STORE_NAME);\n  return this.objectStore;\n};\n\nIndexedDBContext.prototype.clear = function(callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.clear();\n    request.onsuccess = function() {\n      callback();\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\nIndexedDBContext.prototype._get = function(key, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.get(key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\nIndexedDBContext.prototype.getObject = function(key, callback) {\n  this._get(key, callback);\n};\nIndexedDBContext.prototype.getBuffer = function(key, callback) {\n  this._get(key, function(err, arrayBuffer) {\n    if(err) {\n      return callback(err);\n    }\n    callback(null, new FilerBuffer(arrayBuffer));\n  });\n};\n\nIndexedDBContext.prototype._put = function(key, value, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.put(value, key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\nIndexedDBContext.prototype.putObject = function(key, value, callback) {\n  this._put(key, value, callback);\n};\nIndexedDBContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {\n  var buf = uint8BackedBuffer.buffer;\n  this._put(key, buf, callback);\n};\n\nIndexedDBContext.prototype.delete = function(key, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.delete(key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\n\nfunction IndexedDB(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n  this.db = null;\n}\nIndexedDB.isSupported = function() {\n  return !!indexedDB;\n};\n\nIndexedDB.prototype.open = function(callback) {\n  var that = this;\n\n  // Bail if we already have a db open\n  if(that.db) {\n    return callback();\n  }\n\n  try {\n    // NOTE: we're not using versioned databases.\n    var openRequest = indexedDB.open(that.name);\n\n    // If the db doesn't exist, we'll create it\n    openRequest.onupgradeneeded = function onupgradeneeded(event) {\n      var db = event.target.result;\n\n      if(db.objectStoreNames.contains(FILE_STORE_NAME)) {\n        db.deleteObjectStore(FILE_STORE_NAME);\n      }\n      db.createObjectStore(FILE_STORE_NAME);\n    };\n\n    openRequest.onsuccess = function onsuccess(event) {\n      that.db = event.target.result;\n      callback();\n    };\n    openRequest.onerror = function onerror(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\nIndexedDB.prototype.getReadOnlyContext = function() {\n  return new IndexedDBContext(this.db, IDB_RO);\n};\nIndexedDB.prototype.getReadWriteContext = function() {\n  return new IndexedDBContext(this.db, IDB_RW);\n};\n\nmodule.exports = IndexedDB;\n","/*\n * base64-arraybuffer\n * https://github.com/niklasvh/base64-arraybuffer\n *\n * Copyright (c) 2012 Niklas von Hertzen\n * Licensed under the MIT license.\n */\n(function(){\n  \"use strict\";\n\n  var chars = \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/\";\n\n  // Use a lookup table to find the index.\n  var lookup = new Uint8Array(256);\n  for (var i = 0; i < chars.length; i++) {\n    lookup[chars.charCodeAt(i)] = i;\n  }\n\n  exports.encode = function(arraybuffer) {\n    var bytes = new Uint8Array(arraybuffer),\n    i, len = bytes.length, base64 = \"\";\n\n    for (i = 0; i < len; i+=3) {\n      base64 += chars[bytes[i] >> 2];\n      base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];\n      base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];\n      base64 += chars[bytes[i + 2] & 63];\n    }\n\n    if ((len % 3) === 2) {\n      base64 = base64.substring(0, base64.length - 1) + \"=\";\n    } else if (len % 3 === 1) {\n      base64 = base64.substring(0, base64.length - 2) + \"==\";\n    }\n\n    return base64;\n  };\n\n  exports.decode =  function(base64) {\n    var bufferLength = base64.length * 0.75,\n    len = base64.length, i, p = 0,\n    encoded1, encoded2, encoded3, encoded4;\n\n    if (base64[base64.length - 1] === \"=\") {\n      bufferLength--;\n      if (base64[base64.length - 2] === \"=\") {\n        bufferLength--;\n      }\n    }\n\n    var arraybuffer = new ArrayBuffer(bufferLength),\n    bytes = new Uint8Array(arraybuffer);\n\n    for (i = 0; i < len; i+=4) {\n      encoded1 = lookup[base64.charCodeAt(i)];\n      encoded2 = lookup[base64.charCodeAt(i+1)];\n      encoded3 = lookup[base64.charCodeAt(i+2)];\n      encoded4 = lookup[base64.charCodeAt(i+3)];\n\n      bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);\n      bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);\n      bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);\n    }\n\n    return arraybuffer;\n  };\n})();\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\nvar FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;\nvar WSQL_VERSION = require('../constants.js').WSQL_VERSION;\nvar WSQL_SIZE = require('../constants.js').WSQL_SIZE;\nvar WSQL_DESC = require('../constants.js').WSQL_DESC;\nvar Errors = require('../errors.js');\nvar FilerBuffer = require('../buffer.js');\nvar base64ArrayBuffer = require('base64-arraybuffer');\n\nfunction WebSQLContext(db, isReadOnly) {\n  var that = this;\n  this.getTransaction = function(callback) {\n    if(that.transaction) {\n      callback(that.transaction);\n      return;\n    }\n    // Either do readTransaction() (read-only) or transaction() (read/write)\n    db[isReadOnly ? 'readTransaction' : 'transaction'](function(transaction) {\n      that.transaction = transaction;\n      callback(transaction);\n    });\n  };\n}\n\nWebSQLContext.prototype.clear = function(callback) {\n  function onError(transaction, error) {\n    callback(error);\n  }\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  this.getTransaction(function(transaction) {\n    transaction.executeSql(\"DELETE FROM \" + FILE_STORE_NAME + \";\",\n                           [], onSuccess, onError);\n  });\n};\n\nfunction _get(getTransaction, key, callback) {\n  function onSuccess(transaction, result) {\n    // If the key isn't found, return null\n    var value = result.rows.length === 0 ? null : result.rows.item(0).data;\n    callback(null, value);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  getTransaction(function(transaction) {\n    transaction.executeSql(\"SELECT data FROM \" + FILE_STORE_NAME + \" WHERE id = ? LIMIT 1;\",\n                           [key], onSuccess, onError);\n  });\n}\nWebSQLContext.prototype.getObject = function(key, callback) {\n  _get(this.getTransaction, key, function(err, result) {\n    if(err) {\n      return callback(err);\n    }\n\n    try {\n      if(result) {\n        result = JSON.parse(result);\n      }\n    } catch(e) {\n      return callback(e);\n    }\n\n    callback(null, result);\n  });\n};\nWebSQLContext.prototype.getBuffer = function(key, callback) {\n  _get(this.getTransaction, key, function(err, result) {\n    if(err) {\n      return callback(err);\n    }\n\n    // Deal with zero-length ArrayBuffers, which will be encoded as ''\n    if(result || result === '') {\n      var arrayBuffer = base64ArrayBuffer.decode(result);\n      result = new FilerBuffer(arrayBuffer);\n    }\n\n    callback(null, result);\n  });\n};\n\nfunction _put(getTransaction, key, value, callback) {\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  getTransaction(function(transaction) {\n    transaction.executeSql(\"INSERT OR REPLACE INTO \" + FILE_STORE_NAME + \" (id, data) VALUES (?, ?);\",\n                           [key, value], onSuccess, onError);\n  });\n}\nWebSQLContext.prototype.putObject = function(key, value, callback) {\n  var json = JSON.stringify(value);\n  _put(this.getTransaction, key, json, callback);\n};\nWebSQLContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {\n  var base64 = base64ArrayBuffer.encode(uint8BackedBuffer.buffer);\n  _put(this.getTransaction, key, base64, callback);\n};\n\nWebSQLContext.prototype.delete = function(key, callback) {\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  this.getTransaction(function(transaction) {\n    transaction.executeSql(\"DELETE FROM \" + FILE_STORE_NAME + \" WHERE id = ?;\",\n                           [key], onSuccess, onError);\n  });\n};\n\n\nfunction WebSQL(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n  this.db = null;\n}\nWebSQL.isSupported = function() {\n  return !!global.openDatabase;\n};\n\nWebSQL.prototype.open = function(callback) {\n  var that = this;\n\n  // Bail if we already have a db open\n  if(that.db) {\n    return callback();\n  }\n\n  var db = global.openDatabase(that.name, WSQL_VERSION, WSQL_DESC, WSQL_SIZE);\n  if(!db) {\n    callback(\"[WebSQL] Unable to open database.\");\n    return;\n  }\n\n  function onError(transaction, error) {\n    if (error.code === 5) {\n      callback(new Errors.EINVAL('WebSQL cannot be accessed. If private browsing is enabled, disable it.'));\n    }\n    callback(error);\n  }\n  function onSuccess(transaction, result) {\n    that.db = db;\n    callback();\n  }\n\n  // Create the table and index we'll need to store the fs data.\n  db.transaction(function(transaction) {\n    function createIndex(transaction) {\n      transaction.executeSql(\"CREATE INDEX IF NOT EXISTS idx_\" + FILE_STORE_NAME + \"_id\" +\n                             \" on \" + FILE_STORE_NAME + \" (id);\",\n                             [], onSuccess, onError);\n    }\n    transaction.executeSql(\"CREATE TABLE IF NOT EXISTS \" + FILE_STORE_NAME + \" (id unique, data TEXT);\",\n                           [], createIndex, onError);\n  });\n};\nWebSQL.prototype.getReadOnlyContext = function() {\n  return new WebSQLContext(this.db, true);\n};\nWebSQL.prototype.getReadWriteContext = function() {\n  return new WebSQLContext(this.db, false);\n};\n\nmodule.exports = WebSQL;\n","// shim for using process in browser\nvar process = module.exports = {};\n\n// cached from whatever global is present so that test runners that stub it\n// don't break things.  But we need to wrap it in a try catch in case it is\n// wrapped in strict mode code which doesn't define any globals.  It's inside a\n// function because try/catches deoptimize in certain engines.\n\nvar cachedSetTimeout;\nvar cachedClearTimeout;\n\nfunction defaultSetTimout() {\n    throw new Error('setTimeout has not been defined');\n}\nfunction defaultClearTimeout () {\n    throw new Error('clearTimeout has not been defined');\n}\n(function () {\n    try {\n        if (typeof setTimeout === 'function') {\n            cachedSetTimeout = setTimeout;\n        } else {\n            cachedSetTimeout = defaultSetTimout;\n        }\n    } catch (e) {\n        cachedSetTimeout = defaultSetTimout;\n    }\n    try {\n        if (typeof clearTimeout === 'function') {\n            cachedClearTimeout = clearTimeout;\n        } else {\n            cachedClearTimeout = defaultClearTimeout;\n        }\n    } catch (e) {\n        cachedClearTimeout = defaultClearTimeout;\n    }\n} ())\nfunction runTimeout(fun) {\n    if (cachedSetTimeout === setTimeout) {\n        //normal enviroments in sane situations\n        return setTimeout(fun, 0);\n    }\n    // if setTimeout wasn't available but was latter defined\n    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {\n        cachedSetTimeout = setTimeout;\n        return setTimeout(fun, 0);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedSetTimeout(fun, 0);\n    } catch(e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally\n            return cachedSetTimeout.call(null, fun, 0);\n        } catch(e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error\n            return cachedSetTimeout.call(this, fun, 0);\n        }\n    }\n\n\n}\nfunction runClearTimeout(marker) {\n    if (cachedClearTimeout === clearTimeout) {\n        //normal enviroments in sane situations\n        return clearTimeout(marker);\n    }\n    // if clearTimeout wasn't available but was latter defined\n    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {\n        cachedClearTimeout = clearTimeout;\n        return clearTimeout(marker);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedClearTimeout(marker);\n    } catch (e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally\n            return cachedClearTimeout.call(null, marker);\n        } catch (e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.\n            // Some versions of I.E. have different rules for clearTimeout vs setTimeout\n            return cachedClearTimeout.call(this, marker);\n        }\n    }\n\n\n\n}\nvar queue = [];\nvar draining = false;\nvar currentQueue;\nvar queueIndex = -1;\n\nfunction cleanUpNextTick() {\n    if (!draining || !currentQueue) {\n        return;\n    }\n    draining = false;\n    if (currentQueue.length) {\n        queue = currentQueue.concat(queue);\n    } else {\n        queueIndex = -1;\n    }\n    if (queue.length) {\n        drainQueue();\n    }\n}\n\nfunction drainQueue() {\n    if (draining) {\n        return;\n    }\n    var timeout = runTimeout(cleanUpNextTick);\n    draining = true;\n\n    var len = queue.length;\n    while(len) {\n        currentQueue = queue;\n        queue = [];\n        while (++queueIndex < len) {\n            if (currentQueue) {\n                currentQueue[queueIndex].run();\n            }\n        }\n        queueIndex = -1;\n        len = queue.length;\n    }\n    currentQueue = null;\n    draining = false;\n    runClearTimeout(timeout);\n}\n\nprocess.nextTick = function (fun) {\n    var args = new Array(arguments.length - 1);\n    if (arguments.length > 1) {\n        for (var i = 1; i < arguments.length; i++) {\n            args[i - 1] = arguments[i];\n        }\n    }\n    queue.push(new Item(fun, args));\n    if (queue.length === 1 && !draining) {\n        runTimeout(drainQueue);\n    }\n};\n\n// v8 likes predictible objects\nfunction Item(fun, array) {\n    this.fun = fun;\n    this.array = array;\n}\nItem.prototype.run = function () {\n    this.fun.apply(null, this.array);\n};\nprocess.title = 'browser';\nprocess.browser = true;\nprocess.env = {};\nprocess.argv = [];\nprocess.version = ''; // empty string to avoid regexp issues\nprocess.versions = {};\n\nfunction noop() {}\n\nprocess.on = noop;\nprocess.addListener = noop;\nprocess.once = noop;\nprocess.off = noop;\nprocess.removeListener = noop;\nprocess.removeAllListeners = noop;\nprocess.emit = noop;\nprocess.prependListener = noop;\nprocess.prependOnceListener = noop;\n\nprocess.listeners = function (name) { return [] }\n\nprocess.binding = function (name) {\n    throw new Error('process.binding is not supported');\n};\n\nprocess.cwd = function () { return '/' };\nprocess.chdir = function (dir) {\n    throw new Error('process.chdir is not supported');\n};\nprocess.umask = function() { return 0; };\n","/*global setImmediate: false, setTimeout: false, console: false */\n\n/**\n * async.js shim, based on https://raw.github.com/caolan/async/master/lib/async.js Feb 18, 2014\n * Used under MIT - https://github.com/caolan/async/blob/master/LICENSE\n */\n\n(function () {\n\n    var async = {};\n\n    // async.js functions used in Filer\n\n    //// nextTick implementation with browser-compatible fallback ////\n    if (typeof process === 'undefined' || !(process.nextTick)) {\n        if (typeof setImmediate === 'function') {\n            async.nextTick = function (fn) {\n                // not a direct alias for IE10 compatibility\n                setImmediate(fn);\n            };\n            async.setImmediate = async.nextTick;\n        }\n        else {\n            async.nextTick = function (fn) {\n                setTimeout(fn, 0);\n            };\n            async.setImmediate = async.nextTick;\n        }\n    }\n    else {\n        async.nextTick = process.nextTick;\n        if (typeof setImmediate !== 'undefined') {\n            async.setImmediate = function (fn) {\n              // not a direct alias for IE10 compatibility\n              setImmediate(fn);\n            };\n        }\n        else {\n            async.setImmediate = async.nextTick;\n        }\n    }\n\n    async.eachSeries = function (arr, iterator, callback) {\n        callback = callback || function () {};\n        if (!arr.length) {\n            return callback();\n        }\n        var completed = 0;\n        var iterate = function () {\n            iterator(arr[completed], function (err) {\n                if (err) {\n                    callback(err);\n                    callback = function () {};\n                }\n                else {\n                    completed += 1;\n                    if (completed >= arr.length) {\n                        callback();\n                    }\n                    else {\n                        iterate();\n                    }\n                }\n            });\n        };\n        iterate();\n    };\n    async.forEachSeries = async.eachSeries;\n\n    // AMD / RequireJS\n    if (typeof define !== 'undefined' && define.amd) {\n        define([], function () {\n            return async;\n        });\n    }\n    // Node.js\n    else if (typeof module !== 'undefined' && module.exports) {\n        module.exports = async;\n    }\n    // included directly via <script> tag\n    else {\n        root.async = async;\n    }\n\n}());\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\n// NOTE: prefer setImmediate to nextTick for proper recursion yielding.\n// see https://github.com/js-platform/filer/pull/24\nvar asyncCallback = require('../../lib/async.js').setImmediate;\n\n/**\n * Make shared in-memory DBs possible when using the same name.\n */\nvar createDB = (function() {\n  var pool = {};\n  return function getOrCreate(name) {\n    if(!pool.hasOwnProperty(name)) {\n      pool[name] = {};\n    }\n    return pool[name];\n  };\n}());\n\nfunction MemoryContext(db, readOnly) {\n  this.readOnly = readOnly;\n  this.objectStore = db;\n}\n\nMemoryContext.prototype.clear = function(callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  var objectStore = this.objectStore;\n  Object.keys(objectStore).forEach(function(key){\n    delete objectStore[key];\n  });\n  asyncCallback(callback);\n};\n\n// Memory context doesn't care about differences between Object and Buffer\nMemoryContext.prototype.getObject =\nMemoryContext.prototype.getBuffer =\nfunction(key, callback) {\n  var that = this;\n  asyncCallback(function() {\n    callback(null, that.objectStore[key]);\n  });\n};\nMemoryContext.prototype.putObject =\nMemoryContext.prototype.putBuffer =\nfunction(key, value, callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  this.objectStore[key] = value;\n  asyncCallback(callback);\n};\n\nMemoryContext.prototype.delete = function(key, callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  delete this.objectStore[key];\n  asyncCallback(callback);\n};\n\n\nfunction Memory(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n}\nMemory.isSupported = function() {\n  return true;\n};\n\nMemory.prototype.open = function(callback) {\n  this.db = createDB(this.name);\n  asyncCallback(callback);\n};\nMemory.prototype.getReadOnlyContext = function() {\n  return new MemoryContext(this.db, true);\n};\nMemory.prototype.getReadWriteContext = function() {\n  return new MemoryContext(this.db, false);\n};\n\nmodule.exports = Memory;\n","var IndexedDB = require('./indexeddb.js');\nvar WebSQL = require('./websql.js');\nvar Memory = require('./memory.js');\n\nmodule.exports = {\n  IndexedDB: IndexedDB,\n  WebSQL: WebSQL,\n  Memory: Memory,\n\n  /**\n   * Convenience Provider references\n   */\n\n  // The default provider to use when none is specified\n  Default: IndexedDB,\n\n  // The Fallback provider does automatic fallback checks\n  Fallback: (function() {\n    if(IndexedDB.isSupported()) {\n      return IndexedDB;\n    }\n\n    if(WebSQL.isSupported()) {\n      return WebSQL;\n    }\n\n    function NotSupported() {\n      throw \"[Filer Error] Your browser doesn't support IndexedDB or WebSQL.\";\n    }\n    NotSupported.isSupported = function() {\n      return false;\n    };\n    return NotSupported;\n  }())\n};\n","var defaults = require('../constants.js').ENVIRONMENT;\n\nmodule.exports = function Environment(env) {\n  env = env || {};\n  env.TMP = env.TMP || defaults.TMP;\n  env.PATH = env.PATH || defaults.PATH;\n\n  this.get = function(name) {\n    return env[name];\n  };\n\n  this.set = function(name, value) {\n    env[name] = value;\n  };\n};\n","// Adapt encodings to work with Buffer or Uint8Array, they expect the latter\nfunction decode(buf) {\n  return buf.toString('utf8');\n}\n\nfunction encode(string) {\n  return new Buffer(string, 'utf8');\n}\n\nmodule.exports = {\n  encode: encode,\n  decode: decode\n};\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// resolves . and .. elements in a path array with directory names there\n// must be no slashes, empty elements, or device names (c:\\) in the array\n// (so also no leading and trailing slashes - it does not distinguish\n// relative and absolute paths)\nfunction normalizeArray(parts, allowAboveRoot) {\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = parts.length - 1; i >= 0; i--) {\n    var last = parts[i];\n    if (last === '.') {\n      parts.splice(i, 1);\n    } else if (last === '..') {\n      parts.splice(i, 1);\n      up++;\n    } else if (up) {\n      parts.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (allowAboveRoot) {\n    for (; up--; up) {\n      parts.unshift('..');\n    }\n  }\n\n  return parts;\n}\n\n// Split a filename into [root, dir, basename, ext], unix version\n// 'root' is just a slash, or nothing.\nvar splitPathRe =\n    /^(\\/?|)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?|)(\\.[^.\\/]*|))(?:[\\/]*)$/;\nvar splitPath = function(filename) {\n  return splitPathRe.exec(filename).slice(1);\n};\n\n// path.resolve([from ...], to)\n// posix version\nexports.resolve = function() {\n  var resolvedPath = '',\n      resolvedAbsolute = false;\n\n  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {\n    var path = (i >= 0) ? arguments[i] : process.cwd();\n\n    // Skip empty and invalid entries\n    if (typeof path !== 'string') {\n      throw new TypeError('Arguments to path.resolve must be strings');\n    } else if (!path) {\n      continue;\n    }\n\n    resolvedPath = path + '/' + resolvedPath;\n    resolvedAbsolute = path.charAt(0) === '/';\n  }\n\n  // At this point the path should be resolved to a full absolute path, but\n  // handle relative paths to be safe (might happen when process.cwd() fails)\n\n  // Normalize the path\n  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {\n    return !!p;\n  }), !resolvedAbsolute).join('/');\n\n  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';\n};\n\n// path.normalize(path)\n// posix version\nexports.normalize = function(path) {\n  var isAbsolute = exports.isAbsolute(path),\n      trailingSlash = substr(path, -1) === '/';\n\n  // Normalize the path\n  path = normalizeArray(filter(path.split('/'), function(p) {\n    return !!p;\n  }), !isAbsolute).join('/');\n\n  if (!path && !isAbsolute) {\n    path = '.';\n  }\n  if (path && trailingSlash) {\n    path += '/';\n  }\n\n  return (isAbsolute ? '/' : '') + path;\n};\n\n// posix version\nexports.isAbsolute = function(path) {\n  return path.charAt(0) === '/';\n};\n\n// posix version\nexports.join = function() {\n  var paths = Array.prototype.slice.call(arguments, 0);\n  return exports.normalize(filter(paths, function(p, index) {\n    if (typeof p !== 'string') {\n      throw new TypeError('Arguments to path.join must be strings');\n    }\n    return p;\n  }).join('/'));\n};\n\n\n// path.relative(from, to)\n// posix version\nexports.relative = function(from, to) {\n  from = exports.resolve(from).substr(1);\n  to = exports.resolve(to).substr(1);\n\n  function trim(arr) {\n    var start = 0;\n    for (; start < arr.length; start++) {\n      if (arr[start] !== '') break;\n    }\n\n    var end = arr.length - 1;\n    for (; end >= 0; end--) {\n      if (arr[end] !== '') break;\n    }\n\n    if (start > end) return [];\n    return arr.slice(start, end - start + 1);\n  }\n\n  var fromParts = trim(from.split('/'));\n  var toParts = trim(to.split('/'));\n\n  var length = Math.min(fromParts.length, toParts.length);\n  var samePartsLength = length;\n  for (var i = 0; i < length; i++) {\n    if (fromParts[i] !== toParts[i]) {\n      samePartsLength = i;\n      break;\n    }\n  }\n\n  var outputParts = [];\n  for (var i = samePartsLength; i < fromParts.length; i++) {\n    outputParts.push('..');\n  }\n\n  outputParts = outputParts.concat(toParts.slice(samePartsLength));\n\n  return outputParts.join('/');\n};\n\nexports.sep = '/';\nexports.delimiter = ':';\n\nexports.dirname = function(path) {\n  var result = splitPath(path),\n      root = result[0],\n      dir = result[1];\n\n  if (!root && !dir) {\n    // No dirname whatsoever\n    return '.';\n  }\n\n  if (dir) {\n    // It has a dirname, strip trailing slash\n    dir = dir.substr(0, dir.length - 1);\n  }\n\n  return root + dir;\n};\n\n\nexports.basename = function(path, ext) {\n  var f = splitPath(path)[2];\n  // TODO: make this comparison case-insensitive on windows?\n  if (ext && f.substr(-1 * ext.length) === ext) {\n    f = f.substr(0, f.length - ext.length);\n  }\n  return f;\n};\n\n\nexports.extname = function(path) {\n  return splitPath(path)[3];\n};\n\nfunction filter (xs, f) {\n    if (xs.filter) return xs.filter(f);\n    var res = [];\n    for (var i = 0; i < xs.length; i++) {\n        if (f(xs[i], i, xs)) res.push(xs[i]);\n    }\n    return res;\n}\n\n// String.prototype.substr - negative index don't work in IE8\nvar substr = 'ab'.substr(-1) === 'b'\n    ? function (str, start, len) { return str.substr(start, len) }\n    : function (str, start, len) {\n        if (start < 0) start = str.length + start;\n        return str.substr(start, len);\n    }\n;\n","module.exports = function (xs, fn) {\n    var res = [];\n    for (var i = 0; i < xs.length; i++) {\n        var x = fn(xs[i], i);\n        if (isArray(x)) res.push.apply(res, x);\n        else res.push(x);\n    }\n    return res;\n};\n\nvar isArray = Array.isArray || function (xs) {\n    return Object.prototype.toString.call(xs) === '[object Array]';\n};\n","'use strict';\nmodule.exports = balanced;\nfunction balanced(a, b, str) {\n  if (a instanceof RegExp) a = maybeMatch(a, str);\n  if (b instanceof RegExp) b = maybeMatch(b, str);\n\n  var r = range(a, b, str);\n\n  return r && {\n    start: r[0],\n    end: r[1],\n    pre: str.slice(0, r[0]),\n    body: str.slice(r[0] + a.length, r[1]),\n    post: str.slice(r[1] + b.length)\n  };\n}\n\nfunction maybeMatch(reg, str) {\n  var m = str.match(reg);\n  return m ? m[0] : null;\n}\n\nbalanced.range = range;\nfunction range(a, b, str) {\n  var begs, beg, left, right, result;\n  var ai = str.indexOf(a);\n  var bi = str.indexOf(b, ai + 1);\n  var i = ai;\n\n  if (ai >= 0 && bi > 0) {\n    begs = [];\n    left = str.length;\n\n    while (i >= 0 && !result) {\n      if (i == ai) {\n        begs.push(i);\n        ai = str.indexOf(a, i + 1);\n      } else if (begs.length == 1) {\n        result = [ begs.pop(), bi ];\n      } else {\n        beg = begs.pop();\n        if (beg < left) {\n          left = beg;\n          right = bi;\n        }\n\n        bi = str.indexOf(b, i + 1);\n      }\n\n      i = ai < bi && ai >= 0 ? ai : bi;\n    }\n\n    if (begs.length) {\n      result = [ left, right ];\n    }\n  }\n\n  return result;\n}\n","var concatMap = require('concat-map');\nvar balanced = require('balanced-match');\n\nmodule.exports = expandTop;\n\nvar escSlash = '\\0SLASH'+Math.random()+'\\0';\nvar escOpen = '\\0OPEN'+Math.random()+'\\0';\nvar escClose = '\\0CLOSE'+Math.random()+'\\0';\nvar escComma = '\\0COMMA'+Math.random()+'\\0';\nvar escPeriod = '\\0PERIOD'+Math.random()+'\\0';\n\nfunction numeric(str) {\n  return parseInt(str, 10) == str\n    ? parseInt(str, 10)\n    : str.charCodeAt(0);\n}\n\nfunction escapeBraces(str) {\n  return str.split('\\\\\\\\').join(escSlash)\n            .split('\\\\{').join(escOpen)\n            .split('\\\\}').join(escClose)\n            .split('\\\\,').join(escComma)\n            .split('\\\\.').join(escPeriod);\n}\n\nfunction unescapeBraces(str) {\n  return str.split(escSlash).join('\\\\')\n            .split(escOpen).join('{')\n            .split(escClose).join('}')\n            .split(escComma).join(',')\n            .split(escPeriod).join('.');\n}\n\n\n// Basically just str.split(\",\"), but handling cases\n// where we have nested braced sections, which should be\n// treated as individual members, like {a,{b,c},d}\nfunction parseCommaParts(str) {\n  if (!str)\n    return [''];\n\n  var parts = [];\n  var m = balanced('{', '}', str);\n\n  if (!m)\n    return str.split(',');\n\n  var pre = m.pre;\n  var body = m.body;\n  var post = m.post;\n  var p = pre.split(',');\n\n  p[p.length-1] += '{' + body + '}';\n  var postParts = parseCommaParts(post);\n  if (post.length) {\n    p[p.length-1] += postParts.shift();\n    p.push.apply(p, postParts);\n  }\n\n  parts.push.apply(parts, p);\n\n  return parts;\n}\n\nfunction expandTop(str) {\n  if (!str)\n    return [];\n\n  // I don't know why Bash 4.3 does this, but it does.\n  // Anything starting with {} will have the first two bytes preserved\n  // but *only* at the top level, so {},a}b will not expand to anything,\n  // but a{},b}c will be expanded to [a}c,abc].\n  // One could argue that this is a bug in Bash, but since the goal of\n  // this module is to match Bash's rules, we escape a leading {}\n  if (str.substr(0, 2) === '{}') {\n    str = '\\\\{\\\\}' + str.substr(2);\n  }\n\n  return expand(escapeBraces(str), true).map(unescapeBraces);\n}\n\nfunction identity(e) {\n  return e;\n}\n\nfunction embrace(str) {\n  return '{' + str + '}';\n}\nfunction isPadded(el) {\n  return /^-?0\\d/.test(el);\n}\n\nfunction lte(i, y) {\n  return i <= y;\n}\nfunction gte(i, y) {\n  return i >= y;\n}\n\nfunction expand(str, isTop) {\n  var expansions = [];\n\n  var m = balanced('{', '}', str);\n  if (!m || /\\$$/.test(m.pre)) return [str];\n\n  var isNumericSequence = /^-?\\d+\\.\\.-?\\d+(?:\\.\\.-?\\d+)?$/.test(m.body);\n  var isAlphaSequence = /^[a-zA-Z]\\.\\.[a-zA-Z](?:\\.\\.-?\\d+)?$/.test(m.body);\n  var isSequence = isNumericSequence || isAlphaSequence;\n  var isOptions = m.body.indexOf(',') >= 0;\n  if (!isSequence && !isOptions) {\n    // {a},b}\n    if (m.post.match(/,.*\\}/)) {\n      str = m.pre + '{' + m.body + escClose + m.post;\n      return expand(str);\n    }\n    return [str];\n  }\n\n  var n;\n  if (isSequence) {\n    n = m.body.split(/\\.\\./);\n  } else {\n    n = parseCommaParts(m.body);\n    if (n.length === 1) {\n      // x{{a,b}}y ==> x{a}y x{b}y\n      n = expand(n[0], false).map(embrace);\n      if (n.length === 1) {\n        var post = m.post.length\n          ? expand(m.post, false)\n          : [''];\n        return post.map(function(p) {\n          return m.pre + n[0] + p;\n        });\n      }\n    }\n  }\n\n  // at this point, n is the parts, and we know it's not a comma set\n  // with a single entry.\n\n  // no need to expand pre, since it is guaranteed to be free of brace-sets\n  var pre = m.pre;\n  var post = m.post.length\n    ? expand(m.post, false)\n    : [''];\n\n  var N;\n\n  if (isSequence) {\n    var x = numeric(n[0]);\n    var y = numeric(n[1]);\n    var width = Math.max(n[0].length, n[1].length)\n    var incr = n.length == 3\n      ? Math.abs(numeric(n[2]))\n      : 1;\n    var test = lte;\n    var reverse = y < x;\n    if (reverse) {\n      incr *= -1;\n      test = gte;\n    }\n    var pad = n.some(isPadded);\n\n    N = [];\n\n    for (var i = x; test(i, y); i += incr) {\n      var c;\n      if (isAlphaSequence) {\n        c = String.fromCharCode(i);\n        if (c === '\\\\')\n          c = '';\n      } else {\n        c = String(i);\n        if (pad) {\n          var need = width - c.length;\n          if (need > 0) {\n            var z = new Array(need + 1).join('0');\n            if (i < 0)\n              c = '-' + z + c.slice(1);\n            else\n              c = z + c;\n          }\n        }\n      }\n      N.push(c);\n    }\n  } else {\n    N = concatMap(n, function(el) { return expand(el, false) });\n  }\n\n  for (var j = 0; j < N.length; j++) {\n    for (var k = 0; k < post.length; k++) {\n      var expansion = pre + N[j] + post[k];\n      if (!isTop || isSequence || expansion)\n        expansions.push(expansion);\n    }\n  }\n\n  return expansions;\n}\n\n","module.exports = minimatch\nminimatch.Minimatch = Minimatch\n\nvar path = { sep: '/' }\ntry {\n  path = require('path')\n} catch (er) {}\n\nvar GLOBSTAR = minimatch.GLOBSTAR = Minimatch.GLOBSTAR = {}\nvar expand = require('brace-expansion')\n\nvar plTypes = {\n  '!': { open: '(?:(?!(?:', close: '))[^/]*?)'},\n  '?': { open: '(?:', close: ')?' },\n  '+': { open: '(?:', close: ')+' },\n  '*': { open: '(?:', close: ')*' },\n  '@': { open: '(?:', close: ')' }\n}\n\n// any single thing other than /\n// don't need to escape / when using new RegExp()\nvar qmark = '[^/]'\n\n// * => any number of characters\nvar star = qmark + '*?'\n\n// ** when dots are allowed.  Anything goes, except .. and .\n// not (^ or / followed by one or two dots followed by $ or /),\n// followed by anything, any number of times.\nvar twoStarDot = '(?:(?!(?:\\\\\\/|^)(?:\\\\.{1,2})($|\\\\\\/)).)*?'\n\n// not a ^ or / followed by a dot,\n// followed by anything, any number of times.\nvar twoStarNoDot = '(?:(?!(?:\\\\\\/|^)\\\\.).)*?'\n\n// characters that need to be escaped in RegExp.\nvar reSpecials = charSet('().*{}+?[]^$\\\\!')\n\n// \"abc\" -> { a:true, b:true, c:true }\nfunction charSet (s) {\n  return s.split('').reduce(function (set, c) {\n    set[c] = true\n    return set\n  }, {})\n}\n\n// normalizes slashes.\nvar slashSplit = /\\/+/\n\nminimatch.filter = filter\nfunction filter (pattern, options) {\n  options = options || {}\n  return function (p, i, list) {\n    return minimatch(p, pattern, options)\n  }\n}\n\nfunction ext (a, b) {\n  a = a || {}\n  b = b || {}\n  var t = {}\n  Object.keys(b).forEach(function (k) {\n    t[k] = b[k]\n  })\n  Object.keys(a).forEach(function (k) {\n    t[k] = a[k]\n  })\n  return t\n}\n\nminimatch.defaults = function (def) {\n  if (!def || !Object.keys(def).length) return minimatch\n\n  var orig = minimatch\n\n  var m = function minimatch (p, pattern, options) {\n    return orig.minimatch(p, pattern, ext(def, options))\n  }\n\n  m.Minimatch = function Minimatch (pattern, options) {\n    return new orig.Minimatch(pattern, ext(def, options))\n  }\n\n  return m\n}\n\nMinimatch.defaults = function (def) {\n  if (!def || !Object.keys(def).length) return Minimatch\n  return minimatch.defaults(def).Minimatch\n}\n\nfunction minimatch (p, pattern, options) {\n  if (typeof pattern !== 'string') {\n    throw new TypeError('glob pattern string required')\n  }\n\n  if (!options) options = {}\n\n  // shortcut: comments match nothing.\n  if (!options.nocomment && pattern.charAt(0) === '#') {\n    return false\n  }\n\n  // \"\" only matches \"\"\n  if (pattern.trim() === '') return p === ''\n\n  return new Minimatch(pattern, options).match(p)\n}\n\nfunction Minimatch (pattern, options) {\n  if (!(this instanceof Minimatch)) {\n    return new Minimatch(pattern, options)\n  }\n\n  if (typeof pattern !== 'string') {\n    throw new TypeError('glob pattern string required')\n  }\n\n  if (!options) options = {}\n  pattern = pattern.trim()\n\n  // windows support: need to use /, not \\\n  if (path.sep !== '/') {\n    pattern = pattern.split(path.sep).join('/')\n  }\n\n  this.options = options\n  this.set = []\n  this.pattern = pattern\n  this.regexp = null\n  this.negate = false\n  this.comment = false\n  this.empty = false\n\n  // make the set of regexps etc.\n  this.make()\n}\n\nMinimatch.prototype.debug = function () {}\n\nMinimatch.prototype.make = make\nfunction make () {\n  // don't do it more than once.\n  if (this._made) return\n\n  var pattern = this.pattern\n  var options = this.options\n\n  // empty patterns and comments match nothing.\n  if (!options.nocomment && pattern.charAt(0) === '#') {\n    this.comment = true\n    return\n  }\n  if (!pattern) {\n    this.empty = true\n    return\n  }\n\n  // step 1: figure out negation, etc.\n  this.parseNegate()\n\n  // step 2: expand braces\n  var set = this.globSet = this.braceExpand()\n\n  if (options.debug) this.debug = console.error\n\n  this.debug(this.pattern, set)\n\n  // step 3: now we have a set, so turn each one into a series of path-portion\n  // matching patterns.\n  // These will be regexps, except in the case of \"**\", which is\n  // set to the GLOBSTAR object for globstar behavior,\n  // and will not contain any / characters\n  set = this.globParts = set.map(function (s) {\n    return s.split(slashSplit)\n  })\n\n  this.debug(this.pattern, set)\n\n  // glob --> regexps\n  set = set.map(function (s, si, set) {\n    return s.map(this.parse, this)\n  }, this)\n\n  this.debug(this.pattern, set)\n\n  // filter out everything that didn't compile properly.\n  set = set.filter(function (s) {\n    return s.indexOf(false) === -1\n  })\n\n  this.debug(this.pattern, set)\n\n  this.set = set\n}\n\nMinimatch.prototype.parseNegate = parseNegate\nfunction parseNegate () {\n  var pattern = this.pattern\n  var negate = false\n  var options = this.options\n  var negateOffset = 0\n\n  if (options.nonegate) return\n\n  for (var i = 0, l = pattern.length\n    ; i < l && pattern.charAt(i) === '!'\n    ; i++) {\n    negate = !negate\n    negateOffset++\n  }\n\n  if (negateOffset) this.pattern = pattern.substr(negateOffset)\n  this.negate = negate\n}\n\n// Brace expansion:\n// a{b,c}d -> abd acd\n// a{b,}c -> abc ac\n// a{0..3}d -> a0d a1d a2d a3d\n// a{b,c{d,e}f}g -> abg acdfg acefg\n// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg\n//\n// Invalid sets are not expanded.\n// a{2..}b -> a{2..}b\n// a{b}c -> a{b}c\nminimatch.braceExpand = function (pattern, options) {\n  return braceExpand(pattern, options)\n}\n\nMinimatch.prototype.braceExpand = braceExpand\n\nfunction braceExpand (pattern, options) {\n  if (!options) {\n    if (this instanceof Minimatch) {\n      options = this.options\n    } else {\n      options = {}\n    }\n  }\n\n  pattern = typeof pattern === 'undefined'\n    ? this.pattern : pattern\n\n  if (typeof pattern === 'undefined') {\n    throw new TypeError('undefined pattern')\n  }\n\n  if (options.nobrace ||\n    !pattern.match(/\\{.*\\}/)) {\n    // shortcut. no need to expand.\n    return [pattern]\n  }\n\n  return expand(pattern)\n}\n\n// parse a component of the expanded set.\n// At this point, no pattern may contain \"/\" in it\n// so we're going to return a 2d array, where each entry is the full\n// pattern, split on '/', and then turned into a regular expression.\n// A regexp is made at the end which joins each array with an\n// escaped /, and another full one which joins each regexp with |.\n//\n// Following the lead of Bash 4.1, note that \"**\" only has special meaning\n// when it is the *only* thing in a path portion.  Otherwise, any series\n// of * is equivalent to a single *.  Globstar behavior is enabled by\n// default, and can be disabled by setting options.noglobstar.\nMinimatch.prototype.parse = parse\nvar SUBPARSE = {}\nfunction parse (pattern, isSub) {\n  if (pattern.length > 1024 * 64) {\n    throw new TypeError('pattern is too long')\n  }\n\n  var options = this.options\n\n  // shortcuts\n  if (!options.noglobstar && pattern === '**') return GLOBSTAR\n  if (pattern === '') return ''\n\n  var re = ''\n  var hasMagic = !!options.nocase\n  var escaping = false\n  // ? => one single character\n  var patternListStack = []\n  var negativeLists = []\n  var stateChar\n  var inClass = false\n  var reClassStart = -1\n  var classStart = -1\n  // . and .. never match anything that doesn't start with .,\n  // even when options.dot is set.\n  var patternStart = pattern.charAt(0) === '.' ? '' // anything\n  // not (start or / followed by . or .. followed by / or end)\n  : options.dot ? '(?!(?:^|\\\\\\/)\\\\.{1,2}(?:$|\\\\\\/))'\n  : '(?!\\\\.)'\n  var self = this\n\n  function clearStateChar () {\n    if (stateChar) {\n      // we had some state-tracking character\n      // that wasn't consumed by this pass.\n      switch (stateChar) {\n        case '*':\n          re += star\n          hasMagic = true\n        break\n        case '?':\n          re += qmark\n          hasMagic = true\n        break\n        default:\n          re += '\\\\' + stateChar\n        break\n      }\n      self.debug('clearStateChar %j %j', stateChar, re)\n      stateChar = false\n    }\n  }\n\n  for (var i = 0, len = pattern.length, c\n    ; (i < len) && (c = pattern.charAt(i))\n    ; i++) {\n    this.debug('%s\\t%s %s %j', pattern, i, re, c)\n\n    // skip over any that are escaped.\n    if (escaping && reSpecials[c]) {\n      re += '\\\\' + c\n      escaping = false\n      continue\n    }\n\n    switch (c) {\n      case '/':\n        // completely not allowed, even escaped.\n        // Should already be path-split by now.\n        return false\n\n      case '\\\\':\n        clearStateChar()\n        escaping = true\n      continue\n\n      // the various stateChar values\n      // for the \"extglob\" stuff.\n      case '?':\n      case '*':\n      case '+':\n      case '@':\n      case '!':\n        this.debug('%s\\t%s %s %j <-- stateChar', pattern, i, re, c)\n\n        // all of those are literals inside a class, except that\n        // the glob [!a] means [^a] in regexp\n        if (inClass) {\n          this.debug('  in class')\n          if (c === '!' && i === classStart + 1) c = '^'\n          re += c\n          continue\n        }\n\n        // if we already have a stateChar, then it means\n        // that there was something like ** or +? in there.\n        // Handle the stateChar, then proceed with this one.\n        self.debug('call clearStateChar %j', stateChar)\n        clearStateChar()\n        stateChar = c\n        // if extglob is disabled, then +(asdf|foo) isn't a thing.\n        // just clear the statechar *now*, rather than even diving into\n        // the patternList stuff.\n        if (options.noext) clearStateChar()\n      continue\n\n      case '(':\n        if (inClass) {\n          re += '('\n          continue\n        }\n\n        if (!stateChar) {\n          re += '\\\\('\n          continue\n        }\n\n        patternListStack.push({\n          type: stateChar,\n          start: i - 1,\n          reStart: re.length,\n          open: plTypes[stateChar].open,\n          close: plTypes[stateChar].close\n        })\n        // negation is (?:(?!js)[^/]*)\n        re += stateChar === '!' ? '(?:(?!(?:' : '(?:'\n        this.debug('plType %j %j', stateChar, re)\n        stateChar = false\n      continue\n\n      case ')':\n        if (inClass || !patternListStack.length) {\n          re += '\\\\)'\n          continue\n        }\n\n        clearStateChar()\n        hasMagic = true\n        var pl = patternListStack.pop()\n        // negation is (?:(?!js)[^/]*)\n        // The others are (?:<pattern>)<type>\n        re += pl.close\n        if (pl.type === '!') {\n          negativeLists.push(pl)\n        }\n        pl.reEnd = re.length\n      continue\n\n      case '|':\n        if (inClass || !patternListStack.length || escaping) {\n          re += '\\\\|'\n          escaping = false\n          continue\n        }\n\n        clearStateChar()\n        re += '|'\n      continue\n\n      // these are mostly the same in regexp and glob\n      case '[':\n        // swallow any state-tracking char before the [\n        clearStateChar()\n\n        if (inClass) {\n          re += '\\\\' + c\n          continue\n        }\n\n        inClass = true\n        classStart = i\n        reClassStart = re.length\n        re += c\n      continue\n\n      case ']':\n        //  a right bracket shall lose its special\n        //  meaning and represent itself in\n        //  a bracket expression if it occurs\n        //  first in the list.  -- POSIX.2 2.8.3.2\n        if (i === classStart + 1 || !inClass) {\n          re += '\\\\' + c\n          escaping = false\n          continue\n        }\n\n        // handle the case where we left a class open.\n        // \"[z-a]\" is valid, equivalent to \"\\[z-a\\]\"\n        if (inClass) {\n          // split where the last [ was, make sure we don't have\n          // an invalid re. if so, re-walk the contents of the\n          // would-be class to re-translate any characters that\n          // were passed through as-is\n          // TODO: It would probably be faster to determine this\n          // without a try/catch and a new RegExp, but it's tricky\n          // to do safely.  For now, this is safe and works.\n          var cs = pattern.substring(classStart + 1, i)\n          try {\n            RegExp('[' + cs + ']')\n          } catch (er) {\n            // not a valid class!\n            var sp = this.parse(cs, SUBPARSE)\n            re = re.substr(0, reClassStart) + '\\\\[' + sp[0] + '\\\\]'\n            hasMagic = hasMagic || sp[1]\n            inClass = false\n            continue\n          }\n        }\n\n        // finish up the class.\n        hasMagic = true\n        inClass = false\n        re += c\n      continue\n\n      default:\n        // swallow any state char that wasn't consumed\n        clearStateChar()\n\n        if (escaping) {\n          // no need\n          escaping = false\n        } else if (reSpecials[c]\n          && !(c === '^' && inClass)) {\n          re += '\\\\'\n        }\n\n        re += c\n\n    } // switch\n  } // for\n\n  // handle the case where we left a class open.\n  // \"[abc\" is valid, equivalent to \"\\[abc\"\n  if (inClass) {\n    // split where the last [ was, and escape it\n    // this is a huge pita.  We now have to re-walk\n    // the contents of the would-be class to re-translate\n    // any characters that were passed through as-is\n    cs = pattern.substr(classStart + 1)\n    sp = this.parse(cs, SUBPARSE)\n    re = re.substr(0, reClassStart) + '\\\\[' + sp[0]\n    hasMagic = hasMagic || sp[1]\n  }\n\n  // handle the case where we had a +( thing at the *end*\n  // of the pattern.\n  // each pattern list stack adds 3 chars, and we need to go through\n  // and escape any | chars that were passed through as-is for the regexp.\n  // Go through and escape them, taking care not to double-escape any\n  // | chars that were already escaped.\n  for (pl = patternListStack.pop(); pl; pl = patternListStack.pop()) {\n    var tail = re.slice(pl.reStart + pl.open.length)\n    this.debug('setting tail', re, pl)\n    // maybe some even number of \\, then maybe 1 \\, followed by a |\n    tail = tail.replace(/((?:\\\\{2}){0,64})(\\\\?)\\|/g, function (_, $1, $2) {\n      if (!$2) {\n        // the | isn't already escaped, so escape it.\n        $2 = '\\\\'\n      }\n\n      // need to escape all those slashes *again*, without escaping the\n      // one that we need for escaping the | character.  As it works out,\n      // escaping an even number of slashes can be done by simply repeating\n      // it exactly after itself.  That's why this trick works.\n      //\n      // I am sorry that you have to see this.\n      return $1 + $1 + $2 + '|'\n    })\n\n    this.debug('tail=%j\\n   %s', tail, tail, pl, re)\n    var t = pl.type === '*' ? star\n      : pl.type === '?' ? qmark\n      : '\\\\' + pl.type\n\n    hasMagic = true\n    re = re.slice(0, pl.reStart) + t + '\\\\(' + tail\n  }\n\n  // handle trailing things that only matter at the very end.\n  clearStateChar()\n  if (escaping) {\n    // trailing \\\\\n    re += '\\\\\\\\'\n  }\n\n  // only need to apply the nodot start if the re starts with\n  // something that could conceivably capture a dot\n  var addPatternStart = false\n  switch (re.charAt(0)) {\n    case '.':\n    case '[':\n    case '(': addPatternStart = true\n  }\n\n  // Hack to work around lack of negative lookbehind in JS\n  // A pattern like: *.!(x).!(y|z) needs to ensure that a name\n  // like 'a.xyz.yz' doesn't match.  So, the first negative\n  // lookahead, has to look ALL the way ahead, to the end of\n  // the pattern.\n  for (var n = negativeLists.length - 1; n > -1; n--) {\n    var nl = negativeLists[n]\n\n    var nlBefore = re.slice(0, nl.reStart)\n    var nlFirst = re.slice(nl.reStart, nl.reEnd - 8)\n    var nlLast = re.slice(nl.reEnd - 8, nl.reEnd)\n    var nlAfter = re.slice(nl.reEnd)\n\n    nlLast += nlAfter\n\n    // Handle nested stuff like *(*.js|!(*.json)), where open parens\n    // mean that we should *not* include the ) in the bit that is considered\n    // \"after\" the negated section.\n    var openParensBefore = nlBefore.split('(').length - 1\n    var cleanAfter = nlAfter\n    for (i = 0; i < openParensBefore; i++) {\n      cleanAfter = cleanAfter.replace(/\\)[+*?]?/, '')\n    }\n    nlAfter = cleanAfter\n\n    var dollar = ''\n    if (nlAfter === '' && isSub !== SUBPARSE) {\n      dollar = '$'\n    }\n    var newRe = nlBefore + nlFirst + nlAfter + dollar + nlLast\n    re = newRe\n  }\n\n  // if the re is not \"\" at this point, then we need to make sure\n  // it doesn't match against an empty path part.\n  // Otherwise a/* will match a/, which it should not.\n  if (re !== '' && hasMagic) {\n    re = '(?=.)' + re\n  }\n\n  if (addPatternStart) {\n    re = patternStart + re\n  }\n\n  // parsing just a piece of a larger pattern.\n  if (isSub === SUBPARSE) {\n    return [re, hasMagic]\n  }\n\n  // skip the regexp for non-magical patterns\n  // unescape anything in it, though, so that it'll be\n  // an exact match against a file etc.\n  if (!hasMagic) {\n    return globUnescape(pattern)\n  }\n\n  var flags = options.nocase ? 'i' : ''\n  try {\n    var regExp = new RegExp('^' + re + '$', flags)\n  } catch (er) {\n    // If it was an invalid regular expression, then it can't match\n    // anything.  This trick looks for a character after the end of\n    // the string, which is of course impossible, except in multi-line\n    // mode, but it's not a /m regex.\n    return new RegExp('$.')\n  }\n\n  regExp._glob = pattern\n  regExp._src = re\n\n  return regExp\n}\n\nminimatch.makeRe = function (pattern, options) {\n  return new Minimatch(pattern, options || {}).makeRe()\n}\n\nMinimatch.prototype.makeRe = makeRe\nfunction makeRe () {\n  if (this.regexp || this.regexp === false) return this.regexp\n\n  // at this point, this.set is a 2d array of partial\n  // pattern strings, or \"**\".\n  //\n  // It's better to use .match().  This function shouldn't\n  // be used, really, but it's pretty convenient sometimes,\n  // when you just want to work with a regex.\n  var set = this.set\n\n  if (!set.length) {\n    this.regexp = false\n    return this.regexp\n  }\n  var options = this.options\n\n  var twoStar = options.noglobstar ? star\n    : options.dot ? twoStarDot\n    : twoStarNoDot\n  var flags = options.nocase ? 'i' : ''\n\n  var re = set.map(function (pattern) {\n    return pattern.map(function (p) {\n      return (p === GLOBSTAR) ? twoStar\n      : (typeof p === 'string') ? regExpEscape(p)\n      : p._src\n    }).join('\\\\\\/')\n  }).join('|')\n\n  // must match entire pattern\n  // ending in a * or ** will make it less strict.\n  re = '^(?:' + re + ')$'\n\n  // can match anything, as long as it's not this.\n  if (this.negate) re = '^(?!' + re + ').*$'\n\n  try {\n    this.regexp = new RegExp(re, flags)\n  } catch (ex) {\n    this.regexp = false\n  }\n  return this.regexp\n}\n\nminimatch.match = function (list, pattern, options) {\n  options = options || {}\n  var mm = new Minimatch(pattern, options)\n  list = list.filter(function (f) {\n    return mm.match(f)\n  })\n  if (mm.options.nonull && !list.length) {\n    list.push(pattern)\n  }\n  return list\n}\n\nMinimatch.prototype.match = match\nfunction match (f, partial) {\n  this.debug('match', f, this.pattern)\n  // short-circuit in the case of busted things.\n  // comments, etc.\n  if (this.comment) return false\n  if (this.empty) return f === ''\n\n  if (f === '/' && partial) return true\n\n  var options = this.options\n\n  // windows: need to use /, not \\\n  if (path.sep !== '/') {\n    f = f.split(path.sep).join('/')\n  }\n\n  // treat the test path as a set of pathparts.\n  f = f.split(slashSplit)\n  this.debug(this.pattern, 'split', f)\n\n  // just ONE of the pattern sets in this.set needs to match\n  // in order for it to be valid.  If negating, then just one\n  // match means that we have failed.\n  // Either way, return on the first hit.\n\n  var set = this.set\n  this.debug(this.pattern, 'set', set)\n\n  // Find the basename of the path by looking for the last non-empty segment\n  var filename\n  var i\n  for (i = f.length - 1; i >= 0; i--) {\n    filename = f[i]\n    if (filename) break\n  }\n\n  for (i = 0; i < set.length; i++) {\n    var pattern = set[i]\n    var file = f\n    if (options.matchBase && pattern.length === 1) {\n      file = [filename]\n    }\n    var hit = this.matchOne(file, pattern, partial)\n    if (hit) {\n      if (options.flipNegate) return true\n      return !this.negate\n    }\n  }\n\n  // didn't get any hits.  this is success if it's a negative\n  // pattern, failure otherwise.\n  if (options.flipNegate) return false\n  return this.negate\n}\n\n// set partial to true to test if, for example,\n// \"/a/b\" matches the start of \"/*/b/*/d\"\n// Partial means, if you run out of file before you run\n// out of pattern, then that's fine, as long as all\n// the parts match.\nMinimatch.prototype.matchOne = function (file, pattern, partial) {\n  var options = this.options\n\n  this.debug('matchOne',\n    { 'this': this, file: file, pattern: pattern })\n\n  this.debug('matchOne', file.length, pattern.length)\n\n  for (var fi = 0,\n      pi = 0,\n      fl = file.length,\n      pl = pattern.length\n      ; (fi < fl) && (pi < pl)\n      ; fi++, pi++) {\n    this.debug('matchOne loop')\n    var p = pattern[pi]\n    var f = file[fi]\n\n    this.debug(pattern, p, f)\n\n    // should be impossible.\n    // some invalid regexp stuff in the set.\n    if (p === false) return false\n\n    if (p === GLOBSTAR) {\n      this.debug('GLOBSTAR', [pattern, p, f])\n\n      // \"**\"\n      // a/**/b/**/c would match the following:\n      // a/b/x/y/z/c\n      // a/x/y/z/b/c\n      // a/b/x/b/x/c\n      // a/b/c\n      // To do this, take the rest of the pattern after\n      // the **, and see if it would match the file remainder.\n      // If so, return success.\n      // If not, the ** \"swallows\" a segment, and try again.\n      // This is recursively awful.\n      //\n      // a/**/b/**/c matching a/b/x/y/z/c\n      // - a matches a\n      // - doublestar\n      //   - matchOne(b/x/y/z/c, b/**/c)\n      //     - b matches b\n      //     - doublestar\n      //       - matchOne(x/y/z/c, c) -> no\n      //       - matchOne(y/z/c, c) -> no\n      //       - matchOne(z/c, c) -> no\n      //       - matchOne(c, c) yes, hit\n      var fr = fi\n      var pr = pi + 1\n      if (pr === pl) {\n        this.debug('** at the end')\n        // a ** at the end will just swallow the rest.\n        // We have found a match.\n        // however, it will not swallow /.x, unless\n        // options.dot is set.\n        // . and .. are *never* matched by **, for explosively\n        // exponential reasons.\n        for (; fi < fl; fi++) {\n          if (file[fi] === '.' || file[fi] === '..' ||\n            (!options.dot && file[fi].charAt(0) === '.')) return false\n        }\n        return true\n      }\n\n      // ok, let's see if we can swallow whatever we can.\n      while (fr < fl) {\n        var swallowee = file[fr]\n\n        this.debug('\\nglobstar while', file, fr, pattern, pr, swallowee)\n\n        // XXX remove this slice.  Just pass the start index.\n        if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {\n          this.debug('globstar found match!', fr, fl, swallowee)\n          // found a match.\n          return true\n        } else {\n          // can't swallow \".\" or \"..\" ever.\n          // can only swallow \".foo\" when explicitly asked.\n          if (swallowee === '.' || swallowee === '..' ||\n            (!options.dot && swallowee.charAt(0) === '.')) {\n            this.debug('dot detected!', file, fr, pattern, pr)\n            break\n          }\n\n          // ** swallows a segment, and continue.\n          this.debug('globstar swallow a segment, and continue')\n          fr++\n        }\n      }\n\n      // no match was found.\n      // However, in partial mode, we can't say this is necessarily over.\n      // If there's more *pattern* left, then\n      if (partial) {\n        // ran out of file\n        this.debug('\\n>>> no match, partial?', file, fr, pattern, pr)\n        if (fr === fl) return true\n      }\n      return false\n    }\n\n    // something other than **\n    // non-magic patterns just have to match exactly\n    // patterns with magic have been turned into regexps.\n    var hit\n    if (typeof p === 'string') {\n      if (options.nocase) {\n        hit = f.toLowerCase() === p.toLowerCase()\n      } else {\n        hit = f === p\n      }\n      this.debug('string match', p, f, hit)\n    } else {\n      hit = f.match(p)\n      this.debug('pattern match', p, f, hit)\n    }\n\n    if (!hit) return false\n  }\n\n  // Note: ending in / means that we'll get a final \"\"\n  // at the end of the pattern.  This can only match a\n  // corresponding \"\" at the end of the file.\n  // If the file ends in /, then it can only match a\n  // a pattern that ends in /, unless the pattern just\n  // doesn't have any more for it. But, a/b/ should *not*\n  // match \"a/b/*\", even though \"\" matches against the\n  // [^/]*? pattern, except in partial mode, where it might\n  // simply not be reached yet.\n  // However, a/b/ should still satisfy a/*\n\n  // now either we fell off the end of the pattern, or we're done.\n  if (fi === fl && pi === pl) {\n    // ran out of pattern and filename at the same time.\n    // an exact hit!\n    return true\n  } else if (fi === fl) {\n    // ran out of file, but still had pattern left.\n    // this is ok if we're doing the match as part of\n    // a glob fs traversal.\n    return partial\n  } else if (pi === pl) {\n    // ran out of pattern, still have file left.\n    // this is only acceptable if we're on the very last\n    // empty segment of a file with a trailing slash.\n    // a/* should match a/b/\n    var emptyFileEnd = (fi === fl - 1) && (file[fi] === '')\n    return emptyFileEnd\n  }\n\n  // should be unreachable.\n  throw new Error('wtf?')\n}\n\n// replace stuff like \\* with *\nfunction globUnescape (s) {\n  return s.replace(/\\\\(.)/g, '$1')\n}\n\nfunction regExpEscape (s) {\n  return s.replace(/[-[\\]{}()*+?.,\\\\^$|#\\s]/g, '\\\\$&')\n}\n","var Path = require('../path.js');\nvar Errors = require('../errors.js');\nvar Environment = require('./environment.js');\nvar async = require('../../lib/async.js');\nvar Encoding = require('../encoding.js');\nvar minimatch = require('minimatch');\n\nfunction Shell(fs, options) {\n  options = options || {};\n\n  var env = new Environment(options.env);\n  var cwd = '/';\n\n  /**\n   * The bound FileSystem (cannot be changed)\n   */\n  Object.defineProperty(this, 'fs', {\n    get: function() { return fs; },\n    enumerable: true\n  });\n\n  /**\n   * The shell's environment (e.g., for things like\n   * path, tmp, and other env vars). Use env.get()\n   * and env.set() to work with variables.\n   */\n  Object.defineProperty(this, 'env', {\n    get: function() { return env; },\n    enumerable: true\n  });\n\n  /**\n   * Change the current working directory. We\n   * include `cd` on the `this` vs. proto so that\n   * we can access cwd without exposing it externally.\n   */\n  this.cd = function(path, callback) {\n    path = Path.resolve(cwd, path);\n    // Make sure the path actually exists, and is a dir\n    fs.stat(path, function(err, stats) {\n      if(err) {\n        callback(new Errors.ENOTDIR(null, path));\n        return;\n      }\n      if(stats.type === 'DIRECTORY') {\n        cwd = path;\n        callback();\n      } else {\n        callback(new Errors.ENOTDIR(null, path));\n      }\n    });\n  };\n\n  /**\n   * Get the current working directory (changed with `cd()`)\n   */\n  this.pwd = function() {\n    return cwd;\n  };\n}\n\n/**\n * Execute the .js command located at `path`. Such commands\n * should assume the existence of 3 arguments, which will be\n * defined at runtime:\n *\n *   * fs - the current shell's bound filesystem object\n *   * args - a list of arguments for the command, or an empty list if none\n *   * callback - a callback function(error, result) to call when done.\n *\n * The .js command's contents should be the body of a function\n * that looks like this:\n *\n * function(fs, args, callback) {\n *   // .js code here\n * }\n */\nShell.prototype.exec = function(path, args, callback) {\n  /* jshint evil:true */\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof args === 'function') {\n    callback = args;\n    args = [];\n  }\n  args = args || [];\n  callback = callback || function(){};\n  path = Path.resolve(sh.pwd(), path);\n\n  fs.readFile(path, \"utf8\", function(error, data) {\n    if(error) {\n      callback(error);\n      return;\n    }\n    try {\n      var cmd = new Function('fs', 'args', 'callback', data);\n      cmd(fs, args, callback);\n    } catch(e) {\n      callback(e);\n    }\n  });\n};\n\n/**\n * Create a file if it does not exist, or update access and\n * modified times if it does. Valid options include:\n *\n *  * updateOnly - whether to create the file if missing (defaults to false)\n *  * date - use the provided Date value instead of current date/time\n */\nShell.prototype.touch = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n  path = Path.resolve(sh.pwd(), path);\n\n  function createFile(path) {\n    fs.writeFile(path, '', callback);\n  }\n\n  function updateTimes(path) {\n    var now = Date.now();\n    var atime = options.date || now;\n    var mtime = options.date || now;\n\n    fs.utimes(path, atime, mtime, callback);\n  }\n\n  fs.stat(path, function(error, stats) {\n    if(error) {\n      if(options.updateOnly === true) {\n        callback();\n      } else {\n        createFile(path);\n      }\n    } else {\n      updateTimes(path);\n    }\n  });\n};\n\n/**\n * Concatenate multiple files into a single String, with each\n * file separated by a newline. The `files` argument should\n * be a String (path to single file) or an Array of Strings\n * (multiple file paths).\n */\nShell.prototype.cat = function(files, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  var all = '';\n  callback = callback || function(){};\n\n  if(!files) {\n    callback(new Errors.EINVAL('Missing files argument'));\n    return;\n  }\n\n  files = typeof files === 'string' ? [ files ] : files;\n\n  function append(item, callback) {\n    var filename = Path.resolve(sh.pwd(), item);\n    fs.readFile(filename, 'utf8', function(error, data) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      all += data + '\\n';\n      callback();\n    });\n  }\n\n  async.eachSeries(files, append, function(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, all.replace(/\\n$/, ''));\n    }\n  });\n};\n\n/**\n * Get the listing of a directory, returning an array of\n * file entries in the following form:\n *\n * {\n *   path: <String> the basename of the directory entry\n *   links: <Number> the number of links to the entry\n *   size: <Number> the size in bytes of the entry\n *   modified: <Number> the last modified date/time\n *   type: <String> the type of the entry\n *   contents: <Array> an optional array of child entries\n * }\n *\n * By default ls() gives a shallow listing. If you want\n * to follow directories as they are encountered, use\n * the `recursive=true` option.\n */\nShell.prototype.ls = function(dir, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  if(!dir) {\n    callback(new Errors.EINVAL('Missing dir argument'));\n    return;\n  }\n\n  function list(path, callback) {\n    var pathname = Path.resolve(sh.pwd(), path);\n    var result = [];\n\n    fs.readdir(pathname, function(error, entries) {\n      if(error) {\n        callback(error);\n        return;\n      }\n\n      function getDirEntry(name, callback) {\n        name = Path.join(pathname, name);\n        fs.stat(name, function(error, stats) {\n          if(error) {\n            callback(error);\n            return;\n          }\n          var entry = stats;\n\n          if(options.recursive && stats.type === 'DIRECTORY') {\n            list(Path.join(pathname, entry.name), function(error, items) {\n              if(error) {\n                callback(error);\n                return;\n              }\n              entry.contents = items;\n              result.push(entry);\n              callback();\n            });\n          } else {\n            result.push(entry);\n            callback();\n          }\n        });\n      }\n\n      async.eachSeries(entries, getDirEntry, function(error) {\n        callback(error, result);\n      });\n    });\n  }\n\n  list(dir, callback);\n};\n\n/**\n * Removes the file or directory at `path`. If `path` is a file\n * it will be removed. If `path` is a directory, it will be\n * removed if it is empty, otherwise the callback will receive\n * an error. In order to remove non-empty directories, use the\n * `recursive=true` option.\n */\nShell.prototype.rm = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n\n  function remove(pathname, callback) {\n    pathname = Path.resolve(sh.pwd(), pathname);\n    fs.stat(pathname, function(error, stats) {\n      if(error) {\n        callback(error);\n        return;\n      }\n\n      // If this is a file, delete it and we're done\n      if(stats.type === 'FILE') {\n        fs.unlink(pathname, callback);\n        return;\n      }\n\n      // If it's a dir, check if it's empty\n      fs.readdir(pathname, function(error, entries) {\n        if(error) {\n          callback(error);\n          return;\n        }\n\n        // If dir is empty, delete it and we're done\n        if(entries.length === 0) {\n          fs.rmdir(pathname, callback);\n          return;\n        }\n\n        // If not, see if we're allowed to delete recursively\n        if(!options.recursive) {\n          callback(new Errors.ENOTEMPTY(null, pathname));\n          return;\n        }\n\n        // Remove each dir entry recursively, then delete the dir.\n        entries = entries.map(function(filename) {\n          // Root dir entries absolutely\n          return Path.join(pathname, filename);\n        });\n        async.eachSeries(entries, remove, function(error) {\n          if(error) {\n            callback(error);\n            return;\n          }\n          fs.rmdir(pathname, callback);\n        });\n      });\n    });\n  }\n\n  remove(path, callback);\n};\n\n/**\n * Gets the path to the temporary directory, creating it if not\n * present. The directory used is the one specified in\n * env.TMP. The callback receives (error, tempDirName).\n */\nShell.prototype.tempDir = function(callback) {\n  var sh = this;\n  var fs = sh.fs;\n  var tmp = sh.env.get('TMP');\n  callback = callback || function(){};\n\n  // Try and create it, and it will either work or fail\n  // but either way it's now there.\n  fs.mkdir(tmp, function(err) {\n    callback(null, tmp);\n  });\n};\n\n/**\n * Recursively creates the directory at `path`. If the parent\n * of `path` does not exist, it will be created.\n * Based off EnsureDir by Sam X. Xu\n * https://www.npmjs.org/package/ensureDir\n * MIT License\n */\nShell.prototype.mkdirp = function(path, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  callback = callback || function(){};\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n  else if (path === '/') {\n    callback();\n    return;\n  }\n  function _mkdirp(path, callback) {\n    fs.stat(path, function (err, stat) {\n      if(stat) {\n        if(stat.isDirectory()) {\n          callback();\n          return;\n        }\n        else if (stat.isFile()) {\n          callback(new Errors.ENOTDIR(null, path));\n          return;\n        }\n      }\n      else if (err && err.code !== 'ENOENT') {\n        callback(err);\n        return;\n      }\n      else {\n        var parent = Path.dirname(path);\n        if(parent === '/') {\n          fs.mkdir(path, function (err) {\n            if (err && err.code != 'EEXIST') {\n              callback(err);\n              return;\n            }\n            callback();\n            return;\n          });\n        }\n        else {\n          _mkdirp(parent, function (err) {\n            if (err) return callback(err);\n            fs.mkdir(path, function (err) {\n              if (err && err.code != 'EEXIST') {\n                callback(err);\n                return;\n              }\n              callback();\n              return;\n            });\n          });\n        }\n      }\n    });\n  }\n\n  _mkdirp(path, callback);\n};\n\n/**\n * Recursively walk a directory tree, reporting back all paths\n * that were found along the way. The `path` must be a dir.\n * Valid options include a `regex` for pattern matching paths\n * and an `exec` function of the form `function(path, next)` where\n * `path` is the current path that was found (dir paths have an '/'\n * appended) and `next` is a callback to call when done processing\n * the current path, passing any error object back as the first argument.\n * `find` returns a flat array of absolute paths for all matching/found\n * paths as the final argument to the callback.\n */\n Shell.prototype.find = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  var exec = options.exec || function(path, next) { next(); };\n  var found = [];\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n\n  function processPath(path, callback) {\n    exec(path, function(err) {\n      if(err) {\n        callback(err);\n        return;\n      }\n\n      found.push(path);\n      callback();\n    });\n  }\n\n  function maybeProcessPath(path, callback) {\n    // Test the path against the user's regex, name, path primaries (if any)\n    // and remove any trailing slashes added previously.\n    var rawPath = Path.removeTrailing(path);\n\n    // Check entire path against provided regex, if any\n    if(options.regex && !options.regex.test(rawPath)) {\n      callback();\n      return;\n    }\n\n    // Check basename for matches against name primary, if any\n    if(options.name && !minimatch(Path.basename(rawPath), options.name)) {\n      callback();\n      return;\n    }\n\n    // Check dirname for matches against path primary, if any\n    if(options.path && !minimatch(Path.dirname(rawPath), options.path)) {\n      callback();\n      return;\n    }\n\n    processPath(path, callback);\n  }\n\n  function walk(path, callback) {\n    path = Path.resolve(sh.pwd(), path);\n\n    // The path is either a file or dir, and instead of doing\n    // a stat() to determine it first, we just try to readdir()\n    // and it will either work or not, and we handle the non-dir error.\n    fs.readdir(path, function(err, entries) {\n      if(err) {\n        if(err.code === 'ENOTDIR' /* file case, ignore error */) {\n          maybeProcessPath(path, callback);\n        } else {\n          callback(err);\n        }\n        return;\n      }\n\n      // Path is really a dir, add a trailing / and report it found\n      maybeProcessPath(Path.addTrailing(path), function(err) {\n        if(err) {\n          callback(err);\n          return;\n        }\n\n        entries = entries.map(function(entry) {\n          return Path.join(path, entry);\n        });\n\n        async.eachSeries(entries, walk, function(err) {\n          callback(err, found);\n        });\n      });\n    });\n  }\n\n  // Make sure we are starting with a dir path\n  fs.stat(path, function(err, stats) {\n    if(err) {\n      callback(err);\n      return;\n    }\n    if(!stats.isDirectory()) {\n      callback(new Errors.ENOTDIR(null, path));\n      return;\n    }\n\n    walk(path, callback);\n  });\n};\n\nmodule.exports = Shell;\n","// Based on https://github.com/diy/intercom.js/blob/master/lib/events.js\n// Copyright 2012 DIY Co Apache License, Version 2.0\n// http://www.apache.org/licenses/LICENSE-2.0\n\nfunction removeItem(item, array) {\n  for (var i = array.length - 1; i >= 0; i--) {\n    if (array[i] === item) {\n      array.splice(i, 1);\n    }\n  }\n  return array;\n}\n\nvar EventEmitter = function() {};\n\nEventEmitter.createInterface = function(space) {\n  var methods = {};\n\n  methods.on = function(name, fn) {\n    if (typeof this[space] === 'undefined') {\n      this[space] = {};\n    }\n    if (!this[space].hasOwnProperty(name)) {\n      this[space][name] = [];\n    }\n    this[space][name].push(fn);\n  };\n\n  methods.off = function(name, fn) {\n    if (typeof this[space] === 'undefined') return;\n    if (this[space].hasOwnProperty(name)) {\n      removeItem(fn, this[space][name]);\n    }\n  };\n\n  methods.trigger = function(name) {\n    if (typeof this[space] !== 'undefined' && this[space].hasOwnProperty(name)) {\n      var args = Array.prototype.slice.call(arguments, 1);\n      for (var i = 0; i < this[space][name].length; i++) {\n        this[space][name][i].apply(this[space][name][i], args);\n      }\n    }\n  };\n\n  methods.removeAllListeners = function(name) {\n    if (typeof this[space] === 'undefined') return;\n    var self = this;\n    self[space][name].forEach(function(fn) {\n      self.off(name, fn);\n    });\n  };\n\n  return methods;\n};\n\nvar pvt = EventEmitter.createInterface('_handlers');\nEventEmitter.prototype._on = pvt.on;\nEventEmitter.prototype._off = pvt.off;\nEventEmitter.prototype._trigger = pvt.trigger;\n\nvar pub = EventEmitter.createInterface('handlers');\nEventEmitter.prototype.on = function() {\n  pub.on.apply(this, arguments);\n  Array.prototype.unshift.call(arguments, 'on');\n  this._trigger.apply(this, arguments);\n};\nEventEmitter.prototype.off = pub.off;\nEventEmitter.prototype.trigger = pub.trigger;\nEventEmitter.prototype.removeAllListeners = pub.removeAllListeners;\n\nmodule.exports = EventEmitter;\n","// Based on https://github.com/diy/intercom.js/blob/master/lib/intercom.js\n// Copyright 2012 DIY Co Apache License, Version 2.0\n// http://www.apache.org/licenses/LICENSE-2.0\n\nvar EventEmitter = require('./eventemitter.js');\nvar guid = require('../src/shared.js').guid;\n\nfunction throttle(delay, fn) {\n  var last = 0;\n  return function() {\n    var now = Date.now();\n    if (now - last > delay) {\n      last = now;\n      fn.apply(this, arguments);\n    }\n  };\n}\n\nfunction extend(a, b) {\n  if (typeof a === 'undefined' || !a) { a = {}; }\n  if (typeof b === 'object') {\n    for (var key in b) {\n      if (b.hasOwnProperty(key)) {\n        a[key] = b[key];\n      }\n    }\n  }\n  return a;\n}\n\nvar localStorage = (function(window) {\n  if (typeof window === 'undefined' ||\n      typeof window.localStorage === 'undefined') {\n    return {\n      getItem : function() {},\n      setItem : function() {},\n      removeItem : function() {}\n    };\n  }\n  return window.localStorage;\n}(global));\n\nfunction Intercom() {\n  var self = this;\n  var now = Date.now();\n\n  this.origin         = guid();\n  this.lastMessage    = now;\n  this.receivedIDs    = {};\n  this.previousValues = {};\n\n  var storageHandler = function() {\n    self._onStorageEvent.apply(self, arguments);\n  };\n\n  // If we're in node.js, skip event registration\n  if (typeof document === 'undefined') {\n    return;\n  }\n\n  if (document.attachEvent) {\n    document.attachEvent('onstorage', storageHandler);\n  } else {\n    global.addEventListener('storage', storageHandler, false);\n  }\n}\n\nIntercom.prototype._transaction = function(fn) {\n  var TIMEOUT   = 1000;\n  var WAIT      = 20;\n  var self      = this;\n  var executed  = false;\n  var listening = false;\n  var waitTimer = null;\n\n  function lock() {\n    if (executed) {\n      return;\n    }\n\n    var now = Date.now();\n    var activeLock = localStorage.getItem(INDEX_LOCK)|0;\n    if (activeLock && now - activeLock < TIMEOUT) {\n      if (!listening) {\n        self._on('storage', lock);\n        listening = true;\n      }\n      waitTimer = setTimeout(lock, WAIT);\n      return;\n    }\n    executed = true;\n    localStorage.setItem(INDEX_LOCK, now);\n\n    fn();\n    unlock();\n  }\n\n  function unlock() {\n    if (listening) {\n      self._off('storage', lock);\n    }\n    if (waitTimer) {\n      clearTimeout(waitTimer);\n    }\n    localStorage.removeItem(INDEX_LOCK);\n  }\n\n  lock();\n};\n\nIntercom.prototype._cleanup_emit = throttle(100, function() {\n  var self = this;\n\n  self._transaction(function() {\n    var now = Date.now();\n    var threshold = now - THRESHOLD_TTL_EMIT;\n    var changed = 0;\n    var messages;\n\n    try {\n      messages = JSON.parse(localStorage.getItem(INDEX_EMIT) || '[]');\n    } catch(e) {\n      messages = [];\n    }\n    for (var i = messages.length - 1; i >= 0; i--) {\n      if (messages[i].timestamp < threshold) {\n        messages.splice(i, 1);\n        changed++;\n      }\n    }\n    if (changed > 0) {\n      localStorage.setItem(INDEX_EMIT, JSON.stringify(messages));\n    }\n  });\n});\n\nIntercom.prototype._cleanup_once = throttle(100, function() {\n  var self = this;\n\n  self._transaction(function() {\n    var timestamp, ttl, key;\n    var table;\n    var now  = Date.now();\n    var changed = 0;\n\n    try {\n      table = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');\n    } catch(e) {\n      table = {};\n    }\n    for (key in table) {\n      if (self._once_expired(key, table)) {\n        delete table[key];\n        changed++;\n      }\n    }\n\n    if (changed > 0) {\n      localStorage.setItem(INDEX_ONCE, JSON.stringify(table));\n    }\n  });\n});\n\nIntercom.prototype._once_expired = function(key, table) {\n  if (!table) {\n    return true;\n  }\n  if (!table.hasOwnProperty(key)) {\n    return true;\n  }\n  if (typeof table[key] !== 'object') {\n    return true;\n  }\n\n  var ttl = table[key].ttl || THRESHOLD_TTL_ONCE;\n  var now = Date.now();\n  var timestamp = table[key].timestamp;\n  return timestamp < now - ttl;\n};\n\nIntercom.prototype._localStorageChanged = function(event, field) {\n  if (event && event.key) {\n    return event.key === field;\n  }\n\n  var currentValue = localStorage.getItem(field);\n  if (currentValue === this.previousValues[field]) {\n    return false;\n  }\n  this.previousValues[field] = currentValue;\n  return true;\n};\n\nIntercom.prototype._onStorageEvent = function(event) {\n  event = event || global.event;\n  var self = this;\n\n  if (this._localStorageChanged(event, INDEX_EMIT)) {\n    this._transaction(function() {\n      var now = Date.now();\n      var data = localStorage.getItem(INDEX_EMIT);\n      var messages;\n\n      try {\n        messages = JSON.parse(data || '[]');\n      } catch(e) {\n        messages = [];\n      }\n      for (var i = 0; i < messages.length; i++) {\n        if (messages[i].origin === self.origin) continue;\n        if (messages[i].timestamp < self.lastMessage) continue;\n        if (messages[i].id) {\n          if (self.receivedIDs.hasOwnProperty(messages[i].id)) continue;\n          self.receivedIDs[messages[i].id] = true;\n        }\n        self.trigger(messages[i].name, messages[i].payload);\n      }\n      self.lastMessage = now;\n    });\n  }\n\n  this._trigger('storage', event);\n};\n\nIntercom.prototype._emit = function(name, message, id) {\n  id = (typeof id === 'string' || typeof id === 'number') ? String(id) : null;\n  if (id && id.length) {\n    if (this.receivedIDs.hasOwnProperty(id)) return;\n    this.receivedIDs[id] = true;\n  }\n\n  var packet = {\n    id        : id,\n    name      : name,\n    origin    : this.origin,\n    timestamp : Date.now(),\n    payload   : message\n  };\n\n  var self = this;\n  this._transaction(function() {\n    var data = localStorage.getItem(INDEX_EMIT) || '[]';\n    var delimiter = (data === '[]') ? '' : ',';\n    data = [data.substring(0, data.length - 1), delimiter, JSON.stringify(packet), ']'].join('');\n    localStorage.setItem(INDEX_EMIT, data);\n    self.trigger(name, message);\n\n    setTimeout(function() {\n      self._cleanup_emit();\n    }, 50);\n  });\n};\n\nIntercom.prototype.emit = function(name, message) {\n  this._emit.apply(this, arguments);\n  this._trigger('emit', name, message);\n};\n\nIntercom.prototype.once = function(key, fn, ttl) {\n  if (!Intercom.supported) {\n    return;\n  }\n\n  var self = this;\n  this._transaction(function() {\n    var data;\n    try {\n      data = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');\n    } catch(e) {\n      data = {};\n    }\n    if (!self._once_expired(key, data)) {\n      return;\n    }\n\n    data[key] = {};\n    data[key].timestamp = Date.now();\n    if (typeof ttl === 'number') {\n      data[key].ttl = ttl * 1000;\n    }\n\n    localStorage.setItem(INDEX_ONCE, JSON.stringify(data));\n    fn();\n\n    setTimeout(function() {\n      self._cleanup_once();\n    }, 50);\n  });\n};\n\nextend(Intercom.prototype, EventEmitter.prototype);\n\nIntercom.supported = (typeof localStorage !== 'undefined');\n\nvar INDEX_EMIT = 'intercom';\nvar INDEX_ONCE = 'intercom_once';\nvar INDEX_LOCK = 'intercom_lock';\n\nvar THRESHOLD_TTL_EMIT = 50000;\nvar THRESHOLD_TTL_ONCE = 1000 * 3600;\n\nIntercom.destroy = function() {\n  localStorage.removeItem(INDEX_LOCK);\n  localStorage.removeItem(INDEX_EMIT);\n  localStorage.removeItem(INDEX_ONCE);\n};\n\nIntercom.getInstance = (function() {\n  var intercom;\n  return function() {\n    if (!intercom) {\n      intercom = new Intercom();\n    }\n    return intercom;\n  };\n})();\n\nmodule.exports = Intercom;\n","var EventEmitter = require('../lib/eventemitter.js');\nvar Path = require('./path.js');\nvar Intercom = require('../lib/intercom.js');\n\n/**\n * FSWatcher based on node.js' FSWatcher\n * see https://github.com/joyent/node/blob/master/lib/fs.js\n */\nfunction FSWatcher() {\n  EventEmitter.call(this);\n  var self = this;\n  var recursive = false;\n  var recursivePathPrefix;\n  var filename;\n\n  function onchange(path) {\n    // Watch for exact filename, or parent path when recursive is true.\n    if(filename === path || (recursive && path.indexOf(recursivePathPrefix) === 0)) {\n      self.trigger('change', 'change', path);\n    }\n  }\n\n  // We support, but ignore the second arg, which node.js uses.\n  self.start = function(filename_, persistent_, recursive_) {\n    // Bail if we've already started (and therefore have a filename);\n    if(filename) {\n      return;\n    }\n\n    if(Path.isNull(filename_)) {\n      throw new Error('Path must be a string without null bytes.');\n    }\n\n    // TODO: get realpath for symlinks on filename...\n\n    // Filer's Path.normalize strips trailing slashes, which we use here.\n    // See https://github.com/js-platform/filer/issues/105\n    filename = Path.normalize(filename_);\n\n    // Whether to watch beneath this path or not\n    recursive = recursive_ === true;\n    // If recursive, construct a path prefix portion for comparisons later\n    // (i.e., '/path' becomes '/path/' so we can search within a filename for the\n    // prefix). We also take care to allow for '/' on its own.\n    if(recursive) {\n      recursivePathPrefix = filename === '/' ? '/' : filename + '/';\n    }\n\n    var intercom = Intercom.getInstance();\n    intercom.on('change', onchange);\n  };\n\n  self.close = function() {\n    var intercom = Intercom.getInstance();\n    intercom.off('change', onchange);\n    self.removeAllListeners('change');\n  };\n}\nFSWatcher.prototype = new EventEmitter();\nFSWatcher.prototype.constructor = FSWatcher;\n\nmodule.exports = FSWatcher;\n","var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;\n\nmodule.exports = function DirectoryEntry(id, type) {\n  this.id = id;\n  this.type = type || NODE_TYPE_FILE;\n};\n","var Errors = require('./errors.js');\n\nfunction OpenFileDescription(path, id, flags, position) {\n  this.path = path;\n  this.id = id;\n  this.flags = flags;\n  this.position = position;\n}\n\n// Tries to find the node associated with an ofd's `id`.\n// If not found, an error is returned on the callback.\nOpenFileDescription.prototype.getNode = function(context, callback) {\n  var id = this.id;\n  var path = this.path;\n\n  function check_if_node_exists(error, node) {\n    if(error) {\n      return callback(error);\n    }\n\n    if(!node) {\n      return callback(new Errors.EBADF('file descriptor refers to unknown node', path));\n    }\n\n    callback(null, node);\n  }\n\n  context.getObject(id, check_if_node_exists);\n};\n\nmodule.exports = OpenFileDescription;\n","var Constants = require('./constants.js');\n\nfunction SuperNode(options) {\n  var now = Date.now();\n\n  this.id = Constants.SUPER_NODE_ID;\n  this.type = Constants.NODE_TYPE_META;\n  this.atime = options.atime || now;\n  this.ctime = options.ctime || now;\n  this.mtime = options.mtime || now;\n  // root node id (randomly generated)\n  this.rnode = options.rnode;\n}\n\nSuperNode.create = function(options, callback) {\n  options.guid(function(err, rnode) {\n    if(err) {\n      callback(err);\n      return;\n    }\n    options.rnode = options.rnode || rnode;\n    callback(null, new SuperNode(options));\n  });\n};\n\nmodule.exports = SuperNode;\n","var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;\nvar NODE_TYPE_DIRECTORY = require('./constants.js').NODE_TYPE_DIRECTORY;\nvar NODE_TYPE_SYMBOLIC_LINK = require('./constants.js').NODE_TYPE_SYMBOLIC_LINK;\nvar NODE_TYPE_META = require('./constants.js').NODE_TYPE_META;\n\nvar ROOT_DIRECTORY_NAME = require('./constants.js').ROOT_DIRECTORY_NAME;\n\nvar S_IFREG = require('./constants.js').S_IFREG;\nvar S_IFDIR = require('./constants.js').S_IFDIR;\nvar S_IFLNK = require('./constants.js').S_IFLNK;\n\nvar DEFAULT_FILE_PERMISSIONS = require('./constants.js').DEFAULT_FILE_PERMISSIONS;\nvar DEFAULT_DIR_PERMISSIONS = require('./constants.js').DEFAULT_DIR_PERMISSIONS;\n\nfunction getMode(type, mode) {\n  switch(type) {\n    case NODE_TYPE_DIRECTORY:\n      return (mode || DEFAULT_DIR_PERMISSIONS) | S_IFDIR;\n    case NODE_TYPE_SYMBOLIC_LINK:\n      return (mode || DEFAULT_FILE_PERMISSIONS) | S_IFLNK;\n    /* jshint -W086 */\n    case NODE_TYPE_FILE:\n      // falls through\n    default:\n      return (mode || DEFAULT_FILE_PERMISSIONS) | S_IFREG;\n  }\n}\n\nfunction Node(options) {\n  var now = Date.now();\n\n  this.id = options.id;\n  this.type = options.type || NODE_TYPE_FILE;  // node type (file, directory, etc)\n  this.size = options.size || 0; // size (bytes for files, entries for directories)\n  this.atime = options.atime || now; // access time (will mirror ctime after creation)\n  this.ctime = options.ctime || now; // creation/change time\n  this.mtime = options.mtime || now; // modified time\n  this.flags = options.flags || []; // file flags\n  this.xattrs = options.xattrs || {}; // extended attributes\n  this.nlinks = options.nlinks || 0; // links count\n  this.data = options.data; // id for data object\n  this.version = options.version || 1;\n\n  // permissions and flags\n  this.mode = options.mode || (getMode(this.type));\n  this.uid = options.uid || 0x0; // owner name\n  this.gid = options.gid || 0x0; // group name\n}\n\n// Make sure the options object has an id on property,\n// either from caller or one we generate using supplied guid fn.\nfunction ensureID(options, prop, callback) {\n  if(options[prop]) {\n    callback(null);\n  } else {\n    options.guid(function(err, id) {\n      options[prop] = id;\n      callback(err);\n    });\n  }\n}\n\nNode.create = function(options, callback) {\n  // We expect both options.id and options.data to be provided/generated.\n  ensureID(options, 'id', function(err) {\n    if(err) {\n      callback(err);\n      return;\n    }\n\n    ensureID(options, 'data', function(err) {\n      if(err) {\n        callback(err);\n        return;\n      }\n\n      callback(null, new Node(options));\n    });\n  });\n};\n\n// Update the node's mode (permissions), taking file type bits into account.\nNode.setMode = function(mode, node) {\n  node.mode = getMode(node.type, mode);\n};\n\nmodule.exports = Node;\n","var Constants = require('./constants.js');\nvar Path = require('./path.js');\n\nfunction Stats(path, fileNode, devName) {\n  this.dev = devName;\n  this.node = fileNode.id;\n  this.type = fileNode.type;\n  this.size = fileNode.size;\n  this.nlinks = fileNode.nlinks;\n  this.atime = fileNode.atime;\n  this.mtime = fileNode.mtime;\n  this.ctime = fileNode.ctime;\n  this.version = fileNode.version;\n  this.mode = fileNode.mode;\n  this.uid = fileNode.uid;\n  this.gid = fileNode.gid;\n  this.name = Path.basename(path);\n}\n\nStats.prototype.isFile = function() {\n  return this.type === Constants.NODE_TYPE_FILE;\n};\n\nStats.prototype.isDirectory = function() {\n  return this.type === Constants.NODE_TYPE_DIRECTORY;\n};\n\nStats.prototype.isSymbolicLink = function() {\n  return this.type === Constants.NODE_TYPE_SYMBOLIC_LINK;\n};\n\n// These will always be false in Filer.\nStats.prototype.isSocket          =\nStats.prototype.isFIFO            =\nStats.prototype.isCharacterDevice =\nStats.prototype.isBlockDevice     =\nfunction() {\n  return false;\n};\n\nmodule.exports = Stats;\n","var _ = require('../../lib/nodash.js');\n\nvar Path = require('../path.js');\nvar normalize = Path.normalize;\nvar dirname = Path.dirname;\nvar basename = Path.basename;\nvar isAbsolutePath = Path.isAbsolute;\nvar isNullPath = Path.isNull;\n\nvar Constants = require('../constants.js');\nvar NODE_TYPE_FILE = Constants.NODE_TYPE_FILE;\nvar NODE_TYPE_DIRECTORY = Constants.NODE_TYPE_DIRECTORY;\nvar NODE_TYPE_SYMBOLIC_LINK = Constants.NODE_TYPE_SYMBOLIC_LINK;\nvar NODE_TYPE_META = Constants.NODE_TYPE_META;\n\nvar DEFAULT_FILE_PERMISSIONS = Constants.DEFAULT_FILE_PERMISSIONS;\nvar DEFAULT_DIR_PERMISSIONS = Constants.DEFAULT_DIR_PERMISSIONS;\nvar FULL_READ_WRITE_EXEC_PERMISSIONS = Constants.FULL_READ_WRITE_EXEC_PERMISSIONS;\n\nvar ROOT_DIRECTORY_NAME = Constants.ROOT_DIRECTORY_NAME;\nvar SUPER_NODE_ID = Constants.SUPER_NODE_ID;\nvar SYMLOOP_MAX = Constants.SYMLOOP_MAX;\n\nvar O_READ = Constants.O_READ;\nvar O_WRITE = Constants.O_WRITE;\nvar O_CREATE = Constants.O_CREATE;\nvar O_EXCLUSIVE = Constants.O_EXCLUSIVE;\nvar O_TRUNCATE = Constants.O_TRUNCATE;\nvar O_APPEND = Constants.O_APPEND;\nvar O_FLAGS = Constants.O_FLAGS;\n\nvar XATTR_CREATE = Constants.XATTR_CREATE;\nvar XATTR_REPLACE = Constants.XATTR_REPLACE;\nvar FS_NOMTIME = Constants.FS_NOMTIME;\nvar FS_NOCTIME = Constants.FS_NOCTIME;\n\nvar Encoding = require('../encoding.js');\nvar Errors = require('../errors.js');\nvar DirectoryEntry = require('../directory-entry.js');\nvar OpenFileDescription = require('../open-file-description.js');\nvar SuperNode = require('../super-node.js');\nvar Node = require('../node.js');\nvar Stats = require('../stats.js');\nvar Buffer = require('../buffer.js');\n\n/**\n * Update node times. Only passed times are modified (undefined times are ignored)\n * and filesystem flags are examined in order to override update logic.\n */\nfunction update_node_times(context, path, node, times, callback) {\n  // Honour mount flags for how we update times\n  var flags = context.flags;\n  if(_(flags).contains(FS_NOCTIME)) {\n    delete times.ctime;\n  }\n  if(_(flags).contains(FS_NOMTIME)) {\n    delete times.mtime;\n  }\n\n  // Only do the update if required (i.e., times are still present)\n  var update = false;\n  if(times.ctime) {\n    node.ctime = times.ctime;\n    // We don't do atime tracking for perf reasons, but do mirror ctime\n    node.atime = times.ctime;\n    update = true;\n  }\n  if(times.atime) {\n    // The only time we explicitly pass atime is when utimes(), futimes() is called.\n    // Override ctime mirror here if so\n    node.atime = times.atime;\n    update = true;\n  }\n  if(times.mtime) {\n    node.mtime = times.mtime;\n    update = true;\n  }\n\n  function complete(error) {\n    // Queue this change so we can send watch events.\n    // Unlike node.js, we send the full path vs. basename/dirname only.\n    context.changes.push({ event: 'change', path: path });\n    callback(error);\n  }\n\n  if(update) {\n    context.putObject(node.id, node, complete);\n  } else {\n    complete();\n  }\n}\n\n/**\n * make_node()\n */\n// in: file or directory path\n// out: new node representing file/directory\nfunction make_node(context, path, type, callback) {\n  if(type !== NODE_TYPE_DIRECTORY && type !== NODE_TYPE_FILE) {\n    return callback(new Errors.EINVAL('type must be a directory or file', path));\n  }\n\n  path = normalize(path);\n\n  var name = basename(path);\n  var parentPath = dirname(path);\n  var parentNode;\n  var parentNodeData;\n  var node;\n\n  // Check if the parent node exists\n  function create_node_in_parent(error, parentDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(parentDirectoryNode.type !== NODE_TYPE_DIRECTORY) {\n      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));\n    } else {\n      parentNode = parentDirectoryNode;\n      find_node(context, path, check_if_node_exists);\n    }\n  }\n\n  // Check if the node to be created already exists\n  function check_if_node_exists(error, result) {\n    if(!error && result) {\n      callback(new Errors.EEXIST('path name already exists', path));\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      context.getObject(parentNode.data, create_node);\n    }\n  }\n\n  // Create the new node\n  function create_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentNodeData = result;\n      Node.create({\n        guid: context.guid,\n        type: type\n      }, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        node = result;\n        node.nlinks += 1;\n        context.putObject(node.id, node, update_parent_node_data);\n      });\n    }\n  }\n\n  // Update parent node time\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, node, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  // Update the parent nodes data\n  function update_parent_node_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      parentNodeData[name] = new DirectoryEntry(node.id, type);\n      context.putObject(parentNode.data, parentNodeData, update_time);\n    }\n  }\n\n  // Find the parent node\n  find_node(context, parentPath, create_node_in_parent);\n}\n\n/**\n * find_node\n */\n// in: file or directory path\n// out: node structure, or error\nfunction find_node(context, path, callback) {\n  path = normalize(path);\n  if(!path) {\n    return callback(new Errors.ENOENT('path is an empty string'));\n  }\n  var name = basename(path);\n  var parentPath = dirname(path);\n  var followedCount = 0;\n\n  function read_root_directory_node(error, superNode) {\n    if(error) {\n      callback(error);\n    } else if(!superNode || superNode.type !== NODE_TYPE_META || !superNode.rnode) {\n      callback(new Errors.EFILESYSTEMERROR());\n    } else {\n      context.getObject(superNode.rnode, check_root_directory_node);\n    }\n  }\n\n  function check_root_directory_node(error, rootDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(!rootDirectoryNode) {\n      callback(new Errors.ENOENT());\n    } else {\n      callback(null, rootDirectoryNode);\n    }\n  }\n\n  // in: parent directory node\n  // out: parent directory data\n  function read_parent_directory_data(error, parentDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(parentDirectoryNode.type !== NODE_TYPE_DIRECTORY || !parentDirectoryNode.data) {\n      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));\n    } else {\n      context.getObject(parentDirectoryNode.data, get_node_from_parent_directory_data);\n    }\n  }\n\n  // in: parent directory data\n  // out: searched node\n  function get_node_from_parent_directory_data(error, parentDirectoryData) {\n    if(error) {\n      callback(error);\n    } else {\n      if(!_(parentDirectoryData).has(name)) {\n        callback(new Errors.ENOENT(null, path));\n      } else {\n        var nodeId = parentDirectoryData[name].id;\n        context.getObject(nodeId, is_symbolic_link);\n      }\n    }\n  }\n\n  function is_symbolic_link(error, node) {\n    if(error) {\n      callback(error);\n    } else {\n      if(node.type === NODE_TYPE_SYMBOLIC_LINK) {\n        followedCount++;\n        if(followedCount > SYMLOOP_MAX){\n          callback(new Errors.ELOOP(null, path));\n        } else {\n          follow_symbolic_link(node.data);\n        }\n      } else {\n        callback(null, node);\n      }\n    }\n  }\n\n  function follow_symbolic_link(data) {\n    data = normalize(data);\n    parentPath = dirname(data);\n    name = basename(data);\n    if(ROOT_DIRECTORY_NAME === name) {\n      context.getObject(SUPER_NODE_ID, read_root_directory_node);\n    } else {\n      find_node(context, parentPath, read_parent_directory_data);\n    }\n  }\n\n  if(ROOT_DIRECTORY_NAME === name) {\n    context.getObject(SUPER_NODE_ID, read_root_directory_node);\n  } else {\n    find_node(context, parentPath, read_parent_directory_data);\n  }\n}\n\n\n/**\n * set extended attribute (refactor)\n */\nfunction set_extended_attribute (context, path, node, name, value, flag, callback) {\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      update_node_times(context, path, node, { ctime: Date.now() }, callback);\n    }\n  }\n\n  var xattrs = node.xattrs;\n\n  if (flag === XATTR_CREATE && xattrs.hasOwnProperty(name)) {\n    callback(new Errors.EEXIST('attribute already exists', path));\n  }\n  else if (flag === XATTR_REPLACE && !xattrs.hasOwnProperty(name)) {\n    callback(new Errors.ENOATTR(null, path));\n  }\n  else {\n    xattrs[name] = value;\n    context.putObject(node.id, node, update_time);\n  }\n}\n\n/**\n * ensure_root_directory. Creates a root node if necessary.\n *\n * Note: this should only be invoked when formatting a new file system.\n * Multiple invocations of this by separate instances will still result\n * in only a single super node.\n */\nfunction ensure_root_directory(context, callback) {\n  var superNode;\n  var directoryNode;\n  var directoryData;\n\n  function ensure_super_node(error, existingNode) {\n    if(!error && existingNode) {\n      // Another instance has beat us and already created the super node.\n      callback();\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      SuperNode.create({guid: context.guid}, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        superNode = result;\n        context.putObject(superNode.id, superNode, write_directory_node);\n      });\n    }\n  }\n\n  function write_directory_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      Node.create({\n        guid: context.guid,\n        id: superNode.rnode,\n        type: NODE_TYPE_DIRECTORY\n      }, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        directoryNode = result;\n        directoryNode.nlinks += 1;\n        context.putObject(directoryNode.id, directoryNode, write_directory_data);\n      });\n    }\n  }\n\n  function write_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = {};\n      context.putObject(directoryNode.data, directoryData, callback);\n    }\n  }\n\n  context.getObject(SUPER_NODE_ID, ensure_super_node);\n}\n\n/**\n * make_directory\n */\nfunction make_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var parentDirectoryNode;\n  var parentDirectoryData;\n\n  function check_if_directory_exists(error, result) {\n    if(!error && result) {\n      callback(new Errors.EEXIST(null, path));\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      find_node(context, parentPath, read_parent_directory_data);\n    }\n  }\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryNode = result;\n      context.getObject(parentDirectoryNode.data, write_directory_node);\n    }\n  }\n\n  function write_directory_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryData = result;\n      Node.create({\n        guid: context.guid,\n        type: NODE_TYPE_DIRECTORY\n      }, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        directoryNode = result;\n        directoryNode.nlinks += 1;\n        context.putObject(directoryNode.id, directoryNode, write_directory_data);\n      });\n    }\n  }\n\n  function write_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = {};\n      context.putObject(directoryNode.data, directoryData, update_parent_directory_data);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryData[name] = new DirectoryEntry(directoryNode.id, NODE_TYPE_DIRECTORY);\n      context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);\n    }\n  }\n\n  find_node(context, path, check_if_directory_exists);\n}\n\n/**\n * remove_directory\n */\nfunction remove_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var parentDirectoryNode;\n  var parentDirectoryData;\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryNode = result;\n      context.getObject(parentDirectoryNode.data, check_if_node_exists);\n    }\n  }\n\n  function check_if_node_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else if(ROOT_DIRECTORY_NAME === name) {\n      callback(new Errors.EBUSY(null, path));\n    } else if(!_(result).has(name)) {\n      callback(new Errors.ENOENT(null, path));\n    } else {\n      parentDirectoryData = result;\n      directoryNode = parentDirectoryData[name].id;\n      context.getObject(directoryNode, check_if_node_is_directory);\n    }\n  }\n\n  function check_if_node_is_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.type !== NODE_TYPE_DIRECTORY) {\n      callback(new Errors.ENOTDIR(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_directory_is_empty);\n    }\n  }\n\n  function check_if_directory_is_empty(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).size() > 0) {\n        callback(new Errors.ENOTEMPTY(null, path));\n      } else {\n        remove_directory_entry_from_parent_directory_node();\n      }\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, remove_directory_node);\n    }\n  }\n\n  function remove_directory_entry_from_parent_directory_node() {\n    delete parentDirectoryData[name];\n    context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);\n  }\n\n  function remove_directory_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(directoryNode.id, remove_directory_data);\n    }\n  }\n\n  function remove_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(directoryNode.data, callback);\n    }\n  }\n\n  find_node(context, parentPath, read_parent_directory_data);\n}\n\nfunction open_file(context, path, flags, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var directoryEntry;\n  var fileNode;\n  var fileData;\n\n  var followedCount = 0;\n\n  if(ROOT_DIRECTORY_NAME === name) {\n    if(_(flags).contains(O_WRITE)) {\n      callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n    } else {\n      find_node(context, path, set_file_node);\n    }\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.type !== NODE_TYPE_DIRECTORY) {\n      callback(new Errors.ENOENT(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).has(name)) {\n        if(_(flags).contains(O_EXCLUSIVE)) {\n          callback(new Errors.ENOENT('O_CREATE and O_EXCLUSIVE are set, and the named file exists', path));\n        } else {\n          directoryEntry = directoryData[name];\n          if(directoryEntry.type === NODE_TYPE_DIRECTORY && _(flags).contains(O_WRITE)) {\n            callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n          } else {\n            context.getObject(directoryEntry.id, check_if_symbolic_link);\n          }\n        }\n      } else {\n        if(!_(flags).contains(O_CREATE)) {\n          callback(new Errors.ENOENT('O_CREATE is not set and the named file does not exist', path));\n        } else {\n          write_file_node();\n        }\n      }\n    }\n  }\n\n  function check_if_symbolic_link(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var node = result;\n      if(node.type === NODE_TYPE_SYMBOLIC_LINK) {\n        followedCount++;\n        if(followedCount > SYMLOOP_MAX){\n          callback(new Errors.ELOOP(null, path));\n        } else {\n          follow_symbolic_link(node.data);\n        }\n      } else {\n        set_file_node(undefined, node);\n      }\n    }\n  }\n\n  function follow_symbolic_link(data) {\n    data = normalize(data);\n    parentPath = dirname(data);\n    name = basename(data);\n    if(ROOT_DIRECTORY_NAME === name) {\n      if(_(flags).contains(O_WRITE)) {\n        callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n      } else {\n        find_node(context, path, set_file_node);\n      }\n    }\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function set_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      callback(null, fileNode);\n    }\n  }\n\n  function write_file_node() {\n    Node.create({\n      guid: context.guid,\n      type: NODE_TYPE_FILE\n    }, function(error, result) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      fileNode = result;\n      fileNode.nlinks += 1;\n      context.putObject(fileNode.id, fileNode, write_file_data);\n    });\n  }\n\n  function write_file_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = new Buffer(0);\n      fileData.fill(0);\n      context.putBuffer(fileNode.data, fileData, update_directory_data);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, handle_update_result);\n    }\n  }\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_FILE);\n      context.putObject(directoryNode.data, directoryData, update_time);\n    }\n  }\n\n  function handle_update_result(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, fileNode);\n    }\n  }\n}\n\nfunction replace_data(context, ofd, buffer, offset, length, callback) {\n  var fileNode;\n\n  function return_nbytes(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, length);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);\n    }\n  }\n\n  function update_file_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function write_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      var newData = new Buffer(length);\n      newData.fill(0);\n      buffer.copy(newData, 0, offset, offset + length);\n      ofd.position = length;\n\n      fileNode.size = length;\n      fileNode.version += 1;\n\n      context.putBuffer(fileNode.data, newData, update_file_node);\n    }\n  }\n\n  context.getObject(ofd.id, write_file_data);\n}\n\nfunction write_data(context, ofd, buffer, offset, length, position, callback) {\n  var fileNode;\n  var fileData;\n\n  function return_nbytes(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, length);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);\n    }\n  }\n\n  function update_file_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function update_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = result;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var _position = (!(undefined === position || null === position)) ? position : ofd.position;\n      var newSize = Math.max(fileData.length, _position + length);\n      var newData = new Buffer(newSize);\n      newData.fill(0);\n      if(fileData) {\n        fileData.copy(newData);\n      }\n      buffer.copy(newData, _position, offset, offset + length);\n      if(undefined === position) {\n        ofd.position += length;\n      }\n\n      fileNode.size = newSize;\n      fileNode.version += 1;\n\n      context.putBuffer(fileNode.data, newData, update_file_node);\n    }\n  }\n\n  function read_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      context.getBuffer(fileNode.data, update_file_data);\n    }\n  }\n\n  context.getObject(ofd.id, read_file_data);\n}\n\nfunction read_data(context, ofd, buffer, offset, length, position, callback) {\n  var fileNode;\n  var fileData;\n\n  function handle_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = result;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var _position = (!(undefined === position || null === position)) ? position : ofd.position;\n      length = (_position + length > buffer.length) ? length - _position : length;\n      fileData.copy(buffer, offset, _position, _position + length);\n      if(undefined === position) {\n        ofd.position += length;\n      }\n      callback(null, length);\n    }\n  }\n\n  function read_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.type === NODE_TYPE_DIRECTORY) {\n      callback(new Errors.EISDIR('the named file is a directory', ofd.path));\n    } else {\n      fileNode = result;\n      context.getBuffer(fileNode.data, handle_file_data);\n    }\n  }\n\n  context.getObject(ofd.id, read_file_data);\n}\n\nfunction stat_file(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  find_node(context, path, callback);\n}\n\nfunction fstat_file(context, ofd, callback) {\n  ofd.getNode(context, callback);\n}\n\nfunction lstat_file(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n\n  if(ROOT_DIRECTORY_NAME === name) {\n    find_node(context, path, callback);\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', path));\n      } else {\n        context.getObject(directoryData[name].id, callback);\n      }\n    }\n  }\n}\n\nfunction link_node(context, oldpath, newpath, callback) {\n  oldpath = normalize(oldpath);\n  var oldname = basename(oldpath);\n  var oldParentPath = dirname(oldpath);\n\n  newpath = normalize(newpath);\n  var newname = basename(newpath);\n  var newParentPath = dirname(newpath);\n  var ctime = Date.now();\n\n  var oldDirectoryNode;\n  var oldDirectoryData;\n  var newDirectoryNode;\n  var newDirectoryData;\n  var fileNodeID;\n  var fileNode;\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);\n    }\n  }\n\n  function update_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      fileNode.nlinks += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function read_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      context.getObject(fileNodeID, update_file_node);\n    }\n  }\n\n  function check_if_new_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newDirectoryData = result;\n      if(_(newDirectoryData).has(newname)) {\n        callback(new Errors.EEXIST('newpath resolves to an existing file', newname));\n      } else {\n        newDirectoryData[newname] = oldDirectoryData[oldname];\n        fileNodeID = newDirectoryData[newname].id;\n        context.putObject(newDirectoryNode.data, newDirectoryData, read_file_node);\n      }\n    }\n  }\n\n  function read_new_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newDirectoryNode = result;\n      context.getObject(newDirectoryNode.data, check_if_new_file_exists);\n    }\n  }\n\n  function check_if_old_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldDirectoryData = result;\n      if(!_(oldDirectoryData).has(oldname)) {\n        callback(new Errors.ENOENT('a component of either path prefix does not exist', oldname));\n      } else if(oldDirectoryData[oldname].type === NODE_TYPE_DIRECTORY) {\n        callback(new Errors.EPERM('oldpath refers to a directory'));\n      } else {\n        find_node(context, newParentPath, read_new_directory_data);\n      }\n    }\n  }\n\n  function read_old_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldDirectoryNode = result;\n      context.getObject(oldDirectoryNode.data, check_if_old_file_exists);\n    }\n  }\n\n  find_node(context, oldParentPath, read_old_directory_data);\n}\n\nfunction unlink_node(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var fileNode;\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      delete directoryData[name];\n      context.putObject(directoryNode.data, directoryData, function(error) {\n        var now = Date.now();\n        update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);\n      });\n    }\n  }\n\n  function delete_file_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(fileNode.data, update_directory_data);\n    }\n  }\n\n  function update_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      fileNode.nlinks -= 1;\n      if(fileNode.nlinks < 1) {\n        context.delete(fileNode.id, delete_file_data);\n      } else {\n        context.putObject(fileNode.id, fileNode, function(error) {\n          update_node_times(context, path, fileNode, { ctime: Date.now() }, update_directory_data);\n        });\n      }\n    }\n  }\n\n  function check_if_node_is_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.type === NODE_TYPE_DIRECTORY) {\n      callback(new Errors.EPERM('unlink not permitted on directories', name));\n    } else {\n      update_file_node(null, result);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));\n      } else {\n        context.getObject(directoryData[name].id, check_if_node_is_directory);\n      }\n    }\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  find_node(context, parentPath, read_directory_data);\n}\n\nfunction read_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n\n  var directoryNode;\n  var directoryData;\n\n  function handle_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      var files = Object.keys(directoryData);\n      callback(null, files);\n    }\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.type !== NODE_TYPE_DIRECTORY) {\n      callback(new Errors.ENOTDIR(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, handle_directory_data);\n    }\n  }\n\n  find_node(context, path, read_directory_data);\n}\n\nfunction make_symbolic_link(context, srcpath, dstpath, callback) {\n  dstpath = normalize(dstpath);\n  var name = basename(dstpath);\n  var parentPath = dirname(dstpath);\n\n  var directoryNode;\n  var directoryData;\n  var fileNode;\n\n  if(ROOT_DIRECTORY_NAME === name) {\n    callback(new Errors.EEXIST(null, name));\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).has(name)) {\n        callback(new Errors.EEXIST(null, name));\n      } else {\n        write_file_node();\n      }\n    }\n  }\n\n  function write_file_node() {\n    Node.create({\n      guid: context.guid,\n      type: NODE_TYPE_SYMBOLIC_LINK\n    }, function(error, result) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      fileNode = result;\n      fileNode.nlinks += 1;\n\n      // If the srcpath isn't absolute, resolve it relative to the dstpath\n      // but store both versions, since we'll use the relative one in readlink().\n      if(!isAbsolutePath(srcpath)) {\n        fileNode.symlink_relpath = srcpath;\n        srcpath = Path.resolve(parentPath, srcpath); \n      }\n\n      fileNode.size = srcpath.length;\n      fileNode.data = srcpath;\n      \n      context.putObject(fileNode.id, fileNode, update_directory_data);\n    });\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_SYMBOLIC_LINK);\n      context.putObject(directoryNode.data, directoryData, update_time);\n    }\n  }\n}\n\nfunction read_link(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n\n  find_node(context, parentPath, read_directory_data);\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));\n      } else {\n        context.getObject(directoryData[name].id, check_if_symbolic);\n      }\n    }\n  }\n\n  function check_if_symbolic(error, fileNode) {\n    if(error) {\n      callback(error);\n    } else {\n      if(fileNode.type !== NODE_TYPE_SYMBOLIC_LINK) {\n        callback(new Errors.EINVAL('path not a symbolic link', path));\n      } else {\n        // If we were originally given a relative path, return that now vs. the\n        // absolute path we've generated and use elsewhere internally.\n        var target = fileNode.symlink_relpath ? fileNode.symlink_relpath : fileNode.data;\n        callback(null, target);\n      }\n    }\n  }\n}\n\nfunction truncate_file(context, path, length, callback) {\n  path = normalize(path);\n\n  var fileNode;\n\n  function read_file_data (error, node) {\n    if (error) {\n      callback(error);\n    } else if(node.type === NODE_TYPE_DIRECTORY ) {\n      callback(new Errors.EISDIR(null, path));\n    } else{\n      fileNode = node;\n      context.getBuffer(fileNode.data, truncate_file_data);\n    }\n  }\n\n  function truncate_file_data(error, fileData) {\n    if (error) {\n      callback(error);\n    } else {\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var data = new Buffer(length);\n      data.fill(0);\n      if(fileData) {\n        fileData.copy(data);\n      }\n      context.putBuffer(fileNode.data, data, update_file_node);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, path, fileNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_file_node (error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode.size = length;\n      fileNode.version += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  if(length < 0) {\n    callback(new Errors.EINVAL('length cannot be negative'));\n  } else {\n    find_node(context, path, read_file_data);\n  }\n}\n\nfunction ftruncate_file(context, ofd, length, callback) {\n  var fileNode;\n\n  function read_file_data (error, node) {\n    if (error) {\n      callback(error);\n    } else if(node.type === NODE_TYPE_DIRECTORY ) {\n      callback(new Errors.EISDIR());\n    } else{\n      fileNode = node;\n      context.getBuffer(fileNode.data, truncate_file_data);\n    }\n  }\n\n  function truncate_file_data(error, fileData) {\n    if (error) {\n      callback(error);\n    } else {\n      var data;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      if(fileData) {\n        data = fileData.slice(0, length);\n      } else {\n        data = new Buffer(length);\n        data.fill(0);\n      }\n      context.putBuffer(fileNode.data, data, update_file_node);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_file_node (error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode.size = length;\n      fileNode.version += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  if(length < 0) {\n    callback(new Errors.EINVAL('length cannot be negative'));\n  } else {\n    ofd.getNode(context, read_file_data);\n  }\n}\n\nfunction utimes_file(context, path, atime, mtime, callback) {\n  path = normalize(path);\n\n  function update_times(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      update_node_times(context, path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);\n    }\n  }\n\n  if (typeof atime !== 'number' || typeof mtime !== 'number') {\n    callback(new Errors.EINVAL('atime and mtime must be number', path));\n  }\n  else if (atime < 0 || mtime < 0) {\n    callback(new Errors.EINVAL('atime and mtime must be positive integers', path));\n  }\n  else {\n    find_node(context, path, update_times);\n  }\n}\n\nfunction futimes_file(context, ofd, atime, mtime, callback) {\n\n  function update_times (error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      update_node_times(context, ofd.path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);\n    }\n  }\n\n  if (typeof atime !== 'number' || typeof mtime !== 'number') {\n    callback(new Errors.EINVAL('atime and mtime must be a number'));\n  }\n  else if (atime < 0 || mtime < 0) {\n    callback(new Errors.EINVAL('atime and mtime must be positive integers'));\n  }\n  else {\n    ofd.getNode(context, update_times);\n  }\n}\n\nfunction setxattr_file(context, path, name, value, flag, callback) {\n  path = normalize(path);\n\n  function setxattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n    set_extended_attribute(context, path, node, name, value, flag, callback);\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else if (flag !== null &&\n           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {\n    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE', path));\n  }\n  else {\n    find_node(context, path, setxattr);\n  }\n}\n\nfunction fsetxattr_file (context, ofd, name, value, flag, callback) {\n  function setxattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n    set_extended_attribute(context, ofd.path, node, name, value, flag, callback);\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string'));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else if (flag !== null &&\n           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {\n    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE'));\n  }\n  else {\n    ofd.getNode(context, setxattr);\n  }\n}\n\nfunction getxattr_file (context, path, name, callback) {\n  path = normalize(path);\n\n  function get_xattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR(null, path));\n    }\n    else {\n      callback(null, xattrs[name]);\n    }\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else {\n    find_node(context, path, get_xattr);\n  }\n}\n\nfunction fgetxattr_file (context, ofd, name, callback) {\n\n  function get_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR());\n    }\n    else {\n      callback(null, xattrs[name]);\n    }\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL());\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else {\n    ofd.getNode(context, get_xattr);\n  }\n}\n\nfunction removexattr_file (context, path, name, callback) {\n  path = normalize(path);\n\n  function remove_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    function update_time(error) {\n      if(error) {\n        callback(error);\n      } else {\n        update_node_times(context, path, node, { ctime: Date.now() }, callback);\n      }\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR(null, path));\n    }\n    else {\n      delete xattrs[name];\n      context.putObject(node.id, node, update_time);\n    }\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else {\n    find_node(context, path, remove_xattr);\n  }\n}\n\nfunction fremovexattr_file (context, ofd, name, callback) {\n\n  function remove_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    function update_time(error) {\n      if(error) {\n        callback(error);\n      } else {\n        update_node_times(context, ofd.path, node, { ctime: Date.now() }, callback);\n      }\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR());\n    }\n    else {\n      delete xattrs[name];\n      context.putObject(node.id, node, update_time);\n    }\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string'));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else {\n    ofd.getNode(context, remove_xattr);\n  }\n}\n\nfunction validate_flags(flags) {\n  if(!_(O_FLAGS).has(flags)) {\n    return null;\n  }\n  return O_FLAGS[flags];\n}\n\nfunction validate_file_options(options, enc, fileMode){\n  if(!options) {\n    options = { encoding: enc, flag: fileMode };\n  } else if(typeof options === \"function\") {\n    options = { encoding: enc, flag: fileMode };\n  } else if(typeof options === \"string\") {\n    options = { encoding: options, flag: fileMode };\n  }\n  return options;\n}\n\nfunction pathCheck(path, allowRelative, callback) {\n  var err;\n\n  if(typeof allowRelative === 'function') {\n    callback = allowRelative;\n    allowRelative = false;\n  }\n\n  if(!path) {\n    err = new Errors.EINVAL('Path must be a string', path);\n  } else if(isNullPath(path)) {\n    err = new Errors.EINVAL('Path must be a string without null bytes.', path);\n  } else if(!allowRelative && !isAbsolutePath(path)) {\n    err = new Errors.EINVAL('Path must be absolute.', path);\n  }\n\n  if(err) {\n    callback(err);\n    return false;\n  }\n  return true;\n}\n\n\nfunction open(fs, context, path, flags, mode, callback) {\n  /**\n   * NOTE: we support the same signature as node with a `mode` arg,\n   * but ignore it. We need to add it.  Here is what node.js does:\n   * function open(path, flags, mode, callback) {\n   *    path = getPathFromURL(path);\n   *  validatePath(path);\n   *  const flagsNumber = stringToFlags(flags);\n   *  if (arguments.length < 4) {\n   *    callback = makeCallback(mode);\n   *    mode = 0o666;\n   *  } else {\n   *    mode = validateAndMaskMode(mode, 'mode', 0o666);\n   *    callback = makeCallback(callback);\n   * }\n  */\n\n  callback = arguments[arguments.length - 1];\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, fileNode) {\n    if(error) {\n      callback(error);\n    } else {\n      var position;\n      if(_(flags).contains(O_APPEND)) {\n        position = fileNode.size;\n      } else {\n        position = 0;\n      }\n      var openFileDescription = new OpenFileDescription(path, fileNode.id, flags, position);\n      var fd = fs.allocDescriptor(openFileDescription);\n      callback(null, fd);\n    }\n  }\n\n  flags = validate_flags(flags);\n  if(!flags) {\n    callback(new Errors.EINVAL('flags is not valid'), path);\n  }\n\n  open_file(context, path, flags, check_result);\n}\n\nfunction close(fs, context, fd, callback) {\n  if(!_(fs.openFiles).has(fd)) {\n    callback(new Errors.EBADF());\n  } else {\n    fs.releaseDescriptor(fd);\n    callback(null);\n  }\n}\n\nfunction mknod(fs, context, path, type, callback) {\n  if(!pathCheck(path, callback)) return;\n  make_node(context, path, type, callback);\n}\n\nfunction mkdir(fs, context, path, mode, callback) {\n  if (arguments.length < 5) {\n    callback = mode;\n    mode = FULL_READ_WRITE_EXEC_PERMISSIONS;\n  } else {\n    mode = validateAndMaskMode(mode, FULL_READ_WRITE_EXEC_PERMISSIONS, callback);\n    if(!mode) return;\n  }\n \n  if(!pathCheck(path, callback)) return;\n  make_directory(context, path, callback);\n}\n\nfunction rmdir(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  remove_directory(context, path, callback);\n}\n\nfunction stat(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(path, result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  stat_file(context, path, check_result);\n}\n\nfunction fstat(fs, context, fd, callback) {\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(ofd.path, result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else {\n    fstat_file(context, ofd, check_result);\n  }\n}\n\nfunction link(fs, context, oldpath, newpath, callback) {\n  if(!pathCheck(oldpath, callback)) return;\n  if(!pathCheck(newpath, callback)) return;\n  link_node(context, oldpath, newpath, callback);\n}\n\nfunction unlink(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  unlink_node(context, path, callback);\n}\n\nfunction read(fs, context, fd, buffer, offset, length, position, callback) {\n  // Follow how node.js does this\n  function wrapped_cb(err, bytesRead) {\n    // Retain a reference to buffer so that it can't be GC'ed too soon.\n    callback(err, bytesRead || 0, buffer);\n  }\n\n  offset = (undefined === offset) ? 0 : offset;\n  length = (undefined === length) ? buffer.length - offset : length;\n  callback = arguments[arguments.length - 1];\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_READ)) {\n    callback(new Errors.EBADF('descriptor does not permit reading'));\n  } else {\n    read_data(context, ofd, buffer, offset, length, position, wrapped_cb);\n  }\n}\n\nfunction readFile(fs, context, path, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, null, 'r');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'r');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);\n    var fd = fs.allocDescriptor(ofd);\n\n    function cleanup() {\n      fs.releaseDescriptor(fd);\n    }\n\n    fstat_file(context, ofd, function(err, fstatResult) {\n      if(err) {\n        cleanup();\n        return callback(err);\n      }\n\n      var stats = new Stats(ofd.path, fstatResult, fs.name);\n\n      if(stats.isDirectory()) {\n        cleanup();\n        return callback(new Errors.EISDIR('illegal operation on directory', path));\n      }\n\n      var size = stats.size;\n      var buffer = new Buffer(size);\n      buffer.fill(0);\n\n      read_data(context, ofd, buffer, 0, size, 0, function(err, nbytes) {\n        cleanup();\n\n        if(err) {\n          return callback(err);\n        }\n\n        var data;\n        if(options.encoding === 'utf8') {\n          data = Encoding.decode(buffer);\n        } else {\n          data = buffer;\n        }\n        callback(null, data);\n      });\n    });\n  });\n}\n\nfunction write(fs, context, fd, buffer, offset, length, position, callback) {\n  callback = arguments[arguments.length - 1];\n  offset = (undefined === offset) ? 0 : offset;\n  length = (undefined === length) ? buffer.length - offset : length;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else if(buffer.length - offset < length) {\n    callback(new Errors.EIO('intput buffer is too small'));\n  } else {\n    write_data(context, ofd, buffer, offset, length, position, callback);\n  }\n}\n\nfunction writeFile(fs, context, path, data, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, 'utf8', 'w');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'w');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  data = data || '';\n  if(typeof data === \"number\") {\n    data = '' + data;\n  }\n  if(typeof data === \"string\" && options.encoding === 'utf8') {\n    data = Encoding.encode(data);\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);\n    var fd = fs.allocDescriptor(ofd);\n\n    replace_data(context, ofd, data, 0, data.length, function(err, nbytes) {\n      fs.releaseDescriptor(fd);\n\n      if(err) {\n        return callback(err);\n      }\n      callback(null);\n    });\n  });\n}\n\nfunction appendFile(fs, context, path, data, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, 'utf8', 'a');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'a');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  data = data || '';\n  if(typeof data === \"number\") {\n    data = '' + data;\n  }\n  if(typeof data === \"string\" && options.encoding === 'utf8') {\n    data = Encoding.encode(data);\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, fileNode.size);\n    var fd = fs.allocDescriptor(ofd);\n\n    write_data(context, ofd, data, 0, data.length, ofd.position, function(err, nbytes) {\n      fs.releaseDescriptor(fd);\n\n      if(err) {\n        return callback(err);\n      }\n      callback(null);\n    });\n  });\n}\n\nfunction exists(fs, context, path, callback) {\n  function cb(err, stats) {\n    callback(err ? false : true);\n  }\n  stat(fs, context, path, cb);\n}\n\n// Based on https://github.com/nodejs/node/blob/c700cc42da9cf73af9fec2098520a6c0a631d901/lib/internal/validators.js#L21\nvar octalReg = /^[0-7]+$/;\nvar modeDesc = 'must be a 32-bit unsigned integer or an octal string';\nfunction isUint32(value) {\n  return value === (value >>> 0);\n}\n// Validator for mode_t (the S_* constants). Valid numbers or octal strings\n// will be masked with 0o777 to be consistent with the behavior in POSIX APIs.\nfunction validateAndMaskMode(value, def, callback) {\n  if(typeof def === 'function') {\n    callback = def;\n    def = undefined;\n  }\n\n  if (isUint32(value)) {\n    return value & FULL_READ_WRITE_EXEC_PERMISSIONS;\n  }\n\n  if (typeof value === 'number') {\n    if (!Number.isInteger(value)) {\n      callback(new Errors.EINVAL('mode not a valid an integer value', value));\n      return false;\n    } else {\n      // 2 ** 32 === 4294967296\n      callback(new Errors.EINVAL('mode not a valid an integer value', value));\n      return false;\n    }\n  }\n\n  if (typeof value === 'string') {\n    if (!octalReg.test(value)) {\n      callback(new Errors.EINVAL('mode not a valid octal string', value));\n      return false;\n    }\n    var parsed = parseInt(value, 8);\n    return parsed & FULL_READ_WRITE_EXEC_PERMISSIONS;\n  }\n\n  // TODO(BridgeAR): Only return `def` in case `value === null`\n  if (def !== undefined) {\n    return def;\n  }\n\n  callback(new Errors.EINVAL('mode not valid', value));\n  return false;\n}\n\nfunction chmod_file(context, path, mode, callback) {\n  path = normalize(path);\n\n  function update_mode(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      Node.setMode(mode, node);\n      update_node_times(context, path, node, { mtime: Date.now() }, callback);\n    }\n  }\n\n  if (typeof mode !== 'number') {\n    callback(new Errors.EINVAL('mode must be number', path));\n  }\n  else {\n    find_node(context, path, update_mode);\n  }\n}\n\nfunction fchmod_file(context, ofd, mode, callback) {\n  function update_mode(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      node.mode = mode;\n      update_node_times(context, ofd.path, node, { mtime: Date.now() }, callback);\n    }\n  }\n\n  if (typeof mode !== 'number') {\n    callback(new Errors.EINVAL('mode must be a number'));\n  }\n  else {\n    ofd.getNode(context, update_mode);\n  }\n}\n\nfunction chown_file(context, path, uid, gid, callback) {\n  path = normalize(path);\n\n  function update_owner(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      node.uid = uid;\n      node.gid = gid;\n      update_node_times(context, path, node, { mtime: Date.now() }, callback);\n    }\n  }\n\n  find_node(context, path, update_owner);\n}\n\nfunction fchown_file(context, ofd, uid, gid, callback) {\n  function update_owner(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      node.uid = uid;\n      node.gid = gid;\n      update_node_times(context, ofd.path, node, { mtime: Date.now() }, callback);\n    }\n  }\n\n  ofd.getNode(context, update_owner);\n}\n\nfunction getxattr(fs, context, path, name, callback) {\n  if (!pathCheck(path, callback)) return;\n  getxattr_file(context, path, name, callback);\n}\n\nfunction fgetxattr(fs, context, fd, name, callback) {\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else {\n    fgetxattr_file(context, ofd, name, callback);\n  }\n}\n\nfunction setxattr(fs, context, path, name, value, flag, callback) {\n  if(typeof flag === 'function') {\n    callback = flag;\n    flag = null;\n  }\n\n  if (!pathCheck(path, callback)) return;\n  setxattr_file(context, path, name, value, flag, callback);\n}\n\nfunction fsetxattr(fs, context, fd, name, value, flag, callback) {\n  if(typeof flag === 'function') {\n    callback = flag;\n    flag = null;\n  }\n\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else if (!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  }\n  else {\n    fsetxattr_file(context, ofd, name, value, flag, callback);\n  }\n}\n\nfunction removexattr(fs, context, path, name, callback) {\n  if (!pathCheck(path, callback)) return;\n  removexattr_file(context, path, name, callback);\n}\n\nfunction fremovexattr(fs, context, fd, name, callback) {\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else if (!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  }\n  else {\n    fremovexattr_file(context, ofd, name, callback);\n  }\n}\n\nfunction lseek(fs, context, fd, offset, whence, callback) {\n  function update_descriptor_position(error, stats) {\n    if(error) {\n      callback(error);\n    } else {\n      if(stats.size + offset < 0) {\n        callback(new Errors.EINVAL('resulting file offset would be negative'));\n      } else {\n        ofd.position = stats.size + offset;\n        callback(null, ofd.position);\n      }\n    }\n  }\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  }\n\n  if('SET' === whence) {\n    if(offset < 0) {\n      callback(new Errors.EINVAL('resulting file offset would be negative'));\n    } else {\n      ofd.position = offset;\n      callback(null, ofd.position);\n    }\n  } else if('CUR' === whence) {\n    if(ofd.position + offset < 0) {\n      callback(new Errors.EINVAL('resulting file offset would be negative'));\n    } else {\n      ofd.position += offset;\n      callback(null, ofd.position);\n    }\n  } else if('END' === whence) {\n    fstat_file(context, ofd, update_descriptor_position);\n  } else {\n    callback(new Errors.EINVAL('whence argument is not a proper value'));\n  }\n}\n\nfunction readdir(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  read_directory(context, path, callback);\n}\n\nfunction utimes(fs, context, path, atime, mtime, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  var currentTime = Date.now();\n  atime = (atime) ? atime : currentTime;\n  mtime = (mtime) ? mtime : currentTime;\n\n  utimes_file(context, path, atime, mtime, callback);\n}\n\nfunction futimes(fs, context, fd, atime, mtime, callback) {\n  var currentTime = Date.now();\n  atime = (atime) ? atime : currentTime;\n  mtime = (mtime) ? mtime : currentTime;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    futimes_file(context, ofd, atime, mtime, callback);\n  }\n}\n\nfunction chmod(fs, context, path, mode, callback) {\n  if(!pathCheck(path, callback)) return;\n  mode = validateAndMaskMode(mode, 'mode');\n  if(!mode) return;\n\n  chmod_file(context, path, mode, callback);\n}\n\nfunction fchmod(fs, context, fd, mode, callback) {\n  mode = validateAndMaskMode(mode, 'mode');\n  if(!mode) return;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    fchmod_file(context, ofd, mode, callback);\n  }\n}\n\nfunction chown(fs, context, path, uid, gid, callback) {\n  if(!pathCheck(path, callback)) return;\n  if(!isUint32(uid)) {\n    return callback(new Errors.EINVAL('uid must be a valid integer', uid));\n  }\n  if(!isUint32(gid)) {\n    return callback(new Errors.EINVAL('gid must be a valid integer', gid));\n  }\n\n  chown_file(context, path, uid, gid, callback);\n}\n\nfunction fchown(fs, context, fd, uid, gid, callback) {\n  if(!isUint32(uid)) {\n    return callback(new Errors.EINVAL('uid must be a valid integer', uid));\n  }\n  if(!isUint32(gid)) {\n    return callback(new Errors.EINVAL('gid must be a valid integer', gid));\n  }\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    fchown_file(context, ofd, uid, gid, callback);\n  }\n}\n\nfunction rename(fs, context, oldpath, newpath, callback) {\n  if(!pathCheck(oldpath, callback)) return;\n  if(!pathCheck(newpath, callback)) return;\n\n  oldpath = normalize(oldpath);\n  newpath = normalize(newpath);\n\n  var oldParentPath = Path.dirname(oldpath);\n  var newParentPath = Path.dirname(oldpath);\n  var oldName = Path.basename(oldpath);\n  var newName = Path.basename(newpath);\n  var oldParentDirectory, oldParentData;\n  var newParentDirectory, newParentData;\n  var ctime = Date.now();\n  var fileNode;\n\n  function update_times(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);\n    }\n  }\n\n  function read_new_directory(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.getObject(newParentData[newName].id, update_times);\n    }\n  }\n\n  function update_old_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      if(oldParentDirectory.id === newParentDirectory.id) {\n        oldParentData = newParentData;\n      }\n      delete oldParentData[oldName];\n      context.putObject(oldParentDirectory.data, oldParentData, read_new_directory);\n    }\n  }\n\n  function update_new_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentData[newName] = oldParentData[oldName];\n      context.putObject(newParentDirectory.data, newParentData, update_old_parent_directory_data);\n    }\n  }\n\n  function check_if_new_directory_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentData = result;\n      if(_(newParentData).has(newName)) {\n        remove_directory(context, newpath, update_new_parent_directory_data);\n      } else {\n        update_new_parent_directory_data();\n      }\n    }\n  }\n\n  function read_new_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentDirectory = result;\n      context.getObject(newParentDirectory.data, check_if_new_directory_exists);\n    }\n  }\n\n  function get_new_parent_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldParentData = result;\n      find_node(context, newParentPath, read_new_parent_directory_data);\n    }\n  }\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldParentDirectory = result;\n      context.getObject(result.data, get_new_parent_directory);\n    }\n  }\n\n  function unlink_old_file(error) {\n    if(error) {\n      callback(error);\n    } else {\n      unlink_node(context, oldpath, callback);\n    }\n  }\n\n  function check_node_type(error, node) {\n    if(error) {\n      callback(error);\n    } else if(node.type === NODE_TYPE_DIRECTORY) {\n      find_node(context, oldParentPath, read_parent_directory_data);\n    } else {\n      link_node(context, oldpath, newpath, unlink_old_file);\n    }\n  }\n\n  find_node(context, oldpath, check_node_type);\n}\n\nfunction symlink(fs, context, srcpath, dstpath, type, callback) {\n  // NOTE: we support passing the `type` arg, but ignore it.\n  callback = arguments[arguments.length - 1];\n\n  // Special Case: allow srcpath to be relative, which we normally don't permit.\n  // If the srcpath is relative, we assume it's relative to the dirpath of \n  // dstpath.\n  if(!pathCheck(srcpath, true, callback)) return;\n  if(!pathCheck(dstpath, callback)) return;\n\n  make_symbolic_link(context, srcpath, dstpath, callback);\n}\n\nfunction readlink(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  read_link(context, path, callback);\n}\n\nfunction lstat(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(path, result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  lstat_file(context, path, check_result);\n}\n\nfunction truncate(fs, context, path, length, callback) {\n  // NOTE: length is optional\n  callback = arguments[arguments.length - 1];\n  length = length || 0;\n\n  if(!pathCheck(path, callback)) return;\n  truncate_file(context, path, length, callback);\n}\n\nfunction ftruncate(fs, context, fd, length, callback) {\n  // NOTE: length is optional\n  callback = arguments[arguments.length - 1];\n  length = length || 0;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    ftruncate_file(context, ofd, length, callback);\n  }\n}\n\nmodule.exports = {\n  ensureRootDirectory: ensure_root_directory,\n  open: open,\n  chmod: chmod,\n  fchmod: fchmod,\n  chown: chown,\n  fchown: fchown,\n  close: close,\n  mknod: mknod,\n  mkdir: mkdir,\n  rmdir: rmdir,\n  unlink: unlink,\n  stat: stat,\n  fstat: fstat,\n  link: link,\n  read: read,\n  readFile: readFile,\n  write: write,\n  writeFile: writeFile,\n  appendFile: appendFile,\n  exists: exists,\n  getxattr: getxattr,\n  fgetxattr: fgetxattr,\n  setxattr: setxattr,\n  fsetxattr: fsetxattr,\n  removexattr: removexattr,\n  fremovexattr: fremovexattr,\n  lseek: lseek,\n  readdir: readdir,\n  utimes: utimes,\n  futimes: futimes,\n  rename: rename,\n  symlink: symlink,\n  readlink: readlink,\n  lstat: lstat,\n  truncate: truncate,\n  ftruncate: ftruncate\n};\n","var _ = require('../../lib/nodash.js');\n\nvar isNullPath = require('../path.js').isNull;\nvar nop = require('../shared.js').nop;\n\nvar Constants = require('../constants.js');\nvar FILE_SYSTEM_NAME = Constants.FILE_SYSTEM_NAME;\nvar FS_FORMAT = Constants.FS_FORMAT;\nvar FS_READY = Constants.FS_READY;\nvar FS_PENDING = Constants.FS_PENDING;\nvar FS_ERROR = Constants.FS_ERROR;\nvar FS_NODUPEIDCHECK = Constants.FS_NODUPEIDCHECK;\n\nvar providers = require('../providers/index.js');\n\nvar Shell = require('../shell/shell.js');\nvar Intercom = require('../../lib/intercom.js');\nvar FSWatcher = require('../fs-watcher.js');\nvar Errors = require('../errors.js');\nvar defaultGuidFn = require('../shared.js').guid;\n\nvar STDIN = Constants.STDIN;\nvar STDOUT = Constants.STDOUT;\nvar STDERR = Constants.STDERR;\nvar FIRST_DESCRIPTOR = Constants.FIRST_DESCRIPTOR;\n\n// The core fs operations live on impl\nvar impl = require('./implementation.js');\n\n// node.js supports a calling pattern that leaves off a callback.\nfunction maybeCallback(callback) {\n  if(typeof callback === \"function\") {\n    return callback;\n  }\n  return function(err) {\n    if(err) {\n      throw err;\n    }\n  };\n}\n\n// Default callback that logs an error if passed in\nfunction defaultCallback(err) {\n  if(err) {\n    console.error('Filer error: ', err);\n  }\n}\n\n/**\n * FileSystem\n *\n * A FileSystem takes an `options` object, which can specify a number of,\n * options.  All options are optional, and include:\n *\n * name: the name of the file system, defaults to \"local\"\n *\n * flags: one or more flags to use when creating/opening the file system.\n *        For example: \"FORMAT\" will cause the file system to be formatted.\n *        No explicit flags are set by default.\n *\n * provider: an explicit storage provider to use for the file\n *           system's database context provider.  A number of context\n *           providers are included (see /src/providers), and users\n *           can write one of their own and pass it in to be used.\n *           By default an IndexedDB provider is used.\n *\n * guid: a function for generating unique IDs for nodes in the filesystem.\n *       Use this to override the built-in UUID generation. (Used mainly for tests).\n *\n * callback: a callback function to be executed when the file system becomes\n *           ready for use. Depending on the context provider used, this might\n *           be right away, or could take some time. The callback should expect\n *           an `error` argument, which will be null if everything worked.  Also\n *           users should check the file system's `readyState` and `error`\n *           properties to make sure it is usable.\n */\nfunction FileSystem(options, callback) {\n  options = options || {};\n  callback = callback || defaultCallback;\n\n  var flags = options.flags;\n  var guid = options.guid ? options.guid : defaultGuidFn;\n  var provider = options.provider || new providers.Default(options.name || FILE_SYSTEM_NAME);\n  // If we're given a provider, match its name unless we get an explicit name\n  var name = options.name || provider.name;\n  var forceFormatting = _(flags).contains(FS_FORMAT);\n\n  var fs = this;\n  fs.readyState = FS_PENDING;\n  fs.name = name;\n  fs.error = null;\n\n  fs.stdin = STDIN;\n  fs.stdout = STDOUT;\n  fs.stderr = STDERR;\n\n  // Expose Node's fs.constants to users\n  fs.constants = Constants.fsConstants;\n\n  // Expose Shell constructor\n  this.Shell = Shell.bind(undefined, this);\n\n  // Safely expose the list of open files and file\n  // descriptor management functions\n  var openFiles = {};\n  var nextDescriptor = FIRST_DESCRIPTOR;\n  Object.defineProperty(this, \"openFiles\", {\n    get: function() { return openFiles; }\n  });\n  this.allocDescriptor = function(openFileDescription) {\n    var fd = nextDescriptor ++;\n    openFiles[fd] = openFileDescription;\n    return fd;\n  };\n  this.releaseDescriptor = function(fd) {\n    delete openFiles[fd];\n  };\n\n  // Safely expose the operation queue\n  var queue = [];\n  this.queueOrRun = function(operation) {\n    var error;\n\n    if(FS_READY == fs.readyState) {\n      operation.call(fs);\n    } else if(FS_ERROR == fs.readyState) {\n      error = new Errors.EFILESYSTEMERROR('unknown error');\n    } else {\n      queue.push(operation);\n    }\n\n    return error;\n  };\n  function runQueued() {\n    queue.forEach(function(operation) {\n      operation.call(this);\n    }.bind(fs));\n    queue = null;\n  }\n\n  // We support the optional `options` arg from node, but ignore it\n  this.watch = function(filename, options, listener) {\n    if(isNullPath(filename)) {\n      throw new Error('Path must be a string without null bytes.');\n    }\n    if(typeof options === 'function') {\n      listener = options;\n      options = {};\n    }\n    options = options || {};\n    listener = listener || nop;\n\n    var watcher = new FSWatcher();\n    watcher.start(filename, false, options.recursive);\n    watcher.on('change', listener);\n\n    return watcher;\n  };\n\n  // Deal with various approaches to node ID creation\n  function wrappedGuidFn(context) {\n    return function(callback) {\n      // Skip the duplicate ID check if asked to\n      if(_(flags).contains(FS_NODUPEIDCHECK)) {\n        callback(null, guid());\n        return;\n      }\n\n      // Otherwise (default) make sure this id is unused first\n      function guidWithCheck(callback) {\n        var id = guid();\n        context.getObject(id, function(err, value) {\n          if(err) {\n            callback(err);\n            return;\n          }\n\n          // If this id is unused, use it, otherwise find another\n          if(!value) {\n            callback(null, id);\n          } else {\n            guidWithCheck(callback);\n          }\n        });\n      }\n      guidWithCheck(callback);\n    };\n  }\n\n  // Let other instances (in this or other windows) know about\n  // any changes to this fs instance.\n  function broadcastChanges(changes) {\n    if(!changes.length) {\n      return;\n    }\n    var intercom = Intercom.getInstance();\n    changes.forEach(function(change) {\n      intercom.emit(change.event, change.path);\n    });\n  }\n\n  // Open file system storage provider\n  provider.open(function(err) {\n    function complete(error) {\n      function wrappedContext(methodName) {\n        var context = provider[methodName]();\n        context.flags = flags;\n        context.changes = [];\n        context.guid = wrappedGuidFn(context);\n\n        // When the context is finished, let the fs deal with any change events\n        context.close = function() {\n          var changes = context.changes;\n          broadcastChanges(changes);\n          changes.length = 0;\n        };\n\n        return context;\n      }\n\n      // Wrap the provider so we can extend the context with fs flags and\n      // an array of changes (e.g., watch event 'change' and 'rename' events\n      // for paths updated during the lifetime of the context). From this\n      // point forward we won't call open again, so it's safe to drop it.\n      fs.provider = {\n        openReadWriteContext: function() {\n          return wrappedContext('getReadWriteContext');\n        },\n        openReadOnlyContext: function() {\n          return wrappedContext('getReadOnlyContext');\n        }\n      };\n\n      if(error) {\n        fs.readyState = FS_ERROR;\n      } else {\n        fs.readyState = FS_READY;\n      }\n      runQueued();\n      callback(error, fs);\n    }\n\n    if(err) {\n      return complete(err);\n    }\n\n    var context = provider.getReadWriteContext();\n    context.guid = wrappedGuidFn(context);\n\n    // Mount the filesystem, formatting if necessary\n    if(forceFormatting) {\n      // Wipe the storage provider, then write root block\n      context.clear(function(err) {\n        if(err) {\n          return complete(err);\n        }\n        impl.ensureRootDirectory(context, complete);\n      });\n    } else {\n      // Use existing (or create new) root and mount\n      impl.ensureRootDirectory(context, complete);\n    }\n  });\n}\n\n// Expose storage providers on FileSystem constructor\nFileSystem.providers = providers;\n\n/**\n * Public API for FileSystem\n */\n[\n  'open',\n  'chmod',\n  'fchmod',\n  'chown',\n  'fchown',\n  'close',\n  'mknod',\n  'mkdir',\n  'rmdir',\n  'stat',\n  'fstat',\n  'link',\n  'unlink',\n  'read',\n  'readFile',\n  'write',\n  'writeFile',\n  'appendFile',\n  'exists',\n  'lseek',\n  'readdir',\n  'rename',\n  'readlink',\n  'symlink',\n  'lstat',\n  'truncate',\n  'ftruncate',\n  'utimes',\n  'futimes',\n  'setxattr',\n  'getxattr',\n  'fsetxattr',\n  'fgetxattr',\n  'removexattr',\n  'fremovexattr'\n].forEach(function(methodName) {\n  FileSystem.prototype[methodName] = function() {\n    var fs = this;\n    var args = Array.prototype.slice.call(arguments, 0);\n    var lastArgIndex = args.length - 1;\n\n    // We may or may not get a callback, and since node.js supports\n    // fire-and-forget style fs operations, we have to dance a bit here.\n    var missingCallback = typeof args[lastArgIndex] !== 'function';\n    var callback = maybeCallback(args[lastArgIndex]);\n\n    var error = fs.queueOrRun(function() {\n      var context = fs.provider.openReadWriteContext();\n\n      // Fail early if the filesystem is in an error state (e.g.,\n      // provider failed to open.\n      if(FS_ERROR === fs.readyState) {\n        var err = new Errors.EFILESYSTEMERROR('filesystem unavailable, operation canceled');\n        return callback.call(fs, err);\n      }\n\n      // Wrap the callback so we can explicitly close the context\n      function complete() {\n        context.close();\n        callback.apply(fs, arguments);\n      }\n\n      // Either add or replace the callback with our wrapper complete()\n      if(missingCallback) {\n        args.push(complete);\n      } else {\n        args[lastArgIndex] = complete;\n      }\n\n      // Forward this call to the impl's version, using the following\n      // call signature, with complete() as the callback/last-arg now:\n      // fn(fs, context, arg0, arg1, ... , complete);\n      var fnArgs = [fs, context].concat(args);\n      impl[methodName].apply(null, fnArgs);\n    });\n    if(error) {\n      callback(error);\n    }\n  };\n});\n\nmodule.exports = FileSystem;\n","module.exports = {\n  FileSystem: require('./filesystem/interface.js'),\n  Buffer: require('./buffer.js'),\n  Path: require('./path.js'),\n  Errors: require('./errors.js'),\n  Shell: require('./shell/shell.js')\n};\n"]}
\ No newline at end of file
diff --git a/dist/filer.min.js b/dist/filer.min.js
index abf8f91..2859010 100644
--- a/dist/filer.min.js
+++ b/dist/filer.min.js
@@ -1,114 +1,86 @@
-<<<<<<< HEAD
-<<<<<<< HEAD
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-=======
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->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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-//# sourceMappingURL=/filer.min.map
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
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+//# sourceMappingURL=/filer.min.map
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diff --git a/dist/filer.min.map b/dist/filer.min.map
index 0b40dbc..d9a38e2 100644
--- a/dist/filer.min.map
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Cherry-picked bits of underscore.js, lodash.js\n\n/**\n * Lo-Dash 2.4.0 <http://lodash.com/>\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar ArrayProto = Array.prototype;\nvar nativeForEach = ArrayProto.forEach;\nvar nativeIndexOf = ArrayProto.indexOf;\nvar nativeSome = ArrayProto.some;\n\nvar ObjProto = Object.prototype;\nvar hasOwnProperty = ObjProto.hasOwnProperty;\nvar nativeKeys = Object.keys;\n\nvar breaker = {};\n\nfunction has(obj, key) {\n  return hasOwnProperty.call(obj, key);\n}\n\nvar keys = nativeKeys || function(obj) {\n  if (obj !== Object(obj)) throw new TypeError('Invalid object');\n  var keys = [];\n  for (var key in obj) if (has(obj, key)) keys.push(key);\n  return keys;\n};\n\nfunction size(obj) {\n  if (obj == 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Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// Based on https://github.com/joyent/node/blob/41e53e557992a7d552a8e23de035f9463da25c99/lib/path.js\n\n// resolves . and .. elements in a path array with directory names there\n// must be no slashes, empty elements, or device names (c:\\) in the array\n// (so also no leading and trailing slashes - it does not distinguish\n// relative and absolute paths)\nfunction normalizeArray(parts, allowAboveRoot) {\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = parts.length - 1; i >= 0; i--) {\n    var last = parts[i];\n    if (last === '.') {\n      parts.splice(i, 1);\n    } else if (last === '..') {\n      parts.splice(i, 1);\n      up++;\n    } else if (up) {\n      parts.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (allowAboveRoot) {\n    for (; up--; up) {\n      parts.unshift('..');\n    }\n  }\n\n  return parts;\n}\n\n// Split a filename into [root, dir, basename, ext], unix version\n// 'root' is just a slash, or nothing.\nvar splitPathRe =\n      /^(\\/?)([\\s\\S]+\\/(?!$)|\\/)?((?:\\.{1,2}$|[\\s\\S]+?)?(\\.[^.\\/]*)?)$/;\nvar splitPath = function(filename) {\n  var result = splitPathRe.exec(filename);\n  return [result[1] || '', result[2] || '', result[3] || '', result[4] || ''];\n};\n\n// path.resolve([from ...], to)\nfunction resolve() {\n  var resolvedPath = '',\n      resolvedAbsolute = false;\n\n  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {\n    // XXXfiler: we don't have process.cwd() so we use '/' as a fallback\n    var path = (i >= 0) ? arguments[i] : '/';\n\n    // Skip empty and invalid entries\n    if (typeof path !== 'string' || !path) {\n      continue;\n    }\n\n    resolvedPath = path + '/' + resolvedPath;\n    resolvedAbsolute = path.charAt(0) === '/';\n  }\n\n  // At this point the path should be resolved to a full absolute path, but\n  // handle relative paths to be safe (might happen when process.cwd() fails)\n\n  // Normalize the path\n  resolvedPath = normalizeArray(resolvedPath.split('/').filter(function(p) {\n    return !!p;\n  }), !resolvedAbsolute).join('/');\n\n  return ((resolvedAbsolute ? 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'/' : '') + path;\n}\n\nfunction join() {\n  var paths = Array.prototype.slice.call(arguments, 0);\n  return normalize(paths.filter(function(p, index) {\n    return p && typeof p === 'string';\n  }).join('/'));\n}\n\n// path.relative(from, to)\nfunction relative(from, to) {\n  from = resolve(from).substr(1);\n  to = resolve(to).substr(1);\n\n  function trim(arr) {\n    var start = 0;\n    for (; start < arr.length; start++) {\n      if (arr[start] !== '') break;\n    }\n\n    var end = arr.length - 1;\n    for (; end >= 0; end--) {\n      if (arr[end] !== '') break;\n    }\n\n    if (start > end) return [];\n    return arr.slice(start, end - start + 1);\n  }\n\n  var fromParts = trim(from.split('/'));\n  var toParts = trim(to.split('/'));\n\n  var length = Math.min(fromParts.length, toParts.length);\n  var samePartsLength = length;\n  for (var i = 0; i < length; i++) {\n    if (fromParts[i] !== toParts[i]) {\n      samePartsLength = i;\n      break;\n    }\n  }\n\n  var outputParts = [];\n  for (var i = samePartsLength; i < fromParts.length; i++) {\n    outputParts.push('..');\n  }\n\n  outputParts = outputParts.concat(toParts.slice(samePartsLength));\n\n  return outputParts.join('/');\n}\n\nfunction dirname(path) {\n  var result = splitPath(path),\n      root = result[0],\n      dir = result[1];\n\n  if (!root && !dir) {\n    // No dirname whatsoever\n    return '.';\n  }\n\n  if (dir) {\n    // It has a dirname, strip trailing slash\n    dir = dir.substr(0, dir.length - 1);\n  }\n\n  return root + dir;\n}\n\nfunction basename(path, ext) {\n  var f = splitPath(path)[2];\n  // TODO: make this comparison case-insensitive on windows?\n  if (ext && f.substr(-1 * ext.length) === ext) {\n    f = f.substr(0, f.length - ext.length);\n  }\n  // XXXfiler: node.js just does `return f`\n  return f === \"\" ? \"/\" : f;\n}\n\nfunction extname(path) {\n  return splitPath(path)[3];\n}\n\nfunction isAbsolute(path) {\n  if(path.charAt(0) === '/') {\n    return true;\n  }\n  return false;\n}\n\nfunction isNull(path) {\n  if (('' + path).indexOf('\\u0000') !== -1) {\n    return true;\n  }\n  return false;\n}\n\n// Make sure we don't double-add a trailing slash (e.g., '/' -> '//')\nfunction addTrailing(path) {\n  return path.replace(/\\/*$/, '/');\n}\n\n// Deal with multiple slashes at the end, one, or none\n// and make sure we don't return the empty string.\nfunction removeTrailing(path) {\n  path = path.replace(/\\/*$/, '');\n  return path === '' ? '/' : path;\n}\n\n// XXXfiler: we don't support path.exists() or path.existsSync(), which\n// are deprecated, and need a FileSystem instance to work. Use fs.stat().\n\nmodule.exports = {\n  normalize: normalize,\n  resolve: resolve,\n  join: join,\n  relative: relative,\n  sep: '/',\n  delimiter: ':',\n  dirname: dirname,\n  basename: basename,\n  extname: extname,\n  isAbsolute: isAbsolute,\n  isNull: isNull,\n  // Non-node but useful...\n  addTrailing: addTrailing,\n  removeTrailing: removeTrailing\n};\n","function guid() {\n  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {\n    var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);\n    return v.toString(16);\n  }).toUpperCase();\n}\n\nfunction nop() {}\n\n/**\n * Convert a Uint8Array to a regular array\n */\nfunction u8toArray(u8) {\n  var array = [];\n  var len = u8.length;\n  for(var i = 0; i < len; i++) {\n    array[i] = u8[i];\n  }\n  return array;\n}\n\nmodule.exports = {\n  guid: guid,\n  u8toArray: u8toArray,\n  nop: nop\n};\n","var O_READ = 'READ';\nvar O_WRITE = 'WRITE';\nvar O_CREATE = 'CREATE';\nvar O_EXCLUSIVE = 'EXCLUSIVE';\nvar O_TRUNCATE = 'TRUNCATE';\nvar O_APPEND = 'APPEND';\nvar XATTR_CREATE = 'CREATE';\nvar XATTR_REPLACE = 'REPLACE';\n\nmodule.exports = {\n  FILE_SYSTEM_NAME: 'local',\n\n  FILE_STORE_NAME: 'files',\n\n  IDB_RO: 'readonly',\n  IDB_RW: 'readwrite',\n\n  WSQL_VERSION: \"1\",\n  WSQL_SIZE: 5 * 1024 * 1024,\n  WSQL_DESC: \"FileSystem Storage\",\n\n  MODE_FILE: 'FILE',\n  MODE_DIRECTORY: 'DIRECTORY',\n  MODE_SYMBOLIC_LINK: 'SYMLINK',\n  MODE_META: 'META',\n\n  SYMLOOP_MAX: 10,\n\n  BINARY_MIME_TYPE: 'application/octet-stream',\n  JSON_MIME_TYPE: 'application/json',\n\n  ROOT_DIRECTORY_NAME: '/', // basename(normalize(path))\n\n  // FS Mount Flags\n  FS_FORMAT: 'FORMAT',\n  FS_NOCTIME: 'NOCTIME',\n  FS_NOMTIME: 'NOMTIME',\n  FS_NODUPEIDCHECK: 'FS_NODUPEIDCHECK',\n\n  // FS File Open Flags\n  O_READ: O_READ,\n  O_WRITE: O_WRITE,\n  O_CREATE: O_CREATE,\n  O_EXCLUSIVE: O_EXCLUSIVE,\n  O_TRUNCATE: O_TRUNCATE,\n  O_APPEND: O_APPEND,\n\n  O_FLAGS: {\n    'r': [O_READ],\n    'r+': [O_READ, O_WRITE],\n    'w': [O_WRITE, O_CREATE, O_TRUNCATE],\n    'w+': [O_WRITE, O_READ, O_CREATE, O_TRUNCATE],\n    'wx': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],\n    'wx+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],\n    'a': [O_WRITE, O_CREATE, O_APPEND],\n    'a+': [O_WRITE, O_READ, O_CREATE, O_APPEND],\n    'ax': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_APPEND],\n    'ax+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_APPEND]\n  },\n\n  XATTR_CREATE: XATTR_CREATE,\n  XATTR_REPLACE: XATTR_REPLACE,\n\n  FS_READY: 'READY',\n  FS_PENDING: 'PENDING',\n  FS_ERROR: 'ERROR',\n\n  SUPER_NODE_ID: '00000000-0000-0000-0000-000000000000',\n\n  // Reserved File Descriptors for streams\n  STDIN: 0,\n  STDOUT: 1,\n  STDERR: 2,\n  FIRST_DESCRIPTOR: 3,\n\n  ENVIRONMENT: {\n    TMP: '/tmp',\n    PATH: ''\n  }\n};\n","var errors = {};\n[\n  /**\n   * node.js errors - we only use some of these, add as needed.\n   */\n  //'-1:UNKNOWN:unknown error',\n  //'0:OK:success',\n  //'1:EOF:end of file',\n  //'2:EADDRINFO:getaddrinfo error',\n  //'3:EACCES:permission denied',\n  //'4:EAGAIN:resource temporarily unavailable',\n  //'5:EADDRINUSE:address already in use',\n  //'6:EADDRNOTAVAIL:address not available',\n  //'7:EAFNOSUPPORT:address family not supported',\n  //'8:EALREADY:connection already in progress',\n  '9:EBADF:bad file descriptor',\n  '10:EBUSY:resource busy or locked',\n  //'11:ECONNABORTED:software caused connection abort',\n  //'12:ECONNREFUSED:connection refused',\n  //'13:ECONNRESET:connection reset by peer',\n  //'14:EDESTADDRREQ:destination address required',\n  //'15:EFAULT:bad address in system call argument',\n  //'16:EHOSTUNREACH:host is unreachable',\n  //'17:EINTR:interrupted system call',\n  '18:EINVAL:invalid argument',\n  //'19:EISCONN:socket is already connected',\n  //'20:EMFILE:too many open files',\n  //'21:EMSGSIZE:message too long',\n  //'22:ENETDOWN:network is down',\n  //'23:ENETUNREACH:network is unreachable',\n  //'24:ENFILE:file table overflow',\n  //'25:ENOBUFS:no buffer space available',\n  //'26:ENOMEM:not enough memory',\n  '27:ENOTDIR:not a directory',\n  '28:EISDIR:illegal operation on a directory',\n  //'29:ENONET:machine is not on the network',\n  // errno 30 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js\n  //'31:ENOTCONN:socket is not connected',\n  //'32:ENOTSOCK:socket operation on non-socket',\n  //'33:ENOTSUP:operation not supported on socket',\n  '34:ENOENT:no such file or directory',\n  //'35:ENOSYS:function not implemented',\n  //'36:EPIPE:broken pipe',\n  //'37:EPROTO:protocol error',\n  //'38:EPROTONOSUPPORT:protocol not supported',\n  //'39:EPROTOTYPE:protocol wrong type for socket',\n  //'40:ETIMEDOUT:connection timed out',\n  //'41:ECHARSET:invalid Unicode character',\n  //'42:EAIFAMNOSUPPORT:address family for hostname not supported',\n  // errno 43 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js\n  //'44:EAISERVICE:servname not supported for ai_socktype',\n  //'45:EAISOCKTYPE:ai_socktype not supported',\n  //'46:ESHUTDOWN:cannot send after transport endpoint shutdown',\n  '47:EEXIST:file already exists',\n  //'48:ESRCH:no such process',\n  //'49:ENAMETOOLONG:name too long',\n  '50:EPERM:operation not permitted',\n  '51:ELOOP:too many symbolic links encountered',\n  //'52:EXDEV:cross-device link not permitted',\n  '53:ENOTEMPTY:directory not empty',\n  //'54:ENOSPC:no space left on device',\n  '55:EIO:i/o error',\n  //'56:EROFS:read-only file system',\n  //'57:ENODEV:no such device',\n  //'58:ESPIPE:invalid seek',\n  //'59:ECANCELED:operation canceled',\n\n  /**\n   * Filer specific errors\n   */\n  '1000:ENOTMOUNTED:not mounted',\n  '1001:EFILESYSTEMERROR:missing super node, use \\'FORMAT\\' flag to format filesystem.',\n  '1002:ENOATTR:attribute does not exist'\n\n].forEach(function(e) {\n  e = e.split(':');\n  var errno = +e[0];\n  var errName = e[1];\n  var defaultMessage = e[2];\n\n  function FilerError(msg, path) {\n    Error.call(this);\n\n    this.name = errName;\n    this.code = errName;\n    this.errno = errno;\n    this.message = msg || defaultMessage;\n    if(path) {\n      this.path = path;\n    }\n    this.stack = (new Error(this.message)).stack;\n  }\n  FilerError.prototype = Object.create(Error.prototype);\n  FilerError.prototype.constructor = FilerError;\n  FilerError.prototype.toString = function() {\n    var pathInfo = this.path ? (', \\'' + this.path + '\\'') : '';\n    return this.name + ': ' + this.message + pathInfo;\n  };\n\n  // We expose the error as both Errors.EINVAL and Errors[18]\n  errors[errName] = errors[errno] = FilerError;\n});\n\nmodule.exports = errors;\n","'use strict'\n\nexports.byteLength = byteLength\nexports.toByteArray = toByteArray\nexports.fromByteArray = fromByteArray\n\nvar lookup = []\nvar revLookup = []\nvar Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array\n\nvar code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'\nfor (var i = 0, len = code.length; i < len; ++i) {\n  lookup[i] = code[i]\n  revLookup[code.charCodeAt(i)] = i\n}\n\n// Support decoding URL-safe base64 strings, as Node.js does.\n// See: https://en.wikipedia.org/wiki/Base64#URL_applications\nrevLookup['-'.charCodeAt(0)] = 62\nrevLookup['_'.charCodeAt(0)] = 63\n\nfunction getLens (b64) {\n  var len = b64.length\n\n  if (len % 4 > 0) {\n    throw new Error('Invalid string. Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  for (var i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(\n      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)\n    ))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};\n","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; ++i) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n\nfunction isnan (val) {\n  return val !== val // eslint-disable-line no-self-compare\n}\n","function FilerBuffer (subject, encoding, nonZero) {\n\n  // Automatically turn ArrayBuffer into Uint8Array so that underlying\n  // Buffer code doesn't just throw away and ignore ArrayBuffer data.\n  if (subject instanceof ArrayBuffer) {\n    subject = new Uint8Array(subject);\n  }\n\n  return new Buffer(subject, encoding, nonZero);\n};\n\n// Inherit prototype from Buffer\nFilerBuffer.prototype = Object.create(Buffer.prototype);\nFilerBuffer.prototype.constructor = FilerBuffer;\n\n// Also copy static methods onto FilerBuffer ctor\nObject.keys(Buffer).forEach(function (p) {\n  if (Buffer.hasOwnProperty(p)) {\n    FilerBuffer[p] = Buffer[p];\n  }\n});\n\nmodule.exports = FilerBuffer;\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\nvar FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;\nvar IDB_RW = require('../constants.js').IDB_RW;\nvar IDB_RO = require('../constants.js').IDB_RO;\nvar Errors = require('../errors.js');\nvar FilerBuffer = require('../buffer.js');\n\nvar indexedDB = global.indexedDB       ||\n                global.mozIndexedDB    ||\n                global.webkitIndexedDB ||\n                global.msIndexedDB;\n\nfunction IndexedDBContext(db, mode) {\n  this.db = db;\n  this.mode = mode;\n}\n\nIndexedDBContext.prototype._getObjectStore = function() {\n  if(this.objectStore) {\n    return this.objectStore;\n  }\n\n  var transaction = this.db.transaction(FILE_STORE_NAME, this.mode);\n  this.objectStore = transaction.objectStore(FILE_STORE_NAME);\n  return this.objectStore;\n};\n\nIndexedDBContext.prototype.clear = function(callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.clear();\n    request.onsuccess = function() {\n      callback();\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\nIndexedDBContext.prototype._get = function(key, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.get(key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\nIndexedDBContext.prototype.getObject = function(key, callback) {\n  this._get(key, callback);\n};\nIndexedDBContext.prototype.getBuffer = function(key, callback) {\n  this._get(key, function(err, arrayBuffer) {\n    if(err) {\n      return callback(err);\n    }\n    callback(null, new FilerBuffer(arrayBuffer));\n  });\n};\n\nIndexedDBContext.prototype._put = function(key, value, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.put(value, key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\nIndexedDBContext.prototype.putObject = function(key, value, callback) {\n  this._put(key, value, callback);\n};\nIndexedDBContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {\n  var buf = uint8BackedBuffer.buffer;\n  this._put(key, buf, callback);\n};\n\nIndexedDBContext.prototype.delete = function(key, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.delete(key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\n\nfunction IndexedDB(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n  this.db = null;\n}\nIndexedDB.isSupported = function() {\n  return !!indexedDB;\n};\n\nIndexedDB.prototype.open = function(callback) {\n  var that = this;\n\n  // Bail if we already have a db open\n  if(that.db) {\n    return callback();\n  }\n\n  try {\n    // NOTE: we're not using versioned databases.\n    var openRequest = indexedDB.open(that.name);\n\n    // If the db doesn't exist, we'll create it\n    openRequest.onupgradeneeded = function onupgradeneeded(event) {\n      var db = event.target.result;\n\n      if(db.objectStoreNames.contains(FILE_STORE_NAME)) {\n        db.deleteObjectStore(FILE_STORE_NAME);\n      }\n      db.createObjectStore(FILE_STORE_NAME);\n    };\n\n    openRequest.onsuccess = function onsuccess(event) {\n      that.db = event.target.result;\n      callback();\n    };\n    openRequest.onerror = function onerror(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\nIndexedDB.prototype.getReadOnlyContext = function() {\n  return new IndexedDBContext(this.db, IDB_RO);\n};\nIndexedDB.prototype.getReadWriteContext = function() {\n  return new IndexedDBContext(this.db, IDB_RW);\n};\n\nmodule.exports = IndexedDB;\n","/*\n * base64-arraybuffer\n * https://github.com/niklasvh/base64-arraybuffer\n *\n * Copyright (c) 2012 Niklas von Hertzen\n * Licensed under the MIT license.\n */\n(function(){\n  \"use strict\";\n\n  var chars = \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/\";\n\n  // Use a lookup table to find the index.\n  var lookup = new Uint8Array(256);\n  for (var i = 0; i < chars.length; i++) {\n    lookup[chars.charCodeAt(i)] = i;\n  }\n\n  exports.encode = function(arraybuffer) {\n    var bytes = new Uint8Array(arraybuffer),\n    i, len = bytes.length, base64 = \"\";\n\n    for (i = 0; i < len; i+=3) {\n      base64 += chars[bytes[i] >> 2];\n      base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];\n      base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];\n      base64 += chars[bytes[i + 2] & 63];\n    }\n\n    if ((len % 3) === 2) {\n      base64 = base64.substring(0, base64.length - 1) + \"=\";\n    } else if (len % 3 === 1) {\n      base64 = base64.substring(0, base64.length - 2) + \"==\";\n    }\n\n    return base64;\n  };\n\n  exports.decode =  function(base64) {\n    var bufferLength = base64.length * 0.75,\n    len = base64.length, i, p = 0,\n    encoded1, encoded2, encoded3, encoded4;\n\n    if (base64[base64.length - 1] === \"=\") {\n      bufferLength--;\n      if (base64[base64.length - 2] === \"=\") {\n        bufferLength--;\n      }\n    }\n\n    var arraybuffer = new ArrayBuffer(bufferLength),\n    bytes = new Uint8Array(arraybuffer);\n\n    for (i = 0; i < len; i+=4) {\n      encoded1 = lookup[base64.charCodeAt(i)];\n      encoded2 = lookup[base64.charCodeAt(i+1)];\n      encoded3 = lookup[base64.charCodeAt(i+2)];\n      encoded4 = lookup[base64.charCodeAt(i+3)];\n\n      bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);\n      bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);\n      bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);\n    }\n\n    return arraybuffer;\n  };\n})();\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\nvar FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;\nvar WSQL_VERSION = require('../constants.js').WSQL_VERSION;\nvar WSQL_SIZE = require('../constants.js').WSQL_SIZE;\nvar WSQL_DESC = require('../constants.js').WSQL_DESC;\nvar Errors = require('../errors.js');\nvar FilerBuffer = require('../buffer.js');\nvar base64ArrayBuffer = require('base64-arraybuffer');\n\nfunction WebSQLContext(db, isReadOnly) {\n  var that = this;\n  this.getTransaction = function(callback) {\n    if(that.transaction) {\n      callback(that.transaction);\n      return;\n    }\n    // Either do readTransaction() (read-only) or transaction() (read/write)\n    db[isReadOnly ? 'readTransaction' : 'transaction'](function(transaction) {\n      that.transaction = transaction;\n      callback(transaction);\n    });\n  };\n}\n\nWebSQLContext.prototype.clear = function(callback) {\n  function onError(transaction, error) {\n    callback(error);\n  }\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  this.getTransaction(function(transaction) {\n    transaction.executeSql(\"DELETE FROM \" + FILE_STORE_NAME + \";\",\n                           [], onSuccess, onError);\n  });\n};\n\nfunction _get(getTransaction, key, callback) {\n  function onSuccess(transaction, result) {\n    // If the key isn't found, return null\n    var value = result.rows.length === 0 ? null : result.rows.item(0).data;\n    callback(null, value);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  getTransaction(function(transaction) {\n    transaction.executeSql(\"SELECT data FROM \" + FILE_STORE_NAME + \" WHERE id = ? LIMIT 1;\",\n                           [key], onSuccess, onError);\n  });\n}\nWebSQLContext.prototype.getObject = function(key, callback) {\n  _get(this.getTransaction, key, function(err, result) {\n    if(err) {\n      return callback(err);\n    }\n\n    try {\n      if(result) {\n        result = JSON.parse(result);\n      }\n    } catch(e) {\n      return callback(e);\n    }\n\n    callback(null, result);\n  });\n};\nWebSQLContext.prototype.getBuffer = function(key, callback) {\n  _get(this.getTransaction, key, function(err, result) {\n    if(err) {\n      return callback(err);\n    }\n\n    // Deal with zero-length ArrayBuffers, which will be encoded as ''\n    if(result || result === '') {\n      var arrayBuffer = base64ArrayBuffer.decode(result);\n      result = new FilerBuffer(arrayBuffer);\n    }\n\n    callback(null, result);\n  });\n};\n\nfunction _put(getTransaction, key, value, callback) {\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  getTransaction(function(transaction) {\n    transaction.executeSql(\"INSERT OR REPLACE INTO \" + FILE_STORE_NAME + \" (id, data) VALUES (?, ?);\",\n                           [key, value], onSuccess, onError);\n  });\n}\nWebSQLContext.prototype.putObject = function(key, value, callback) {\n  var json = JSON.stringify(value);\n  _put(this.getTransaction, key, json, callback);\n};\nWebSQLContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {\n  var base64 = base64ArrayBuffer.encode(uint8BackedBuffer.buffer);\n  _put(this.getTransaction, key, base64, callback);\n};\n\nWebSQLContext.prototype.delete = function(key, callback) {\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  this.getTransaction(function(transaction) {\n    transaction.executeSql(\"DELETE FROM \" + FILE_STORE_NAME + \" WHERE id = ?;\",\n                           [key], onSuccess, onError);\n  });\n};\n\n\nfunction WebSQL(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n  this.db = null;\n}\nWebSQL.isSupported = function() {\n  return !!global.openDatabase;\n};\n\nWebSQL.prototype.open = function(callback) {\n  var that = this;\n\n  // Bail if we already have a db open\n  if(that.db) {\n    return callback();\n  }\n\n  var db = global.openDatabase(that.name, WSQL_VERSION, WSQL_DESC, WSQL_SIZE);\n  if(!db) {\n    callback(\"[WebSQL] Unable to open database.\");\n    return;\n  }\n\n  function onError(transaction, error) {\n    if (error.code === 5) {\n      callback(new Errors.EINVAL('WebSQL cannot be accessed. If private browsing is enabled, disable it.'));\n    }\n    callback(error);\n  }\n  function onSuccess(transaction, result) {\n    that.db = db;\n    callback();\n  }\n\n  // Create the table and index we'll need to store the fs data.\n  db.transaction(function(transaction) {\n    function createIndex(transaction) {\n      transaction.executeSql(\"CREATE INDEX IF NOT EXISTS idx_\" + FILE_STORE_NAME + \"_id\" +\n                             \" on \" + FILE_STORE_NAME + \" (id);\",\n                             [], onSuccess, onError);\n    }\n    transaction.executeSql(\"CREATE TABLE IF NOT EXISTS \" + FILE_STORE_NAME + \" (id unique, data TEXT);\",\n                           [], createIndex, onError);\n  });\n};\nWebSQL.prototype.getReadOnlyContext = function() {\n  return new WebSQLContext(this.db, true);\n};\nWebSQL.prototype.getReadWriteContext = function() {\n  return new WebSQLContext(this.db, false);\n};\n\nmodule.exports = WebSQL;\n","// shim for using process in browser\nvar process = module.exports = {};\n\n// cached from whatever global is present so that test runners that stub it\n// don't break things.  But we need to wrap it in a try catch in case it is\n// wrapped in strict mode code which doesn't define any globals.  It's inside a\n// function because try/catches deoptimize in certain engines.\n\nvar cachedSetTimeout;\nvar cachedClearTimeout;\n\nfunction defaultSetTimout() {\n    throw new Error('setTimeout has not been defined');\n}\nfunction defaultClearTimeout () {\n    throw new Error('clearTimeout has not been defined');\n}\n(function () {\n    try {\n        if (typeof setTimeout === 'function') {\n            cachedSetTimeout = setTimeout;\n        } else {\n            cachedSetTimeout = defaultSetTimout;\n        }\n    } catch (e) {\n        cachedSetTimeout = defaultSetTimout;\n    }\n    try {\n        if (typeof clearTimeout === 'function') {\n            cachedClearTimeout = clearTimeout;\n        } else {\n            cachedClearTimeout = defaultClearTimeout;\n        }\n    } catch (e) {\n        cachedClearTimeout = defaultClearTimeout;\n    }\n} ())\nfunction runTimeout(fun) {\n    if (cachedSetTimeout === setTimeout) {\n        //normal enviroments in sane situations\n        return setTimeout(fun, 0);\n    }\n    // if setTimeout wasn't available but was latter defined\n    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {\n        cachedSetTimeout = setTimeout;\n        return setTimeout(fun, 0);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedSetTimeout(fun, 0);\n    } catch(e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally\n            return cachedSetTimeout.call(null, fun, 0);\n        } catch(e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error\n            return cachedSetTimeout.call(this, fun, 0);\n        }\n    }\n\n\n}\nfunction runClearTimeout(marker) {\n    if (cachedClearTimeout === clearTimeout) {\n        //normal enviroments in sane situations\n        return clearTimeout(marker);\n    }\n    // if clearTimeout wasn't available but was latter defined\n    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {\n        cachedClearTimeout = clearTimeout;\n        return clearTimeout(marker);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedClearTimeout(marker);\n    } catch (e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally\n            return cachedClearTimeout.call(null, marker);\n        } catch (e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.\n            // Some versions of I.E. have different rules for clearTimeout vs setTimeout\n            return cachedClearTimeout.call(this, marker);\n        }\n    }\n\n\n\n}\nvar queue = [];\nvar draining = false;\nvar currentQueue;\nvar queueIndex = -1;\n\nfunction cleanUpNextTick() {\n    if (!draining || !currentQueue) {\n        return;\n    }\n    draining = false;\n    if (currentQueue.length) {\n        queue = currentQueue.concat(queue);\n    } else {\n        queueIndex = -1;\n    }\n    if (queue.length) {\n        drainQueue();\n    }\n}\n\nfunction drainQueue() {\n    if (draining) {\n        return;\n    }\n    var timeout = runTimeout(cleanUpNextTick);\n    draining = true;\n\n    var len = queue.length;\n    while(len) {\n        currentQueue = queue;\n        queue = [];\n        while (++queueIndex < len) {\n            if (currentQueue) {\n                currentQueue[queueIndex].run();\n            }\n        }\n        queueIndex = -1;\n        len = queue.length;\n    }\n    currentQueue = null;\n    draining = false;\n    runClearTimeout(timeout);\n}\n\nprocess.nextTick = function (fun) {\n    var args = new Array(arguments.length - 1);\n    if (arguments.length > 1) {\n        for (var i = 1; i < arguments.length; i++) {\n            args[i - 1] = arguments[i];\n        }\n    }\n    queue.push(new Item(fun, args));\n    if (queue.length === 1 && !draining) {\n        runTimeout(drainQueue);\n    }\n};\n\n// v8 likes predictible objects\nfunction Item(fun, array) {\n    this.fun = fun;\n    this.array = array;\n}\nItem.prototype.run = function () {\n    this.fun.apply(null, this.array);\n};\nprocess.title = 'browser';\nprocess.browser = true;\nprocess.env = {};\nprocess.argv = [];\nprocess.version = ''; // empty string to avoid regexp issues\nprocess.versions = {};\n\nfunction noop() {}\n\nprocess.on = noop;\nprocess.addListener = noop;\nprocess.once = noop;\nprocess.off = noop;\nprocess.removeListener = noop;\nprocess.removeAllListeners = noop;\nprocess.emit = noop;\nprocess.prependListener = noop;\nprocess.prependOnceListener = noop;\n\nprocess.listeners = function (name) { return [] }\n\nprocess.binding = function (name) {\n    throw new Error('process.binding is not supported');\n};\n\nprocess.cwd = function () { return '/' };\nprocess.chdir = function (dir) {\n    throw new Error('process.chdir is not supported');\n};\nprocess.umask = function() { return 0; };\n","/*global setImmediate: false, setTimeout: false, console: false */\n\n/**\n * async.js shim, based on https://raw.github.com/caolan/async/master/lib/async.js Feb 18, 2014\n * Used under MIT - https://github.com/caolan/async/blob/master/LICENSE\n */\n\n(function () {\n\n    var async = {};\n\n    // async.js functions used in Filer\n\n    //// nextTick implementation with browser-compatible fallback ////\n    if (typeof process === 'undefined' || !(process.nextTick)) {\n        if (typeof setImmediate === 'function') {\n            async.nextTick = function (fn) {\n                // not a direct alias for IE10 compatibility\n                setImmediate(fn);\n            };\n            async.setImmediate = async.nextTick;\n        }\n        else {\n            async.nextTick = function (fn) {\n                setTimeout(fn, 0);\n            };\n            async.setImmediate = async.nextTick;\n        }\n    }\n    else {\n        async.nextTick = process.nextTick;\n        if (typeof setImmediate !== 'undefined') {\n            async.setImmediate = function (fn) {\n              // not a direct alias for IE10 compatibility\n              setImmediate(fn);\n            };\n        }\n        else {\n            async.setImmediate = async.nextTick;\n        }\n    }\n\n    async.eachSeries = function (arr, iterator, callback) {\n        callback = callback || function () {};\n        if (!arr.length) {\n            return callback();\n        }\n        var completed = 0;\n        var iterate = function () {\n            iterator(arr[completed], function (err) {\n                if (err) {\n                    callback(err);\n                    callback = function () {};\n                }\n                else {\n                    completed += 1;\n                    if (completed >= arr.length) {\n                        callback();\n                    }\n                    else {\n                        iterate();\n                    }\n                }\n            });\n        };\n        iterate();\n    };\n    async.forEachSeries = async.eachSeries;\n\n    // AMD / RequireJS\n    if (typeof define !== 'undefined' && define.amd) {\n        define([], function () {\n            return async;\n        });\n    }\n    // Node.js\n    else if (typeof module !== 'undefined' && module.exports) {\n        module.exports = async;\n    }\n    // included directly via <script> tag\n    else {\n        root.async = async;\n    }\n\n}());\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\n// NOTE: prefer setImmediate to nextTick for proper recursion yielding.\n// see https://github.com/js-platform/filer/pull/24\nvar asyncCallback = require('../../lib/async.js').setImmediate;\n\n/**\n * Make shared in-memory DBs possible when using the same name.\n */\nvar createDB = (function() {\n  var pool = {};\n  return function getOrCreate(name) {\n    if(!pool.hasOwnProperty(name)) {\n      pool[name] = {};\n    }\n    return pool[name];\n  };\n}());\n\nfunction MemoryContext(db, readOnly) {\n  this.readOnly = readOnly;\n  this.objectStore = db;\n}\n\nMemoryContext.prototype.clear = function(callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  var objectStore = this.objectStore;\n  Object.keys(objectStore).forEach(function(key){\n    delete objectStore[key];\n  });\n  asyncCallback(callback);\n};\n\n// Memory context doesn't care about differences between Object and Buffer\nMemoryContext.prototype.getObject =\nMemoryContext.prototype.getBuffer =\nfunction(key, callback) {\n  var that = this;\n  asyncCallback(function() {\n    callback(null, that.objectStore[key]);\n  });\n};\nMemoryContext.prototype.putObject =\nMemoryContext.prototype.putBuffer =\nfunction(key, value, callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  this.objectStore[key] = value;\n  asyncCallback(callback);\n};\n\nMemoryContext.prototype.delete = function(key, callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  delete this.objectStore[key];\n  asyncCallback(callback);\n};\n\n\nfunction Memory(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n}\nMemory.isSupported = function() {\n  return true;\n};\n\nMemory.prototype.open = function(callback) {\n  this.db = createDB(this.name);\n  asyncCallback(callback);\n};\nMemory.prototype.getReadOnlyContext = function() {\n  return new MemoryContext(this.db, true);\n};\nMemory.prototype.getReadWriteContext = function() {\n  return new MemoryContext(this.db, false);\n};\n\nmodule.exports = Memory;\n","var IndexedDB = require('./indexeddb.js');\nvar WebSQL = require('./websql.js');\nvar Memory = require('./memory.js');\n\nmodule.exports = {\n  IndexedDB: IndexedDB,\n  WebSQL: WebSQL,\n  Memory: Memory,\n\n  /**\n   * Convenience Provider references\n   */\n\n  // The default provider to use when none is specified\n  Default: IndexedDB,\n\n  // The Fallback provider does automatic fallback checks\n  Fallback: (function() {\n    if(IndexedDB.isSupported()) {\n      return IndexedDB;\n    }\n\n    if(WebSQL.isSupported()) {\n      return WebSQL;\n    }\n\n    function NotSupported() {\n      throw \"[Filer Error] Your browser doesn't support IndexedDB or WebSQL.\";\n    }\n    NotSupported.isSupported = function() {\n      return false;\n    };\n    return NotSupported;\n  }())\n};\n","var defaults = require('../constants.js').ENVIRONMENT;\n\nmodule.exports = function Environment(env) {\n  env = env || {};\n  env.TMP = env.TMP || defaults.TMP;\n  env.PATH = env.PATH || defaults.PATH;\n\n  this.get = function(name) {\n    return env[name];\n  };\n\n  this.set = function(name, value) {\n    env[name] = value;\n  };\n};\n","// Adapt encodings to work with Buffer or Uint8Array, they expect the latter\nfunction decode(buf) {\n  return buf.toString('utf8');\n}\n\nfunction encode(string) {\n  return new Buffer(string, 'utf8');\n}\n\nmodule.exports = {\n  encode: encode,\n  decode: decode\n};\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// resolves . and .. elements in a path array with directory names there\n// must be no slashes, empty elements, or device names (c:\\) in the array\n// (so also no leading and trailing slashes - it does not distinguish\n// relative and absolute paths)\nfunction normalizeArray(parts, allowAboveRoot) {\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = parts.length - 1; i >= 0; i--) {\n    var last = parts[i];\n    if (last === '.') {\n      parts.splice(i, 1);\n    } else if (last === '..') {\n      parts.splice(i, 1);\n      up++;\n    } else if (up) {\n      parts.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (allowAboveRoot) {\n    for (; up--; up) {\n      parts.unshift('..');\n    }\n  }\n\n  return parts;\n}\n\n// Split a filename into [root, dir, basename, ext], unix version\n// 'root' is just a slash, or nothing.\nvar splitPathRe =\n    /^(\\/?|)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?|)(\\.[^.\\/]*|))(?:[\\/]*)$/;\nvar splitPath = function(filename) {\n  return splitPathRe.exec(filename).slice(1);\n};\n\n// path.resolve([from ...], to)\n// posix version\nexports.resolve = function() {\n  var resolvedPath = '',\n      resolvedAbsolute = false;\n\n  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {\n    var path = (i >= 0) ? arguments[i] : process.cwd();\n\n    // Skip empty and invalid entries\n    if (typeof path !== 'string') {\n      throw new TypeError('Arguments to path.resolve must be strings');\n    } else if (!path) {\n      continue;\n    }\n\n    resolvedPath = path + '/' + resolvedPath;\n    resolvedAbsolute = path.charAt(0) === '/';\n  }\n\n  // At this point the path should be resolved to a full absolute path, but\n  // handle relative paths to be safe (might happen when process.cwd() fails)\n\n  // Normalize the path\n  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {\n    return !!p;\n  }), !resolvedAbsolute).join('/');\n\n  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';\n};\n\n// path.normalize(path)\n// posix version\nexports.normalize = function(path) {\n  var isAbsolute = exports.isAbsolute(path),\n      trailingSlash = substr(path, -1) === '/';\n\n  // Normalize the path\n  path = normalizeArray(filter(path.split('/'), function(p) {\n    return !!p;\n  }), !isAbsolute).join('/');\n\n  if (!path && !isAbsolute) {\n    path = '.';\n  }\n  if (path && trailingSlash) {\n    path += '/';\n  }\n\n  return (isAbsolute ? '/' : '') + path;\n};\n\n// posix version\nexports.isAbsolute = function(path) {\n  return path.charAt(0) === '/';\n};\n\n// posix version\nexports.join = function() {\n  var paths = Array.prototype.slice.call(arguments, 0);\n  return exports.normalize(filter(paths, function(p, index) {\n    if (typeof p !== 'string') {\n      throw new TypeError('Arguments to path.join must be strings');\n    }\n    return p;\n  }).join('/'));\n};\n\n\n// path.relative(from, to)\n// posix version\nexports.relative = function(from, to) {\n  from = exports.resolve(from).substr(1);\n  to = exports.resolve(to).substr(1);\n\n  function trim(arr) {\n    var start = 0;\n    for (; start < arr.length; start++) {\n      if (arr[start] !== '') break;\n    }\n\n    var end = arr.length - 1;\n    for (; end >= 0; end--) {\n      if (arr[end] !== '') break;\n    }\n\n    if (start > end) return [];\n    return arr.slice(start, end - start + 1);\n  }\n\n  var fromParts = trim(from.split('/'));\n  var toParts = trim(to.split('/'));\n\n  var length = Math.min(fromParts.length, toParts.length);\n  var samePartsLength = length;\n  for (var i = 0; i < length; i++) {\n    if (fromParts[i] !== toParts[i]) {\n      samePartsLength = i;\n      break;\n    }\n  }\n\n  var outputParts = [];\n  for (var i = samePartsLength; i < fromParts.length; i++) {\n    outputParts.push('..');\n  }\n\n  outputParts = outputParts.concat(toParts.slice(samePartsLength));\n\n  return outputParts.join('/');\n};\n\nexports.sep = '/';\nexports.delimiter = ':';\n\nexports.dirname = function(path) {\n  var result = splitPath(path),\n      root = result[0],\n      dir = result[1];\n\n  if (!root && !dir) {\n    // No dirname whatsoever\n    return '.';\n  }\n\n  if (dir) {\n    // It has a dirname, strip trailing slash\n    dir = dir.substr(0, dir.length - 1);\n  }\n\n  return root + dir;\n};\n\n\nexports.basename = function(path, ext) {\n  var f = splitPath(path)[2];\n  // TODO: make this comparison case-insensitive on windows?\n  if (ext && f.substr(-1 * ext.length) === ext) {\n    f = f.substr(0, f.length - ext.length);\n  }\n  return f;\n};\n\n\nexports.extname = function(path) {\n  return splitPath(path)[3];\n};\n\nfunction filter (xs, f) {\n    if (xs.filter) return xs.filter(f);\n    var res = [];\n    for (var i = 0; i < xs.length; i++) {\n        if (f(xs[i], i, xs)) res.push(xs[i]);\n    }\n    return res;\n}\n\n// String.prototype.substr - negative index don't work in IE8\nvar substr = 'ab'.substr(-1) === 'b'\n    ? function (str, start, len) { return str.substr(start, len) }\n    : function (str, start, len) {\n        if (start < 0) start = str.length + start;\n        return str.substr(start, len);\n    }\n;\n","module.exports = function (xs, fn) {\n    var res = [];\n    for (var i = 0; i < xs.length; i++) {\n        var x = fn(xs[i], i);\n        if (isArray(x)) res.push.apply(res, x);\n        else res.push(x);\n    }\n    return res;\n};\n\nvar isArray = Array.isArray || function (xs) {\n    return Object.prototype.toString.call(xs) === '[object Array]';\n};\n","'use strict';\nmodule.exports = balanced;\nfunction balanced(a, b, str) {\n  if (a instanceof RegExp) a = maybeMatch(a, str);\n  if (b instanceof RegExp) b = maybeMatch(b, str);\n\n  var r = range(a, b, str);\n\n  return r && {\n    start: r[0],\n    end: r[1],\n    pre: str.slice(0, r[0]),\n    body: str.slice(r[0] + a.length, r[1]),\n    post: str.slice(r[1] + b.length)\n  };\n}\n\nfunction maybeMatch(reg, str) {\n  var m = str.match(reg);\n  return m ? m[0] : null;\n}\n\nbalanced.range = range;\nfunction range(a, b, str) {\n  var begs, beg, left, right, result;\n  var ai = str.indexOf(a);\n  var bi = str.indexOf(b, ai + 1);\n  var i = ai;\n\n  if (ai >= 0 && bi > 0) {\n    begs = [];\n    left = str.length;\n\n    while (i >= 0 && !result) {\n      if (i == ai) {\n        begs.push(i);\n        ai = str.indexOf(a, i + 1);\n      } else if (begs.length == 1) {\n        result = [ begs.pop(), bi ];\n      } else {\n        beg = begs.pop();\n        if (beg < left) {\n          left = beg;\n          right = bi;\n        }\n\n        bi = str.indexOf(b, i + 1);\n      }\n\n      i = ai < bi && ai >= 0 ? ai : bi;\n    }\n\n    if (begs.length) {\n      result = [ left, right ];\n    }\n  }\n\n  return result;\n}\n","var concatMap = require('concat-map');\nvar balanced = require('balanced-match');\n\nmodule.exports = expandTop;\n\nvar escSlash = '\\0SLASH'+Math.random()+'\\0';\nvar escOpen = '\\0OPEN'+Math.random()+'\\0';\nvar escClose = '\\0CLOSE'+Math.random()+'\\0';\nvar escComma = '\\0COMMA'+Math.random()+'\\0';\nvar escPeriod = '\\0PERIOD'+Math.random()+'\\0';\n\nfunction numeric(str) {\n  return parseInt(str, 10) == str\n    ? parseInt(str, 10)\n    : str.charCodeAt(0);\n}\n\nfunction escapeBraces(str) {\n  return str.split('\\\\\\\\').join(escSlash)\n            .split('\\\\{').join(escOpen)\n            .split('\\\\}').join(escClose)\n            .split('\\\\,').join(escComma)\n            .split('\\\\.').join(escPeriod);\n}\n\nfunction unescapeBraces(str) {\n  return str.split(escSlash).join('\\\\')\n            .split(escOpen).join('{')\n            .split(escClose).join('}')\n            .split(escComma).join(',')\n            .split(escPeriod).join('.');\n}\n\n\n// Basically just str.split(\",\"), but handling cases\n// where we have nested braced sections, which should be\n// treated as individual members, like {a,{b,c},d}\nfunction parseCommaParts(str) {\n  if (!str)\n    return [''];\n\n  var parts = [];\n  var m = balanced('{', '}', str);\n\n  if (!m)\n    return str.split(',');\n\n  var pre = m.pre;\n  var body = m.body;\n  var post = m.post;\n  var p = pre.split(',');\n\n  p[p.length-1] += '{' + body + '}';\n  var postParts = parseCommaParts(post);\n  if (post.length) {\n    p[p.length-1] += postParts.shift();\n    p.push.apply(p, postParts);\n  }\n\n  parts.push.apply(parts, p);\n\n  return parts;\n}\n\nfunction expandTop(str) {\n  if (!str)\n    return [];\n\n  // I don't know why Bash 4.3 does this, but it does.\n  // Anything starting with {} will have the first two bytes preserved\n  // but *only* at the top level, so {},a}b will not expand to anything,\n  // but a{},b}c will be expanded to [a}c,abc].\n  // One could argue that this is a bug in Bash, but since the goal of\n  // this module is to match Bash's rules, we escape a leading {}\n  if (str.substr(0, 2) === '{}') {\n    str = '\\\\{\\\\}' + str.substr(2);\n  }\n\n  return expand(escapeBraces(str), true).map(unescapeBraces);\n}\n\nfunction identity(e) {\n  return e;\n}\n\nfunction embrace(str) {\n  return '{' + str + '}';\n}\nfunction isPadded(el) {\n  return /^-?0\\d/.test(el);\n}\n\nfunction lte(i, y) {\n  return i <= y;\n}\nfunction gte(i, y) {\n  return i >= y;\n}\n\nfunction expand(str, isTop) {\n  var expansions = [];\n\n  var m = balanced('{', '}', str);\n  if (!m || /\\$$/.test(m.pre)) return [str];\n\n  var isNumericSequence = /^-?\\d+\\.\\.-?\\d+(?:\\.\\.-?\\d+)?$/.test(m.body);\n  var isAlphaSequence = /^[a-zA-Z]\\.\\.[a-zA-Z](?:\\.\\.-?\\d+)?$/.test(m.body);\n  var isSequence = isNumericSequence || isAlphaSequence;\n  var isOptions = m.body.indexOf(',') >= 0;\n  if (!isSequence && !isOptions) {\n    // {a},b}\n    if (m.post.match(/,.*\\}/)) {\n      str = m.pre + '{' + m.body + escClose + m.post;\n      return expand(str);\n    }\n    return [str];\n  }\n\n  var n;\n  if (isSequence) {\n    n = m.body.split(/\\.\\./);\n  } else {\n    n = parseCommaParts(m.body);\n    if (n.length === 1) {\n      // x{{a,b}}y ==> x{a}y x{b}y\n      n = expand(n[0], false).map(embrace);\n      if (n.length === 1) {\n        var post = m.post.length\n          ? expand(m.post, false)\n          : [''];\n        return post.map(function(p) {\n          return m.pre + n[0] + p;\n        });\n      }\n    }\n  }\n\n  // at this point, n is the parts, and we know it's not a comma set\n  // with a single entry.\n\n  // no need to expand pre, since it is guaranteed to be free of brace-sets\n  var pre = m.pre;\n  var post = m.post.length\n    ? expand(m.post, false)\n    : [''];\n\n  var N;\n\n  if (isSequence) {\n    var x = numeric(n[0]);\n    var y = numeric(n[1]);\n    var width = Math.max(n[0].length, n[1].length)\n    var incr = n.length == 3\n      ? Math.abs(numeric(n[2]))\n      : 1;\n    var test = lte;\n    var reverse = y < x;\n    if (reverse) {\n      incr *= -1;\n      test = gte;\n    }\n    var pad = n.some(isPadded);\n\n    N = [];\n\n    for (var i = x; test(i, y); i += incr) {\n      var c;\n      if (isAlphaSequence) {\n        c = String.fromCharCode(i);\n        if (c === '\\\\')\n          c = '';\n      } else {\n        c = String(i);\n        if (pad) {\n          var need = width - c.length;\n          if (need > 0) {\n            var z = new Array(need + 1).join('0');\n            if (i < 0)\n              c = '-' + z + c.slice(1);\n            else\n              c = z + c;\n          }\n        }\n      }\n      N.push(c);\n    }\n  } else {\n    N = concatMap(n, function(el) { return expand(el, false) });\n  }\n\n  for (var j = 0; j < N.length; j++) {\n    for (var k = 0; k < post.length; k++) {\n      var expansion = pre + N[j] + post[k];\n      if (!isTop || isSequence || expansion)\n        expansions.push(expansion);\n    }\n  }\n\n  return expansions;\n}\n\n","module.exports = minimatch\nminimatch.Minimatch = Minimatch\n\nvar path = { sep: '/' }\ntry {\n  path = require('path')\n} catch (er) {}\n\nvar GLOBSTAR = minimatch.GLOBSTAR = Minimatch.GLOBSTAR = {}\nvar expand = require('brace-expansion')\n\nvar plTypes = {\n  '!': { open: '(?:(?!(?:', close: '))[^/]*?)'},\n  '?': { open: '(?:', close: ')?' },\n  '+': { open: '(?:', close: ')+' },\n  '*': { open: '(?:', close: ')*' },\n  '@': { open: '(?:', close: ')' }\n}\n\n// any single thing other than /\n// don't need to escape / when using new RegExp()\nvar qmark = '[^/]'\n\n// * => any number of characters\nvar star = qmark + '*?'\n\n// ** when dots are allowed.  Anything goes, except .. and .\n// not (^ or / followed by one or two dots followed by $ or /),\n// followed by anything, any number of times.\nvar twoStarDot = '(?:(?!(?:\\\\\\/|^)(?:\\\\.{1,2})($|\\\\\\/)).)*?'\n\n// not a ^ or / followed by a dot,\n// followed by anything, any number of times.\nvar twoStarNoDot = '(?:(?!(?:\\\\\\/|^)\\\\.).)*?'\n\n// characters that need to be escaped in RegExp.\nvar reSpecials = charSet('().*{}+?[]^$\\\\!')\n\n// \"abc\" -> { a:true, b:true, c:true }\nfunction charSet (s) {\n  return s.split('').reduce(function (set, c) {\n    set[c] = true\n    return set\n  }, {})\n}\n\n// normalizes slashes.\nvar slashSplit = /\\/+/\n\nminimatch.filter = filter\nfunction filter (pattern, options) {\n  options = options || {}\n  return function (p, i, list) {\n    return minimatch(p, pattern, options)\n  }\n}\n\nfunction ext (a, b) {\n  a = a || {}\n  b = b || {}\n  var t = {}\n  Object.keys(b).forEach(function (k) {\n    t[k] = b[k]\n  })\n  Object.keys(a).forEach(function (k) {\n    t[k] = a[k]\n  })\n  return t\n}\n\nminimatch.defaults = function (def) {\n  if (!def || !Object.keys(def).length) return minimatch\n\n  var orig = minimatch\n\n  var m = function minimatch (p, pattern, options) {\n    return orig.minimatch(p, pattern, ext(def, options))\n  }\n\n  m.Minimatch = function Minimatch (pattern, options) {\n    return new orig.Minimatch(pattern, ext(def, options))\n  }\n\n  return m\n}\n\nMinimatch.defaults = function (def) {\n  if (!def || !Object.keys(def).length) return Minimatch\n  return minimatch.defaults(def).Minimatch\n}\n\nfunction minimatch (p, pattern, options) {\n  if (typeof pattern !== 'string') {\n    throw new TypeError('glob pattern string required')\n  }\n\n  if (!options) options = {}\n\n  // shortcut: comments match nothing.\n  if (!options.nocomment && pattern.charAt(0) === '#') {\n    return false\n  }\n\n  // \"\" only matches \"\"\n  if (pattern.trim() === '') return p === ''\n\n  return new Minimatch(pattern, options).match(p)\n}\n\nfunction Minimatch (pattern, options) {\n  if (!(this instanceof Minimatch)) {\n    return new Minimatch(pattern, options)\n  }\n\n  if (typeof pattern !== 'string') {\n    throw new TypeError('glob pattern string required')\n  }\n\n  if (!options) options = {}\n  pattern = pattern.trim()\n\n  // windows support: need to use /, not \\\n  if (path.sep !== '/') {\n    pattern = pattern.split(path.sep).join('/')\n  }\n\n  this.options = options\n  this.set = []\n  this.pattern = pattern\n  this.regexp = null\n  this.negate = false\n  this.comment = false\n  this.empty = false\n\n  // make the set of regexps etc.\n  this.make()\n}\n\nMinimatch.prototype.debug = function () {}\n\nMinimatch.prototype.make = make\nfunction make () {\n  // don't do it more than once.\n  if (this._made) return\n\n  var pattern = this.pattern\n  var options = this.options\n\n  // empty patterns and comments match nothing.\n  if (!options.nocomment && pattern.charAt(0) === '#') {\n    this.comment = true\n    return\n  }\n  if (!pattern) {\n    this.empty = true\n    return\n  }\n\n  // step 1: figure out negation, etc.\n  this.parseNegate()\n\n  // step 2: expand braces\n  var set = this.globSet = this.braceExpand()\n\n  if (options.debug) this.debug = console.error\n\n  this.debug(this.pattern, set)\n\n  // step 3: now we have a set, so turn each one into a series of path-portion\n  // matching patterns.\n  // These will be regexps, except in the case of \"**\", which is\n  // set to the GLOBSTAR object for globstar behavior,\n  // and will not contain any / characters\n  set = this.globParts = set.map(function (s) {\n    return s.split(slashSplit)\n  })\n\n  this.debug(this.pattern, set)\n\n  // glob --> regexps\n  set = set.map(function (s, si, set) {\n    return s.map(this.parse, this)\n  }, this)\n\n  this.debug(this.pattern, set)\n\n  // filter out everything that didn't compile properly.\n  set = set.filter(function (s) {\n    return s.indexOf(false) === -1\n  })\n\n  this.debug(this.pattern, set)\n\n  this.set = set\n}\n\nMinimatch.prototype.parseNegate = parseNegate\nfunction parseNegate () {\n  var pattern = this.pattern\n  var negate = false\n  var options = this.options\n  var negateOffset = 0\n\n  if (options.nonegate) return\n\n  for (var i = 0, l = pattern.length\n    ; i < l && pattern.charAt(i) === '!'\n    ; i++) {\n    negate = !negate\n    negateOffset++\n  }\n\n  if (negateOffset) this.pattern = pattern.substr(negateOffset)\n  this.negate = negate\n}\n\n// Brace expansion:\n// a{b,c}d -> abd acd\n// a{b,}c -> abc ac\n// a{0..3}d -> a0d a1d a2d a3d\n// a{b,c{d,e}f}g -> abg acdfg acefg\n// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg\n//\n// Invalid sets are not expanded.\n// a{2..}b -> a{2..}b\n// a{b}c -> a{b}c\nminimatch.braceExpand = function (pattern, options) {\n  return braceExpand(pattern, options)\n}\n\nMinimatch.prototype.braceExpand = braceExpand\n\nfunction braceExpand (pattern, options) {\n  if (!options) {\n    if (this instanceof Minimatch) {\n      options = this.options\n    } else {\n      options = {}\n    }\n  }\n\n  pattern = typeof pattern === 'undefined'\n    ? this.pattern : pattern\n\n  if (typeof pattern === 'undefined') {\n    throw new TypeError('undefined pattern')\n  }\n\n  if (options.nobrace ||\n    !pattern.match(/\\{.*\\}/)) {\n    // shortcut. no need to expand.\n    return [pattern]\n  }\n\n  return expand(pattern)\n}\n\n// parse a component of the expanded set.\n// At this point, no pattern may contain \"/\" in it\n// so we're going to return a 2d array, where each entry is the full\n// pattern, split on '/', and then turned into a regular expression.\n// A regexp is made at the end which joins each array with an\n// escaped /, and another full one which joins each regexp with |.\n//\n// Following the lead of Bash 4.1, note that \"**\" only has special meaning\n// when it is the *only* thing in a path portion.  Otherwise, any series\n// of * is equivalent to a single *.  Globstar behavior is enabled by\n// default, and can be disabled by setting options.noglobstar.\nMinimatch.prototype.parse = parse\nvar SUBPARSE = {}\nfunction parse (pattern, isSub) {\n  if (pattern.length > 1024 * 64) {\n    throw new TypeError('pattern is too long')\n  }\n\n  var options = this.options\n\n  // shortcuts\n  if (!options.noglobstar && pattern === '**') return GLOBSTAR\n  if (pattern === '') return ''\n\n  var re = ''\n  var hasMagic = !!options.nocase\n  var escaping = false\n  // ? => one single character\n  var patternListStack = []\n  var negativeLists = []\n  var stateChar\n  var inClass = false\n  var reClassStart = -1\n  var classStart = -1\n  // . and .. never match anything that doesn't start with .,\n  // even when options.dot is set.\n  var patternStart = pattern.charAt(0) === '.' ? '' // anything\n  // not (start or / followed by . or .. followed by / or end)\n  : options.dot ? '(?!(?:^|\\\\\\/)\\\\.{1,2}(?:$|\\\\\\/))'\n  : '(?!\\\\.)'\n  var self = this\n\n  function clearStateChar () {\n    if (stateChar) {\n      // we had some state-tracking character\n      // that wasn't consumed by this pass.\n      switch (stateChar) {\n        case '*':\n          re += star\n          hasMagic = true\n        break\n        case '?':\n          re += qmark\n          hasMagic = true\n        break\n        default:\n          re += '\\\\' + stateChar\n        break\n      }\n      self.debug('clearStateChar %j %j', stateChar, re)\n      stateChar = false\n    }\n  }\n\n  for (var i = 0, len = pattern.length, c\n    ; (i < len) && (c = pattern.charAt(i))\n    ; i++) {\n    this.debug('%s\\t%s %s %j', pattern, i, re, c)\n\n    // skip over any that are escaped.\n    if (escaping && reSpecials[c]) {\n      re += '\\\\' + c\n      escaping = false\n      continue\n    }\n\n    switch (c) {\n      case '/':\n        // completely not allowed, even escaped.\n        // Should already be path-split by now.\n        return false\n\n      case '\\\\':\n        clearStateChar()\n        escaping = true\n      continue\n\n      // the various stateChar values\n      // for the \"extglob\" stuff.\n      case '?':\n      case '*':\n      case '+':\n      case '@':\n      case '!':\n        this.debug('%s\\t%s %s %j <-- stateChar', pattern, i, re, c)\n\n        // all of those are literals inside a class, except that\n        // the glob [!a] means [^a] in regexp\n        if (inClass) {\n          this.debug('  in class')\n          if (c === '!' && i === classStart + 1) c = '^'\n          re += c\n          continue\n        }\n\n        // if we already have a stateChar, then it means\n        // that there was something like ** or +? in there.\n        // Handle the stateChar, then proceed with this one.\n        self.debug('call clearStateChar %j', stateChar)\n        clearStateChar()\n        stateChar = c\n        // if extglob is disabled, then +(asdf|foo) isn't a thing.\n        // just clear the statechar *now*, rather than even diving into\n        // the patternList stuff.\n        if (options.noext) clearStateChar()\n      continue\n\n      case '(':\n        if (inClass) {\n          re += '('\n          continue\n        }\n\n        if (!stateChar) {\n          re += '\\\\('\n          continue\n        }\n\n        patternListStack.push({\n          type: stateChar,\n          start: i - 1,\n          reStart: re.length,\n          open: plTypes[stateChar].open,\n          close: plTypes[stateChar].close\n        })\n        // negation is (?:(?!js)[^/]*)\n        re += stateChar === '!' ? '(?:(?!(?:' : '(?:'\n        this.debug('plType %j %j', stateChar, re)\n        stateChar = false\n      continue\n\n      case ')':\n        if (inClass || !patternListStack.length) {\n          re += '\\\\)'\n          continue\n        }\n\n        clearStateChar()\n        hasMagic = true\n        var pl = patternListStack.pop()\n        // negation is (?:(?!js)[^/]*)\n        // The others are (?:<pattern>)<type>\n        re += pl.close\n        if (pl.type === '!') {\n          negativeLists.push(pl)\n        }\n        pl.reEnd = re.length\n      continue\n\n      case '|':\n        if (inClass || !patternListStack.length || escaping) {\n          re += '\\\\|'\n          escaping = false\n          continue\n        }\n\n        clearStateChar()\n        re += '|'\n      continue\n\n      // these are mostly the same in regexp and glob\n      case '[':\n        // swallow any state-tracking char before the [\n        clearStateChar()\n\n        if (inClass) {\n          re += '\\\\' + c\n          continue\n        }\n\n        inClass = true\n        classStart = i\n        reClassStart = re.length\n        re += c\n      continue\n\n      case ']':\n        //  a right bracket shall lose its special\n        //  meaning and represent itself in\n        //  a bracket expression if it occurs\n        //  first in the list.  -- POSIX.2 2.8.3.2\n        if (i === classStart + 1 || !inClass) {\n          re += '\\\\' + c\n          escaping = false\n          continue\n        }\n\n        // handle the case where we left a class open.\n        // \"[z-a]\" is valid, equivalent to \"\\[z-a\\]\"\n        if (inClass) {\n          // split where the last [ was, make sure we don't have\n          // an invalid re. if so, re-walk the contents of the\n          // would-be class to re-translate any characters that\n          // were passed through as-is\n          // TODO: It would probably be faster to determine this\n          // without a try/catch and a new RegExp, but it's tricky\n          // to do safely.  For now, this is safe and works.\n          var cs = pattern.substring(classStart + 1, i)\n          try {\n            RegExp('[' + cs + ']')\n          } catch (er) {\n            // not a valid class!\n            var sp = this.parse(cs, SUBPARSE)\n            re = re.substr(0, reClassStart) + '\\\\[' + sp[0] + '\\\\]'\n            hasMagic = hasMagic || sp[1]\n            inClass = false\n            continue\n          }\n        }\n\n        // finish up the class.\n        hasMagic = true\n        inClass = false\n        re += c\n      continue\n\n      default:\n        // swallow any state char that wasn't consumed\n        clearStateChar()\n\n        if (escaping) {\n          // no need\n          escaping = false\n        } else if (reSpecials[c]\n          && !(c === '^' && inClass)) {\n          re += '\\\\'\n        }\n\n        re += c\n\n    } // switch\n  } // for\n\n  // handle the case where we left a class open.\n  // \"[abc\" is valid, equivalent to \"\\[abc\"\n  if (inClass) {\n    // split where the last [ was, and escape it\n    // this is a huge pita.  We now have to re-walk\n    // the contents of the would-be class to re-translate\n    // any characters that were passed through as-is\n    cs = pattern.substr(classStart + 1)\n    sp = this.parse(cs, SUBPARSE)\n    re = re.substr(0, reClassStart) + '\\\\[' + sp[0]\n    hasMagic = hasMagic || sp[1]\n  }\n\n  // handle the case where we had a +( thing at the *end*\n  // of the pattern.\n  // each pattern list stack adds 3 chars, and we need to go through\n  // and escape any | chars that were passed through as-is for the regexp.\n  // Go through and escape them, taking care not to double-escape any\n  // | chars that were already escaped.\n  for (pl = patternListStack.pop(); pl; pl = patternListStack.pop()) {\n    var tail = re.slice(pl.reStart + pl.open.length)\n    this.debug('setting tail', re, pl)\n    // maybe some even number of \\, then maybe 1 \\, followed by a |\n    tail = tail.replace(/((?:\\\\{2}){0,64})(\\\\?)\\|/g, function (_, $1, $2) {\n      if (!$2) {\n        // the | isn't already escaped, so escape it.\n        $2 = '\\\\'\n      }\n\n      // need to escape all those slashes *again*, without escaping the\n      // one that we need for escaping the | character.  As it works out,\n      // escaping an even number of slashes can be done by simply repeating\n      // it exactly after itself.  That's why this trick works.\n      //\n      // I am sorry that you have to see this.\n      return $1 + $1 + $2 + '|'\n    })\n\n    this.debug('tail=%j\\n   %s', tail, tail, pl, re)\n    var t = pl.type === '*' ? star\n      : pl.type === '?' ? qmark\n      : '\\\\' + pl.type\n\n    hasMagic = true\n    re = re.slice(0, pl.reStart) + t + '\\\\(' + tail\n  }\n\n  // handle trailing things that only matter at the very end.\n  clearStateChar()\n  if (escaping) {\n    // trailing \\\\\n    re += '\\\\\\\\'\n  }\n\n  // only need to apply the nodot start if the re starts with\n  // something that could conceivably capture a dot\n  var addPatternStart = false\n  switch (re.charAt(0)) {\n    case '.':\n    case '[':\n    case '(': addPatternStart = true\n  }\n\n  // Hack to work around lack of negative lookbehind in JS\n  // A pattern like: *.!(x).!(y|z) needs to ensure that a name\n  // like 'a.xyz.yz' doesn't match.  So, the first negative\n  // lookahead, has to look ALL the way ahead, to the end of\n  // the pattern.\n  for (var n = negativeLists.length - 1; n > -1; n--) {\n    var nl = negativeLists[n]\n\n    var nlBefore = re.slice(0, nl.reStart)\n    var nlFirst = re.slice(nl.reStart, nl.reEnd - 8)\n    var nlLast = re.slice(nl.reEnd - 8, nl.reEnd)\n    var nlAfter = re.slice(nl.reEnd)\n\n    nlLast += nlAfter\n\n    // Handle nested stuff like *(*.js|!(*.json)), where open parens\n    // mean that we should *not* include the ) in the bit that is considered\n    // \"after\" the negated section.\n    var openParensBefore = nlBefore.split('(').length - 1\n    var cleanAfter = nlAfter\n    for (i = 0; i < openParensBefore; i++) {\n      cleanAfter = cleanAfter.replace(/\\)[+*?]?/, '')\n    }\n    nlAfter = cleanAfter\n\n    var dollar = ''\n    if (nlAfter === '' && isSub !== SUBPARSE) {\n      dollar = '$'\n    }\n    var newRe = nlBefore + nlFirst + nlAfter + dollar + nlLast\n    re = newRe\n  }\n\n  // if the re is not \"\" at this point, then we need to make sure\n  // it doesn't match against an empty path part.\n  // Otherwise a/* will match a/, which it should not.\n  if (re !== '' && hasMagic) {\n    re = '(?=.)' + re\n  }\n\n  if (addPatternStart) {\n    re = patternStart + re\n  }\n\n  // parsing just a piece of a larger pattern.\n  if (isSub === SUBPARSE) {\n    return [re, hasMagic]\n  }\n\n  // skip the regexp for non-magical patterns\n  // unescape anything in it, though, so that it'll be\n  // an exact match against a file etc.\n  if (!hasMagic) {\n    return globUnescape(pattern)\n  }\n\n  var flags = options.nocase ? 'i' : ''\n  try {\n    var regExp = new RegExp('^' + re + '$', flags)\n  } catch (er) {\n    // If it was an invalid regular expression, then it can't match\n    // anything.  This trick looks for a character after the end of\n    // the string, which is of course impossible, except in multi-line\n    // mode, but it's not a /m regex.\n    return new RegExp('$.')\n  }\n\n  regExp._glob = pattern\n  regExp._src = re\n\n  return regExp\n}\n\nminimatch.makeRe = function (pattern, options) {\n  return new Minimatch(pattern, options || {}).makeRe()\n}\n\nMinimatch.prototype.makeRe = makeRe\nfunction makeRe () {\n  if (this.regexp || this.regexp === false) return this.regexp\n\n  // at this point, this.set is a 2d array of partial\n  // pattern strings, or \"**\".\n  //\n  // It's better to use .match().  This function shouldn't\n  // be used, really, but it's pretty convenient sometimes,\n  // when you just want to work with a regex.\n  var set = this.set\n\n  if (!set.length) {\n    this.regexp = false\n    return this.regexp\n  }\n  var options = this.options\n\n  var twoStar = options.noglobstar ? star\n    : options.dot ? twoStarDot\n    : twoStarNoDot\n  var flags = options.nocase ? 'i' : ''\n\n  var re = set.map(function (pattern) {\n    return pattern.map(function (p) {\n      return (p === GLOBSTAR) ? twoStar\n      : (typeof p === 'string') ? regExpEscape(p)\n      : p._src\n    }).join('\\\\\\/')\n  }).join('|')\n\n  // must match entire pattern\n  // ending in a * or ** will make it less strict.\n  re = '^(?:' + re + ')$'\n\n  // can match anything, as long as it's not this.\n  if (this.negate) re = '^(?!' + re + ').*$'\n\n  try {\n    this.regexp = new RegExp(re, flags)\n  } catch (ex) {\n    this.regexp = false\n  }\n  return this.regexp\n}\n\nminimatch.match = function (list, pattern, options) {\n  options = options || {}\n  var mm = new Minimatch(pattern, options)\n  list = list.filter(function (f) {\n    return mm.match(f)\n  })\n  if (mm.options.nonull && !list.length) {\n    list.push(pattern)\n  }\n  return list\n}\n\nMinimatch.prototype.match = match\nfunction match (f, partial) {\n  this.debug('match', f, this.pattern)\n  // short-circuit in the case of busted things.\n  // comments, etc.\n  if (this.comment) return false\n  if (this.empty) return f === ''\n\n  if (f === '/' && partial) return true\n\n  var options = this.options\n\n  // windows: need to use /, not \\\n  if (path.sep !== '/') {\n    f = f.split(path.sep).join('/')\n  }\n\n  // treat the test path as a set of pathparts.\n  f = f.split(slashSplit)\n  this.debug(this.pattern, 'split', f)\n\n  // just ONE of the pattern sets in this.set needs to match\n  // in order for it to be valid.  If negating, then just one\n  // match means that we have failed.\n  // Either way, return on the first hit.\n\n  var set = this.set\n  this.debug(this.pattern, 'set', set)\n\n  // Find the basename of the path by looking for the last non-empty segment\n  var filename\n  var i\n  for (i = f.length - 1; i >= 0; i--) {\n    filename = f[i]\n    if (filename) break\n  }\n\n  for (i = 0; i < set.length; i++) {\n    var pattern = set[i]\n    var file = f\n    if (options.matchBase && pattern.length === 1) {\n      file = [filename]\n    }\n    var hit = this.matchOne(file, pattern, partial)\n    if (hit) {\n      if (options.flipNegate) return true\n      return !this.negate\n    }\n  }\n\n  // didn't get any hits.  this is success if it's a negative\n  // pattern, failure otherwise.\n  if (options.flipNegate) return false\n  return this.negate\n}\n\n// set partial to true to test if, for example,\n// \"/a/b\" matches the start of \"/*/b/*/d\"\n// Partial means, if you run out of file before you run\n// out of pattern, then that's fine, as long as all\n// the parts match.\nMinimatch.prototype.matchOne = function (file, pattern, partial) {\n  var options = this.options\n\n  this.debug('matchOne',\n    { 'this': this, file: file, pattern: pattern })\n\n  this.debug('matchOne', file.length, pattern.length)\n\n  for (var fi = 0,\n      pi = 0,\n      fl = file.length,\n      pl = pattern.length\n      ; (fi < fl) && (pi < pl)\n      ; fi++, pi++) {\n    this.debug('matchOne loop')\n    var p = pattern[pi]\n    var f = file[fi]\n\n    this.debug(pattern, p, f)\n\n    // should be impossible.\n    // some invalid regexp stuff in the set.\n    if (p === false) return false\n\n    if (p === GLOBSTAR) {\n      this.debug('GLOBSTAR', [pattern, p, f])\n\n      // \"**\"\n      // a/**/b/**/c would match the following:\n      // a/b/x/y/z/c\n      // a/x/y/z/b/c\n      // a/b/x/b/x/c\n      // a/b/c\n      // To do this, take the rest of the pattern after\n      // the **, and see if it would match the file remainder.\n      // If so, return success.\n      // If not, the ** \"swallows\" a segment, and try again.\n      // This is recursively awful.\n      //\n      // a/**/b/**/c matching a/b/x/y/z/c\n      // - a matches a\n      // - doublestar\n      //   - matchOne(b/x/y/z/c, b/**/c)\n      //     - b matches b\n      //     - doublestar\n      //       - matchOne(x/y/z/c, c) -> no\n      //       - matchOne(y/z/c, c) -> no\n      //       - matchOne(z/c, c) -> no\n      //       - matchOne(c, c) yes, hit\n      var fr = fi\n      var pr = pi + 1\n      if (pr === pl) {\n        this.debug('** at the end')\n        // a ** at the end will just swallow the rest.\n        // We have found a match.\n        // however, it will not swallow /.x, unless\n        // options.dot is set.\n        // . and .. are *never* matched by **, for explosively\n        // exponential reasons.\n        for (; fi < fl; fi++) {\n          if (file[fi] === '.' || file[fi] === '..' ||\n            (!options.dot && file[fi].charAt(0) === '.')) return false\n        }\n        return true\n      }\n\n      // ok, let's see if we can swallow whatever we can.\n      while (fr < fl) {\n        var swallowee = file[fr]\n\n        this.debug('\\nglobstar while', file, fr, pattern, pr, swallowee)\n\n        // XXX remove this slice.  Just pass the start index.\n        if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {\n          this.debug('globstar found match!', fr, fl, swallowee)\n          // found a match.\n          return true\n        } else {\n          // can't swallow \".\" or \"..\" ever.\n          // can only swallow \".foo\" when explicitly asked.\n          if (swallowee === '.' || swallowee === '..' ||\n            (!options.dot && swallowee.charAt(0) === '.')) {\n            this.debug('dot detected!', file, fr, pattern, pr)\n            break\n          }\n\n          // ** swallows a segment, and continue.\n          this.debug('globstar swallow a segment, and continue')\n          fr++\n        }\n      }\n\n      // no match was found.\n      // However, in partial mode, we can't say this is necessarily over.\n      // If there's more *pattern* left, then\n      if (partial) {\n        // ran out of file\n        this.debug('\\n>>> no match, partial?', file, fr, pattern, pr)\n        if (fr === fl) return true\n      }\n      return false\n    }\n\n    // something other than **\n    // non-magic patterns just have to match exactly\n    // patterns with magic have been turned into regexps.\n    var hit\n    if (typeof p === 'string') {\n      if (options.nocase) {\n        hit = f.toLowerCase() === p.toLowerCase()\n      } else {\n        hit = f === p\n      }\n      this.debug('string match', p, f, hit)\n    } else {\n      hit = f.match(p)\n      this.debug('pattern match', p, f, hit)\n    }\n\n    if (!hit) return false\n  }\n\n  // Note: ending in / means that we'll get a final \"\"\n  // at the end of the pattern.  This can only match a\n  // corresponding \"\" at the end of the file.\n  // If the file ends in /, then it can only match a\n  // a pattern that ends in /, unless the pattern just\n  // doesn't have any more for it. But, a/b/ should *not*\n  // match \"a/b/*\", even though \"\" matches against the\n  // [^/]*? pattern, except in partial mode, where it might\n  // simply not be reached yet.\n  // However, a/b/ should still satisfy a/*\n\n  // now either we fell off the end of the pattern, or we're done.\n  if (fi === fl && pi === pl) {\n    // ran out of pattern and filename at the same time.\n    // an exact hit!\n    return true\n  } else if (fi === fl) {\n    // ran out of file, but still had pattern left.\n    // this is ok if we're doing the match as part of\n    // a glob fs traversal.\n    return partial\n  } else if (pi === pl) {\n    // ran out of pattern, still have file left.\n    // this is only acceptable if we're on the very last\n    // empty segment of a file with a trailing slash.\n    // a/* should match a/b/\n    var emptyFileEnd = (fi === fl - 1) && (file[fi] === '')\n    return emptyFileEnd\n  }\n\n  // should be unreachable.\n  throw new Error('wtf?')\n}\n\n// replace stuff like \\* with *\nfunction globUnescape (s) {\n  return s.replace(/\\\\(.)/g, '$1')\n}\n\nfunction regExpEscape (s) {\n  return s.replace(/[-[\\]{}()*+?.,\\\\^$|#\\s]/g, '\\\\$&')\n}\n","var Path = require('../path.js');\nvar Errors = require('../errors.js');\nvar Environment = require('./environment.js');\nvar async = require('../../lib/async.js');\nvar Encoding = require('../encoding.js');\nvar minimatch = require('minimatch');\n\nfunction Shell(fs, options) {\n  options = options || {};\n\n  var env = new Environment(options.env);\n  var cwd = '/';\n\n  /**\n   * The bound FileSystem (cannot be changed)\n   */\n  Object.defineProperty(this, 'fs', {\n    get: function() { return fs; },\n    enumerable: true\n  });\n\n  /**\n   * The shell's environment (e.g., for things like\n   * path, tmp, and other env vars). Use env.get()\n   * and env.set() to work with variables.\n   */\n  Object.defineProperty(this, 'env', {\n    get: function() { return env; },\n    enumerable: true\n  });\n\n  /**\n   * Change the current working directory. We\n   * include `cd` on the `this` vs. proto so that\n   * we can access cwd without exposing it externally.\n   */\n  this.cd = function(path, callback) {\n    path = Path.resolve(cwd, path);\n    // Make sure the path actually exists, and is a dir\n    fs.stat(path, function(err, stats) {\n      if(err) {\n        callback(new Errors.ENOTDIR(null, path));\n        return;\n      }\n      if(stats.type === 'DIRECTORY') {\n        cwd = path;\n        callback();\n      } else {\n        callback(new Errors.ENOTDIR(null, path));\n      }\n    });\n  };\n\n  /**\n   * Get the current working directory (changed with `cd()`)\n   */\n  this.pwd = function() {\n    return cwd;\n  };\n}\n\n/**\n * Execute the .js command located at `path`. Such commands\n * should assume the existence of 3 arguments, which will be\n * defined at runtime:\n *\n *   * fs - the current shell's bound filesystem object\n *   * args - a list of arguments for the command, or an empty list if none\n *   * callback - a callback function(error, result) to call when done.\n *\n * The .js command's contents should be the body of a function\n * that looks like this:\n *\n * function(fs, args, callback) {\n *   // .js code here\n * }\n */\nShell.prototype.exec = function(path, args, callback) {\n  /* jshint evil:true */\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof args === 'function') {\n    callback = args;\n    args = [];\n  }\n  args = args || [];\n  callback = callback || function(){};\n  path = Path.resolve(sh.pwd(), path);\n\n  fs.readFile(path, \"utf8\", function(error, data) {\n    if(error) {\n      callback(error);\n      return;\n    }\n    try {\n      var cmd = new Function('fs', 'args', 'callback', data);\n      cmd(fs, args, callback);\n    } catch(e) {\n      callback(e);\n    }\n  });\n};\n\n/**\n * Create a file if it does not exist, or update access and\n * modified times if it does. Valid options include:\n *\n *  * updateOnly - whether to create the file if missing (defaults to false)\n *  * date - use the provided Date value instead of current date/time\n */\nShell.prototype.touch = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n  path = Path.resolve(sh.pwd(), path);\n\n  function createFile(path) {\n    fs.writeFile(path, '', callback);\n  }\n\n  function updateTimes(path) {\n    var now = Date.now();\n    var atime = options.date || now;\n    var mtime = options.date || now;\n\n    fs.utimes(path, atime, mtime, callback);\n  }\n\n  fs.stat(path, function(error, stats) {\n    if(error) {\n      if(options.updateOnly === true) {\n        callback();\n      } else {\n        createFile(path);\n      }\n    } else {\n      updateTimes(path);\n    }\n  });\n};\n\n/**\n * Concatenate multiple files into a single String, with each\n * file separated by a newline. The `files` argument should\n * be a String (path to single file) or an Array of Strings\n * (multiple file paths).\n */\nShell.prototype.cat = function(files, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  var all = '';\n  callback = callback || function(){};\n\n  if(!files) {\n    callback(new Errors.EINVAL('Missing files argument'));\n    return;\n  }\n\n  files = typeof files === 'string' ? [ files ] : files;\n\n  function append(item, callback) {\n    var filename = Path.resolve(sh.pwd(), item);\n    fs.readFile(filename, 'utf8', function(error, data) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      all += data + '\\n';\n      callback();\n    });\n  }\n\n  async.eachSeries(files, append, function(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, all.replace(/\\n$/, ''));\n    }\n  });\n};\n\n/**\n * Get the listing of a directory, returning an array of\n * file entries in the following form:\n *\n * {\n *   path: <String> the basename of the directory entry\n *   links: <Number> the number of links to the entry\n *   size: <Number> the size in bytes of the entry\n *   modified: <Number> the last modified date/time\n *   type: <String> the type of the entry\n *   contents: <Array> an optional array of child entries\n * }\n *\n * By default ls() gives a shallow listing. If you want\n * to follow directories as they are encountered, use\n * the `recursive=true` option.\n */\nShell.prototype.ls = function(dir, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  if(!dir) {\n    callback(new Errors.EINVAL('Missing dir argument'));\n    return;\n  }\n\n  function list(path, callback) {\n    var pathname = Path.resolve(sh.pwd(), path);\n    var result = [];\n\n    fs.readdir(pathname, function(error, entries) {\n      if(error) {\n        callback(error);\n        return;\n      }\n\n      function getDirEntry(name, callback) {\n        name = Path.join(pathname, name);\n        fs.stat(name, function(error, stats) {\n          if(error) {\n            callback(error);\n            return;\n          }\n          var entry = {\n            path: Path.basename(name),\n            links: stats.nlinks,\n            size: stats.size,\n            modified: stats.mtime,\n            type: stats.type\n          };\n\n          if(options.recursive && stats.type === 'DIRECTORY') {\n            list(Path.join(pathname, entry.path), function(error, items) {\n              if(error) {\n                callback(error);\n                return;\n              }\n              entry.contents = items;\n              result.push(entry);\n              callback();\n            });\n          } else {\n            result.push(entry);\n            callback();\n          }\n        });\n      }\n\n      async.eachSeries(entries, getDirEntry, function(error) {\n        callback(error, result);\n      });\n    });\n  }\n\n  list(dir, callback);\n};\n\n/**\n * Removes the file or directory at `path`. If `path` is a file\n * it will be removed. If `path` is a directory, it will be\n * removed if it is empty, otherwise the callback will receive\n * an error. In order to remove non-empty directories, use the\n * `recursive=true` option.\n */\nShell.prototype.rm = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n\n  function remove(pathname, callback) {\n    pathname = Path.resolve(sh.pwd(), pathname);\n    fs.stat(pathname, function(error, stats) {\n      if(error) {\n        callback(error);\n        return;\n      }\n\n      // If this is a file, delete it and we're done\n      if(stats.type === 'FILE') {\n        fs.unlink(pathname, callback);\n        return;\n      }\n\n      // If it's a dir, check if it's empty\n      fs.readdir(pathname, function(error, entries) {\n        if(error) {\n          callback(error);\n          return;\n        }\n\n        // If dir is empty, delete it and we're done\n        if(entries.length === 0) {\n          fs.rmdir(pathname, callback);\n          return;\n        }\n\n        // If not, see if we're allowed to delete recursively\n        if(!options.recursive) {\n          callback(new Errors.ENOTEMPTY(null, pathname));\n          return;\n        }\n\n        // Remove each dir entry recursively, then delete the dir.\n        entries = entries.map(function(filename) {\n          // Root dir entries absolutely\n          return Path.join(pathname, filename);\n        });\n        async.eachSeries(entries, remove, function(error) {\n          if(error) {\n            callback(error);\n            return;\n          }\n          fs.rmdir(pathname, callback);\n        });\n      });\n    });\n  }\n\n  remove(path, callback);\n};\n\n/**\n * Gets the path to the temporary directory, creating it if not\n * present. The directory used is the one specified in\n * env.TMP. The callback receives (error, tempDirName).\n */\nShell.prototype.tempDir = function(callback) {\n  var sh = this;\n  var fs = sh.fs;\n  var tmp = sh.env.get('TMP');\n  callback = callback || function(){};\n\n  // Try and create it, and it will either work or fail\n  // but either way it's now there.\n  fs.mkdir(tmp, function(err) {\n    callback(null, tmp);\n  });\n};\n\n/**\n * Recursively creates the directory at `path`. If the parent\n * of `path` does not exist, it will be created.\n * Based off EnsureDir by Sam X. Xu\n * https://www.npmjs.org/package/ensureDir\n * MIT License\n */\nShell.prototype.mkdirp = function(path, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  callback = callback || function(){};\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n  else if (path === '/') {\n    callback();\n    return;\n  }\n  function _mkdirp(path, callback) {\n    fs.stat(path, function (err, stat) {\n      if(stat) {\n        if(stat.isDirectory()) {\n          callback();\n          return;\n        }\n        else if (stat.isFile()) {\n          callback(new Errors.ENOTDIR(null, path));\n          return;\n        }\n      }\n      else if (err && err.code !== 'ENOENT') {\n        callback(err);\n        return;\n      }\n      else {\n        var parent = Path.dirname(path);\n        if(parent === '/') {\n          fs.mkdir(path, function (err) {\n            if (err && err.code != 'EEXIST') {\n              callback(err);\n              return;\n            }\n            callback();\n            return;\n          });\n        }\n        else {\n          _mkdirp(parent, function (err) {\n            if (err) return callback(err);\n            fs.mkdir(path, function (err) {\n              if (err && err.code != 'EEXIST') {\n                callback(err);\n                return;\n              }\n              callback();\n              return;\n            });\n          });\n        }\n      }\n    });\n  }\n\n  _mkdirp(path, callback);\n};\n\n/**\n * Recursively walk a directory tree, reporting back all paths\n * that were found along the way. The `path` must be a dir.\n * Valid options include a `regex` for pattern matching paths\n * and an `exec` function of the form `function(path, next)` where\n * `path` is the current path that was found (dir paths have an '/'\n * appended) and `next` is a callback to call when done processing\n * the current path, passing any error object back as the first argument.\n * `find` returns a flat array of absolute paths for all matching/found\n * paths as the final argument to the callback.\n */\n Shell.prototype.find = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  var exec = options.exec || function(path, next) { next(); };\n  var found = [];\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n\n  function processPath(path, callback) {\n    exec(path, function(err) {\n      if(err) {\n        callback(err);\n        return;\n      }\n\n      found.push(path);\n      callback();\n    });\n  }\n\n  function maybeProcessPath(path, callback) {\n    // Test the path against the user's regex, name, path primaries (if any)\n    // and remove any trailing slashes added previously.\n    var rawPath = Path.removeTrailing(path);\n\n    // Check entire path against provided regex, if any\n    if(options.regex && !options.regex.test(rawPath)) {\n      callback();\n      return;\n    }\n\n    // Check basename for matches against name primary, if any\n    if(options.name && !minimatch(Path.basename(rawPath), options.name)) {\n      callback();\n      return;\n    }\n\n    // Check dirname for matches against path primary, if any\n    if(options.path && !minimatch(Path.dirname(rawPath), options.path)) {\n      callback();\n      return;\n    }\n\n    processPath(path, callback);\n  }\n\n  function walk(path, callback) {\n    path = Path.resolve(sh.pwd(), path);\n\n    // The path is either a file or dir, and instead of doing\n    // a stat() to determine it first, we just try to readdir()\n    // and it will either work or not, and we handle the non-dir error.\n    fs.readdir(path, function(err, entries) {\n      if(err) {\n        if(err.code === 'ENOTDIR' /* file case, ignore error */) {\n          maybeProcessPath(path, callback);\n        } else {\n          callback(err);\n        }\n        return;\n      }\n\n      // Path is really a dir, add a trailing / and report it found\n      maybeProcessPath(Path.addTrailing(path), function(err) {\n        if(err) {\n          callback(err);\n          return;\n        }\n\n        entries = entries.map(function(entry) {\n          return Path.join(path, entry);\n        });\n\n        async.eachSeries(entries, walk, function(err) {\n          callback(err, found);\n        });\n      });\n    });\n  }\n\n  // Make sure we are starting with a dir path\n  fs.stat(path, function(err, stats) {\n    if(err) {\n      callback(err);\n      return;\n    }\n    if(!stats.isDirectory()) {\n      callback(new Errors.ENOTDIR(null, path));\n      return;\n    }\n\n    walk(path, callback);\n  });\n};\n\nmodule.exports = Shell;\n","// Based on https://github.com/diy/intercom.js/blob/master/lib/events.js\n// Copyright 2012 DIY Co Apache License, Version 2.0\n// http://www.apache.org/licenses/LICENSE-2.0\n\nfunction removeItem(item, array) {\n  for (var i = array.length - 1; i >= 0; i--) {\n    if (array[i] === item) {\n      array.splice(i, 1);\n    }\n  }\n  return array;\n}\n\nvar EventEmitter = function() {};\n\nEventEmitter.createInterface = function(space) {\n  var methods = {};\n\n  methods.on = function(name, fn) {\n    if (typeof this[space] === 'undefined') {\n      this[space] = {};\n    }\n    if (!this[space].hasOwnProperty(name)) {\n      this[space][name] = [];\n    }\n    this[space][name].push(fn);\n  };\n\n  methods.off = function(name, fn) {\n    if (typeof this[space] === 'undefined') return;\n    if (this[space].hasOwnProperty(name)) {\n      removeItem(fn, this[space][name]);\n    }\n  };\n\n  methods.trigger = function(name) {\n    if (typeof this[space] !== 'undefined' && this[space].hasOwnProperty(name)) {\n      var args = Array.prototype.slice.call(arguments, 1);\n      for (var i = 0; i < this[space][name].length; i++) {\n        this[space][name][i].apply(this[space][name][i], args);\n      }\n    }\n  };\n\n  methods.removeAllListeners = function(name) {\n    if (typeof this[space] === 'undefined') return;\n    var self = this;\n    self[space][name].forEach(function(fn) {\n      self.off(name, fn);\n    });\n  };\n\n  return methods;\n};\n\nvar pvt = EventEmitter.createInterface('_handlers');\nEventEmitter.prototype._on = pvt.on;\nEventEmitter.prototype._off = pvt.off;\nEventEmitter.prototype._trigger = pvt.trigger;\n\nvar pub = EventEmitter.createInterface('handlers');\nEventEmitter.prototype.on = function() {\n  pub.on.apply(this, arguments);\n  Array.prototype.unshift.call(arguments, 'on');\n  this._trigger.apply(this, arguments);\n};\nEventEmitter.prototype.off = pub.off;\nEventEmitter.prototype.trigger = pub.trigger;\nEventEmitter.prototype.removeAllListeners = pub.removeAllListeners;\n\nmodule.exports = EventEmitter;\n","// Based on https://github.com/diy/intercom.js/blob/master/lib/intercom.js\n// Copyright 2012 DIY Co Apache License, Version 2.0\n// http://www.apache.org/licenses/LICENSE-2.0\n\nvar EventEmitter = require('./eventemitter.js');\nvar guid = require('../src/shared.js').guid;\n\nfunction throttle(delay, fn) {\n  var last = 0;\n  return function() {\n    var now = Date.now();\n    if (now - last > delay) {\n      last = now;\n      fn.apply(this, arguments);\n    }\n  };\n}\n\nfunction extend(a, b) {\n  if (typeof a === 'undefined' || !a) { a = {}; }\n  if (typeof b === 'object') {\n    for (var key in b) {\n      if (b.hasOwnProperty(key)) {\n        a[key] = b[key];\n      }\n    }\n  }\n  return a;\n}\n\nvar localStorage = (function(window) {\n  if (typeof window === 'undefined' ||\n      typeof window.localStorage === 'undefined') {\n    return {\n      getItem : function() {},\n      setItem : function() {},\n      removeItem : function() {}\n    };\n  }\n  return window.localStorage;\n}(global));\n\nfunction Intercom() {\n  var self = this;\n  var now = Date.now();\n\n  this.origin         = guid();\n  this.lastMessage    = now;\n  this.receivedIDs    = {};\n  this.previousValues = {};\n\n  var storageHandler = function() {\n    self._onStorageEvent.apply(self, arguments);\n  };\n\n  // If we're in node.js, skip event registration\n  if (typeof document === 'undefined') {\n    return;\n  }\n\n  if (document.attachEvent) {\n    document.attachEvent('onstorage', storageHandler);\n  } else {\n    global.addEventListener('storage', storageHandler, false);\n  }\n}\n\nIntercom.prototype._transaction = function(fn) {\n  var TIMEOUT   = 1000;\n  var WAIT      = 20;\n  var self      = this;\n  var executed  = false;\n  var listening = false;\n  var waitTimer = null;\n\n  function lock() {\n    if (executed) {\n      return;\n    }\n\n    var now = Date.now();\n    var activeLock = localStorage.getItem(INDEX_LOCK)|0;\n    if (activeLock && now - activeLock < TIMEOUT) {\n      if (!listening) {\n        self._on('storage', lock);\n        listening = true;\n      }\n      waitTimer = setTimeout(lock, WAIT);\n      return;\n    }\n    executed = true;\n    localStorage.setItem(INDEX_LOCK, now);\n\n    fn();\n    unlock();\n  }\n\n  function unlock() {\n    if (listening) {\n      self._off('storage', lock);\n    }\n    if (waitTimer) {\n      clearTimeout(waitTimer);\n    }\n    localStorage.removeItem(INDEX_LOCK);\n  }\n\n  lock();\n};\n\nIntercom.prototype._cleanup_emit = throttle(100, function() {\n  var self = this;\n\n  self._transaction(function() {\n    var now = Date.now();\n    var threshold = now - THRESHOLD_TTL_EMIT;\n    var changed = 0;\n    var messages;\n\n    try {\n      messages = JSON.parse(localStorage.getItem(INDEX_EMIT) || '[]');\n    } catch(e) {\n      messages = [];\n    }\n    for (var i = messages.length - 1; i >= 0; i--) {\n      if (messages[i].timestamp < threshold) {\n        messages.splice(i, 1);\n        changed++;\n      }\n    }\n    if (changed > 0) {\n      localStorage.setItem(INDEX_EMIT, JSON.stringify(messages));\n    }\n  });\n});\n\nIntercom.prototype._cleanup_once = throttle(100, function() {\n  var self = this;\n\n  self._transaction(function() {\n    var timestamp, ttl, key;\n    var table;\n    var now  = Date.now();\n    var changed = 0;\n\n    try {\n      table = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');\n    } catch(e) {\n      table = {};\n    }\n    for (key in table) {\n      if (self._once_expired(key, table)) {\n        delete table[key];\n        changed++;\n      }\n    }\n\n    if (changed > 0) {\n      localStorage.setItem(INDEX_ONCE, JSON.stringify(table));\n    }\n  });\n});\n\nIntercom.prototype._once_expired = function(key, table) {\n  if (!table) {\n    return true;\n  }\n  if (!table.hasOwnProperty(key)) {\n    return true;\n  }\n  if (typeof table[key] !== 'object') {\n    return true;\n  }\n\n  var ttl = table[key].ttl || THRESHOLD_TTL_ONCE;\n  var now = Date.now();\n  var timestamp = table[key].timestamp;\n  return timestamp < now - ttl;\n};\n\nIntercom.prototype._localStorageChanged = function(event, field) {\n  if (event && event.key) {\n    return event.key === field;\n  }\n\n  var currentValue = localStorage.getItem(field);\n  if (currentValue === this.previousValues[field]) {\n    return false;\n  }\n  this.previousValues[field] = currentValue;\n  return true;\n};\n\nIntercom.prototype._onStorageEvent = function(event) {\n  event = event || global.event;\n  var self = this;\n\n  if (this._localStorageChanged(event, INDEX_EMIT)) {\n    this._transaction(function() {\n      var now = Date.now();\n      var data = localStorage.getItem(INDEX_EMIT);\n      var messages;\n\n      try {\n        messages = JSON.parse(data || '[]');\n      } catch(e) {\n        messages = [];\n      }\n      for (var i = 0; i < messages.length; i++) {\n        if (messages[i].origin === self.origin) continue;\n        if (messages[i].timestamp < self.lastMessage) continue;\n        if (messages[i].id) {\n          if (self.receivedIDs.hasOwnProperty(messages[i].id)) continue;\n          self.receivedIDs[messages[i].id] = true;\n        }\n        self.trigger(messages[i].name, messages[i].payload);\n      }\n      self.lastMessage = now;\n    });\n  }\n\n  this._trigger('storage', event);\n};\n\nIntercom.prototype._emit = function(name, message, id) {\n  id = (typeof id === 'string' || typeof id === 'number') ? String(id) : null;\n  if (id && id.length) {\n    if (this.receivedIDs.hasOwnProperty(id)) return;\n    this.receivedIDs[id] = true;\n  }\n\n  var packet = {\n    id        : id,\n    name      : name,\n    origin    : this.origin,\n    timestamp : Date.now(),\n    payload   : message\n  };\n\n  var self = this;\n  this._transaction(function() {\n    var data = localStorage.getItem(INDEX_EMIT) || '[]';\n    var delimiter = (data === '[]') ? '' : ',';\n    data = [data.substring(0, data.length - 1), delimiter, JSON.stringify(packet), ']'].join('');\n    localStorage.setItem(INDEX_EMIT, data);\n    self.trigger(name, message);\n\n    setTimeout(function() {\n      self._cleanup_emit();\n    }, 50);\n  });\n};\n\nIntercom.prototype.emit = function(name, message) {\n  this._emit.apply(this, arguments);\n  this._trigger('emit', name, message);\n};\n\nIntercom.prototype.once = function(key, fn, ttl) {\n  if (!Intercom.supported) {\n    return;\n  }\n\n  var self = this;\n  this._transaction(function() {\n    var data;\n    try {\n      data = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');\n    } catch(e) {\n      data = {};\n    }\n    if (!self._once_expired(key, data)) {\n      return;\n    }\n\n    data[key] = {};\n    data[key].timestamp = Date.now();\n    if (typeof ttl === 'number') {\n      data[key].ttl = ttl * 1000;\n    }\n\n    localStorage.setItem(INDEX_ONCE, JSON.stringify(data));\n    fn();\n\n    setTimeout(function() {\n      self._cleanup_once();\n    }, 50);\n  });\n};\n\nextend(Intercom.prototype, EventEmitter.prototype);\n\nIntercom.supported = (typeof localStorage !== 'undefined');\n\nvar INDEX_EMIT = 'intercom';\nvar INDEX_ONCE = 'intercom_once';\nvar INDEX_LOCK = 'intercom_lock';\n\nvar THRESHOLD_TTL_EMIT = 50000;\nvar THRESHOLD_TTL_ONCE = 1000 * 3600;\n\nIntercom.destroy = function() {\n  localStorage.removeItem(INDEX_LOCK);\n  localStorage.removeItem(INDEX_EMIT);\n  localStorage.removeItem(INDEX_ONCE);\n};\n\nIntercom.getInstance = (function() {\n  var intercom;\n  return function() {\n    if (!intercom) {\n      intercom = new Intercom();\n    }\n    return intercom;\n  };\n})();\n\nmodule.exports = Intercom;\n","var EventEmitter = require('../lib/eventemitter.js');\nvar Path = require('./path.js');\nvar Intercom = require('../lib/intercom.js');\n\n/**\n * FSWatcher based on node.js' FSWatcher\n * see https://github.com/joyent/node/blob/master/lib/fs.js\n */\nfunction FSWatcher() {\n  EventEmitter.call(this);\n  var self = this;\n  var recursive = false;\n  var recursivePathPrefix;\n  var filename;\n\n  function onchange(path) {\n    // Watch for exact filename, or parent path when recursive is true.\n    if(filename === path || (recursive && path.indexOf(recursivePathPrefix) === 0)) {\n      self.trigger('change', 'change', path);\n    }\n  }\n\n  // We support, but ignore the second arg, which node.js uses.\n  self.start = function(filename_, persistent_, recursive_) {\n    // Bail if we've already started (and therefore have a filename);\n    if(filename) {\n      return;\n    }\n\n    if(Path.isNull(filename_)) {\n      throw new Error('Path must be a string without null bytes.');\n    }\n\n    // TODO: get realpath for symlinks on filename...\n\n    // Filer's Path.normalize strips trailing slashes, which we use here.\n    // See https://github.com/js-platform/filer/issues/105\n    filename = Path.normalize(filename_);\n\n    // Whether to watch beneath this path or not\n    recursive = recursive_ === true;\n    // If recursive, construct a path prefix portion for comparisons later\n    // (i.e., '/path' becomes '/path/' so we can search within a filename for the\n    // prefix). We also take care to allow for '/' on its own.\n    if(recursive) {\n      recursivePathPrefix = filename === '/' ? '/' : filename + '/';\n    }\n\n    var intercom = Intercom.getInstance();\n    intercom.on('change', onchange);\n  };\n\n  self.close = function() {\n    var intercom = Intercom.getInstance();\n    intercom.off('change', onchange);\n    self.removeAllListeners('change');\n  };\n}\nFSWatcher.prototype = new EventEmitter();\nFSWatcher.prototype.constructor = FSWatcher;\n\nmodule.exports = FSWatcher;\n","var MODE_FILE = require('./constants.js').MODE_FILE;\n\nmodule.exports = function DirectoryEntry(id, type) {\n  this.id = id;\n  this.type = type || MODE_FILE;\n};\n","var Errors = require('./errors.js');\n\nfunction OpenFileDescription(path, id, flags, position) {\n  this.path = path;\n  this.id = id;\n  this.flags = flags;\n  this.position = position;\n}\n\n// Tries to find the node associated with an ofd's `id`.\n// If not found, an error is returned on the callback.\nOpenFileDescription.prototype.getNode = function(context, callback) {\n  var id = this.id;\n  var path = this.path;\n\n  function check_if_node_exists(error, node) {\n    if(error) {\n      return callback(error);\n    }\n\n    if(!node) {\n      return callback(new Errors.EBADF('file descriptor refers to unknown node', path));\n    }\n\n    callback(null, node);\n  }\n\n  context.getObject(id, check_if_node_exists);\n};\n\nmodule.exports = OpenFileDescription;\n","var Constants = require('./constants.js');\n\nfunction SuperNode(options) {\n  var now = Date.now();\n\n  this.id = Constants.SUPER_NODE_ID;\n  this.mode = Constants.MODE_META;\n  this.atime = options.atime || now;\n  this.ctime = options.ctime || now;\n  this.mtime = options.mtime || now;\n  // root node id (randomly generated)\n  this.rnode = options.rnode;\n}\n\nSuperNode.create = function(options, callback) {\n  options.guid(function(err, rnode) {\n    if(err) {\n      callback(err);\n      return;\n    }\n    options.rnode = options.rnode || rnode;\n    callback(null, new SuperNode(options));\n  });\n};\n\nmodule.exports = SuperNode;\n","var MODE_FILE = require('./constants.js').MODE_FILE;\n\nfunction Node(options) {\n  var now = Date.now();\n\n  this.id = options.id;\n  this.mode = options.mode || MODE_FILE;  // node type (file, directory, etc)\n  this.size = options.size || 0; // size (bytes for files, entries for directories)\n  this.atime = options.atime || now; // access time (will mirror ctime after creation)\n  this.ctime = options.ctime || now; // creation/change time\n  this.mtime = options.mtime || now; // modified time\n  this.flags = options.flags || []; // file flags\n  this.xattrs = options.xattrs || {}; // extended attributes\n  this.nlinks = options.nlinks || 0; // links count\n  this.version = options.version || 0; // node version\n  this.blksize = undefined; // block size\n  this.nblocks = 1; // blocks count\n  this.data = options.data; // id for data object\n}\n\n// Make sure the options object has an id on property,\n// either from caller or one we generate using supplied guid fn.\nfunction ensureID(options, prop, callback) {\n  if(options[prop]) {\n    callback(null);\n  } else {\n    options.guid(function(err, id) {\n      options[prop] = id;\n      callback(err);\n    });\n  }\n}\n\nNode.create = function(options, callback) {\n  // We expect both options.id and options.data to be provided/generated.\n  ensureID(options, 'id', function(err) {\n    if(err) {\n      callback(err);\n      return;\n    }\n\n    ensureID(options, 'data', function(err) {\n      if(err) {\n        callback(err);\n        return;\n      }\n\n      callback(null, new Node(options));\n    });\n  });\n};\n\nmodule.exports = Node;\n","var Constants = require('./constants.js');\n\nfunction Stats(fileNode, devName) {\n  this.node = fileNode.id;\n  this.dev = devName;\n  this.size = fileNode.size;\n  this.nlinks = fileNode.nlinks;\n  this.atime = fileNode.atime;\n  this.mtime = fileNode.mtime;\n  this.ctime = fileNode.ctime;\n  this.type = fileNode.mode;\n}\n\nStats.prototype.isFile = function() {\n  return this.type === Constants.MODE_FILE;\n};\n\nStats.prototype.isDirectory = function() {\n  return this.type === Constants.MODE_DIRECTORY;\n};\n\nStats.prototype.isSymbolicLink = function() {\n  return this.type === Constants.MODE_SYMBOLIC_LINK;\n};\n\n// These will always be false in Filer.\nStats.prototype.isSocket          =\nStats.prototype.isFIFO            =\nStats.prototype.isCharacterDevice =\nStats.prototype.isBlockDevice     =\nfunction() {\n  return false;\n};\n\nmodule.exports = Stats;\n","var _ = require('../../lib/nodash.js');\n\nvar Path = require('../path.js');\nvar normalize = Path.normalize;\nvar dirname = Path.dirname;\nvar basename = Path.basename;\nvar isAbsolutePath = Path.isAbsolute;\nvar isNullPath = Path.isNull;\n\nvar Constants = require('../constants.js');\nvar MODE_FILE = Constants.MODE_FILE;\nvar MODE_DIRECTORY = Constants.MODE_DIRECTORY;\nvar MODE_SYMBOLIC_LINK = Constants.MODE_SYMBOLIC_LINK;\nvar MODE_META = Constants.MODE_META;\n\nvar ROOT_DIRECTORY_NAME = Constants.ROOT_DIRECTORY_NAME;\nvar SUPER_NODE_ID = Constants.SUPER_NODE_ID;\nvar SYMLOOP_MAX = Constants.SYMLOOP_MAX;\n\nvar O_READ = Constants.O_READ;\nvar O_WRITE = Constants.O_WRITE;\nvar O_CREATE = Constants.O_CREATE;\nvar O_EXCLUSIVE = Constants.O_EXCLUSIVE;\nvar O_TRUNCATE = Constants.O_TRUNCATE;\nvar O_APPEND = Constants.O_APPEND;\nvar O_FLAGS = Constants.O_FLAGS;\n\nvar XATTR_CREATE = Constants.XATTR_CREATE;\nvar XATTR_REPLACE = Constants.XATTR_REPLACE;\nvar FS_NOMTIME = Constants.FS_NOMTIME;\nvar FS_NOCTIME = Constants.FS_NOCTIME;\n\nvar Encoding = require('../encoding.js');\nvar Errors = require('../errors.js');\nvar DirectoryEntry = require('../directory-entry.js');\nvar OpenFileDescription = require('../open-file-description.js');\nvar SuperNode = require('../super-node.js');\nvar Node = require('../node.js');\nvar Stats = require('../stats.js');\nvar Buffer = require('../buffer.js');\n\n/**\n * Update node times. Only passed times are modified (undefined times are ignored)\n * and filesystem flags are examined in order to override update logic.\n */\nfunction update_node_times(context, path, node, times, callback) {\n  // Honour mount flags for how we update times\n  var flags = context.flags;\n  if(_(flags).contains(FS_NOCTIME)) {\n    delete times.ctime;\n  }\n  if(_(flags).contains(FS_NOMTIME)) {\n    delete times.mtime;\n  }\n\n  // Only do the update if required (i.e., times are still present)\n  var update = false;\n  if(times.ctime) {\n    node.ctime = times.ctime;\n    // We don't do atime tracking for perf reasons, but do mirror ctime\n    node.atime = times.ctime;\n    update = true;\n  }\n  if(times.atime) {\n    // The only time we explicitly pass atime is when utimes(), futimes() is called.\n    // Override ctime mirror here if so\n    node.atime = times.atime;\n    update = true;\n  }\n  if(times.mtime) {\n    node.mtime = times.mtime;\n    update = true;\n  }\n\n  function complete(error) {\n    // Queue this change so we can send watch events.\n    // Unlike node.js, we send the full path vs. basename/dirname only.\n    context.changes.push({ event: 'change', path: path });\n    callback(error);\n  }\n\n  if(update) {\n    context.putObject(node.id, node, complete);\n  } else {\n    complete();\n  }\n}\n\n/**\n * make_node()\n */\n// in: file or directory path\n// out: new node representing file/directory\nfunction make_node(context, path, mode, callback) {\n  if(mode !== MODE_DIRECTORY && mode !== MODE_FILE) {\n    return callback(new Errors.EINVAL('mode must be a directory or file', path));\n  }\n\n  path = normalize(path);\n\n  var name = basename(path);\n  var parentPath = dirname(path);\n  var parentNode;\n  var parentNodeData;\n  var node;\n\n  // Check if the parent node exists\n  function create_node_in_parent(error, parentDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(parentDirectoryNode.mode !== MODE_DIRECTORY) {\n      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));\n    } else {\n      parentNode = parentDirectoryNode;\n      find_node(context, path, check_if_node_exists);\n    }\n  }\n\n  // Check if the node to be created already exists\n  function check_if_node_exists(error, result) {\n    if(!error && result) {\n      callback(new Errors.EEXIST('path name already exists', path));\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      context.getObject(parentNode.data, create_node);\n    }\n  }\n\n  // Create the new node\n  function create_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentNodeData = result;\n      Node.create({guid: context.guid, mode: mode}, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        node = result;\n        node.nlinks += 1;\n        context.putObject(node.id, node, update_parent_node_data);\n      });\n    }\n  }\n\n  // Update parent node time\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, node, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  // Update the parent nodes data\n  function update_parent_node_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      parentNodeData[name] = new DirectoryEntry(node.id, mode);\n      context.putObject(parentNode.data, parentNodeData, update_time);\n    }\n  }\n\n  // Find the parent node\n  find_node(context, parentPath, create_node_in_parent);\n}\n\n/**\n * find_node\n */\n// in: file or directory path\n// out: node structure, or error\nfunction find_node(context, path, callback) {\n  path = normalize(path);\n  if(!path) {\n    return callback(new Errors.ENOENT('path is an empty string'));\n  }\n  var name = basename(path);\n  var parentPath = dirname(path);\n  var followedCount = 0;\n\n  function read_root_directory_node(error, superNode) {\n    if(error) {\n      callback(error);\n    } else if(!superNode || superNode.mode !== MODE_META || !superNode.rnode) {\n      callback(new Errors.EFILESYSTEMERROR());\n    } else {\n      context.getObject(superNode.rnode, check_root_directory_node);\n    }\n  }\n\n  function check_root_directory_node(error, rootDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(!rootDirectoryNode) {\n      callback(new Errors.ENOENT());\n    } else {\n      callback(null, rootDirectoryNode);\n    }\n  }\n\n  // in: parent directory node\n  // out: parent directory data\n  function read_parent_directory_data(error, parentDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(parentDirectoryNode.mode !== MODE_DIRECTORY || !parentDirectoryNode.data) {\n      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));\n    } else {\n      context.getObject(parentDirectoryNode.data, get_node_from_parent_directory_data);\n    }\n  }\n\n  // in: parent directory data\n  // out: searched node\n  function get_node_from_parent_directory_data(error, parentDirectoryData) {\n    if(error) {\n      callback(error);\n    } else {\n      if(!_(parentDirectoryData).has(name)) {\n        callback(new Errors.ENOENT(null, path));\n      } else {\n        var nodeId = parentDirectoryData[name].id;\n        context.getObject(nodeId, is_symbolic_link);\n      }\n    }\n  }\n\n  function is_symbolic_link(error, node) {\n    if(error) {\n      callback(error);\n    } else {\n      if(node.mode == MODE_SYMBOLIC_LINK) {\n        followedCount++;\n        if(followedCount > SYMLOOP_MAX){\n          callback(new Errors.ELOOP(null, path));\n        } else {\n          follow_symbolic_link(node.data);\n        }\n      } else {\n        callback(null, node);\n      }\n    }\n  }\n\n  function follow_symbolic_link(data) {\n    data = normalize(data);\n    parentPath = dirname(data);\n    name = basename(data);\n    if(ROOT_DIRECTORY_NAME == name) {\n      context.getObject(SUPER_NODE_ID, read_root_directory_node);\n    } else {\n      find_node(context, parentPath, read_parent_directory_data);\n    }\n  }\n\n  if(ROOT_DIRECTORY_NAME == name) {\n    context.getObject(SUPER_NODE_ID, read_root_directory_node);\n  } else {\n    find_node(context, parentPath, read_parent_directory_data);\n  }\n}\n\n\n/**\n * set extended attribute (refactor)\n */\nfunction set_extended_attribute (context, path, node, name, value, flag, callback) {\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      update_node_times(context, path, node, { ctime: Date.now() }, callback);\n    }\n  }\n\n  var xattrs = node.xattrs;\n\n  if (flag === XATTR_CREATE && xattrs.hasOwnProperty(name)) {\n    callback(new Errors.EEXIST('attribute already exists', path));\n  }\n  else if (flag === XATTR_REPLACE && !xattrs.hasOwnProperty(name)) {\n    callback(new Errors.ENOATTR(null, path));\n  }\n  else {\n    xattrs[name] = value;\n    context.putObject(node.id, node, update_time);\n  }\n}\n\n/**\n * ensure_root_directory. Creates a root node if necessary.\n *\n * Note: this should only be invoked when formatting a new file system.\n * Multiple invocations of this by separate instances will still result\n * in only a single super node.\n */\nfunction ensure_root_directory(context, callback) {\n  var superNode;\n  var directoryNode;\n  var directoryData;\n\n  function ensure_super_node(error, existingNode) {\n    if(!error && existingNode) {\n      // Another instance has beat us and already created the super node.\n      callback();\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      SuperNode.create({guid: context.guid}, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        superNode = result;\n        context.putObject(superNode.id, superNode, write_directory_node);\n      });\n    }\n  }\n\n  function write_directory_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      Node.create({guid: context.guid, id: superNode.rnode, mode: MODE_DIRECTORY}, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        directoryNode = result;\n        directoryNode.nlinks += 1;\n        context.putObject(directoryNode.id, directoryNode, write_directory_data);\n      });\n    }\n  }\n\n  function write_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = {};\n      context.putObject(directoryNode.data, directoryData, callback);\n    }\n  }\n\n  context.getObject(SUPER_NODE_ID, ensure_super_node);\n}\n\n/**\n * make_directory\n */\nfunction make_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var parentDirectoryNode;\n  var parentDirectoryData;\n\n  function check_if_directory_exists(error, result) {\n    if(!error && result) {\n      callback(new Errors.EEXIST(null, path));\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      find_node(context, parentPath, read_parent_directory_data);\n    }\n  }\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryNode = result;\n      context.getObject(parentDirectoryNode.data, write_directory_node);\n    }\n  }\n\n  function write_directory_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryData = result;\n      Node.create({guid: context.guid, mode: MODE_DIRECTORY}, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        directoryNode = result;\n        directoryNode.nlinks += 1;\n        context.putObject(directoryNode.id, directoryNode, write_directory_data);\n      });\n    }\n  }\n\n  function write_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = {};\n      context.putObject(directoryNode.data, directoryData, update_parent_directory_data);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryData[name] = new DirectoryEntry(directoryNode.id, MODE_DIRECTORY);\n      context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);\n    }\n  }\n\n  find_node(context, path, check_if_directory_exists);\n}\n\n/**\n * remove_directory\n */\nfunction remove_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var parentDirectoryNode;\n  var parentDirectoryData;\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryNode = result;\n      context.getObject(parentDirectoryNode.data, check_if_node_exists);\n    }\n  }\n\n  function check_if_node_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else if(ROOT_DIRECTORY_NAME == name) {\n      callback(new Errors.EBUSY(null, path));\n    } else if(!_(result).has(name)) {\n      callback(new Errors.ENOENT(null, path));\n    } else {\n      parentDirectoryData = result;\n      directoryNode = parentDirectoryData[name].id;\n      context.getObject(directoryNode, check_if_node_is_directory);\n    }\n  }\n\n  function check_if_node_is_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.mode != MODE_DIRECTORY) {\n      callback(new Errors.ENOTDIR(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_directory_is_empty);\n    }\n  }\n\n  function check_if_directory_is_empty(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).size() > 0) {\n        callback(new Errors.ENOTEMPTY(null, path));\n      } else {\n        remove_directory_entry_from_parent_directory_node();\n      }\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, remove_directory_node);\n    }\n  }\n\n  function remove_directory_entry_from_parent_directory_node() {\n    delete parentDirectoryData[name];\n    context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);\n  }\n\n  function remove_directory_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(directoryNode.id, remove_directory_data);\n    }\n  }\n\n  function remove_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(directoryNode.data, callback);\n    }\n  }\n\n  find_node(context, parentPath, read_parent_directory_data);\n}\n\nfunction open_file(context, path, flags, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var directoryEntry;\n  var fileNode;\n  var fileData;\n\n  var followedCount = 0;\n\n  if(ROOT_DIRECTORY_NAME == name) {\n    if(_(flags).contains(O_WRITE)) {\n      callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n    } else {\n      find_node(context, path, set_file_node);\n    }\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.mode !== MODE_DIRECTORY) {\n      callback(new Errors.ENOENT(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).has(name)) {\n        if(_(flags).contains(O_EXCLUSIVE)) {\n          callback(new Errors.ENOENT('O_CREATE and O_EXCLUSIVE are set, and the named file exists', path));\n        } else {\n          directoryEntry = directoryData[name];\n          if(directoryEntry.type == MODE_DIRECTORY && _(flags).contains(O_WRITE)) {\n            callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n          } else {\n            context.getObject(directoryEntry.id, check_if_symbolic_link);\n          }\n        }\n      } else {\n        if(!_(flags).contains(O_CREATE)) {\n          callback(new Errors.ENOENT('O_CREATE is not set and the named file does not exist', path));\n        } else {\n          write_file_node();\n        }\n      }\n    }\n  }\n\n  function check_if_symbolic_link(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var node = result;\n      if(node.mode == MODE_SYMBOLIC_LINK) {\n        followedCount++;\n        if(followedCount > SYMLOOP_MAX){\n          callback(new Errors.ELOOP(null, path));\n        } else {\n          follow_symbolic_link(node.data);\n        }\n      } else {\n        set_file_node(undefined, node);\n      }\n    }\n  }\n\n  function follow_symbolic_link(data) {\n    data = normalize(data);\n    parentPath = dirname(data);\n    name = basename(data);\n    if(ROOT_DIRECTORY_NAME == name) {\n      if(_(flags).contains(O_WRITE)) {\n        callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n      } else {\n        find_node(context, path, set_file_node);\n      }\n    }\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function set_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      callback(null, fileNode);\n    }\n  }\n\n  function write_file_node() {\n    Node.create({guid: context.guid, mode: MODE_FILE}, function(error, result) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      fileNode = result;\n      fileNode.nlinks += 1;\n      context.putObject(fileNode.id, fileNode, write_file_data);\n    });\n  }\n\n  function write_file_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = new Buffer(0);\n      fileData.fill(0);\n      context.putBuffer(fileNode.data, fileData, update_directory_data);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, handle_update_result);\n    }\n  }\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData[name] = new DirectoryEntry(fileNode.id, MODE_FILE);\n      context.putObject(directoryNode.data, directoryData, update_time);\n    }\n  }\n\n  function handle_update_result(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, fileNode);\n    }\n  }\n}\n\nfunction replace_data(context, ofd, buffer, offset, length, callback) {\n  var fileNode;\n\n  function return_nbytes(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, length);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);\n    }\n  }\n\n  function update_file_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function write_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      var newData = new Buffer(length);\n      newData.fill(0);\n      buffer.copy(newData, 0, offset, offset + length);\n      ofd.position = length;\n\n      fileNode.size = length;\n      fileNode.version += 1;\n\n      context.putBuffer(fileNode.data, newData, update_file_node);\n    }\n  }\n\n  context.getObject(ofd.id, write_file_data);\n}\n\nfunction write_data(context, ofd, buffer, offset, length, position, callback) {\n  var fileNode;\n  var fileData;\n\n  function return_nbytes(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, length);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);\n    }\n  }\n\n  function update_file_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function update_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = result;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var _position = (!(undefined === position || null === position)) ? position : ofd.position;\n      var newSize = Math.max(fileData.length, _position + length);\n      var newData = new Buffer(newSize);\n      newData.fill(0);\n      if(fileData) {\n        fileData.copy(newData);\n      }\n      buffer.copy(newData, _position, offset, offset + length);\n      if(undefined === position) {\n        ofd.position += length;\n      }\n\n      fileNode.size = newSize;\n      fileNode.version += 1;\n\n      context.putBuffer(fileNode.data, newData, update_file_node);\n    }\n  }\n\n  function read_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      context.getBuffer(fileNode.data, update_file_data);\n    }\n  }\n\n  context.getObject(ofd.id, read_file_data);\n}\n\nfunction read_data(context, ofd, buffer, offset, length, position, callback) {\n  var fileNode;\n  var fileData;\n\n  function handle_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = result;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var _position = (!(undefined === position || null === position)) ? position : ofd.position;\n      length = (_position + length > buffer.length) ? length - _position : length;\n      fileData.copy(buffer, offset, _position, _position + length);\n      if(undefined === position) {\n        ofd.position += length;\n      }\n      callback(null, length);\n    }\n  }\n\n  function read_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.mode === 'DIRECTORY') {\n      callback(new Errors.EISDIR('the named file is a directory', ofd.path));\n    } else {\n      fileNode = result;\n      context.getBuffer(fileNode.data, handle_file_data);\n    }\n  }\n\n  context.getObject(ofd.id, read_file_data);\n}\n\nfunction stat_file(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  find_node(context, path, callback);\n}\n\nfunction fstat_file(context, ofd, callback) {\n  ofd.getNode(context, callback);\n}\n\nfunction lstat_file(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n\n  if(ROOT_DIRECTORY_NAME == name) {\n    find_node(context, path, callback);\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', path));\n      } else {\n        context.getObject(directoryData[name].id, callback);\n      }\n    }\n  }\n}\n\nfunction link_node(context, oldpath, newpath, callback) {\n  oldpath = normalize(oldpath);\n  var oldname = basename(oldpath);\n  var oldParentPath = dirname(oldpath);\n\n  newpath = normalize(newpath);\n  var newname = basename(newpath);\n  var newParentPath = dirname(newpath);\n\n  var oldDirectoryNode;\n  var oldDirectoryData;\n  var newDirectoryNode;\n  var newDirectoryData;\n  var fileNode;\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      update_node_times(context, newpath,  fileNode, { ctime: Date.now() }, callback);\n    }\n  }\n\n  function update_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      fileNode.nlinks += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function read_directory_entry(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      context.getObject(newDirectoryData[newname].id, update_file_node);\n    }\n  }\n\n  function check_if_new_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newDirectoryData = result;\n      if(_(newDirectoryData).has(newname)) {\n        callback(new Errors.EEXIST('newpath resolves to an existing file', newname));\n      } else {\n        newDirectoryData[newname] = oldDirectoryData[oldname];\n        context.putObject(newDirectoryNode.data, newDirectoryData, read_directory_entry);\n      }\n    }\n  }\n\n  function read_new_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newDirectoryNode = result;\n      context.getObject(newDirectoryNode.data, check_if_new_file_exists);\n    }\n  }\n\n  function check_if_old_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldDirectoryData = result;\n      if(!_(oldDirectoryData).has(oldname)) {\n        callback(new Errors.ENOENT('a component of either path prefix does not exist', oldname));\n      } else if(oldDirectoryData[oldname].type === 'DIRECTORY') {\n        callback(new Errors.EPERM('oldpath refers to a directory'));\n      } else {\n        find_node(context, newParentPath, read_new_directory_data);\n      }\n    }\n  }\n\n  function read_old_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldDirectoryNode = result;\n      context.getObject(oldDirectoryNode.data, check_if_old_file_exists);\n    }\n  }\n\n  find_node(context, oldParentPath, read_old_directory_data);\n}\n\nfunction unlink_node(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var fileNode;\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      delete directoryData[name];\n      context.putObject(directoryNode.data, directoryData, function(error) {\n        var now = Date.now();\n        update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);\n      });\n    }\n  }\n\n  function delete_file_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(fileNode.data, update_directory_data);\n    }\n  }\n\n  function update_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      fileNode.nlinks -= 1;\n      if(fileNode.nlinks < 1) {\n        context.delete(fileNode.id, delete_file_data);\n      } else {\n        context.putObject(fileNode.id, fileNode, function(error) {\n          update_node_times(context, path, fileNode, { ctime: Date.now() }, update_directory_data);\n        });\n      }\n    }\n  }\n\n  function check_if_node_is_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.mode === 'DIRECTORY') {\n      callback(new Errors.EPERM('unlink not permitted on directories', name));\n    } else {\n      update_file_node(null, result);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));\n      } else {\n        context.getObject(directoryData[name].id, check_if_node_is_directory);\n      }\n    }\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  find_node(context, parentPath, read_directory_data);\n}\n\nfunction read_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n\n  var directoryNode;\n  var directoryData;\n\n  function handle_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      var files = Object.keys(directoryData);\n      callback(null, files);\n    }\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.mode !== MODE_DIRECTORY) {\n      callback(new Errors.ENOTDIR(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, handle_directory_data);\n    }\n  }\n\n  find_node(context, path, read_directory_data);\n}\n\nfunction make_symbolic_link(context, srcpath, dstpath, callback) {\n  dstpath = normalize(dstpath);\n  var name = basename(dstpath);\n  var parentPath = dirname(dstpath);\n\n  var directoryNode;\n  var directoryData;\n  var fileNode;\n\n  if(ROOT_DIRECTORY_NAME == name) {\n    callback(new Errors.EEXIST(null, name));\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).has(name)) {\n        callback(new Errors.EEXIST(null, name));\n      } else {\n        write_file_node();\n      }\n    }\n  }\n\n  function write_file_node() {\n    Node.create({guid: context.guid, mode: MODE_SYMBOLIC_LINK}, function(error, result) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      fileNode = result;\n      fileNode.nlinks += 1;\n      fileNode.size = srcpath.length;\n      fileNode.data = srcpath;\n      context.putObject(fileNode.id, fileNode, update_directory_data);\n    });\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData[name] = new DirectoryEntry(fileNode.id, MODE_SYMBOLIC_LINK);\n      context.putObject(directoryNode.data, directoryData, update_time);\n    }\n  }\n}\n\nfunction read_link(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n\n  find_node(context, parentPath, read_directory_data);\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));\n      } else {\n        context.getObject(directoryData[name].id, check_if_symbolic);\n      }\n    }\n  }\n\n  function check_if_symbolic(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      if(result.mode != MODE_SYMBOLIC_LINK) {\n        callback(new Errors.EINVAL('path not a symbolic link', path));\n      } else {\n        callback(null, result.data);\n      }\n    }\n  }\n}\n\nfunction truncate_file(context, path, length, callback) {\n  path = normalize(path);\n\n  var fileNode;\n\n  function read_file_data (error, node) {\n    if (error) {\n      callback(error);\n    } else if(node.mode == MODE_DIRECTORY ) {\n      callback(new Errors.EISDIR(null, path));\n    } else{\n      fileNode = node;\n      context.getBuffer(fileNode.data, truncate_file_data);\n    }\n  }\n\n  function truncate_file_data(error, fileData) {\n    if (error) {\n      callback(error);\n    } else {\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var data = new Buffer(length);\n      data.fill(0);\n      if(fileData) {\n        fileData.copy(data);\n      }\n      context.putBuffer(fileNode.data, data, update_file_node);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, path, fileNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_file_node (error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode.size = length;\n      fileNode.version += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  if(length < 0) {\n    callback(new Errors.EINVAL('length cannot be negative'));\n  } else {\n    find_node(context, path, read_file_data);\n  }\n}\n\nfunction ftruncate_file(context, ofd, length, callback) {\n  var fileNode;\n\n  function read_file_data (error, node) {\n    if (error) {\n      callback(error);\n    } else if(node.mode == MODE_DIRECTORY ) {\n      callback(new Errors.EISDIR());\n    } else{\n      fileNode = node;\n      context.getBuffer(fileNode.data, truncate_file_data);\n    }\n  }\n\n  function truncate_file_data(error, fileData) {\n    if (error) {\n      callback(error);\n    } else {\n      var data;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      if(fileData) {\n        data = fileData.slice(0, length);\n      } else {\n        data = new Buffer(length);\n        data.fill(0);\n      }\n      context.putBuffer(fileNode.data, data, update_file_node);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_file_node (error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode.size = length;\n      fileNode.version += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  if(length < 0) {\n    callback(new Errors.EINVAL('length cannot be negative'));\n  } else {\n    ofd.getNode(context, read_file_data);\n  }\n}\n\nfunction utimes_file(context, path, atime, mtime, callback) {\n  path = normalize(path);\n\n  function update_times(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      update_node_times(context, path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);\n    }\n  }\n\n  if (typeof atime != 'number' || typeof mtime != 'number') {\n    callback(new Errors.EINVAL('atime and mtime must be number', path));\n  }\n  else if (atime < 0 || mtime < 0) {\n    callback(new Errors.EINVAL('atime and mtime must be positive integers', path));\n  }\n  else {\n    find_node(context, path, update_times);\n  }\n}\n\nfunction futimes_file(context, ofd, atime, mtime, callback) {\n\n  function update_times (error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      update_node_times(context, ofd.path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);\n    }\n  }\n\n  if (typeof atime != 'number' || typeof mtime != 'number') {\n    callback(new Errors.EINVAL('atime and mtime must be a number'));\n  }\n  else if (atime < 0 || mtime < 0) {\n    callback(new Errors.EINVAL('atime and mtime must be positive integers'));\n  }\n  else {\n    ofd.getNode(context, update_times);\n  }\n}\n\nfunction setxattr_file(context, path, name, value, flag, callback) {\n  path = normalize(path);\n\n  function setxattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n    set_extended_attribute(context, path, node, name, value, flag, callback);\n  }\n\n  if (typeof name != 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else if (flag !== null &&\n           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {\n    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE', path));\n  }\n  else {\n    find_node(context, path, setxattr);\n  }\n}\n\nfunction fsetxattr_file (context, ofd, name, value, flag, callback) {\n  function setxattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n    set_extended_attribute(context, ofd.path, node, name, value, flag, callback);\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string'));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else if (flag !== null &&\n           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {\n    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE'));\n  }\n  else {\n    ofd.getNode(context, setxattr);\n  }\n}\n\nfunction getxattr_file (context, path, name, callback) {\n  path = normalize(path);\n\n  function get_xattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR(null, path));\n    }\n    else {\n      callback(null, xattrs[name]);\n    }\n  }\n\n  if (typeof name != 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else {\n    find_node(context, path, get_xattr);\n  }\n}\n\nfunction fgetxattr_file (context, ofd, name, callback) {\n\n  function get_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR());\n    }\n    else {\n      callback(null, xattrs[name]);\n    }\n  }\n\n  if (typeof name != 'string') {\n    callback(new Errors.EINVAL());\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else {\n    ofd.getNode(context, get_xattr);\n  }\n}\n\nfunction removexattr_file (context, path, name, callback) {\n  path = normalize(path);\n\n  function remove_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    function update_time(error) {\n      if(error) {\n        callback(error);\n      } else {\n        update_node_times(context, path, node, { ctime: Date.now() }, callback);\n      }\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR(null, path));\n    }\n    else {\n      delete xattrs[name];\n      context.putObject(node.id, node, update_time);\n    }\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else {\n    find_node(context, path, remove_xattr);\n  }\n}\n\nfunction fremovexattr_file (context, ofd, name, callback) {\n\n  function remove_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    function update_time(error) {\n      if(error) {\n        callback(error);\n      } else {\n        update_node_times(context, ofd.path, node, { ctime: Date.now() }, callback);\n      }\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR());\n    }\n    else {\n      delete xattrs[name];\n      context.putObject(node.id, node, update_time);\n    }\n  }\n\n  if (typeof name != 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string'));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else {\n    ofd.getNode(context, remove_xattr);\n  }\n}\n\nfunction validate_flags(flags) {\n  if(!_(O_FLAGS).has(flags)) {\n    return null;\n  }\n  return O_FLAGS[flags];\n}\n\nfunction validate_file_options(options, enc, fileMode){\n  if(!options) {\n    options = { encoding: enc, flag: fileMode };\n  } else if(typeof options === \"function\") {\n    options = { encoding: enc, flag: fileMode };\n  } else if(typeof options === \"string\") {\n    options = { encoding: options, flag: fileMode };\n  }\n  return options;\n}\n\nfunction pathCheck(path, callback) {\n  var err;\n\n  if(!path) {\n    err = new Errors.EINVAL('Path must be a string', path);\n  } else if(isNullPath(path)) {\n    err = new Errors.EINVAL('Path must be a string without null bytes.', path);\n  } else if(!isAbsolutePath(path)) {\n    err = new Errors.EINVAL('Path must be absolute.', path);\n  }\n\n  if(err) {\n    callback(err);\n    return false;\n  }\n  return true;\n}\n\n\nfunction open(fs, context, path, flags, mode, callback) {\n  // NOTE: we support the same signature as node with a `mode` arg,\n  // but ignore it.\n  callback = arguments[arguments.length - 1];\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, fileNode) {\n    if(error) {\n      callback(error);\n    } else {\n      var position;\n      if(_(flags).contains(O_APPEND)) {\n        position = fileNode.size;\n      } else {\n        position = 0;\n      }\n      var openFileDescription = new OpenFileDescription(path, fileNode.id, flags, position);\n      var fd = fs.allocDescriptor(openFileDescription);\n      callback(null, fd);\n    }\n  }\n\n  flags = validate_flags(flags);\n  if(!flags) {\n    callback(new Errors.EINVAL('flags is not valid'), path);\n  }\n\n  open_file(context, path, flags, check_result);\n}\n\nfunction close(fs, context, fd, callback) {\n  if(!_(fs.openFiles).has(fd)) {\n    callback(new Errors.EBADF());\n  } else {\n    fs.releaseDescriptor(fd);\n    callback(null);\n  }\n}\n\nfunction mknod(fs, context, path, mode, callback) {\n  if(!pathCheck(path, callback)) return;\n  make_node(context, path, mode, callback);\n}\n\nfunction mkdir(fs, context, path, mode, callback) {\n  // NOTE: we support passing a mode arg, but we ignore it internally for now.\n  callback = arguments[arguments.length - 1];\n  if(!pathCheck(path, callback)) return;\n  make_directory(context, path, callback);\n}\n\nfunction rmdir(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  remove_directory(context, path, callback);\n}\n\nfunction stat(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  stat_file(context, path, check_result);\n}\n\nfunction fstat(fs, context, fd, callback) {\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else {\n    fstat_file(context, ofd, check_result);\n  }\n}\n\nfunction link(fs, context, oldpath, newpath, callback) {\n  if(!pathCheck(oldpath, callback)) return;\n  if(!pathCheck(newpath, callback)) return;\n  link_node(context, oldpath, newpath, callback);\n}\n\nfunction unlink(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  unlink_node(context, path, callback);\n}\n\nfunction read(fs, context, fd, buffer, offset, length, position, callback) {\n  // Follow how node.js does this\n  function wrapped_cb(err, bytesRead) {\n    // Retain a reference to buffer so that it can't be GC'ed too soon.\n    callback(err, bytesRead || 0, buffer);\n  }\n\n  offset = (undefined === offset) ? 0 : offset;\n  length = (undefined === length) ? buffer.length - offset : length;\n  callback = arguments[arguments.length - 1];\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_READ)) {\n    callback(new Errors.EBADF('descriptor does not permit reading'));\n  } else {\n    read_data(context, ofd, buffer, offset, length, position, wrapped_cb);\n  }\n}\n\nfunction readFile(fs, context, path, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, null, 'r');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'r');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);\n    var fd = fs.allocDescriptor(ofd);\n\n    function cleanup() {\n      fs.releaseDescriptor(fd);\n    }\n\n    fstat_file(context, ofd, function(err, fstatResult) {\n      if(err) {\n        cleanup();\n        return callback(err);\n      }\n\n      var stats = new Stats(fstatResult, fs.name);\n\n      if(stats.isDirectory()) {\n        cleanup();\n        return callback(new Errors.EISDIR('illegal operation on directory', path));\n      }\n\n      var size = stats.size;\n      var buffer = new Buffer(size);\n      buffer.fill(0);\n\n      read_data(context, ofd, buffer, 0, size, 0, function(err, nbytes) {\n        cleanup();\n\n        if(err) {\n          return callback(err);\n        }\n\n        var data;\n        if(options.encoding === 'utf8') {\n          data = Encoding.decode(buffer);\n        } else {\n          data = buffer;\n        }\n        callback(null, data);\n      });\n    });\n  });\n}\n\nfunction write(fs, context, fd, buffer, offset, length, position, callback) {\n  callback = arguments[arguments.length - 1];\n  offset = (undefined === offset) ? 0 : offset;\n  length = (undefined === length) ? buffer.length - offset : length;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else if(buffer.length - offset < length) {\n    callback(new Errors.EIO('intput buffer is too small'));\n  } else {\n    write_data(context, ofd, buffer, offset, length, position, callback);\n  }\n}\n\nfunction writeFile(fs, context, path, data, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, 'utf8', 'w');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'w');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  data = data || '';\n  if(typeof data === \"number\") {\n    data = '' + data;\n  }\n  if(typeof data === \"string\" && options.encoding === 'utf8') {\n    data = Encoding.encode(data);\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);\n    var fd = fs.allocDescriptor(ofd);\n\n    replace_data(context, ofd, data, 0, data.length, function(err, nbytes) {\n      fs.releaseDescriptor(fd);\n\n      if(err) {\n        return callback(err);\n      }\n      callback(null);\n    });\n  });\n}\n\nfunction appendFile(fs, context, path, data, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, 'utf8', 'a');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'a');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  data = data || '';\n  if(typeof data === \"number\") {\n    data = '' + data;\n  }\n  if(typeof data === \"string\" && options.encoding === 'utf8') {\n    data = Encoding.encode(data);\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, fileNode.size);\n    var fd = fs.allocDescriptor(ofd);\n\n    write_data(context, ofd, data, 0, data.length, ofd.position, function(err, nbytes) {\n      fs.releaseDescriptor(fd);\n\n      if(err) {\n        return callback(err);\n      }\n      callback(null);\n    });\n  });\n}\n\nfunction exists(fs, context, path, callback) {\n  function cb(err, stats) {\n    callback(err ? false : true);\n  }\n  stat(fs, context, path, cb);\n}\n\nfunction getxattr(fs, context, path, name, callback) {\n  if (!pathCheck(path, callback)) return;\n  getxattr_file(context, path, name, callback);\n}\n\nfunction fgetxattr(fs, context, fd, name, callback) {\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else {\n    fgetxattr_file(context, ofd, name, callback);\n  }\n}\n\nfunction setxattr(fs, context, path, name, value, flag, callback) {\n  if(typeof flag === 'function') {\n    callback = flag;\n    flag = null;\n  }\n\n  if (!pathCheck(path, callback)) return;\n  setxattr_file(context, path, name, value, flag, callback);\n}\n\nfunction fsetxattr(fs, context, fd, name, value, flag, callback) {\n  if(typeof flag === 'function') {\n    callback = flag;\n    flag = null;\n  }\n\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else if (!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  }\n  else {\n    fsetxattr_file(context, ofd, name, value, flag, callback);\n  }\n}\n\nfunction removexattr(fs, context, path, name, callback) {\n  if (!pathCheck(path, callback)) return;\n  removexattr_file(context, path, name, callback);\n}\n\nfunction fremovexattr(fs, context, fd, name, callback) {\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else if (!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  }\n  else {\n    fremovexattr_file(context, ofd, name, callback);\n  }\n}\n\nfunction lseek(fs, context, fd, offset, whence, callback) {\n  function update_descriptor_position(error, stats) {\n    if(error) {\n      callback(error);\n    } else {\n      if(stats.size + offset < 0) {\n        callback(new Errors.EINVAL('resulting file offset would be negative'));\n      } else {\n        ofd.position = stats.size + offset;\n        callback(null, ofd.position);\n      }\n    }\n  }\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  }\n\n  if('SET' === whence) {\n    if(offset < 0) {\n      callback(new Errors.EINVAL('resulting file offset would be negative'));\n    } else {\n      ofd.position = offset;\n      callback(null, ofd.position);\n    }\n  } else if('CUR' === whence) {\n    if(ofd.position + offset < 0) {\n      callback(new Errors.EINVAL('resulting file offset would be negative'));\n    } else {\n      ofd.position += offset;\n      callback(null, ofd.position);\n    }\n  } else if('END' === whence) {\n    fstat_file(context, ofd, update_descriptor_position);\n  } else {\n    callback(new Errors.EINVAL('whence argument is not a proper value'));\n  }\n}\n\nfunction readdir(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  read_directory(context, path, callback);\n}\n\nfunction utimes(fs, context, path, atime, mtime, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  var currentTime = Date.now();\n  atime = (atime) ? atime : currentTime;\n  mtime = (mtime) ? mtime : currentTime;\n\n  utimes_file(context, path, atime, mtime, callback);\n}\n\nfunction futimes(fs, context, fd, atime, mtime, callback) {\n  var currentTime = Date.now();\n  atime = (atime) ? atime : currentTime;\n  mtime = (mtime) ? mtime : currentTime;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    futimes_file(context, ofd, atime, mtime, callback);\n  }\n}\n\nfunction rename(fs, context, oldpath, newpath, callback) {\n  if(!pathCheck(oldpath, callback)) return;\n  if(!pathCheck(newpath, callback)) return;\n\n  oldpath = normalize(oldpath);\n  newpath = normalize(newpath);\n\n  var oldParentPath = Path.dirname(oldpath);\n  var newParentPath = Path.dirname(oldpath);\n  var oldName = Path.basename(oldpath);\n  var newName = Path.basename(newpath);\n  var oldParentDirectory, oldParentData;\n  var newParentDirectory, newParentData;\n\n  function update_times(error, newNode) {\n    if(error) {\n      callback(error);\n    } else {\n      update_node_times(context, newpath,  newNode, { ctime: Date.now() }, callback);\n    }\n  }\n\n  function read_new_directory(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.getObject(newParentData[newName].id, update_times);\n    }\n  }\n\n  function update_old_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      if(oldParentDirectory.id === newParentDirectory.id) {\n        oldParentData = newParentData;\n      }\n      delete oldParentData[oldName];\n      context.putObject(oldParentDirectory.data, oldParentData, read_new_directory);\n    }\n  }\n\n  function update_new_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentData[newName] = oldParentData[oldName];\n      context.putObject(newParentDirectory.data, newParentData, update_old_parent_directory_data);\n    }\n  }\n\n  function check_if_new_directory_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentData = result;\n      if(_(newParentData).has(newName)) {\n        remove_directory(context, newpath, update_new_parent_directory_data);\n      } else {\n        update_new_parent_directory_data();\n      }\n    }\n  }\n\n  function read_new_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentDirectory = result;\n      context.getObject(newParentDirectory.data, check_if_new_directory_exists);\n    }\n  }\n\n  function get_new_parent_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldParentData = result;\n      find_node(context, newParentPath, read_new_parent_directory_data);\n    }\n  }\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldParentDirectory = result;\n      context.getObject(result.data, get_new_parent_directory);\n    }\n  }\n\n  function unlink_old_file(error) {\n    if(error) {\n      callback(error);\n    } else {\n      unlink_node(context, oldpath, callback);\n    }\n  }\n\n  function check_node_type(error, node) {\n    if(error) {\n      callback(error);\n    } else if(node.mode === 'DIRECTORY') {\n      find_node(context, oldParentPath, read_parent_directory_data);\n    } else {\n      link_node(context, oldpath, newpath, unlink_old_file);\n    }\n  }\n\n  find_node(context, oldpath, check_node_type);\n}\n\nfunction symlink(fs, context, srcpath, dstpath, type, callback) {\n  // NOTE: we support passing the `type` arg, but ignore it.\n  callback = arguments[arguments.length - 1];\n  if(!pathCheck(srcpath, callback)) return;\n  if(!pathCheck(dstpath, callback)) return;\n  make_symbolic_link(context, srcpath, dstpath, callback);\n}\n\nfunction readlink(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  read_link(context, path, callback);\n}\n\nfunction lstat(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  lstat_file(context, path, check_result);\n}\n\nfunction truncate(fs, context, path, length, callback) {\n  // NOTE: length is optional\n  callback = arguments[arguments.length - 1];\n  length = length || 0;\n\n  if(!pathCheck(path, callback)) return;\n  truncate_file(context, path, length, callback);\n}\n\nfunction ftruncate(fs, context, fd, length, callback) {\n  // NOTE: length is optional\n  callback = arguments[arguments.length - 1];\n  length = length || 0;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    ftruncate_file(context, ofd, length, callback);\n  }\n}\n\nmodule.exports = {\n  ensureRootDirectory: ensure_root_directory,\n  open: open,\n  close: close,\n  mknod: mknod,\n  mkdir: mkdir,\n  rmdir: rmdir,\n  unlink: unlink,\n  stat: stat,\n  fstat: fstat,\n  link: link,\n  read: read,\n  readFile: readFile,\n  write: write,\n  writeFile: writeFile,\n  appendFile: appendFile,\n  exists: exists,\n  getxattr: getxattr,\n  fgetxattr: fgetxattr,\n  setxattr: setxattr,\n  fsetxattr: fsetxattr,\n  removexattr: removexattr,\n  fremovexattr: fremovexattr,\n  lseek: lseek,\n  readdir: readdir,\n  utimes: utimes,\n  futimes: futimes,\n  rename: rename,\n  symlink: symlink,\n  readlink: readlink,\n  lstat: lstat,\n  truncate: truncate,\n  ftruncate: ftruncate\n};\n","var _ = require('../../lib/nodash.js');\n\nvar isNullPath = require('../path.js').isNull;\nvar nop = require('../shared.js').nop;\n\nvar Constants = require('../constants.js');\nvar FILE_SYSTEM_NAME = Constants.FILE_SYSTEM_NAME;\nvar FS_FORMAT = Constants.FS_FORMAT;\nvar FS_READY = Constants.FS_READY;\nvar FS_PENDING = Constants.FS_PENDING;\nvar FS_ERROR = Constants.FS_ERROR;\nvar FS_NODUPEIDCHECK = Constants.FS_NODUPEIDCHECK;\n\nvar providers = require('../providers/index.js');\n\nvar Shell = require('../shell/shell.js');\nvar Intercom = require('../../lib/intercom.js');\nvar FSWatcher = require('../fs-watcher.js');\nvar Errors = require('../errors.js');\nvar defaultGuidFn = require('../shared.js').guid;\n\nvar STDIN = Constants.STDIN;\nvar STDOUT = Constants.STDOUT;\nvar STDERR = Constants.STDERR;\nvar FIRST_DESCRIPTOR = Constants.FIRST_DESCRIPTOR;\n\n// The core fs operations live on impl\nvar impl = require('./implementation.js');\n\n// node.js supports a calling pattern that leaves off a callback.\nfunction maybeCallback(callback) {\n  if(typeof callback === \"function\") {\n    return callback;\n  }\n  return function(err) {\n    if(err) {\n      throw err;\n    }\n  };\n}\n\n// Default callback that logs an error if passed in\nfunction defaultCallback(err) {\n  if(err) {\n    console.error('Filer error: ', err);\n  }\n}\n\n/**\n * FileSystem\n *\n * A FileSystem takes an `options` object, which can specify a number of,\n * options.  All options are optional, and include:\n *\n * name: the name of the file system, defaults to \"local\"\n *\n * flags: one or more flags to use when creating/opening the file system.\n *        For example: \"FORMAT\" will cause the file system to be formatted.\n *        No explicit flags are set by default.\n *\n * provider: an explicit storage provider to use for the file\n *           system's database context provider.  A number of context\n *           providers are included (see /src/providers), and users\n *           can write one of their own and pass it in to be used.\n *           By default an IndexedDB provider is used.\n *\n * guid: a function for generating unique IDs for nodes in the filesystem.\n *       Use this to override the built-in UUID generation. (Used mainly for tests).\n *\n * callback: a callback function to be executed when the file system becomes\n *           ready for use. Depending on the context provider used, this might\n *           be right away, or could take some time. The callback should expect\n *           an `error` argument, which will be null if everything worked.  Also\n *           users should check the file system's `readyState` and `error`\n *           properties to make sure it is usable.\n */\nfunction FileSystem(options, callback) {\n  options = options || {};\n  callback = callback || defaultCallback;\n\n  var flags = options.flags;\n  var guid = options.guid ? options.guid : defaultGuidFn;\n  var provider = options.provider || new providers.Default(options.name || FILE_SYSTEM_NAME);\n  // If we're given a provider, match its name unless we get an explicit name\n  var name = options.name || provider.name;\n  var forceFormatting = _(flags).contains(FS_FORMAT);\n\n  var fs = this;\n  fs.readyState = FS_PENDING;\n  fs.name = name;\n  fs.error = null;\n\n  fs.stdin = STDIN;\n  fs.stdout = STDOUT;\n  fs.stderr = STDERR;\n\n  // Expose Shell constructor\n  this.Shell = Shell.bind(undefined, this);\n\n  // Safely expose the list of open files and file\n  // descriptor management functions\n  var openFiles = {};\n  var nextDescriptor = FIRST_DESCRIPTOR;\n  Object.defineProperty(this, \"openFiles\", {\n    get: function() { return openFiles; }\n  });\n  this.allocDescriptor = function(openFileDescription) {\n    var fd = nextDescriptor ++;\n    openFiles[fd] = openFileDescription;\n    return fd;\n  };\n  this.releaseDescriptor = function(fd) {\n    delete openFiles[fd];\n  };\n\n  // Safely expose the operation queue\n  var queue = [];\n  this.queueOrRun = function(operation) {\n    var error;\n\n    if(FS_READY == fs.readyState) {\n      operation.call(fs);\n    } else if(FS_ERROR == fs.readyState) {\n      error = new Errors.EFILESYSTEMERROR('unknown error');\n    } else {\n      queue.push(operation);\n    }\n\n    return error;\n  };\n  function runQueued() {\n    queue.forEach(function(operation) {\n      operation.call(this);\n    }.bind(fs));\n    queue = null;\n  }\n\n  // We support the optional `options` arg from node, but ignore it\n  this.watch = function(filename, options, listener) {\n    if(isNullPath(filename)) {\n      throw new Error('Path must be a string without null bytes.');\n    }\n    if(typeof options === 'function') {\n      listener = options;\n      options = {};\n    }\n    options = options || {};\n    listener = listener || nop;\n\n    var watcher = new FSWatcher();\n    watcher.start(filename, false, options.recursive);\n    watcher.on('change', listener);\n\n    return watcher;\n  };\n\n  // Deal with various approaches to node ID creation\n  function wrappedGuidFn(context) {\n    return function(callback) {\n      // Skip the duplicate ID check if asked to\n      if(_(flags).contains(FS_NODUPEIDCHECK)) {\n        callback(null, guid());\n        return;\n      }\n\n      // Otherwise (default) make sure this id is unused first\n      function guidWithCheck(callback) {\n        var id = guid();\n        context.getObject(id, function(err, value) {\n          if(err) {\n            callback(err);\n            return;\n          }\n\n          // If this id is unused, use it, otherwise find another\n          if(!value) {\n            callback(null, id);\n          } else {\n            guidWithCheck(callback);\n          }\n        });\n      }\n      guidWithCheck(callback);\n    };\n  }\n\n  // Let other instances (in this or other windows) know about\n  // any changes to this fs instance.\n  function broadcastChanges(changes) {\n    if(!changes.length) {\n      return;\n    }\n    var intercom = Intercom.getInstance();\n    changes.forEach(function(change) {\n      intercom.emit(change.event, change.path);\n    });\n  }\n\n  // Open file system storage provider\n  provider.open(function(err) {\n    function complete(error) {\n      function wrappedContext(methodName) {\n        var context = provider[methodName]();\n        context.flags = flags;\n        context.changes = [];\n        context.guid = wrappedGuidFn(context);\n\n        // When the context is finished, let the fs deal with any change events\n        context.close = function() {\n          var changes = context.changes;\n          broadcastChanges(changes);\n          changes.length = 0;\n        };\n\n        return context;\n      }\n\n      // Wrap the provider so we can extend the context with fs flags and\n      // an array of changes (e.g., watch event 'change' and 'rename' events\n      // for paths updated during the lifetime of the context). From this\n      // point forward we won't call open again, so it's safe to drop it.\n      fs.provider = {\n        openReadWriteContext: function() {\n          return wrappedContext('getReadWriteContext');\n        },\n        openReadOnlyContext: function() {\n          return wrappedContext('getReadOnlyContext');\n        }\n      };\n\n      if(error) {\n        fs.readyState = FS_ERROR;\n      } else {\n        fs.readyState = FS_READY;\n      }\n      runQueued();\n      callback(error, fs);\n    }\n\n    if(err) {\n      return complete(err);\n    }\n\n    var context = provider.getReadWriteContext();\n    context.guid = wrappedGuidFn(context);\n\n    // Mount the filesystem, formatting if necessary\n    if(forceFormatting) {\n      // Wipe the storage provider, then write root block\n      context.clear(function(err) {\n        if(err) {\n          return complete(err);\n        }\n        impl.ensureRootDirectory(context, complete);\n      });\n    } else {\n      // Use existing (or create new) root and mount\n      impl.ensureRootDirectory(context, complete);\n    }\n  });\n}\n\n// Expose storage providers on FileSystem constructor\nFileSystem.providers = providers;\n\n/**\n * Public API for FileSystem\n */\n[\n  'open',\n  'close',\n  'mknod',\n  'mkdir',\n  'rmdir',\n  'stat',\n  'fstat',\n  'link',\n  'unlink',\n  'read',\n  'readFile',\n  'write',\n  'writeFile',\n  'appendFile',\n  'exists',\n  'lseek',\n  'readdir',\n  'rename',\n  'readlink',\n  'symlink',\n  'lstat',\n  'truncate',\n  'ftruncate',\n  'utimes',\n  'futimes',\n  'setxattr',\n  'getxattr',\n  'fsetxattr',\n  'fgetxattr',\n  'removexattr',\n  'fremovexattr'\n].forEach(function(methodName) {\n  FileSystem.prototype[methodName] = function() {\n    var fs = this;\n    var args = Array.prototype.slice.call(arguments, 0);\n    var lastArgIndex = args.length - 1;\n\n    // We may or may not get a callback, and since node.js supports\n    // fire-and-forget style fs operations, we have to dance a bit here.\n    var missingCallback = typeof args[lastArgIndex] !== 'function';\n    var callback = maybeCallback(args[lastArgIndex]);\n\n    var error = fs.queueOrRun(function() {\n      var context = fs.provider.openReadWriteContext();\n\n      // Fail early if the filesystem is in an error state (e.g.,\n      // provider failed to open.\n      if(FS_ERROR === fs.readyState) {\n        var err = new Errors.EFILESYSTEMERROR('filesystem unavailable, operation canceled');\n        return callback.call(fs, err);\n      }\n\n      // Wrap the callback so we can explicitly close the context\n      function complete() {\n        context.close();\n        callback.apply(fs, arguments);\n      }\n\n      // Either add or replace the callback with our wrapper complete()\n      if(missingCallback) {\n        args.push(complete);\n      } else {\n        args[lastArgIndex] = complete;\n      }\n\n      // Forward this call to the impl's version, using the following\n      // call signature, with complete() as the callback/last-arg now:\n      // fn(fs, context, arg0, arg1, ... , complete);\n      var fnArgs = [fs, context].concat(args);\n      impl[methodName].apply(null, fnArgs);\n    });\n    if(error) {\n      callback(error);\n    }\n  };\n});\n\nmodule.exports = FileSystem;\n","module.exports = {\n  FileSystem: require('./filesystem/interface.js'),\n  Buffer: require('./buffer.js'),\n  Path: require('./path.js'),\n  Errors: require('./errors.js'),\n  Shell: require('./shell/shell.js')\n};\n"]}
\ No newline at end of file
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Cherry-picked bits of underscore.js, lodash.js\n\n/**\n * Lo-Dash 2.4.0 <http://lodash.com/>\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar ArrayProto = Array.prototype;\nvar nativeForEach = ArrayProto.forEach;\nvar nativeIndexOf = ArrayProto.indexOf;\nvar nativeSome = ArrayProto.some;\n\nvar ObjProto = Object.prototype;\nvar hasOwnProperty = ObjProto.hasOwnProperty;\nvar nativeKeys = Object.keys;\n\nvar breaker = {};\n\nfunction has(obj, key) {\n  return hasOwnProperty.call(obj, key);\n}\n\nvar keys = nativeKeys || function(obj) {\n  if (obj !== Object(obj)) throw new TypeError('Invalid object');\n  var keys = [];\n  for (var key in obj) if (has(obj, key)) keys.push(key);\n  return keys;\n};\n\nfunction size(obj) {\n  if (obj == 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Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// Based on https://github.com/joyent/node/blob/41e53e557992a7d552a8e23de035f9463da25c99/lib/path.js\n\n// resolves . and .. elements in a path array with directory names there\n// must be no slashes, empty elements, or device names (c:\\) in the array\n// (so also no leading and trailing slashes - it does not distinguish\n// relative and absolute paths)\nfunction normalizeArray(parts, allowAboveRoot) {\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = parts.length - 1; i >= 0; i--) {\n    var last = parts[i];\n    if (last === '.') {\n      parts.splice(i, 1);\n    } else if (last === '..') {\n      parts.splice(i, 1);\n      up++;\n    } else if (up) {\n      parts.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (allowAboveRoot) {\n    for (; up--; up) {\n      parts.unshift('..');\n    }\n  }\n\n  return parts;\n}\n\n// Split a filename into [root, dir, basename, ext], unix version\n// 'root' is just a slash, or nothing.\nvar splitPathRe =\n      /^(\\/?)([\\s\\S]+\\/(?!$)|\\/)?((?:\\.{1,2}$|[\\s\\S]+?)?(\\.[^.\\/]*)?)$/;\nvar splitPath = function(filename) {\n  var result = splitPathRe.exec(filename);\n  return [result[1] || '', result[2] || '', result[3] || '', result[4] || ''];\n};\n\n// path.resolve([from ...], to)\nfunction resolve() {\n  var resolvedPath = '',\n      resolvedAbsolute = false;\n\n  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {\n    // XXXfiler: we don't have process.cwd() so we use '/' as a fallback\n    var path = (i >= 0) ? arguments[i] : '/';\n\n    // Skip empty and invalid entries\n    if (typeof path !== 'string' || !path) {\n      continue;\n    }\n\n    resolvedPath = path + '/' + resolvedPath;\n    resolvedAbsolute = path.charAt(0) === '/';\n  }\n\n  // At this point the path should be resolved to a full absolute path, but\n  // handle relative paths to be safe (might happen when process.cwd() fails)\n\n  // Normalize the path\n  resolvedPath = normalizeArray(resolvedPath.split('/').filter(function(p) {\n    return !!p;\n  }), !resolvedAbsolute).join('/');\n\n  return ((resolvedAbsolute ? 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'/' : '') + path;\n}\n\nfunction join() {\n  var paths = Array.prototype.slice.call(arguments, 0);\n  return normalize(paths.filter(function(p, index) {\n    return p && typeof p === 'string';\n  }).join('/'));\n}\n\n// path.relative(from, to)\nfunction relative(from, to) {\n  from = resolve(from).substr(1);\n  to = resolve(to).substr(1);\n\n  function trim(arr) {\n    var start = 0;\n    for (; start < arr.length; start++) {\n      if (arr[start] !== '') break;\n    }\n\n    var end = arr.length - 1;\n    for (; end >= 0; end--) {\n      if (arr[end] !== '') break;\n    }\n\n    if (start > end) return [];\n    return arr.slice(start, end - start + 1);\n  }\n\n  var fromParts = trim(from.split('/'));\n  var toParts = trim(to.split('/'));\n\n  var length = Math.min(fromParts.length, toParts.length);\n  var samePartsLength = length;\n  for (var i = 0; i < length; i++) {\n    if (fromParts[i] !== toParts[i]) {\n      samePartsLength = i;\n      break;\n    }\n  }\n\n  var outputParts = [];\n  for (var i = samePartsLength; i < fromParts.length; i++) {\n    outputParts.push('..');\n  }\n\n  outputParts = outputParts.concat(toParts.slice(samePartsLength));\n\n  return outputParts.join('/');\n}\n\nfunction dirname(path) {\n  var result = splitPath(path),\n      root = result[0],\n      dir = result[1];\n\n  if (!root && !dir) {\n    // No dirname whatsoever\n    return '.';\n  }\n\n  if (dir) {\n    // It has a dirname, strip trailing slash\n    dir = dir.substr(0, dir.length - 1);\n  }\n\n  return root + dir;\n}\n\nfunction basename(path, ext) {\n  var f = splitPath(path)[2];\n  // TODO: make this comparison case-insensitive on windows?\n  if (ext && f.substr(-1 * ext.length) === ext) {\n    f = f.substr(0, f.length - ext.length);\n  }\n  // XXXfiler: node.js just does `return f`\n  return f === \"\" ? \"/\" : f;\n}\n\nfunction extname(path) {\n  return splitPath(path)[3];\n}\n\nfunction isAbsolute(path) {\n  if(path.charAt(0) === '/') {\n    return true;\n  }\n  return false;\n}\n\nfunction isNull(path) {\n  if (('' + path).indexOf('\\u0000') !== -1) {\n    return true;\n  }\n  return false;\n}\n\n// Make sure we don't double-add a trailing slash (e.g., '/' -> '//')\nfunction addTrailing(path) {\n  return path.replace(/\\/*$/, '/');\n}\n\n// Deal with multiple slashes at the end, one, or none\n// and make sure we don't return the empty string.\nfunction removeTrailing(path) {\n  path = path.replace(/\\/*$/, '');\n  return path === '' ? '/' : path;\n}\n\n// XXXfiler: we don't support path.exists() or path.existsSync(), which\n// are deprecated, and need a FileSystem instance to work. Use fs.stat().\n\nmodule.exports = {\n  normalize: normalize,\n  resolve: resolve,\n  join: join,\n  relative: relative,\n  sep: '/',\n  delimiter: ':',\n  dirname: dirname,\n  basename: basename,\n  extname: extname,\n  isAbsolute: isAbsolute,\n  isNull: isNull,\n  // Non-node but useful...\n  addTrailing: addTrailing,\n  removeTrailing: removeTrailing\n};\n","function guid() {\n  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {\n    var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);\n    return v.toString(16);\n  }).toUpperCase();\n}\n\nfunction nop() {}\n\n/**\n * Convert a Uint8Array to a regular array\n */\nfunction u8toArray(u8) {\n  var array = [];\n  var len = u8.length;\n  for(var i = 0; i < len; i++) {\n    array[i] = u8[i];\n  }\n  return array;\n}\n\nmodule.exports = {\n  guid: guid,\n  u8toArray: u8toArray,\n  nop: nop\n};\n","var O_READ = 'READ';\nvar O_WRITE = 'WRITE';\nvar O_CREATE = 'CREATE';\nvar O_EXCLUSIVE = 'EXCLUSIVE';\nvar O_TRUNCATE = 'TRUNCATE';\nvar O_APPEND = 'APPEND';\nvar XATTR_CREATE = 'CREATE';\nvar XATTR_REPLACE = 'REPLACE';\n\nmodule.exports = {\n  FILE_SYSTEM_NAME: 'local',\n\n  FILE_STORE_NAME: 'files',\n\n  IDB_RO: 'readonly',\n  IDB_RW: 'readwrite',\n\n  WSQL_VERSION: \"1\",\n  WSQL_SIZE: 5 * 1024 * 1024,\n  WSQL_DESC: \"FileSystem Storage\",\n\n  NODE_TYPE_FILE: 'FILE',\n  NODE_TYPE_DIRECTORY: 'DIRECTORY',\n  NODE_TYPE_SYMBOLIC_LINK: 'SYMLINK',\n  NODE_TYPE_META: 'META',\n\n  S_IFREG: 0x8000,\n  S_IFDIR: 0x4000,\n  S_IFLNK: 0xA000,\n\n  DEFAULT_DIR_PERMISSIONS: 0x1ED, // 755\n  DEFAULT_FILE_PERMISSIONS: 0x1A4, // 644\n  FULL_READ_WRITE_EXEC_PERMISSIONS: 0x1FF, // 777\n  READ_WRITE_PERMISSIONS: 0x1B6, /// 666\n  \n  SYMLOOP_MAX: 10,\n\n  BINARY_MIME_TYPE: 'application/octet-stream',\n  JSON_MIME_TYPE: 'application/json',\n\n  ROOT_DIRECTORY_NAME: '/', // basename(normalize(path))\n\n  // FS Mount Flags\n  FS_FORMAT: 'FORMAT',\n  FS_NOCTIME: 'NOCTIME',\n  FS_NOMTIME: 'NOMTIME',\n  FS_NODUPEIDCHECK: 'FS_NODUPEIDCHECK',\n\n  // FS File Open Flags\n  O_READ: O_READ,\n  O_WRITE: O_WRITE,\n  O_CREATE: O_CREATE,\n  O_EXCLUSIVE: O_EXCLUSIVE,\n  O_TRUNCATE: O_TRUNCATE,\n  O_APPEND: O_APPEND,\n\n  O_FLAGS: {\n    'r': [O_READ],\n    'r+': [O_READ, O_WRITE],\n    'w': [O_WRITE, O_CREATE, O_TRUNCATE],\n    'w+': [O_WRITE, O_READ, O_CREATE, O_TRUNCATE],\n    'wx': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],\n    'wx+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_TRUNCATE],\n    'a': [O_WRITE, O_CREATE, O_APPEND],\n    'a+': [O_WRITE, O_READ, O_CREATE, O_APPEND],\n    'ax': [O_WRITE, O_CREATE, O_EXCLUSIVE, O_APPEND],\n    'ax+': [O_WRITE, O_READ, O_CREATE, O_EXCLUSIVE, O_APPEND]\n  },\n\n  XATTR_CREATE: XATTR_CREATE,\n  XATTR_REPLACE: XATTR_REPLACE,\n\n  FS_READY: 'READY',\n  FS_PENDING: 'PENDING',\n  FS_ERROR: 'ERROR',\n\n  SUPER_NODE_ID: '00000000-0000-0000-0000-000000000000',\n\n  // Reserved File Descriptors for streams\n  STDIN: 0,\n  STDOUT: 1,\n  STDERR: 2,\n  FIRST_DESCRIPTOR: 3,\n\n  ENVIRONMENT: {\n    TMP: '/tmp',\n    PATH: ''\n  },\n\n  // Duplicate Node's fs.constants\n  fsConstants: {\n    O_RDONLY: 0,\n    O_WRONLY: 1,\n    O_RDWR: 2,\n    S_IFMT: 61440,\n    S_IFREG: 32768,\n    S_IFDIR: 16384,\n    S_IFCHR: 8192,\n    S_IFBLK: 24576,\n    S_IFIFO: 4096,\n    S_IFLNK: 40960,\n    S_IFSOCK: 49152,\n    O_CREAT: 512,\n    O_EXCL: 2048,\n    O_NOCTTY: 131072,\n    O_TRUNC: 1024,\n    O_APPEND: 8,\n    O_DIRECTORY: 1048576,\n    O_NOFOLLOW: 256,\n    O_SYNC: 128,\n    O_DSYNC: 4194304,\n    O_SYMLINK: 2097152,\n    O_NONBLOCK: 4,\n    S_IRWXU: 448,\n    S_IRUSR: 256,\n    S_IWUSR: 128,\n    S_IXUSR: 64,\n    S_IRWXG: 56,\n    S_IRGRP: 32,\n    S_IWGRP: 16,\n    S_IXGRP: 8,\n    S_IRWXO: 7,\n    S_IROTH: 4,\n    S_IWOTH: 2,\n    S_IXOTH: 1,\n    F_OK: 0,\n    R_OK: 4,\n    W_OK: 2,\n    X_OK: 1,\n    UV_FS_COPYFILE_EXCL: 1,\n    COPYFILE_EXCL: 1\n  }\n};\n","var errors = {};\n[\n  /**\n   * node.js errors - we only use some of these, add as needed.\n   */\n  //'-1:UNKNOWN:unknown error',\n  //'0:OK:success',\n  //'1:EOF:end of file',\n  //'2:EADDRINFO:getaddrinfo error',\n  //'3:EACCES:permission denied',\n  //'4:EAGAIN:resource temporarily unavailable',\n  //'5:EADDRINUSE:address already in use',\n  //'6:EADDRNOTAVAIL:address not available',\n  //'7:EAFNOSUPPORT:address family not supported',\n  //'8:EALREADY:connection already in progress',\n  '9:EBADF:bad file descriptor',\n  '10:EBUSY:resource busy or locked',\n  //'11:ECONNABORTED:software caused connection abort',\n  //'12:ECONNREFUSED:connection refused',\n  //'13:ECONNRESET:connection reset by peer',\n  //'14:EDESTADDRREQ:destination address required',\n  //'15:EFAULT:bad address in system call argument',\n  //'16:EHOSTUNREACH:host is unreachable',\n  //'17:EINTR:interrupted system call',\n  '18:EINVAL:invalid argument',\n  //'19:EISCONN:socket is already connected',\n  //'20:EMFILE:too many open files',\n  //'21:EMSGSIZE:message too long',\n  //'22:ENETDOWN:network is down',\n  //'23:ENETUNREACH:network is unreachable',\n  //'24:ENFILE:file table overflow',\n  //'25:ENOBUFS:no buffer space available',\n  //'26:ENOMEM:not enough memory',\n  '27:ENOTDIR:not a directory',\n  '28:EISDIR:illegal operation on a directory',\n  //'29:ENONET:machine is not on the network',\n  // errno 30 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js\n  //'31:ENOTCONN:socket is not connected',\n  //'32:ENOTSOCK:socket operation on non-socket',\n  //'33:ENOTSUP:operation not supported on socket',\n  '34:ENOENT:no such file or directory',\n  //'35:ENOSYS:function not implemented',\n  //'36:EPIPE:broken pipe',\n  //'37:EPROTO:protocol error',\n  //'38:EPROTONOSUPPORT:protocol not supported',\n  //'39:EPROTOTYPE:protocol wrong type for socket',\n  //'40:ETIMEDOUT:connection timed out',\n  //'41:ECHARSET:invalid Unicode character',\n  //'42:EAIFAMNOSUPPORT:address family for hostname not supported',\n  // errno 43 skipped, as per https://github.com/rvagg/node-errno/blob/master/errno.js\n  //'44:EAISERVICE:servname not supported for ai_socktype',\n  //'45:EAISOCKTYPE:ai_socktype not supported',\n  //'46:ESHUTDOWN:cannot send after transport endpoint shutdown',\n  '47:EEXIST:file already exists',\n  //'48:ESRCH:no such process',\n  //'49:ENAMETOOLONG:name too long',\n  '50:EPERM:operation not permitted',\n  '51:ELOOP:too many symbolic links encountered',\n  //'52:EXDEV:cross-device link not permitted',\n  '53:ENOTEMPTY:directory not empty',\n  //'54:ENOSPC:no space left on device',\n  '55:EIO:i/o error',\n  //'56:EROFS:read-only file system',\n  //'57:ENODEV:no such device',\n  //'58:ESPIPE:invalid seek',\n  //'59:ECANCELED:operation canceled',\n\n  /**\n   * Filer specific errors\n   */\n  '1000:ENOTMOUNTED:not mounted',\n  '1001:EFILESYSTEMERROR:missing super node, use \\'FORMAT\\' flag to format filesystem.',\n  '1002:ENOATTR:attribute does not exist'\n\n].forEach(function(e) {\n  e = e.split(':');\n  var errno = +e[0];\n  var errName = e[1];\n  var defaultMessage = e[2];\n\n  function FilerError(msg, path) {\n    Error.call(this);\n\n    this.name = errName;\n    this.code = errName;\n    this.errno = errno;\n    this.message = msg || defaultMessage;\n    if(path) {\n      this.path = path;\n    }\n    this.stack = (new Error(this.message)).stack;\n  }\n  FilerError.prototype = Object.create(Error.prototype);\n  FilerError.prototype.constructor = FilerError;\n  FilerError.prototype.toString = function() {\n    var pathInfo = this.path ? (', \\'' + this.path + '\\'') : '';\n    return this.name + ': ' + this.message + pathInfo;\n  };\n\n  // We expose the error as both Errors.EINVAL and Errors[18]\n  errors[errName] = errors[errno] = FilerError;\n});\n\nmodule.exports = errors;\n","'use strict'\n\nexports.byteLength = byteLength\nexports.toByteArray = toByteArray\nexports.fromByteArray = fromByteArray\n\nvar lookup = []\nvar revLookup = []\nvar Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array\n\nvar code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'\nfor (var i = 0, len = code.length; i < len; ++i) {\n  lookup[i] = code[i]\n  revLookup[code.charCodeAt(i)] = i\n}\n\n// Support decoding URL-safe base64 strings, as Node.js does.\n// See: https://en.wikipedia.org/wiki/Base64#URL_applications\nrevLookup['-'.charCodeAt(0)] = 62\nrevLookup['_'.charCodeAt(0)] = 63\n\nfunction getLens (b64) {\n  var len = b64.length\n\n  if (len % 4 > 0) {\n    throw new Error('Invalid string. Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  for (var i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(\n      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)\n    ))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};\n","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; ++i) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n\nfunction isnan (val) {\n  return val !== val // eslint-disable-line no-self-compare\n}\n","function FilerBuffer (subject, encoding, nonZero) {\n\n  // Automatically turn ArrayBuffer into Uint8Array so that underlying\n  // Buffer code doesn't just throw away and ignore ArrayBuffer data.\n  if (subject instanceof ArrayBuffer) {\n    subject = new Uint8Array(subject);\n  }\n\n  return new Buffer(subject, encoding, nonZero);\n};\n\n// Inherit prototype from Buffer\nFilerBuffer.prototype = Object.create(Buffer.prototype);\nFilerBuffer.prototype.constructor = FilerBuffer;\n\n// Also copy static methods onto FilerBuffer ctor\nObject.keys(Buffer).forEach(function (p) {\n  if (Buffer.hasOwnProperty(p)) {\n    FilerBuffer[p] = Buffer[p];\n  }\n});\n\nmodule.exports = FilerBuffer;\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\nvar FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;\nvar IDB_RW = require('../constants.js').IDB_RW;\nvar IDB_RO = require('../constants.js').IDB_RO;\nvar Errors = require('../errors.js');\nvar FilerBuffer = require('../buffer.js');\n\nvar indexedDB = global.indexedDB       ||\n                global.mozIndexedDB    ||\n                global.webkitIndexedDB ||\n                global.msIndexedDB;\n\nfunction IndexedDBContext(db, mode) {\n  this.db = db;\n  this.mode = mode;\n}\n\nIndexedDBContext.prototype._getObjectStore = function() {\n  if(this.objectStore) {\n    return this.objectStore;\n  }\n\n  var transaction = this.db.transaction(FILE_STORE_NAME, this.mode);\n  this.objectStore = transaction.objectStore(FILE_STORE_NAME);\n  return this.objectStore;\n};\n\nIndexedDBContext.prototype.clear = function(callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.clear();\n    request.onsuccess = function() {\n      callback();\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\nIndexedDBContext.prototype._get = function(key, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.get(key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\nIndexedDBContext.prototype.getObject = function(key, callback) {\n  this._get(key, callback);\n};\nIndexedDBContext.prototype.getBuffer = function(key, callback) {\n  this._get(key, function(err, arrayBuffer) {\n    if(err) {\n      return callback(err);\n    }\n    callback(null, new FilerBuffer(arrayBuffer));\n  });\n};\n\nIndexedDBContext.prototype._put = function(key, value, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.put(value, key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\nIndexedDBContext.prototype.putObject = function(key, value, callback) {\n  this._put(key, value, callback);\n};\nIndexedDBContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {\n  var buf = uint8BackedBuffer.buffer;\n  this._put(key, buf, callback);\n};\n\nIndexedDBContext.prototype.delete = function(key, callback) {\n  try {\n    var objectStore = this._getObjectStore();\n    var request = objectStore.delete(key);\n    request.onsuccess = function onsuccess(event) {\n      var result = event.target.result;\n      callback(null, result);\n    };\n    request.onerror = function(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\n\nfunction IndexedDB(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n  this.db = null;\n}\nIndexedDB.isSupported = function() {\n  return !!indexedDB;\n};\n\nIndexedDB.prototype.open = function(callback) {\n  var that = this;\n\n  // Bail if we already have a db open\n  if(that.db) {\n    return callback();\n  }\n\n  try {\n    // NOTE: we're not using versioned databases.\n    var openRequest = indexedDB.open(that.name);\n\n    // If the db doesn't exist, we'll create it\n    openRequest.onupgradeneeded = function onupgradeneeded(event) {\n      var db = event.target.result;\n\n      if(db.objectStoreNames.contains(FILE_STORE_NAME)) {\n        db.deleteObjectStore(FILE_STORE_NAME);\n      }\n      db.createObjectStore(FILE_STORE_NAME);\n    };\n\n    openRequest.onsuccess = function onsuccess(event) {\n      that.db = event.target.result;\n      callback();\n    };\n    openRequest.onerror = function onerror(event) {\n      event.preventDefault();\n      callback(event.error);\n    };\n  } catch(err) {\n    callback(err);\n  }\n};\n\nIndexedDB.prototype.getReadOnlyContext = function() {\n  return new IndexedDBContext(this.db, IDB_RO);\n};\nIndexedDB.prototype.getReadWriteContext = function() {\n  return new IndexedDBContext(this.db, IDB_RW);\n};\n\nmodule.exports = IndexedDB;\n","/*\n * base64-arraybuffer\n * https://github.com/niklasvh/base64-arraybuffer\n *\n * Copyright (c) 2012 Niklas von Hertzen\n * Licensed under the MIT license.\n */\n(function(){\n  \"use strict\";\n\n  var chars = \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/\";\n\n  // Use a lookup table to find the index.\n  var lookup = new Uint8Array(256);\n  for (var i = 0; i < chars.length; i++) {\n    lookup[chars.charCodeAt(i)] = i;\n  }\n\n  exports.encode = function(arraybuffer) {\n    var bytes = new Uint8Array(arraybuffer),\n    i, len = bytes.length, base64 = \"\";\n\n    for (i = 0; i < len; i+=3) {\n      base64 += chars[bytes[i] >> 2];\n      base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];\n      base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];\n      base64 += chars[bytes[i + 2] & 63];\n    }\n\n    if ((len % 3) === 2) {\n      base64 = base64.substring(0, base64.length - 1) + \"=\";\n    } else if (len % 3 === 1) {\n      base64 = base64.substring(0, base64.length - 2) + \"==\";\n    }\n\n    return base64;\n  };\n\n  exports.decode =  function(base64) {\n    var bufferLength = base64.length * 0.75,\n    len = base64.length, i, p = 0,\n    encoded1, encoded2, encoded3, encoded4;\n\n    if (base64[base64.length - 1] === \"=\") {\n      bufferLength--;\n      if (base64[base64.length - 2] === \"=\") {\n        bufferLength--;\n      }\n    }\n\n    var arraybuffer = new ArrayBuffer(bufferLength),\n    bytes = new Uint8Array(arraybuffer);\n\n    for (i = 0; i < len; i+=4) {\n      encoded1 = lookup[base64.charCodeAt(i)];\n      encoded2 = lookup[base64.charCodeAt(i+1)];\n      encoded3 = lookup[base64.charCodeAt(i+2)];\n      encoded4 = lookup[base64.charCodeAt(i+3)];\n\n      bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);\n      bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);\n      bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);\n    }\n\n    return arraybuffer;\n  };\n})();\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\nvar FILE_STORE_NAME = require('../constants.js').FILE_STORE_NAME;\nvar WSQL_VERSION = require('../constants.js').WSQL_VERSION;\nvar WSQL_SIZE = require('../constants.js').WSQL_SIZE;\nvar WSQL_DESC = require('../constants.js').WSQL_DESC;\nvar Errors = require('../errors.js');\nvar FilerBuffer = require('../buffer.js');\nvar base64ArrayBuffer = require('base64-arraybuffer');\n\nfunction WebSQLContext(db, isReadOnly) {\n  var that = this;\n  this.getTransaction = function(callback) {\n    if(that.transaction) {\n      callback(that.transaction);\n      return;\n    }\n    // Either do readTransaction() (read-only) or transaction() (read/write)\n    db[isReadOnly ? 'readTransaction' : 'transaction'](function(transaction) {\n      that.transaction = transaction;\n      callback(transaction);\n    });\n  };\n}\n\nWebSQLContext.prototype.clear = function(callback) {\n  function onError(transaction, error) {\n    callback(error);\n  }\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  this.getTransaction(function(transaction) {\n    transaction.executeSql(\"DELETE FROM \" + FILE_STORE_NAME + \";\",\n                           [], onSuccess, onError);\n  });\n};\n\nfunction _get(getTransaction, key, callback) {\n  function onSuccess(transaction, result) {\n    // If the key isn't found, return null\n    var value = result.rows.length === 0 ? null : result.rows.item(0).data;\n    callback(null, value);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  getTransaction(function(transaction) {\n    transaction.executeSql(\"SELECT data FROM \" + FILE_STORE_NAME + \" WHERE id = ? LIMIT 1;\",\n                           [key], onSuccess, onError);\n  });\n}\nWebSQLContext.prototype.getObject = function(key, callback) {\n  _get(this.getTransaction, key, function(err, result) {\n    if(err) {\n      return callback(err);\n    }\n\n    try {\n      if(result) {\n        result = JSON.parse(result);\n      }\n    } catch(e) {\n      return callback(e);\n    }\n\n    callback(null, result);\n  });\n};\nWebSQLContext.prototype.getBuffer = function(key, callback) {\n  _get(this.getTransaction, key, function(err, result) {\n    if(err) {\n      return callback(err);\n    }\n\n    // Deal with zero-length ArrayBuffers, which will be encoded as ''\n    if(result || result === '') {\n      var arrayBuffer = base64ArrayBuffer.decode(result);\n      result = new FilerBuffer(arrayBuffer);\n    }\n\n    callback(null, result);\n  });\n};\n\nfunction _put(getTransaction, key, value, callback) {\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  getTransaction(function(transaction) {\n    transaction.executeSql(\"INSERT OR REPLACE INTO \" + FILE_STORE_NAME + \" (id, data) VALUES (?, ?);\",\n                           [key, value], onSuccess, onError);\n  });\n}\nWebSQLContext.prototype.putObject = function(key, value, callback) {\n  var json = JSON.stringify(value);\n  _put(this.getTransaction, key, json, callback);\n};\nWebSQLContext.prototype.putBuffer = function(key, uint8BackedBuffer, callback) {\n  var base64 = base64ArrayBuffer.encode(uint8BackedBuffer.buffer);\n  _put(this.getTransaction, key, base64, callback);\n};\n\nWebSQLContext.prototype.delete = function(key, callback) {\n  function onSuccess(transaction, result) {\n    callback(null);\n  }\n  function onError(transaction, error) {\n    callback(error);\n  }\n  this.getTransaction(function(transaction) {\n    transaction.executeSql(\"DELETE FROM \" + FILE_STORE_NAME + \" WHERE id = ?;\",\n                           [key], onSuccess, onError);\n  });\n};\n\n\nfunction WebSQL(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n  this.db = null;\n}\nWebSQL.isSupported = function() {\n  return !!global.openDatabase;\n};\n\nWebSQL.prototype.open = function(callback) {\n  var that = this;\n\n  // Bail if we already have a db open\n  if(that.db) {\n    return callback();\n  }\n\n  var db = global.openDatabase(that.name, WSQL_VERSION, WSQL_DESC, WSQL_SIZE);\n  if(!db) {\n    callback(\"[WebSQL] Unable to open database.\");\n    return;\n  }\n\n  function onError(transaction, error) {\n    if (error.code === 5) {\n      callback(new Errors.EINVAL('WebSQL cannot be accessed. If private browsing is enabled, disable it.'));\n    }\n    callback(error);\n  }\n  function onSuccess(transaction, result) {\n    that.db = db;\n    callback();\n  }\n\n  // Create the table and index we'll need to store the fs data.\n  db.transaction(function(transaction) {\n    function createIndex(transaction) {\n      transaction.executeSql(\"CREATE INDEX IF NOT EXISTS idx_\" + FILE_STORE_NAME + \"_id\" +\n                             \" on \" + FILE_STORE_NAME + \" (id);\",\n                             [], onSuccess, onError);\n    }\n    transaction.executeSql(\"CREATE TABLE IF NOT EXISTS \" + FILE_STORE_NAME + \" (id unique, data TEXT);\",\n                           [], createIndex, onError);\n  });\n};\nWebSQL.prototype.getReadOnlyContext = function() {\n  return new WebSQLContext(this.db, true);\n};\nWebSQL.prototype.getReadWriteContext = function() {\n  return new WebSQLContext(this.db, false);\n};\n\nmodule.exports = WebSQL;\n","// shim for using process in browser\nvar process = module.exports = {};\n\n// cached from whatever global is present so that test runners that stub it\n// don't break things.  But we need to wrap it in a try catch in case it is\n// wrapped in strict mode code which doesn't define any globals.  It's inside a\n// function because try/catches deoptimize in certain engines.\n\nvar cachedSetTimeout;\nvar cachedClearTimeout;\n\nfunction defaultSetTimout() {\n    throw new Error('setTimeout has not been defined');\n}\nfunction defaultClearTimeout () {\n    throw new Error('clearTimeout has not been defined');\n}\n(function () {\n    try {\n        if (typeof setTimeout === 'function') {\n            cachedSetTimeout = setTimeout;\n        } else {\n            cachedSetTimeout = defaultSetTimout;\n        }\n    } catch (e) {\n        cachedSetTimeout = defaultSetTimout;\n    }\n    try {\n        if (typeof clearTimeout === 'function') {\n            cachedClearTimeout = clearTimeout;\n        } else {\n            cachedClearTimeout = defaultClearTimeout;\n        }\n    } catch (e) {\n        cachedClearTimeout = defaultClearTimeout;\n    }\n} ())\nfunction runTimeout(fun) {\n    if (cachedSetTimeout === setTimeout) {\n        //normal enviroments in sane situations\n        return setTimeout(fun, 0);\n    }\n    // if setTimeout wasn't available but was latter defined\n    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {\n        cachedSetTimeout = setTimeout;\n        return setTimeout(fun, 0);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedSetTimeout(fun, 0);\n    } catch(e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally\n            return cachedSetTimeout.call(null, fun, 0);\n        } catch(e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error\n            return cachedSetTimeout.call(this, fun, 0);\n        }\n    }\n\n\n}\nfunction runClearTimeout(marker) {\n    if (cachedClearTimeout === clearTimeout) {\n        //normal enviroments in sane situations\n        return clearTimeout(marker);\n    }\n    // if clearTimeout wasn't available but was latter defined\n    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {\n        cachedClearTimeout = clearTimeout;\n        return clearTimeout(marker);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedClearTimeout(marker);\n    } catch (e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally\n            return cachedClearTimeout.call(null, marker);\n        } catch (e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.\n            // Some versions of I.E. have different rules for clearTimeout vs setTimeout\n            return cachedClearTimeout.call(this, marker);\n        }\n    }\n\n\n\n}\nvar queue = [];\nvar draining = false;\nvar currentQueue;\nvar queueIndex = -1;\n\nfunction cleanUpNextTick() {\n    if (!draining || !currentQueue) {\n        return;\n    }\n    draining = false;\n    if (currentQueue.length) {\n        queue = currentQueue.concat(queue);\n    } else {\n        queueIndex = -1;\n    }\n    if (queue.length) {\n        drainQueue();\n    }\n}\n\nfunction drainQueue() {\n    if (draining) {\n        return;\n    }\n    var timeout = runTimeout(cleanUpNextTick);\n    draining = true;\n\n    var len = queue.length;\n    while(len) {\n        currentQueue = queue;\n        queue = [];\n        while (++queueIndex < len) {\n            if (currentQueue) {\n                currentQueue[queueIndex].run();\n            }\n        }\n        queueIndex = -1;\n        len = queue.length;\n    }\n    currentQueue = null;\n    draining = false;\n    runClearTimeout(timeout);\n}\n\nprocess.nextTick = function (fun) {\n    var args = new Array(arguments.length - 1);\n    if (arguments.length > 1) {\n        for (var i = 1; i < arguments.length; i++) {\n            args[i - 1] = arguments[i];\n        }\n    }\n    queue.push(new Item(fun, args));\n    if (queue.length === 1 && !draining) {\n        runTimeout(drainQueue);\n    }\n};\n\n// v8 likes predictible objects\nfunction Item(fun, array) {\n    this.fun = fun;\n    this.array = array;\n}\nItem.prototype.run = function () {\n    this.fun.apply(null, this.array);\n};\nprocess.title = 'browser';\nprocess.browser = true;\nprocess.env = {};\nprocess.argv = [];\nprocess.version = ''; // empty string to avoid regexp issues\nprocess.versions = {};\n\nfunction noop() {}\n\nprocess.on = noop;\nprocess.addListener = noop;\nprocess.once = noop;\nprocess.off = noop;\nprocess.removeListener = noop;\nprocess.removeAllListeners = noop;\nprocess.emit = noop;\nprocess.prependListener = noop;\nprocess.prependOnceListener = noop;\n\nprocess.listeners = function (name) { return [] }\n\nprocess.binding = function (name) {\n    throw new Error('process.binding is not supported');\n};\n\nprocess.cwd = function () { return '/' };\nprocess.chdir = function (dir) {\n    throw new Error('process.chdir is not supported');\n};\nprocess.umask = function() { return 0; };\n","/*global setImmediate: false, setTimeout: false, console: false */\n\n/**\n * async.js shim, based on https://raw.github.com/caolan/async/master/lib/async.js Feb 18, 2014\n * Used under MIT - https://github.com/caolan/async/blob/master/LICENSE\n */\n\n(function () {\n\n    var async = {};\n\n    // async.js functions used in Filer\n\n    //// nextTick implementation with browser-compatible fallback ////\n    if (typeof process === 'undefined' || !(process.nextTick)) {\n        if (typeof setImmediate === 'function') {\n            async.nextTick = function (fn) {\n                // not a direct alias for IE10 compatibility\n                setImmediate(fn);\n            };\n            async.setImmediate = async.nextTick;\n        }\n        else {\n            async.nextTick = function (fn) {\n                setTimeout(fn, 0);\n            };\n            async.setImmediate = async.nextTick;\n        }\n    }\n    else {\n        async.nextTick = process.nextTick;\n        if (typeof setImmediate !== 'undefined') {\n            async.setImmediate = function (fn) {\n              // not a direct alias for IE10 compatibility\n              setImmediate(fn);\n            };\n        }\n        else {\n            async.setImmediate = async.nextTick;\n        }\n    }\n\n    async.eachSeries = function (arr, iterator, callback) {\n        callback = callback || function () {};\n        if (!arr.length) {\n            return callback();\n        }\n        var completed = 0;\n        var iterate = function () {\n            iterator(arr[completed], function (err) {\n                if (err) {\n                    callback(err);\n                    callback = function () {};\n                }\n                else {\n                    completed += 1;\n                    if (completed >= arr.length) {\n                        callback();\n                    }\n                    else {\n                        iterate();\n                    }\n                }\n            });\n        };\n        iterate();\n    };\n    async.forEachSeries = async.eachSeries;\n\n    // AMD / RequireJS\n    if (typeof define !== 'undefined' && define.amd) {\n        define([], function () {\n            return async;\n        });\n    }\n    // Node.js\n    else if (typeof module !== 'undefined' && module.exports) {\n        module.exports = async;\n    }\n    // included directly via <script> tag\n    else {\n        root.async = async;\n    }\n\n}());\n","var FILE_SYSTEM_NAME = require('../constants.js').FILE_SYSTEM_NAME;\n// NOTE: prefer setImmediate to nextTick for proper recursion yielding.\n// see https://github.com/js-platform/filer/pull/24\nvar asyncCallback = require('../../lib/async.js').setImmediate;\n\n/**\n * Make shared in-memory DBs possible when using the same name.\n */\nvar createDB = (function() {\n  var pool = {};\n  return function getOrCreate(name) {\n    if(!pool.hasOwnProperty(name)) {\n      pool[name] = {};\n    }\n    return pool[name];\n  };\n}());\n\nfunction MemoryContext(db, readOnly) {\n  this.readOnly = readOnly;\n  this.objectStore = db;\n}\n\nMemoryContext.prototype.clear = function(callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  var objectStore = this.objectStore;\n  Object.keys(objectStore).forEach(function(key){\n    delete objectStore[key];\n  });\n  asyncCallback(callback);\n};\n\n// Memory context doesn't care about differences between Object and Buffer\nMemoryContext.prototype.getObject =\nMemoryContext.prototype.getBuffer =\nfunction(key, callback) {\n  var that = this;\n  asyncCallback(function() {\n    callback(null, that.objectStore[key]);\n  });\n};\nMemoryContext.prototype.putObject =\nMemoryContext.prototype.putBuffer =\nfunction(key, value, callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  this.objectStore[key] = value;\n  asyncCallback(callback);\n};\n\nMemoryContext.prototype.delete = function(key, callback) {\n  if(this.readOnly) {\n    asyncCallback(function() {\n      callback(\"[MemoryContext] Error: write operation on read only context\");\n    });\n    return;\n  }\n  delete this.objectStore[key];\n  asyncCallback(callback);\n};\n\n\nfunction Memory(name) {\n  this.name = name || FILE_SYSTEM_NAME;\n}\nMemory.isSupported = function() {\n  return true;\n};\n\nMemory.prototype.open = function(callback) {\n  this.db = createDB(this.name);\n  asyncCallback(callback);\n};\nMemory.prototype.getReadOnlyContext = function() {\n  return new MemoryContext(this.db, true);\n};\nMemory.prototype.getReadWriteContext = function() {\n  return new MemoryContext(this.db, false);\n};\n\nmodule.exports = Memory;\n","var IndexedDB = require('./indexeddb.js');\nvar WebSQL = require('./websql.js');\nvar Memory = require('./memory.js');\n\nmodule.exports = {\n  IndexedDB: IndexedDB,\n  WebSQL: WebSQL,\n  Memory: Memory,\n\n  /**\n   * Convenience Provider references\n   */\n\n  // The default provider to use when none is specified\n  Default: IndexedDB,\n\n  // The Fallback provider does automatic fallback checks\n  Fallback: (function() {\n    if(IndexedDB.isSupported()) {\n      return IndexedDB;\n    }\n\n    if(WebSQL.isSupported()) {\n      return WebSQL;\n    }\n\n    function NotSupported() {\n      throw \"[Filer Error] Your browser doesn't support IndexedDB or WebSQL.\";\n    }\n    NotSupported.isSupported = function() {\n      return false;\n    };\n    return NotSupported;\n  }())\n};\n","var defaults = require('../constants.js').ENVIRONMENT;\n\nmodule.exports = function Environment(env) {\n  env = env || {};\n  env.TMP = env.TMP || defaults.TMP;\n  env.PATH = env.PATH || defaults.PATH;\n\n  this.get = function(name) {\n    return env[name];\n  };\n\n  this.set = function(name, value) {\n    env[name] = value;\n  };\n};\n","// Adapt encodings to work with Buffer or Uint8Array, they expect the latter\nfunction decode(buf) {\n  return buf.toString('utf8');\n}\n\nfunction encode(string) {\n  return new Buffer(string, 'utf8');\n}\n\nmodule.exports = {\n  encode: encode,\n  decode: decode\n};\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// resolves . and .. elements in a path array with directory names there\n// must be no slashes, empty elements, or device names (c:\\) in the array\n// (so also no leading and trailing slashes - it does not distinguish\n// relative and absolute paths)\nfunction normalizeArray(parts, allowAboveRoot) {\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = parts.length - 1; i >= 0; i--) {\n    var last = parts[i];\n    if (last === '.') {\n      parts.splice(i, 1);\n    } else if (last === '..') {\n      parts.splice(i, 1);\n      up++;\n    } else if (up) {\n      parts.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (allowAboveRoot) {\n    for (; up--; up) {\n      parts.unshift('..');\n    }\n  }\n\n  return parts;\n}\n\n// Split a filename into [root, dir, basename, ext], unix version\n// 'root' is just a slash, or nothing.\nvar splitPathRe =\n    /^(\\/?|)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?|)(\\.[^.\\/]*|))(?:[\\/]*)$/;\nvar splitPath = function(filename) {\n  return splitPathRe.exec(filename).slice(1);\n};\n\n// path.resolve([from ...], to)\n// posix version\nexports.resolve = function() {\n  var resolvedPath = '',\n      resolvedAbsolute = false;\n\n  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {\n    var path = (i >= 0) ? arguments[i] : process.cwd();\n\n    // Skip empty and invalid entries\n    if (typeof path !== 'string') {\n      throw new TypeError('Arguments to path.resolve must be strings');\n    } else if (!path) {\n      continue;\n    }\n\n    resolvedPath = path + '/' + resolvedPath;\n    resolvedAbsolute = path.charAt(0) === '/';\n  }\n\n  // At this point the path should be resolved to a full absolute path, but\n  // handle relative paths to be safe (might happen when process.cwd() fails)\n\n  // Normalize the path\n  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {\n    return !!p;\n  }), !resolvedAbsolute).join('/');\n\n  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';\n};\n\n// path.normalize(path)\n// posix version\nexports.normalize = function(path) {\n  var isAbsolute = exports.isAbsolute(path),\n      trailingSlash = substr(path, -1) === '/';\n\n  // Normalize the path\n  path = normalizeArray(filter(path.split('/'), function(p) {\n    return !!p;\n  }), !isAbsolute).join('/');\n\n  if (!path && !isAbsolute) {\n    path = '.';\n  }\n  if (path && trailingSlash) {\n    path += '/';\n  }\n\n  return (isAbsolute ? '/' : '') + path;\n};\n\n// posix version\nexports.isAbsolute = function(path) {\n  return path.charAt(0) === '/';\n};\n\n// posix version\nexports.join = function() {\n  var paths = Array.prototype.slice.call(arguments, 0);\n  return exports.normalize(filter(paths, function(p, index) {\n    if (typeof p !== 'string') {\n      throw new TypeError('Arguments to path.join must be strings');\n    }\n    return p;\n  }).join('/'));\n};\n\n\n// path.relative(from, to)\n// posix version\nexports.relative = function(from, to) {\n  from = exports.resolve(from).substr(1);\n  to = exports.resolve(to).substr(1);\n\n  function trim(arr) {\n    var start = 0;\n    for (; start < arr.length; start++) {\n      if (arr[start] !== '') break;\n    }\n\n    var end = arr.length - 1;\n    for (; end >= 0; end--) {\n      if (arr[end] !== '') break;\n    }\n\n    if (start > end) return [];\n    return arr.slice(start, end - start + 1);\n  }\n\n  var fromParts = trim(from.split('/'));\n  var toParts = trim(to.split('/'));\n\n  var length = Math.min(fromParts.length, toParts.length);\n  var samePartsLength = length;\n  for (var i = 0; i < length; i++) {\n    if (fromParts[i] !== toParts[i]) {\n      samePartsLength = i;\n      break;\n    }\n  }\n\n  var outputParts = [];\n  for (var i = samePartsLength; i < fromParts.length; i++) {\n    outputParts.push('..');\n  }\n\n  outputParts = outputParts.concat(toParts.slice(samePartsLength));\n\n  return outputParts.join('/');\n};\n\nexports.sep = '/';\nexports.delimiter = ':';\n\nexports.dirname = function(path) {\n  var result = splitPath(path),\n      root = result[0],\n      dir = result[1];\n\n  if (!root && !dir) {\n    // No dirname whatsoever\n    return '.';\n  }\n\n  if (dir) {\n    // It has a dirname, strip trailing slash\n    dir = dir.substr(0, dir.length - 1);\n  }\n\n  return root + dir;\n};\n\n\nexports.basename = function(path, ext) {\n  var f = splitPath(path)[2];\n  // TODO: make this comparison case-insensitive on windows?\n  if (ext && f.substr(-1 * ext.length) === ext) {\n    f = f.substr(0, f.length - ext.length);\n  }\n  return f;\n};\n\n\nexports.extname = function(path) {\n  return splitPath(path)[3];\n};\n\nfunction filter (xs, f) {\n    if (xs.filter) return xs.filter(f);\n    var res = [];\n    for (var i = 0; i < xs.length; i++) {\n        if (f(xs[i], i, xs)) res.push(xs[i]);\n    }\n    return res;\n}\n\n// String.prototype.substr - negative index don't work in IE8\nvar substr = 'ab'.substr(-1) === 'b'\n    ? function (str, start, len) { return str.substr(start, len) }\n    : function (str, start, len) {\n        if (start < 0) start = str.length + start;\n        return str.substr(start, len);\n    }\n;\n","module.exports = function (xs, fn) {\n    var res = [];\n    for (var i = 0; i < xs.length; i++) {\n        var x = fn(xs[i], i);\n        if (isArray(x)) res.push.apply(res, x);\n        else res.push(x);\n    }\n    return res;\n};\n\nvar isArray = Array.isArray || function (xs) {\n    return Object.prototype.toString.call(xs) === '[object Array]';\n};\n","'use strict';\nmodule.exports = balanced;\nfunction balanced(a, b, str) {\n  if (a instanceof RegExp) a = maybeMatch(a, str);\n  if (b instanceof RegExp) b = maybeMatch(b, str);\n\n  var r = range(a, b, str);\n\n  return r && {\n    start: r[0],\n    end: r[1],\n    pre: str.slice(0, r[0]),\n    body: str.slice(r[0] + a.length, r[1]),\n    post: str.slice(r[1] + b.length)\n  };\n}\n\nfunction maybeMatch(reg, str) {\n  var m = str.match(reg);\n  return m ? m[0] : null;\n}\n\nbalanced.range = range;\nfunction range(a, b, str) {\n  var begs, beg, left, right, result;\n  var ai = str.indexOf(a);\n  var bi = str.indexOf(b, ai + 1);\n  var i = ai;\n\n  if (ai >= 0 && bi > 0) {\n    begs = [];\n    left = str.length;\n\n    while (i >= 0 && !result) {\n      if (i == ai) {\n        begs.push(i);\n        ai = str.indexOf(a, i + 1);\n      } else if (begs.length == 1) {\n        result = [ begs.pop(), bi ];\n      } else {\n        beg = begs.pop();\n        if (beg < left) {\n          left = beg;\n          right = bi;\n        }\n\n        bi = str.indexOf(b, i + 1);\n      }\n\n      i = ai < bi && ai >= 0 ? ai : bi;\n    }\n\n    if (begs.length) {\n      result = [ left, right ];\n    }\n  }\n\n  return result;\n}\n","var concatMap = require('concat-map');\nvar balanced = require('balanced-match');\n\nmodule.exports = expandTop;\n\nvar escSlash = '\\0SLASH'+Math.random()+'\\0';\nvar escOpen = '\\0OPEN'+Math.random()+'\\0';\nvar escClose = '\\0CLOSE'+Math.random()+'\\0';\nvar escComma = '\\0COMMA'+Math.random()+'\\0';\nvar escPeriod = '\\0PERIOD'+Math.random()+'\\0';\n\nfunction numeric(str) {\n  return parseInt(str, 10) == str\n    ? parseInt(str, 10)\n    : str.charCodeAt(0);\n}\n\nfunction escapeBraces(str) {\n  return str.split('\\\\\\\\').join(escSlash)\n            .split('\\\\{').join(escOpen)\n            .split('\\\\}').join(escClose)\n            .split('\\\\,').join(escComma)\n            .split('\\\\.').join(escPeriod);\n}\n\nfunction unescapeBraces(str) {\n  return str.split(escSlash).join('\\\\')\n            .split(escOpen).join('{')\n            .split(escClose).join('}')\n            .split(escComma).join(',')\n            .split(escPeriod).join('.');\n}\n\n\n// Basically just str.split(\",\"), but handling cases\n// where we have nested braced sections, which should be\n// treated as individual members, like {a,{b,c},d}\nfunction parseCommaParts(str) {\n  if (!str)\n    return [''];\n\n  var parts = [];\n  var m = balanced('{', '}', str);\n\n  if (!m)\n    return str.split(',');\n\n  var pre = m.pre;\n  var body = m.body;\n  var post = m.post;\n  var p = pre.split(',');\n\n  p[p.length-1] += '{' + body + '}';\n  var postParts = parseCommaParts(post);\n  if (post.length) {\n    p[p.length-1] += postParts.shift();\n    p.push.apply(p, postParts);\n  }\n\n  parts.push.apply(parts, p);\n\n  return parts;\n}\n\nfunction expandTop(str) {\n  if (!str)\n    return [];\n\n  // I don't know why Bash 4.3 does this, but it does.\n  // Anything starting with {} will have the first two bytes preserved\n  // but *only* at the top level, so {},a}b will not expand to anything,\n  // but a{},b}c will be expanded to [a}c,abc].\n  // One could argue that this is a bug in Bash, but since the goal of\n  // this module is to match Bash's rules, we escape a leading {}\n  if (str.substr(0, 2) === '{}') {\n    str = '\\\\{\\\\}' + str.substr(2);\n  }\n\n  return expand(escapeBraces(str), true).map(unescapeBraces);\n}\n\nfunction identity(e) {\n  return e;\n}\n\nfunction embrace(str) {\n  return '{' + str + '}';\n}\nfunction isPadded(el) {\n  return /^-?0\\d/.test(el);\n}\n\nfunction lte(i, y) {\n  return i <= y;\n}\nfunction gte(i, y) {\n  return i >= y;\n}\n\nfunction expand(str, isTop) {\n  var expansions = [];\n\n  var m = balanced('{', '}', str);\n  if (!m || /\\$$/.test(m.pre)) return [str];\n\n  var isNumericSequence = /^-?\\d+\\.\\.-?\\d+(?:\\.\\.-?\\d+)?$/.test(m.body);\n  var isAlphaSequence = /^[a-zA-Z]\\.\\.[a-zA-Z](?:\\.\\.-?\\d+)?$/.test(m.body);\n  var isSequence = isNumericSequence || isAlphaSequence;\n  var isOptions = m.body.indexOf(',') >= 0;\n  if (!isSequence && !isOptions) {\n    // {a},b}\n    if (m.post.match(/,.*\\}/)) {\n      str = m.pre + '{' + m.body + escClose + m.post;\n      return expand(str);\n    }\n    return [str];\n  }\n\n  var n;\n  if (isSequence) {\n    n = m.body.split(/\\.\\./);\n  } else {\n    n = parseCommaParts(m.body);\n    if (n.length === 1) {\n      // x{{a,b}}y ==> x{a}y x{b}y\n      n = expand(n[0], false).map(embrace);\n      if (n.length === 1) {\n        var post = m.post.length\n          ? expand(m.post, false)\n          : [''];\n        return post.map(function(p) {\n          return m.pre + n[0] + p;\n        });\n      }\n    }\n  }\n\n  // at this point, n is the parts, and we know it's not a comma set\n  // with a single entry.\n\n  // no need to expand pre, since it is guaranteed to be free of brace-sets\n  var pre = m.pre;\n  var post = m.post.length\n    ? expand(m.post, false)\n    : [''];\n\n  var N;\n\n  if (isSequence) {\n    var x = numeric(n[0]);\n    var y = numeric(n[1]);\n    var width = Math.max(n[0].length, n[1].length)\n    var incr = n.length == 3\n      ? Math.abs(numeric(n[2]))\n      : 1;\n    var test = lte;\n    var reverse = y < x;\n    if (reverse) {\n      incr *= -1;\n      test = gte;\n    }\n    var pad = n.some(isPadded);\n\n    N = [];\n\n    for (var i = x; test(i, y); i += incr) {\n      var c;\n      if (isAlphaSequence) {\n        c = String.fromCharCode(i);\n        if (c === '\\\\')\n          c = '';\n      } else {\n        c = String(i);\n        if (pad) {\n          var need = width - c.length;\n          if (need > 0) {\n            var z = new Array(need + 1).join('0');\n            if (i < 0)\n              c = '-' + z + c.slice(1);\n            else\n              c = z + c;\n          }\n        }\n      }\n      N.push(c);\n    }\n  } else {\n    N = concatMap(n, function(el) { return expand(el, false) });\n  }\n\n  for (var j = 0; j < N.length; j++) {\n    for (var k = 0; k < post.length; k++) {\n      var expansion = pre + N[j] + post[k];\n      if (!isTop || isSequence || expansion)\n        expansions.push(expansion);\n    }\n  }\n\n  return expansions;\n}\n\n","module.exports = minimatch\nminimatch.Minimatch = Minimatch\n\nvar path = { sep: '/' }\ntry {\n  path = require('path')\n} catch (er) {}\n\nvar GLOBSTAR = minimatch.GLOBSTAR = Minimatch.GLOBSTAR = {}\nvar expand = require('brace-expansion')\n\nvar plTypes = {\n  '!': { open: '(?:(?!(?:', close: '))[^/]*?)'},\n  '?': { open: '(?:', close: ')?' },\n  '+': { open: '(?:', close: ')+' },\n  '*': { open: '(?:', close: ')*' },\n  '@': { open: '(?:', close: ')' }\n}\n\n// any single thing other than /\n// don't need to escape / when using new RegExp()\nvar qmark = '[^/]'\n\n// * => any number of characters\nvar star = qmark + '*?'\n\n// ** when dots are allowed.  Anything goes, except .. and .\n// not (^ or / followed by one or two dots followed by $ or /),\n// followed by anything, any number of times.\nvar twoStarDot = '(?:(?!(?:\\\\\\/|^)(?:\\\\.{1,2})($|\\\\\\/)).)*?'\n\n// not a ^ or / followed by a dot,\n// followed by anything, any number of times.\nvar twoStarNoDot = '(?:(?!(?:\\\\\\/|^)\\\\.).)*?'\n\n// characters that need to be escaped in RegExp.\nvar reSpecials = charSet('().*{}+?[]^$\\\\!')\n\n// \"abc\" -> { a:true, b:true, c:true }\nfunction charSet (s) {\n  return s.split('').reduce(function (set, c) {\n    set[c] = true\n    return set\n  }, {})\n}\n\n// normalizes slashes.\nvar slashSplit = /\\/+/\n\nminimatch.filter = filter\nfunction filter (pattern, options) {\n  options = options || {}\n  return function (p, i, list) {\n    return minimatch(p, pattern, options)\n  }\n}\n\nfunction ext (a, b) {\n  a = a || {}\n  b = b || {}\n  var t = {}\n  Object.keys(b).forEach(function (k) {\n    t[k] = b[k]\n  })\n  Object.keys(a).forEach(function (k) {\n    t[k] = a[k]\n  })\n  return t\n}\n\nminimatch.defaults = function (def) {\n  if (!def || !Object.keys(def).length) return minimatch\n\n  var orig = minimatch\n\n  var m = function minimatch (p, pattern, options) {\n    return orig.minimatch(p, pattern, ext(def, options))\n  }\n\n  m.Minimatch = function Minimatch (pattern, options) {\n    return new orig.Minimatch(pattern, ext(def, options))\n  }\n\n  return m\n}\n\nMinimatch.defaults = function (def) {\n  if (!def || !Object.keys(def).length) return Minimatch\n  return minimatch.defaults(def).Minimatch\n}\n\nfunction minimatch (p, pattern, options) {\n  if (typeof pattern !== 'string') {\n    throw new TypeError('glob pattern string required')\n  }\n\n  if (!options) options = {}\n\n  // shortcut: comments match nothing.\n  if (!options.nocomment && pattern.charAt(0) === '#') {\n    return false\n  }\n\n  // \"\" only matches \"\"\n  if (pattern.trim() === '') return p === ''\n\n  return new Minimatch(pattern, options).match(p)\n}\n\nfunction Minimatch (pattern, options) {\n  if (!(this instanceof Minimatch)) {\n    return new Minimatch(pattern, options)\n  }\n\n  if (typeof pattern !== 'string') {\n    throw new TypeError('glob pattern string required')\n  }\n\n  if (!options) options = {}\n  pattern = pattern.trim()\n\n  // windows support: need to use /, not \\\n  if (path.sep !== '/') {\n    pattern = pattern.split(path.sep).join('/')\n  }\n\n  this.options = options\n  this.set = []\n  this.pattern = pattern\n  this.regexp = null\n  this.negate = false\n  this.comment = false\n  this.empty = false\n\n  // make the set of regexps etc.\n  this.make()\n}\n\nMinimatch.prototype.debug = function () {}\n\nMinimatch.prototype.make = make\nfunction make () {\n  // don't do it more than once.\n  if (this._made) return\n\n  var pattern = this.pattern\n  var options = this.options\n\n  // empty patterns and comments match nothing.\n  if (!options.nocomment && pattern.charAt(0) === '#') {\n    this.comment = true\n    return\n  }\n  if (!pattern) {\n    this.empty = true\n    return\n  }\n\n  // step 1: figure out negation, etc.\n  this.parseNegate()\n\n  // step 2: expand braces\n  var set = this.globSet = this.braceExpand()\n\n  if (options.debug) this.debug = console.error\n\n  this.debug(this.pattern, set)\n\n  // step 3: now we have a set, so turn each one into a series of path-portion\n  // matching patterns.\n  // These will be regexps, except in the case of \"**\", which is\n  // set to the GLOBSTAR object for globstar behavior,\n  // and will not contain any / characters\n  set = this.globParts = set.map(function (s) {\n    return s.split(slashSplit)\n  })\n\n  this.debug(this.pattern, set)\n\n  // glob --> regexps\n  set = set.map(function (s, si, set) {\n    return s.map(this.parse, this)\n  }, this)\n\n  this.debug(this.pattern, set)\n\n  // filter out everything that didn't compile properly.\n  set = set.filter(function (s) {\n    return s.indexOf(false) === -1\n  })\n\n  this.debug(this.pattern, set)\n\n  this.set = set\n}\n\nMinimatch.prototype.parseNegate = parseNegate\nfunction parseNegate () {\n  var pattern = this.pattern\n  var negate = false\n  var options = this.options\n  var negateOffset = 0\n\n  if (options.nonegate) return\n\n  for (var i = 0, l = pattern.length\n    ; i < l && pattern.charAt(i) === '!'\n    ; i++) {\n    negate = !negate\n    negateOffset++\n  }\n\n  if (negateOffset) this.pattern = pattern.substr(negateOffset)\n  this.negate = negate\n}\n\n// Brace expansion:\n// a{b,c}d -> abd acd\n// a{b,}c -> abc ac\n// a{0..3}d -> a0d a1d a2d a3d\n// a{b,c{d,e}f}g -> abg acdfg acefg\n// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg\n//\n// Invalid sets are not expanded.\n// a{2..}b -> a{2..}b\n// a{b}c -> a{b}c\nminimatch.braceExpand = function (pattern, options) {\n  return braceExpand(pattern, options)\n}\n\nMinimatch.prototype.braceExpand = braceExpand\n\nfunction braceExpand (pattern, options) {\n  if (!options) {\n    if (this instanceof Minimatch) {\n      options = this.options\n    } else {\n      options = {}\n    }\n  }\n\n  pattern = typeof pattern === 'undefined'\n    ? this.pattern : pattern\n\n  if (typeof pattern === 'undefined') {\n    throw new TypeError('undefined pattern')\n  }\n\n  if (options.nobrace ||\n    !pattern.match(/\\{.*\\}/)) {\n    // shortcut. no need to expand.\n    return [pattern]\n  }\n\n  return expand(pattern)\n}\n\n// parse a component of the expanded set.\n// At this point, no pattern may contain \"/\" in it\n// so we're going to return a 2d array, where each entry is the full\n// pattern, split on '/', and then turned into a regular expression.\n// A regexp is made at the end which joins each array with an\n// escaped /, and another full one which joins each regexp with |.\n//\n// Following the lead of Bash 4.1, note that \"**\" only has special meaning\n// when it is the *only* thing in a path portion.  Otherwise, any series\n// of * is equivalent to a single *.  Globstar behavior is enabled by\n// default, and can be disabled by setting options.noglobstar.\nMinimatch.prototype.parse = parse\nvar SUBPARSE = {}\nfunction parse (pattern, isSub) {\n  if (pattern.length > 1024 * 64) {\n    throw new TypeError('pattern is too long')\n  }\n\n  var options = this.options\n\n  // shortcuts\n  if (!options.noglobstar && pattern === '**') return GLOBSTAR\n  if (pattern === '') return ''\n\n  var re = ''\n  var hasMagic = !!options.nocase\n  var escaping = false\n  // ? => one single character\n  var patternListStack = []\n  var negativeLists = []\n  var stateChar\n  var inClass = false\n  var reClassStart = -1\n  var classStart = -1\n  // . and .. never match anything that doesn't start with .,\n  // even when options.dot is set.\n  var patternStart = pattern.charAt(0) === '.' ? '' // anything\n  // not (start or / followed by . or .. followed by / or end)\n  : options.dot ? '(?!(?:^|\\\\\\/)\\\\.{1,2}(?:$|\\\\\\/))'\n  : '(?!\\\\.)'\n  var self = this\n\n  function clearStateChar () {\n    if (stateChar) {\n      // we had some state-tracking character\n      // that wasn't consumed by this pass.\n      switch (stateChar) {\n        case '*':\n          re += star\n          hasMagic = true\n        break\n        case '?':\n          re += qmark\n          hasMagic = true\n        break\n        default:\n          re += '\\\\' + stateChar\n        break\n      }\n      self.debug('clearStateChar %j %j', stateChar, re)\n      stateChar = false\n    }\n  }\n\n  for (var i = 0, len = pattern.length, c\n    ; (i < len) && (c = pattern.charAt(i))\n    ; i++) {\n    this.debug('%s\\t%s %s %j', pattern, i, re, c)\n\n    // skip over any that are escaped.\n    if (escaping && reSpecials[c]) {\n      re += '\\\\' + c\n      escaping = false\n      continue\n    }\n\n    switch (c) {\n      case '/':\n        // completely not allowed, even escaped.\n        // Should already be path-split by now.\n        return false\n\n      case '\\\\':\n        clearStateChar()\n        escaping = true\n      continue\n\n      // the various stateChar values\n      // for the \"extglob\" stuff.\n      case '?':\n      case '*':\n      case '+':\n      case '@':\n      case '!':\n        this.debug('%s\\t%s %s %j <-- stateChar', pattern, i, re, c)\n\n        // all of those are literals inside a class, except that\n        // the glob [!a] means [^a] in regexp\n        if (inClass) {\n          this.debug('  in class')\n          if (c === '!' && i === classStart + 1) c = '^'\n          re += c\n          continue\n        }\n\n        // if we already have a stateChar, then it means\n        // that there was something like ** or +? in there.\n        // Handle the stateChar, then proceed with this one.\n        self.debug('call clearStateChar %j', stateChar)\n        clearStateChar()\n        stateChar = c\n        // if extglob is disabled, then +(asdf|foo) isn't a thing.\n        // just clear the statechar *now*, rather than even diving into\n        // the patternList stuff.\n        if (options.noext) clearStateChar()\n      continue\n\n      case '(':\n        if (inClass) {\n          re += '('\n          continue\n        }\n\n        if (!stateChar) {\n          re += '\\\\('\n          continue\n        }\n\n        patternListStack.push({\n          type: stateChar,\n          start: i - 1,\n          reStart: re.length,\n          open: plTypes[stateChar].open,\n          close: plTypes[stateChar].close\n        })\n        // negation is (?:(?!js)[^/]*)\n        re += stateChar === '!' ? '(?:(?!(?:' : '(?:'\n        this.debug('plType %j %j', stateChar, re)\n        stateChar = false\n      continue\n\n      case ')':\n        if (inClass || !patternListStack.length) {\n          re += '\\\\)'\n          continue\n        }\n\n        clearStateChar()\n        hasMagic = true\n        var pl = patternListStack.pop()\n        // negation is (?:(?!js)[^/]*)\n        // The others are (?:<pattern>)<type>\n        re += pl.close\n        if (pl.type === '!') {\n          negativeLists.push(pl)\n        }\n        pl.reEnd = re.length\n      continue\n\n      case '|':\n        if (inClass || !patternListStack.length || escaping) {\n          re += '\\\\|'\n          escaping = false\n          continue\n        }\n\n        clearStateChar()\n        re += '|'\n      continue\n\n      // these are mostly the same in regexp and glob\n      case '[':\n        // swallow any state-tracking char before the [\n        clearStateChar()\n\n        if (inClass) {\n          re += '\\\\' + c\n          continue\n        }\n\n        inClass = true\n        classStart = i\n        reClassStart = re.length\n        re += c\n      continue\n\n      case ']':\n        //  a right bracket shall lose its special\n        //  meaning and represent itself in\n        //  a bracket expression if it occurs\n        //  first in the list.  -- POSIX.2 2.8.3.2\n        if (i === classStart + 1 || !inClass) {\n          re += '\\\\' + c\n          escaping = false\n          continue\n        }\n\n        // handle the case where we left a class open.\n        // \"[z-a]\" is valid, equivalent to \"\\[z-a\\]\"\n        if (inClass) {\n          // split where the last [ was, make sure we don't have\n          // an invalid re. if so, re-walk the contents of the\n          // would-be class to re-translate any characters that\n          // were passed through as-is\n          // TODO: It would probably be faster to determine this\n          // without a try/catch and a new RegExp, but it's tricky\n          // to do safely.  For now, this is safe and works.\n          var cs = pattern.substring(classStart + 1, i)\n          try {\n            RegExp('[' + cs + ']')\n          } catch (er) {\n            // not a valid class!\n            var sp = this.parse(cs, SUBPARSE)\n            re = re.substr(0, reClassStart) + '\\\\[' + sp[0] + '\\\\]'\n            hasMagic = hasMagic || sp[1]\n            inClass = false\n            continue\n          }\n        }\n\n        // finish up the class.\n        hasMagic = true\n        inClass = false\n        re += c\n      continue\n\n      default:\n        // swallow any state char that wasn't consumed\n        clearStateChar()\n\n        if (escaping) {\n          // no need\n          escaping = false\n        } else if (reSpecials[c]\n          && !(c === '^' && inClass)) {\n          re += '\\\\'\n        }\n\n        re += c\n\n    } // switch\n  } // for\n\n  // handle the case where we left a class open.\n  // \"[abc\" is valid, equivalent to \"\\[abc\"\n  if (inClass) {\n    // split where the last [ was, and escape it\n    // this is a huge pita.  We now have to re-walk\n    // the contents of the would-be class to re-translate\n    // any characters that were passed through as-is\n    cs = pattern.substr(classStart + 1)\n    sp = this.parse(cs, SUBPARSE)\n    re = re.substr(0, reClassStart) + '\\\\[' + sp[0]\n    hasMagic = hasMagic || sp[1]\n  }\n\n  // handle the case where we had a +( thing at the *end*\n  // of the pattern.\n  // each pattern list stack adds 3 chars, and we need to go through\n  // and escape any | chars that were passed through as-is for the regexp.\n  // Go through and escape them, taking care not to double-escape any\n  // | chars that were already escaped.\n  for (pl = patternListStack.pop(); pl; pl = patternListStack.pop()) {\n    var tail = re.slice(pl.reStart + pl.open.length)\n    this.debug('setting tail', re, pl)\n    // maybe some even number of \\, then maybe 1 \\, followed by a |\n    tail = tail.replace(/((?:\\\\{2}){0,64})(\\\\?)\\|/g, function (_, $1, $2) {\n      if (!$2) {\n        // the | isn't already escaped, so escape it.\n        $2 = '\\\\'\n      }\n\n      // need to escape all those slashes *again*, without escaping the\n      // one that we need for escaping the | character.  As it works out,\n      // escaping an even number of slashes can be done by simply repeating\n      // it exactly after itself.  That's why this trick works.\n      //\n      // I am sorry that you have to see this.\n      return $1 + $1 + $2 + '|'\n    })\n\n    this.debug('tail=%j\\n   %s', tail, tail, pl, re)\n    var t = pl.type === '*' ? star\n      : pl.type === '?' ? qmark\n      : '\\\\' + pl.type\n\n    hasMagic = true\n    re = re.slice(0, pl.reStart) + t + '\\\\(' + tail\n  }\n\n  // handle trailing things that only matter at the very end.\n  clearStateChar()\n  if (escaping) {\n    // trailing \\\\\n    re += '\\\\\\\\'\n  }\n\n  // only need to apply the nodot start if the re starts with\n  // something that could conceivably capture a dot\n  var addPatternStart = false\n  switch (re.charAt(0)) {\n    case '.':\n    case '[':\n    case '(': addPatternStart = true\n  }\n\n  // Hack to work around lack of negative lookbehind in JS\n  // A pattern like: *.!(x).!(y|z) needs to ensure that a name\n  // like 'a.xyz.yz' doesn't match.  So, the first negative\n  // lookahead, has to look ALL the way ahead, to the end of\n  // the pattern.\n  for (var n = negativeLists.length - 1; n > -1; n--) {\n    var nl = negativeLists[n]\n\n    var nlBefore = re.slice(0, nl.reStart)\n    var nlFirst = re.slice(nl.reStart, nl.reEnd - 8)\n    var nlLast = re.slice(nl.reEnd - 8, nl.reEnd)\n    var nlAfter = re.slice(nl.reEnd)\n\n    nlLast += nlAfter\n\n    // Handle nested stuff like *(*.js|!(*.json)), where open parens\n    // mean that we should *not* include the ) in the bit that is considered\n    // \"after\" the negated section.\n    var openParensBefore = nlBefore.split('(').length - 1\n    var cleanAfter = nlAfter\n    for (i = 0; i < openParensBefore; i++) {\n      cleanAfter = cleanAfter.replace(/\\)[+*?]?/, '')\n    }\n    nlAfter = cleanAfter\n\n    var dollar = ''\n    if (nlAfter === '' && isSub !== SUBPARSE) {\n      dollar = '$'\n    }\n    var newRe = nlBefore + nlFirst + nlAfter + dollar + nlLast\n    re = newRe\n  }\n\n  // if the re is not \"\" at this point, then we need to make sure\n  // it doesn't match against an empty path part.\n  // Otherwise a/* will match a/, which it should not.\n  if (re !== '' && hasMagic) {\n    re = '(?=.)' + re\n  }\n\n  if (addPatternStart) {\n    re = patternStart + re\n  }\n\n  // parsing just a piece of a larger pattern.\n  if (isSub === SUBPARSE) {\n    return [re, hasMagic]\n  }\n\n  // skip the regexp for non-magical patterns\n  // unescape anything in it, though, so that it'll be\n  // an exact match against a file etc.\n  if (!hasMagic) {\n    return globUnescape(pattern)\n  }\n\n  var flags = options.nocase ? 'i' : ''\n  try {\n    var regExp = new RegExp('^' + re + '$', flags)\n  } catch (er) {\n    // If it was an invalid regular expression, then it can't match\n    // anything.  This trick looks for a character after the end of\n    // the string, which is of course impossible, except in multi-line\n    // mode, but it's not a /m regex.\n    return new RegExp('$.')\n  }\n\n  regExp._glob = pattern\n  regExp._src = re\n\n  return regExp\n}\n\nminimatch.makeRe = function (pattern, options) {\n  return new Minimatch(pattern, options || {}).makeRe()\n}\n\nMinimatch.prototype.makeRe = makeRe\nfunction makeRe () {\n  if (this.regexp || this.regexp === false) return this.regexp\n\n  // at this point, this.set is a 2d array of partial\n  // pattern strings, or \"**\".\n  //\n  // It's better to use .match().  This function shouldn't\n  // be used, really, but it's pretty convenient sometimes,\n  // when you just want to work with a regex.\n  var set = this.set\n\n  if (!set.length) {\n    this.regexp = false\n    return this.regexp\n  }\n  var options = this.options\n\n  var twoStar = options.noglobstar ? star\n    : options.dot ? twoStarDot\n    : twoStarNoDot\n  var flags = options.nocase ? 'i' : ''\n\n  var re = set.map(function (pattern) {\n    return pattern.map(function (p) {\n      return (p === GLOBSTAR) ? twoStar\n      : (typeof p === 'string') ? regExpEscape(p)\n      : p._src\n    }).join('\\\\\\/')\n  }).join('|')\n\n  // must match entire pattern\n  // ending in a * or ** will make it less strict.\n  re = '^(?:' + re + ')$'\n\n  // can match anything, as long as it's not this.\n  if (this.negate) re = '^(?!' + re + ').*$'\n\n  try {\n    this.regexp = new RegExp(re, flags)\n  } catch (ex) {\n    this.regexp = false\n  }\n  return this.regexp\n}\n\nminimatch.match = function (list, pattern, options) {\n  options = options || {}\n  var mm = new Minimatch(pattern, options)\n  list = list.filter(function (f) {\n    return mm.match(f)\n  })\n  if (mm.options.nonull && !list.length) {\n    list.push(pattern)\n  }\n  return list\n}\n\nMinimatch.prototype.match = match\nfunction match (f, partial) {\n  this.debug('match', f, this.pattern)\n  // short-circuit in the case of busted things.\n  // comments, etc.\n  if (this.comment) return false\n  if (this.empty) return f === ''\n\n  if (f === '/' && partial) return true\n\n  var options = this.options\n\n  // windows: need to use /, not \\\n  if (path.sep !== '/') {\n    f = f.split(path.sep).join('/')\n  }\n\n  // treat the test path as a set of pathparts.\n  f = f.split(slashSplit)\n  this.debug(this.pattern, 'split', f)\n\n  // just ONE of the pattern sets in this.set needs to match\n  // in order for it to be valid.  If negating, then just one\n  // match means that we have failed.\n  // Either way, return on the first hit.\n\n  var set = this.set\n  this.debug(this.pattern, 'set', set)\n\n  // Find the basename of the path by looking for the last non-empty segment\n  var filename\n  var i\n  for (i = f.length - 1; i >= 0; i--) {\n    filename = f[i]\n    if (filename) break\n  }\n\n  for (i = 0; i < set.length; i++) {\n    var pattern = set[i]\n    var file = f\n    if (options.matchBase && pattern.length === 1) {\n      file = [filename]\n    }\n    var hit = this.matchOne(file, pattern, partial)\n    if (hit) {\n      if (options.flipNegate) return true\n      return !this.negate\n    }\n  }\n\n  // didn't get any hits.  this is success if it's a negative\n  // pattern, failure otherwise.\n  if (options.flipNegate) return false\n  return this.negate\n}\n\n// set partial to true to test if, for example,\n// \"/a/b\" matches the start of \"/*/b/*/d\"\n// Partial means, if you run out of file before you run\n// out of pattern, then that's fine, as long as all\n// the parts match.\nMinimatch.prototype.matchOne = function (file, pattern, partial) {\n  var options = this.options\n\n  this.debug('matchOne',\n    { 'this': this, file: file, pattern: pattern })\n\n  this.debug('matchOne', file.length, pattern.length)\n\n  for (var fi = 0,\n      pi = 0,\n      fl = file.length,\n      pl = pattern.length\n      ; (fi < fl) && (pi < pl)\n      ; fi++, pi++) {\n    this.debug('matchOne loop')\n    var p = pattern[pi]\n    var f = file[fi]\n\n    this.debug(pattern, p, f)\n\n    // should be impossible.\n    // some invalid regexp stuff in the set.\n    if (p === false) return false\n\n    if (p === GLOBSTAR) {\n      this.debug('GLOBSTAR', [pattern, p, f])\n\n      // \"**\"\n      // a/**/b/**/c would match the following:\n      // a/b/x/y/z/c\n      // a/x/y/z/b/c\n      // a/b/x/b/x/c\n      // a/b/c\n      // To do this, take the rest of the pattern after\n      // the **, and see if it would match the file remainder.\n      // If so, return success.\n      // If not, the ** \"swallows\" a segment, and try again.\n      // This is recursively awful.\n      //\n      // a/**/b/**/c matching a/b/x/y/z/c\n      // - a matches a\n      // - doublestar\n      //   - matchOne(b/x/y/z/c, b/**/c)\n      //     - b matches b\n      //     - doublestar\n      //       - matchOne(x/y/z/c, c) -> no\n      //       - matchOne(y/z/c, c) -> no\n      //       - matchOne(z/c, c) -> no\n      //       - matchOne(c, c) yes, hit\n      var fr = fi\n      var pr = pi + 1\n      if (pr === pl) {\n        this.debug('** at the end')\n        // a ** at the end will just swallow the rest.\n        // We have found a match.\n        // however, it will not swallow /.x, unless\n        // options.dot is set.\n        // . and .. are *never* matched by **, for explosively\n        // exponential reasons.\n        for (; fi < fl; fi++) {\n          if (file[fi] === '.' || file[fi] === '..' ||\n            (!options.dot && file[fi].charAt(0) === '.')) return false\n        }\n        return true\n      }\n\n      // ok, let's see if we can swallow whatever we can.\n      while (fr < fl) {\n        var swallowee = file[fr]\n\n        this.debug('\\nglobstar while', file, fr, pattern, pr, swallowee)\n\n        // XXX remove this slice.  Just pass the start index.\n        if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {\n          this.debug('globstar found match!', fr, fl, swallowee)\n          // found a match.\n          return true\n        } else {\n          // can't swallow \".\" or \"..\" ever.\n          // can only swallow \".foo\" when explicitly asked.\n          if (swallowee === '.' || swallowee === '..' ||\n            (!options.dot && swallowee.charAt(0) === '.')) {\n            this.debug('dot detected!', file, fr, pattern, pr)\n            break\n          }\n\n          // ** swallows a segment, and continue.\n          this.debug('globstar swallow a segment, and continue')\n          fr++\n        }\n      }\n\n      // no match was found.\n      // However, in partial mode, we can't say this is necessarily over.\n      // If there's more *pattern* left, then\n      if (partial) {\n        // ran out of file\n        this.debug('\\n>>> no match, partial?', file, fr, pattern, pr)\n        if (fr === fl) return true\n      }\n      return false\n    }\n\n    // something other than **\n    // non-magic patterns just have to match exactly\n    // patterns with magic have been turned into regexps.\n    var hit\n    if (typeof p === 'string') {\n      if (options.nocase) {\n        hit = f.toLowerCase() === p.toLowerCase()\n      } else {\n        hit = f === p\n      }\n      this.debug('string match', p, f, hit)\n    } else {\n      hit = f.match(p)\n      this.debug('pattern match', p, f, hit)\n    }\n\n    if (!hit) return false\n  }\n\n  // Note: ending in / means that we'll get a final \"\"\n  // at the end of the pattern.  This can only match a\n  // corresponding \"\" at the end of the file.\n  // If the file ends in /, then it can only match a\n  // a pattern that ends in /, unless the pattern just\n  // doesn't have any more for it. But, a/b/ should *not*\n  // match \"a/b/*\", even though \"\" matches against the\n  // [^/]*? pattern, except in partial mode, where it might\n  // simply not be reached yet.\n  // However, a/b/ should still satisfy a/*\n\n  // now either we fell off the end of the pattern, or we're done.\n  if (fi === fl && pi === pl) {\n    // ran out of pattern and filename at the same time.\n    // an exact hit!\n    return true\n  } else if (fi === fl) {\n    // ran out of file, but still had pattern left.\n    // this is ok if we're doing the match as part of\n    // a glob fs traversal.\n    return partial\n  } else if (pi === pl) {\n    // ran out of pattern, still have file left.\n    // this is only acceptable if we're on the very last\n    // empty segment of a file with a trailing slash.\n    // a/* should match a/b/\n    var emptyFileEnd = (fi === fl - 1) && (file[fi] === '')\n    return emptyFileEnd\n  }\n\n  // should be unreachable.\n  throw new Error('wtf?')\n}\n\n// replace stuff like \\* with *\nfunction globUnescape (s) {\n  return s.replace(/\\\\(.)/g, '$1')\n}\n\nfunction regExpEscape (s) {\n  return s.replace(/[-[\\]{}()*+?.,\\\\^$|#\\s]/g, '\\\\$&')\n}\n","var Path = require('../path.js');\nvar Errors = require('../errors.js');\nvar Environment = require('./environment.js');\nvar async = require('../../lib/async.js');\nvar Encoding = require('../encoding.js');\nvar minimatch = require('minimatch');\n\nfunction Shell(fs, options) {\n  options = options || {};\n\n  var env = new Environment(options.env);\n  var cwd = '/';\n\n  /**\n   * The bound FileSystem (cannot be changed)\n   */\n  Object.defineProperty(this, 'fs', {\n    get: function() { return fs; },\n    enumerable: true\n  });\n\n  /**\n   * The shell's environment (e.g., for things like\n   * path, tmp, and other env vars). Use env.get()\n   * and env.set() to work with variables.\n   */\n  Object.defineProperty(this, 'env', {\n    get: function() { return env; },\n    enumerable: true\n  });\n\n  /**\n   * Change the current working directory. We\n   * include `cd` on the `this` vs. proto so that\n   * we can access cwd without exposing it externally.\n   */\n  this.cd = function(path, callback) {\n    path = Path.resolve(cwd, path);\n    // Make sure the path actually exists, and is a dir\n    fs.stat(path, function(err, stats) {\n      if(err) {\n        callback(new Errors.ENOTDIR(null, path));\n        return;\n      }\n      if(stats.type === 'DIRECTORY') {\n        cwd = path;\n        callback();\n      } else {\n        callback(new Errors.ENOTDIR(null, path));\n      }\n    });\n  };\n\n  /**\n   * Get the current working directory (changed with `cd()`)\n   */\n  this.pwd = function() {\n    return cwd;\n  };\n}\n\n/**\n * Execute the .js command located at `path`. Such commands\n * should assume the existence of 3 arguments, which will be\n * defined at runtime:\n *\n *   * fs - the current shell's bound filesystem object\n *   * args - a list of arguments for the command, or an empty list if none\n *   * callback - a callback function(error, result) to call when done.\n *\n * The .js command's contents should be the body of a function\n * that looks like this:\n *\n * function(fs, args, callback) {\n *   // .js code here\n * }\n */\nShell.prototype.exec = function(path, args, callback) {\n  /* jshint evil:true */\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof args === 'function') {\n    callback = args;\n    args = [];\n  }\n  args = args || [];\n  callback = callback || function(){};\n  path = Path.resolve(sh.pwd(), path);\n\n  fs.readFile(path, \"utf8\", function(error, data) {\n    if(error) {\n      callback(error);\n      return;\n    }\n    try {\n      var cmd = new Function('fs', 'args', 'callback', data);\n      cmd(fs, args, callback);\n    } catch(e) {\n      callback(e);\n    }\n  });\n};\n\n/**\n * Create a file if it does not exist, or update access and\n * modified times if it does. Valid options include:\n *\n *  * updateOnly - whether to create the file if missing (defaults to false)\n *  * date - use the provided Date value instead of current date/time\n */\nShell.prototype.touch = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n  path = Path.resolve(sh.pwd(), path);\n\n  function createFile(path) {\n    fs.writeFile(path, '', callback);\n  }\n\n  function updateTimes(path) {\n    var now = Date.now();\n    var atime = options.date || now;\n    var mtime = options.date || now;\n\n    fs.utimes(path, atime, mtime, callback);\n  }\n\n  fs.stat(path, function(error, stats) {\n    if(error) {\n      if(options.updateOnly === true) {\n        callback();\n      } else {\n        createFile(path);\n      }\n    } else {\n      updateTimes(path);\n    }\n  });\n};\n\n/**\n * Concatenate multiple files into a single String, with each\n * file separated by a newline. The `files` argument should\n * be a String (path to single file) or an Array of Strings\n * (multiple file paths).\n */\nShell.prototype.cat = function(files, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  var all = '';\n  callback = callback || function(){};\n\n  if(!files) {\n    callback(new Errors.EINVAL('Missing files argument'));\n    return;\n  }\n\n  files = typeof files === 'string' ? [ files ] : files;\n\n  function append(item, callback) {\n    var filename = Path.resolve(sh.pwd(), item);\n    fs.readFile(filename, 'utf8', function(error, data) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      all += data + '\\n';\n      callback();\n    });\n  }\n\n  async.eachSeries(files, append, function(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, all.replace(/\\n$/, ''));\n    }\n  });\n};\n\n/**\n * Get the listing of a directory, returning an array of\n * file entries in the following form:\n *\n * {\n *   path: <String> the basename of the directory entry\n *   links: <Number> the number of links to the entry\n *   size: <Number> the size in bytes of the entry\n *   modified: <Number> the last modified date/time\n *   type: <String> the type of the entry\n *   contents: <Array> an optional array of child entries\n * }\n *\n * By default ls() gives a shallow listing. If you want\n * to follow directories as they are encountered, use\n * the `recursive=true` option.\n */\nShell.prototype.ls = function(dir, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  if(!dir) {\n    callback(new Errors.EINVAL('Missing dir argument'));\n    return;\n  }\n\n  function list(path, callback) {\n    var pathname = Path.resolve(sh.pwd(), path);\n    var result = [];\n\n    fs.readdir(pathname, function(error, entries) {\n      if(error) {\n        callback(error);\n        return;\n      }\n\n      function getDirEntry(name, callback) {\n        name = Path.join(pathname, name);\n        fs.stat(name, function(error, stats) {\n          if(error) {\n            callback(error);\n            return;\n          }\n          var entry = stats;\n\n          if(options.recursive && stats.type === 'DIRECTORY') {\n            list(Path.join(pathname, entry.name), function(error, items) {\n              if(error) {\n                callback(error);\n                return;\n              }\n              entry.contents = items;\n              result.push(entry);\n              callback();\n            });\n          } else {\n            result.push(entry);\n            callback();\n          }\n        });\n      }\n\n      async.eachSeries(entries, getDirEntry, function(error) {\n        callback(error, result);\n      });\n    });\n  }\n\n  list(dir, callback);\n};\n\n/**\n * Removes the file or directory at `path`. If `path` is a file\n * it will be removed. If `path` is a directory, it will be\n * removed if it is empty, otherwise the callback will receive\n * an error. In order to remove non-empty directories, use the\n * `recursive=true` option.\n */\nShell.prototype.rm = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n\n  function remove(pathname, callback) {\n    pathname = Path.resolve(sh.pwd(), pathname);\n    fs.stat(pathname, function(error, stats) {\n      if(error) {\n        callback(error);\n        return;\n      }\n\n      // If this is a file, delete it and we're done\n      if(stats.type === 'FILE') {\n        fs.unlink(pathname, callback);\n        return;\n      }\n\n      // If it's a dir, check if it's empty\n      fs.readdir(pathname, function(error, entries) {\n        if(error) {\n          callback(error);\n          return;\n        }\n\n        // If dir is empty, delete it and we're done\n        if(entries.length === 0) {\n          fs.rmdir(pathname, callback);\n          return;\n        }\n\n        // If not, see if we're allowed to delete recursively\n        if(!options.recursive) {\n          callback(new Errors.ENOTEMPTY(null, pathname));\n          return;\n        }\n\n        // Remove each dir entry recursively, then delete the dir.\n        entries = entries.map(function(filename) {\n          // Root dir entries absolutely\n          return Path.join(pathname, filename);\n        });\n        async.eachSeries(entries, remove, function(error) {\n          if(error) {\n            callback(error);\n            return;\n          }\n          fs.rmdir(pathname, callback);\n        });\n      });\n    });\n  }\n\n  remove(path, callback);\n};\n\n/**\n * Gets the path to the temporary directory, creating it if not\n * present. The directory used is the one specified in\n * env.TMP. The callback receives (error, tempDirName).\n */\nShell.prototype.tempDir = function(callback) {\n  var sh = this;\n  var fs = sh.fs;\n  var tmp = sh.env.get('TMP');\n  callback = callback || function(){};\n\n  // Try and create it, and it will either work or fail\n  // but either way it's now there.\n  fs.mkdir(tmp, function(err) {\n    callback(null, tmp);\n  });\n};\n\n/**\n * Recursively creates the directory at `path`. If the parent\n * of `path` does not exist, it will be created.\n * Based off EnsureDir by Sam X. Xu\n * https://www.npmjs.org/package/ensureDir\n * MIT License\n */\nShell.prototype.mkdirp = function(path, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  callback = callback || function(){};\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n  else if (path === '/') {\n    callback();\n    return;\n  }\n  function _mkdirp(path, callback) {\n    fs.stat(path, function (err, stat) {\n      if(stat) {\n        if(stat.isDirectory()) {\n          callback();\n          return;\n        }\n        else if (stat.isFile()) {\n          callback(new Errors.ENOTDIR(null, path));\n          return;\n        }\n      }\n      else if (err && err.code !== 'ENOENT') {\n        callback(err);\n        return;\n      }\n      else {\n        var parent = Path.dirname(path);\n        if(parent === '/') {\n          fs.mkdir(path, function (err) {\n            if (err && err.code != 'EEXIST') {\n              callback(err);\n              return;\n            }\n            callback();\n            return;\n          });\n        }\n        else {\n          _mkdirp(parent, function (err) {\n            if (err) return callback(err);\n            fs.mkdir(path, function (err) {\n              if (err && err.code != 'EEXIST') {\n                callback(err);\n                return;\n              }\n              callback();\n              return;\n            });\n          });\n        }\n      }\n    });\n  }\n\n  _mkdirp(path, callback);\n};\n\n/**\n * Recursively walk a directory tree, reporting back all paths\n * that were found along the way. The `path` must be a dir.\n * Valid options include a `regex` for pattern matching paths\n * and an `exec` function of the form `function(path, next)` where\n * `path` is the current path that was found (dir paths have an '/'\n * appended) and `next` is a callback to call when done processing\n * the current path, passing any error object back as the first argument.\n * `find` returns a flat array of absolute paths for all matching/found\n * paths as the final argument to the callback.\n */\n Shell.prototype.find = function(path, options, callback) {\n  var sh = this;\n  var fs = sh.fs;\n  if(typeof options === 'function') {\n    callback = options;\n    options = {};\n  }\n  options = options || {};\n  callback = callback || function(){};\n\n  var exec = options.exec || function(path, next) { next(); };\n  var found = [];\n\n  if(!path) {\n    callback(new Errors.EINVAL('Missing path argument'));\n    return;\n  }\n\n  function processPath(path, callback) {\n    exec(path, function(err) {\n      if(err) {\n        callback(err);\n        return;\n      }\n\n      found.push(path);\n      callback();\n    });\n  }\n\n  function maybeProcessPath(path, callback) {\n    // Test the path against the user's regex, name, path primaries (if any)\n    // and remove any trailing slashes added previously.\n    var rawPath = Path.removeTrailing(path);\n\n    // Check entire path against provided regex, if any\n    if(options.regex && !options.regex.test(rawPath)) {\n      callback();\n      return;\n    }\n\n    // Check basename for matches against name primary, if any\n    if(options.name && !minimatch(Path.basename(rawPath), options.name)) {\n      callback();\n      return;\n    }\n\n    // Check dirname for matches against path primary, if any\n    if(options.path && !minimatch(Path.dirname(rawPath), options.path)) {\n      callback();\n      return;\n    }\n\n    processPath(path, callback);\n  }\n\n  function walk(path, callback) {\n    path = Path.resolve(sh.pwd(), path);\n\n    // The path is either a file or dir, and instead of doing\n    // a stat() to determine it first, we just try to readdir()\n    // and it will either work or not, and we handle the non-dir error.\n    fs.readdir(path, function(err, entries) {\n      if(err) {\n        if(err.code === 'ENOTDIR' /* file case, ignore error */) {\n          maybeProcessPath(path, callback);\n        } else {\n          callback(err);\n        }\n        return;\n      }\n\n      // Path is really a dir, add a trailing / and report it found\n      maybeProcessPath(Path.addTrailing(path), function(err) {\n        if(err) {\n          callback(err);\n          return;\n        }\n\n        entries = entries.map(function(entry) {\n          return Path.join(path, entry);\n        });\n\n        async.eachSeries(entries, walk, function(err) {\n          callback(err, found);\n        });\n      });\n    });\n  }\n\n  // Make sure we are starting with a dir path\n  fs.stat(path, function(err, stats) {\n    if(err) {\n      callback(err);\n      return;\n    }\n    if(!stats.isDirectory()) {\n      callback(new Errors.ENOTDIR(null, path));\n      return;\n    }\n\n    walk(path, callback);\n  });\n};\n\nmodule.exports = Shell;\n","// Based on https://github.com/diy/intercom.js/blob/master/lib/events.js\n// Copyright 2012 DIY Co Apache License, Version 2.0\n// http://www.apache.org/licenses/LICENSE-2.0\n\nfunction removeItem(item, array) {\n  for (var i = array.length - 1; i >= 0; i--) {\n    if (array[i] === item) {\n      array.splice(i, 1);\n    }\n  }\n  return array;\n}\n\nvar EventEmitter = function() {};\n\nEventEmitter.createInterface = function(space) {\n  var methods = {};\n\n  methods.on = function(name, fn) {\n    if (typeof this[space] === 'undefined') {\n      this[space] = {};\n    }\n    if (!this[space].hasOwnProperty(name)) {\n      this[space][name] = [];\n    }\n    this[space][name].push(fn);\n  };\n\n  methods.off = function(name, fn) {\n    if (typeof this[space] === 'undefined') return;\n    if (this[space].hasOwnProperty(name)) {\n      removeItem(fn, this[space][name]);\n    }\n  };\n\n  methods.trigger = function(name) {\n    if (typeof this[space] !== 'undefined' && this[space].hasOwnProperty(name)) {\n      var args = Array.prototype.slice.call(arguments, 1);\n      for (var i = 0; i < this[space][name].length; i++) {\n        this[space][name][i].apply(this[space][name][i], args);\n      }\n    }\n  };\n\n  methods.removeAllListeners = function(name) {\n    if (typeof this[space] === 'undefined') return;\n    var self = this;\n    self[space][name].forEach(function(fn) {\n      self.off(name, fn);\n    });\n  };\n\n  return methods;\n};\n\nvar pvt = EventEmitter.createInterface('_handlers');\nEventEmitter.prototype._on = pvt.on;\nEventEmitter.prototype._off = pvt.off;\nEventEmitter.prototype._trigger = pvt.trigger;\n\nvar pub = EventEmitter.createInterface('handlers');\nEventEmitter.prototype.on = function() {\n  pub.on.apply(this, arguments);\n  Array.prototype.unshift.call(arguments, 'on');\n  this._trigger.apply(this, arguments);\n};\nEventEmitter.prototype.off = pub.off;\nEventEmitter.prototype.trigger = pub.trigger;\nEventEmitter.prototype.removeAllListeners = pub.removeAllListeners;\n\nmodule.exports = EventEmitter;\n","// Based on https://github.com/diy/intercom.js/blob/master/lib/intercom.js\n// Copyright 2012 DIY Co Apache License, Version 2.0\n// http://www.apache.org/licenses/LICENSE-2.0\n\nvar EventEmitter = require('./eventemitter.js');\nvar guid = require('../src/shared.js').guid;\n\nfunction throttle(delay, fn) {\n  var last = 0;\n  return function() {\n    var now = Date.now();\n    if (now - last > delay) {\n      last = now;\n      fn.apply(this, arguments);\n    }\n  };\n}\n\nfunction extend(a, b) {\n  if (typeof a === 'undefined' || !a) { a = {}; }\n  if (typeof b === 'object') {\n    for (var key in b) {\n      if (b.hasOwnProperty(key)) {\n        a[key] = b[key];\n      }\n    }\n  }\n  return a;\n}\n\nvar localStorage = (function(window) {\n  if (typeof window === 'undefined' ||\n      typeof window.localStorage === 'undefined') {\n    return {\n      getItem : function() {},\n      setItem : function() {},\n      removeItem : function() {}\n    };\n  }\n  return window.localStorage;\n}(global));\n\nfunction Intercom() {\n  var self = this;\n  var now = Date.now();\n\n  this.origin         = guid();\n  this.lastMessage    = now;\n  this.receivedIDs    = {};\n  this.previousValues = {};\n\n  var storageHandler = function() {\n    self._onStorageEvent.apply(self, arguments);\n  };\n\n  // If we're in node.js, skip event registration\n  if (typeof document === 'undefined') {\n    return;\n  }\n\n  if (document.attachEvent) {\n    document.attachEvent('onstorage', storageHandler);\n  } else {\n    global.addEventListener('storage', storageHandler, false);\n  }\n}\n\nIntercom.prototype._transaction = function(fn) {\n  var TIMEOUT   = 1000;\n  var WAIT      = 20;\n  var self      = this;\n  var executed  = false;\n  var listening = false;\n  var waitTimer = null;\n\n  function lock() {\n    if (executed) {\n      return;\n    }\n\n    var now = Date.now();\n    var activeLock = localStorage.getItem(INDEX_LOCK)|0;\n    if (activeLock && now - activeLock < TIMEOUT) {\n      if (!listening) {\n        self._on('storage', lock);\n        listening = true;\n      }\n      waitTimer = setTimeout(lock, WAIT);\n      return;\n    }\n    executed = true;\n    localStorage.setItem(INDEX_LOCK, now);\n\n    fn();\n    unlock();\n  }\n\n  function unlock() {\n    if (listening) {\n      self._off('storage', lock);\n    }\n    if (waitTimer) {\n      clearTimeout(waitTimer);\n    }\n    localStorage.removeItem(INDEX_LOCK);\n  }\n\n  lock();\n};\n\nIntercom.prototype._cleanup_emit = throttle(100, function() {\n  var self = this;\n\n  self._transaction(function() {\n    var now = Date.now();\n    var threshold = now - THRESHOLD_TTL_EMIT;\n    var changed = 0;\n    var messages;\n\n    try {\n      messages = JSON.parse(localStorage.getItem(INDEX_EMIT) || '[]');\n    } catch(e) {\n      messages = [];\n    }\n    for (var i = messages.length - 1; i >= 0; i--) {\n      if (messages[i].timestamp < threshold) {\n        messages.splice(i, 1);\n        changed++;\n      }\n    }\n    if (changed > 0) {\n      localStorage.setItem(INDEX_EMIT, JSON.stringify(messages));\n    }\n  });\n});\n\nIntercom.prototype._cleanup_once = throttle(100, function() {\n  var self = this;\n\n  self._transaction(function() {\n    var timestamp, ttl, key;\n    var table;\n    var now  = Date.now();\n    var changed = 0;\n\n    try {\n      table = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');\n    } catch(e) {\n      table = {};\n    }\n    for (key in table) {\n      if (self._once_expired(key, table)) {\n        delete table[key];\n        changed++;\n      }\n    }\n\n    if (changed > 0) {\n      localStorage.setItem(INDEX_ONCE, JSON.stringify(table));\n    }\n  });\n});\n\nIntercom.prototype._once_expired = function(key, table) {\n  if (!table) {\n    return true;\n  }\n  if (!table.hasOwnProperty(key)) {\n    return true;\n  }\n  if (typeof table[key] !== 'object') {\n    return true;\n  }\n\n  var ttl = table[key].ttl || THRESHOLD_TTL_ONCE;\n  var now = Date.now();\n  var timestamp = table[key].timestamp;\n  return timestamp < now - ttl;\n};\n\nIntercom.prototype._localStorageChanged = function(event, field) {\n  if (event && event.key) {\n    return event.key === field;\n  }\n\n  var currentValue = localStorage.getItem(field);\n  if (currentValue === this.previousValues[field]) {\n    return false;\n  }\n  this.previousValues[field] = currentValue;\n  return true;\n};\n\nIntercom.prototype._onStorageEvent = function(event) {\n  event = event || global.event;\n  var self = this;\n\n  if (this._localStorageChanged(event, INDEX_EMIT)) {\n    this._transaction(function() {\n      var now = Date.now();\n      var data = localStorage.getItem(INDEX_EMIT);\n      var messages;\n\n      try {\n        messages = JSON.parse(data || '[]');\n      } catch(e) {\n        messages = [];\n      }\n      for (var i = 0; i < messages.length; i++) {\n        if (messages[i].origin === self.origin) continue;\n        if (messages[i].timestamp < self.lastMessage) continue;\n        if (messages[i].id) {\n          if (self.receivedIDs.hasOwnProperty(messages[i].id)) continue;\n          self.receivedIDs[messages[i].id] = true;\n        }\n        self.trigger(messages[i].name, messages[i].payload);\n      }\n      self.lastMessage = now;\n    });\n  }\n\n  this._trigger('storage', event);\n};\n\nIntercom.prototype._emit = function(name, message, id) {\n  id = (typeof id === 'string' || typeof id === 'number') ? String(id) : null;\n  if (id && id.length) {\n    if (this.receivedIDs.hasOwnProperty(id)) return;\n    this.receivedIDs[id] = true;\n  }\n\n  var packet = {\n    id        : id,\n    name      : name,\n    origin    : this.origin,\n    timestamp : Date.now(),\n    payload   : message\n  };\n\n  var self = this;\n  this._transaction(function() {\n    var data = localStorage.getItem(INDEX_EMIT) || '[]';\n    var delimiter = (data === '[]') ? '' : ',';\n    data = [data.substring(0, data.length - 1), delimiter, JSON.stringify(packet), ']'].join('');\n    localStorage.setItem(INDEX_EMIT, data);\n    self.trigger(name, message);\n\n    setTimeout(function() {\n      self._cleanup_emit();\n    }, 50);\n  });\n};\n\nIntercom.prototype.emit = function(name, message) {\n  this._emit.apply(this, arguments);\n  this._trigger('emit', name, message);\n};\n\nIntercom.prototype.once = function(key, fn, ttl) {\n  if (!Intercom.supported) {\n    return;\n  }\n\n  var self = this;\n  this._transaction(function() {\n    var data;\n    try {\n      data = JSON.parse(localStorage.getItem(INDEX_ONCE) || '{}');\n    } catch(e) {\n      data = {};\n    }\n    if (!self._once_expired(key, data)) {\n      return;\n    }\n\n    data[key] = {};\n    data[key].timestamp = Date.now();\n    if (typeof ttl === 'number') {\n      data[key].ttl = ttl * 1000;\n    }\n\n    localStorage.setItem(INDEX_ONCE, JSON.stringify(data));\n    fn();\n\n    setTimeout(function() {\n      self._cleanup_once();\n    }, 50);\n  });\n};\n\nextend(Intercom.prototype, EventEmitter.prototype);\n\nIntercom.supported = (typeof localStorage !== 'undefined');\n\nvar INDEX_EMIT = 'intercom';\nvar INDEX_ONCE = 'intercom_once';\nvar INDEX_LOCK = 'intercom_lock';\n\nvar THRESHOLD_TTL_EMIT = 50000;\nvar THRESHOLD_TTL_ONCE = 1000 * 3600;\n\nIntercom.destroy = function() {\n  localStorage.removeItem(INDEX_LOCK);\n  localStorage.removeItem(INDEX_EMIT);\n  localStorage.removeItem(INDEX_ONCE);\n};\n\nIntercom.getInstance = (function() {\n  var intercom;\n  return function() {\n    if (!intercom) {\n      intercom = new Intercom();\n    }\n    return intercom;\n  };\n})();\n\nmodule.exports = Intercom;\n","var EventEmitter = require('../lib/eventemitter.js');\nvar Path = require('./path.js');\nvar Intercom = require('../lib/intercom.js');\n\n/**\n * FSWatcher based on node.js' FSWatcher\n * see https://github.com/joyent/node/blob/master/lib/fs.js\n */\nfunction FSWatcher() {\n  EventEmitter.call(this);\n  var self = this;\n  var recursive = false;\n  var recursivePathPrefix;\n  var filename;\n\n  function onchange(path) {\n    // Watch for exact filename, or parent path when recursive is true.\n    if(filename === path || (recursive && path.indexOf(recursivePathPrefix) === 0)) {\n      self.trigger('change', 'change', path);\n    }\n  }\n\n  // We support, but ignore the second arg, which node.js uses.\n  self.start = function(filename_, persistent_, recursive_) {\n    // Bail if we've already started (and therefore have a filename);\n    if(filename) {\n      return;\n    }\n\n    if(Path.isNull(filename_)) {\n      throw new Error('Path must be a string without null bytes.');\n    }\n\n    // TODO: get realpath for symlinks on filename...\n\n    // Filer's Path.normalize strips trailing slashes, which we use here.\n    // See https://github.com/js-platform/filer/issues/105\n    filename = Path.normalize(filename_);\n\n    // Whether to watch beneath this path or not\n    recursive = recursive_ === true;\n    // If recursive, construct a path prefix portion for comparisons later\n    // (i.e., '/path' becomes '/path/' so we can search within a filename for the\n    // prefix). We also take care to allow for '/' on its own.\n    if(recursive) {\n      recursivePathPrefix = filename === '/' ? '/' : filename + '/';\n    }\n\n    var intercom = Intercom.getInstance();\n    intercom.on('change', onchange);\n  };\n\n  self.close = function() {\n    var intercom = Intercom.getInstance();\n    intercom.off('change', onchange);\n    self.removeAllListeners('change');\n  };\n}\nFSWatcher.prototype = new EventEmitter();\nFSWatcher.prototype.constructor = FSWatcher;\n\nmodule.exports = FSWatcher;\n","var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;\n\nmodule.exports = function DirectoryEntry(id, type) {\n  this.id = id;\n  this.type = type || NODE_TYPE_FILE;\n};\n","var Errors = require('./errors.js');\n\nfunction OpenFileDescription(path, id, flags, position) {\n  this.path = path;\n  this.id = id;\n  this.flags = flags;\n  this.position = position;\n}\n\n// Tries to find the node associated with an ofd's `id`.\n// If not found, an error is returned on the callback.\nOpenFileDescription.prototype.getNode = function(context, callback) {\n  var id = this.id;\n  var path = this.path;\n\n  function check_if_node_exists(error, node) {\n    if(error) {\n      return callback(error);\n    }\n\n    if(!node) {\n      return callback(new Errors.EBADF('file descriptor refers to unknown node', path));\n    }\n\n    callback(null, node);\n  }\n\n  context.getObject(id, check_if_node_exists);\n};\n\nmodule.exports = OpenFileDescription;\n","var Constants = require('./constants.js');\n\nfunction SuperNode(options) {\n  var now = Date.now();\n\n  this.id = Constants.SUPER_NODE_ID;\n  this.type = Constants.NODE_TYPE_META;\n  this.atime = options.atime || now;\n  this.ctime = options.ctime || now;\n  this.mtime = options.mtime || now;\n  // root node id (randomly generated)\n  this.rnode = options.rnode;\n}\n\nSuperNode.create = function(options, callback) {\n  options.guid(function(err, rnode) {\n    if(err) {\n      callback(err);\n      return;\n    }\n    options.rnode = options.rnode || rnode;\n    callback(null, new SuperNode(options));\n  });\n};\n\nmodule.exports = SuperNode;\n","var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;\nvar NODE_TYPE_DIRECTORY = require('./constants.js').NODE_TYPE_DIRECTORY;\nvar NODE_TYPE_SYMBOLIC_LINK = require('./constants.js').NODE_TYPE_SYMBOLIC_LINK;\nvar NODE_TYPE_META = require('./constants.js').NODE_TYPE_META;\n\nvar ROOT_DIRECTORY_NAME = require('./constants.js').ROOT_DIRECTORY_NAME;\n\nvar S_IFREG = require('./constants.js').S_IFREG;\nvar S_IFDIR = require('./constants.js').S_IFDIR;\nvar S_IFLNK = require('./constants.js').S_IFLNK;\n\nvar DEFAULT_FILE_PERMISSIONS = require('./constants.js').DEFAULT_FILE_PERMISSIONS;\nvar DEFAULT_DIR_PERMISSIONS = require('./constants.js').DEFAULT_DIR_PERMISSIONS;\n\nfunction getMode(type, mode) {\n  switch(type) {\n    case NODE_TYPE_DIRECTORY:\n      return (mode || DEFAULT_DIR_PERMISSIONS) | S_IFDIR;\n    case NODE_TYPE_SYMBOLIC_LINK:\n      return (mode || DEFAULT_FILE_PERMISSIONS) | S_IFLNK;\n    /* jshint -W086 */\n    case NODE_TYPE_FILE:\n      // falls through\n    default:\n      return (mode || DEFAULT_FILE_PERMISSIONS) | S_IFREG;\n  }\n}\n\nfunction Node(options) {\n  var now = Date.now();\n\n  this.id = options.id;\n  this.type = options.type || NODE_TYPE_FILE;  // node type (file, directory, etc)\n  this.size = options.size || 0; // size (bytes for files, entries for directories)\n  this.atime = options.atime || now; // access time (will mirror ctime after creation)\n  this.ctime = options.ctime || now; // creation/change time\n  this.mtime = options.mtime || now; // modified time\n  this.flags = options.flags || []; // file flags\n  this.xattrs = options.xattrs || {}; // extended attributes\n  this.nlinks = options.nlinks || 0; // links count\n  this.data = options.data; // id for data object\n  this.version = options.version || 1;\n\n  // permissions and flags\n  this.mode = options.mode || (getMode(this.type));\n  this.uid = options.uid || 0x0; // owner name\n  this.gid = options.gid || 0x0; // group name\n}\n\n// Make sure the options object has an id on property,\n// either from caller or one we generate using supplied guid fn.\nfunction ensureID(options, prop, callback) {\n  if(options[prop]) {\n    callback(null);\n  } else {\n    options.guid(function(err, id) {\n      options[prop] = id;\n      callback(err);\n    });\n  }\n}\n\nNode.create = function(options, callback) {\n  // We expect both options.id and options.data to be provided/generated.\n  ensureID(options, 'id', function(err) {\n    if(err) {\n      callback(err);\n      return;\n    }\n\n    ensureID(options, 'data', function(err) {\n      if(err) {\n        callback(err);\n        return;\n      }\n\n      callback(null, new Node(options));\n    });\n  });\n};\n\n// Update the node's mode (permissions), taking file type bits into account.\nNode.setMode = function(mode, node) {\n  node.mode = getMode(node.type, mode);\n};\n\nmodule.exports = Node;\n","var Constants = require('./constants.js');\nvar Path = require('./path.js');\n\nfunction Stats(path, fileNode, devName) {\n  this.dev = devName;\n  this.node = fileNode.id;\n  this.type = fileNode.type;\n  this.size = fileNode.size;\n  this.nlinks = fileNode.nlinks;\n  this.atime = fileNode.atime;\n  this.mtime = fileNode.mtime;\n  this.ctime = fileNode.ctime;\n  this.version = fileNode.version;\n  this.mode = fileNode.mode;\n  this.uid = fileNode.uid;\n  this.gid = fileNode.gid;\n  this.name = Path.basename(path);\n}\n\nStats.prototype.isFile = function() {\n  return this.type === Constants.NODE_TYPE_FILE;\n};\n\nStats.prototype.isDirectory = function() {\n  return this.type === Constants.NODE_TYPE_DIRECTORY;\n};\n\nStats.prototype.isSymbolicLink = function() {\n  return this.type === Constants.NODE_TYPE_SYMBOLIC_LINK;\n};\n\n// These will always be false in Filer.\nStats.prototype.isSocket          =\nStats.prototype.isFIFO            =\nStats.prototype.isCharacterDevice =\nStats.prototype.isBlockDevice     =\nfunction() {\n  return false;\n};\n\nmodule.exports = Stats;\n","var _ = require('../../lib/nodash.js');\n\nvar Path = require('../path.js');\nvar normalize = Path.normalize;\nvar dirname = Path.dirname;\nvar basename = Path.basename;\nvar isAbsolutePath = Path.isAbsolute;\nvar isNullPath = Path.isNull;\n\nvar Constants = require('../constants.js');\nvar NODE_TYPE_FILE = Constants.NODE_TYPE_FILE;\nvar NODE_TYPE_DIRECTORY = Constants.NODE_TYPE_DIRECTORY;\nvar NODE_TYPE_SYMBOLIC_LINK = Constants.NODE_TYPE_SYMBOLIC_LINK;\nvar NODE_TYPE_META = Constants.NODE_TYPE_META;\n\nvar DEFAULT_FILE_PERMISSIONS = Constants.DEFAULT_FILE_PERMISSIONS;\nvar DEFAULT_DIR_PERMISSIONS = Constants.DEFAULT_DIR_PERMISSIONS;\nvar FULL_READ_WRITE_EXEC_PERMISSIONS = Constants.FULL_READ_WRITE_EXEC_PERMISSIONS;\n\nvar ROOT_DIRECTORY_NAME = Constants.ROOT_DIRECTORY_NAME;\nvar SUPER_NODE_ID = Constants.SUPER_NODE_ID;\nvar SYMLOOP_MAX = Constants.SYMLOOP_MAX;\n\nvar O_READ = Constants.O_READ;\nvar O_WRITE = Constants.O_WRITE;\nvar O_CREATE = Constants.O_CREATE;\nvar O_EXCLUSIVE = Constants.O_EXCLUSIVE;\nvar O_TRUNCATE = Constants.O_TRUNCATE;\nvar O_APPEND = Constants.O_APPEND;\nvar O_FLAGS = Constants.O_FLAGS;\n\nvar XATTR_CREATE = Constants.XATTR_CREATE;\nvar XATTR_REPLACE = Constants.XATTR_REPLACE;\nvar FS_NOMTIME = Constants.FS_NOMTIME;\nvar FS_NOCTIME = Constants.FS_NOCTIME;\n\nvar Encoding = require('../encoding.js');\nvar Errors = require('../errors.js');\nvar DirectoryEntry = require('../directory-entry.js');\nvar OpenFileDescription = require('../open-file-description.js');\nvar SuperNode = require('../super-node.js');\nvar Node = require('../node.js');\nvar Stats = require('../stats.js');\nvar Buffer = require('../buffer.js');\n\n/**\n * Update node times. Only passed times are modified (undefined times are ignored)\n * and filesystem flags are examined in order to override update logic.\n */\nfunction update_node_times(context, path, node, times, callback) {\n  // Honour mount flags for how we update times\n  var flags = context.flags;\n  if(_(flags).contains(FS_NOCTIME)) {\n    delete times.ctime;\n  }\n  if(_(flags).contains(FS_NOMTIME)) {\n    delete times.mtime;\n  }\n\n  // Only do the update if required (i.e., times are still present)\n  var update = false;\n  if(times.ctime) {\n    node.ctime = times.ctime;\n    // We don't do atime tracking for perf reasons, but do mirror ctime\n    node.atime = times.ctime;\n    update = true;\n  }\n  if(times.atime) {\n    // The only time we explicitly pass atime is when utimes(), futimes() is called.\n    // Override ctime mirror here if so\n    node.atime = times.atime;\n    update = true;\n  }\n  if(times.mtime) {\n    node.mtime = times.mtime;\n    update = true;\n  }\n\n  function complete(error) {\n    // Queue this change so we can send watch events.\n    // Unlike node.js, we send the full path vs. basename/dirname only.\n    context.changes.push({ event: 'change', path: path });\n    callback(error);\n  }\n\n  if(update) {\n    context.putObject(node.id, node, complete);\n  } else {\n    complete();\n  }\n}\n\n/**\n * make_node()\n */\n// in: file or directory path\n// out: new node representing file/directory\nfunction make_node(context, path, type, callback) {\n  if(type !== NODE_TYPE_DIRECTORY && type !== NODE_TYPE_FILE) {\n    return callback(new Errors.EINVAL('type must be a directory or file', path));\n  }\n\n  path = normalize(path);\n\n  var name = basename(path);\n  var parentPath = dirname(path);\n  var parentNode;\n  var parentNodeData;\n  var node;\n\n  // Check if the parent node exists\n  function create_node_in_parent(error, parentDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(parentDirectoryNode.type !== NODE_TYPE_DIRECTORY) {\n      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));\n    } else {\n      parentNode = parentDirectoryNode;\n      find_node(context, path, check_if_node_exists);\n    }\n  }\n\n  // Check if the node to be created already exists\n  function check_if_node_exists(error, result) {\n    if(!error && result) {\n      callback(new Errors.EEXIST('path name already exists', path));\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      context.getObject(parentNode.data, create_node);\n    }\n  }\n\n  // Create the new node\n  function create_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentNodeData = result;\n      Node.create({\n        guid: context.guid,\n        type: type\n      }, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        node = result;\n        node.nlinks += 1;\n        context.putObject(node.id, node, update_parent_node_data);\n      });\n    }\n  }\n\n  // Update parent node time\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, node, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  // Update the parent nodes data\n  function update_parent_node_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      parentNodeData[name] = new DirectoryEntry(node.id, type);\n      context.putObject(parentNode.data, parentNodeData, update_time);\n    }\n  }\n\n  // Find the parent node\n  find_node(context, parentPath, create_node_in_parent);\n}\n\n/**\n * find_node\n */\n// in: file or directory path\n// out: node structure, or error\nfunction find_node(context, path, callback) {\n  path = normalize(path);\n  if(!path) {\n    return callback(new Errors.ENOENT('path is an empty string'));\n  }\n  var name = basename(path);\n  var parentPath = dirname(path);\n  var followedCount = 0;\n\n  function read_root_directory_node(error, superNode) {\n    if(error) {\n      callback(error);\n    } else if(!superNode || superNode.type !== NODE_TYPE_META || !superNode.rnode) {\n      callback(new Errors.EFILESYSTEMERROR());\n    } else {\n      context.getObject(superNode.rnode, check_root_directory_node);\n    }\n  }\n\n  function check_root_directory_node(error, rootDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(!rootDirectoryNode) {\n      callback(new Errors.ENOENT());\n    } else {\n      callback(null, rootDirectoryNode);\n    }\n  }\n\n  // in: parent directory node\n  // out: parent directory data\n  function read_parent_directory_data(error, parentDirectoryNode) {\n    if(error) {\n      callback(error);\n    } else if(parentDirectoryNode.type !== NODE_TYPE_DIRECTORY || !parentDirectoryNode.data) {\n      callback(new Errors.ENOTDIR('a component of the path prefix is not a directory', path));\n    } else {\n      context.getObject(parentDirectoryNode.data, get_node_from_parent_directory_data);\n    }\n  }\n\n  // in: parent directory data\n  // out: searched node\n  function get_node_from_parent_directory_data(error, parentDirectoryData) {\n    if(error) {\n      callback(error);\n    } else {\n      if(!_(parentDirectoryData).has(name)) {\n        callback(new Errors.ENOENT(null, path));\n      } else {\n        var nodeId = parentDirectoryData[name].id;\n        context.getObject(nodeId, is_symbolic_link);\n      }\n    }\n  }\n\n  function is_symbolic_link(error, node) {\n    if(error) {\n      callback(error);\n    } else {\n      if(node.type === NODE_TYPE_SYMBOLIC_LINK) {\n        followedCount++;\n        if(followedCount > SYMLOOP_MAX){\n          callback(new Errors.ELOOP(null, path));\n        } else {\n          follow_symbolic_link(node.data);\n        }\n      } else {\n        callback(null, node);\n      }\n    }\n  }\n\n  function follow_symbolic_link(data) {\n    data = normalize(data);\n    parentPath = dirname(data);\n    name = basename(data);\n    if(ROOT_DIRECTORY_NAME === name) {\n      context.getObject(SUPER_NODE_ID, read_root_directory_node);\n    } else {\n      find_node(context, parentPath, read_parent_directory_data);\n    }\n  }\n\n  if(ROOT_DIRECTORY_NAME === name) {\n    context.getObject(SUPER_NODE_ID, read_root_directory_node);\n  } else {\n    find_node(context, parentPath, read_parent_directory_data);\n  }\n}\n\n\n/**\n * set extended attribute (refactor)\n */\nfunction set_extended_attribute (context, path, node, name, value, flag, callback) {\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      update_node_times(context, path, node, { ctime: Date.now() }, callback);\n    }\n  }\n\n  var xattrs = node.xattrs;\n\n  if (flag === XATTR_CREATE && xattrs.hasOwnProperty(name)) {\n    callback(new Errors.EEXIST('attribute already exists', path));\n  }\n  else if (flag === XATTR_REPLACE && !xattrs.hasOwnProperty(name)) {\n    callback(new Errors.ENOATTR(null, path));\n  }\n  else {\n    xattrs[name] = value;\n    context.putObject(node.id, node, update_time);\n  }\n}\n\n/**\n * ensure_root_directory. Creates a root node if necessary.\n *\n * Note: this should only be invoked when formatting a new file system.\n * Multiple invocations of this by separate instances will still result\n * in only a single super node.\n */\nfunction ensure_root_directory(context, callback) {\n  var superNode;\n  var directoryNode;\n  var directoryData;\n\n  function ensure_super_node(error, existingNode) {\n    if(!error && existingNode) {\n      // Another instance has beat us and already created the super node.\n      callback();\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      SuperNode.create({guid: context.guid}, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        superNode = result;\n        context.putObject(superNode.id, superNode, write_directory_node);\n      });\n    }\n  }\n\n  function write_directory_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      Node.create({\n        guid: context.guid,\n        id: superNode.rnode,\n        type: NODE_TYPE_DIRECTORY\n      }, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        directoryNode = result;\n        directoryNode.nlinks += 1;\n        context.putObject(directoryNode.id, directoryNode, write_directory_data);\n      });\n    }\n  }\n\n  function write_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = {};\n      context.putObject(directoryNode.data, directoryData, callback);\n    }\n  }\n\n  context.getObject(SUPER_NODE_ID, ensure_super_node);\n}\n\n/**\n * make_directory\n */\nfunction make_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var parentDirectoryNode;\n  var parentDirectoryData;\n\n  function check_if_directory_exists(error, result) {\n    if(!error && result) {\n      callback(new Errors.EEXIST(null, path));\n    } else if(error && !(error instanceof Errors.ENOENT)) {\n      callback(error);\n    } else {\n      find_node(context, parentPath, read_parent_directory_data);\n    }\n  }\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryNode = result;\n      context.getObject(parentDirectoryNode.data, write_directory_node);\n    }\n  }\n\n  function write_directory_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryData = result;\n      Node.create({\n        guid: context.guid,\n        type: NODE_TYPE_DIRECTORY\n      }, function(error, result) {\n        if(error) {\n          callback(error);\n          return;\n        }\n        directoryNode = result;\n        directoryNode.nlinks += 1;\n        context.putObject(directoryNode.id, directoryNode, write_directory_data);\n      });\n    }\n  }\n\n  function write_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = {};\n      context.putObject(directoryNode.data, directoryData, update_parent_directory_data);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryData[name] = new DirectoryEntry(directoryNode.id, NODE_TYPE_DIRECTORY);\n      context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);\n    }\n  }\n\n  find_node(context, path, check_if_directory_exists);\n}\n\n/**\n * remove_directory\n */\nfunction remove_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var parentDirectoryNode;\n  var parentDirectoryData;\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      parentDirectoryNode = result;\n      context.getObject(parentDirectoryNode.data, check_if_node_exists);\n    }\n  }\n\n  function check_if_node_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else if(ROOT_DIRECTORY_NAME === name) {\n      callback(new Errors.EBUSY(null, path));\n    } else if(!_(result).has(name)) {\n      callback(new Errors.ENOENT(null, path));\n    } else {\n      parentDirectoryData = result;\n      directoryNode = parentDirectoryData[name].id;\n      context.getObject(directoryNode, check_if_node_is_directory);\n    }\n  }\n\n  function check_if_node_is_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.type !== NODE_TYPE_DIRECTORY) {\n      callback(new Errors.ENOTDIR(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_directory_is_empty);\n    }\n  }\n\n  function check_if_directory_is_empty(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).size() > 0) {\n        callback(new Errors.ENOTEMPTY(null, path));\n      } else {\n        remove_directory_entry_from_parent_directory_node();\n      }\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, remove_directory_node);\n    }\n  }\n\n  function remove_directory_entry_from_parent_directory_node() {\n    delete parentDirectoryData[name];\n    context.putObject(parentDirectoryNode.data, parentDirectoryData, update_time);\n  }\n\n  function remove_directory_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(directoryNode.id, remove_directory_data);\n    }\n  }\n\n  function remove_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(directoryNode.data, callback);\n    }\n  }\n\n  find_node(context, parentPath, read_parent_directory_data);\n}\n\nfunction open_file(context, path, flags, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var directoryEntry;\n  var fileNode;\n  var fileData;\n\n  var followedCount = 0;\n\n  if(ROOT_DIRECTORY_NAME === name) {\n    if(_(flags).contains(O_WRITE)) {\n      callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n    } else {\n      find_node(context, path, set_file_node);\n    }\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.type !== NODE_TYPE_DIRECTORY) {\n      callback(new Errors.ENOENT(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).has(name)) {\n        if(_(flags).contains(O_EXCLUSIVE)) {\n          callback(new Errors.ENOENT('O_CREATE and O_EXCLUSIVE are set, and the named file exists', path));\n        } else {\n          directoryEntry = directoryData[name];\n          if(directoryEntry.type === NODE_TYPE_DIRECTORY && _(flags).contains(O_WRITE)) {\n            callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n          } else {\n            context.getObject(directoryEntry.id, check_if_symbolic_link);\n          }\n        }\n      } else {\n        if(!_(flags).contains(O_CREATE)) {\n          callback(new Errors.ENOENT('O_CREATE is not set and the named file does not exist', path));\n        } else {\n          write_file_node();\n        }\n      }\n    }\n  }\n\n  function check_if_symbolic_link(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var node = result;\n      if(node.type === NODE_TYPE_SYMBOLIC_LINK) {\n        followedCount++;\n        if(followedCount > SYMLOOP_MAX){\n          callback(new Errors.ELOOP(null, path));\n        } else {\n          follow_symbolic_link(node.data);\n        }\n      } else {\n        set_file_node(undefined, node);\n      }\n    }\n  }\n\n  function follow_symbolic_link(data) {\n    data = normalize(data);\n    parentPath = dirname(data);\n    name = basename(data);\n    if(ROOT_DIRECTORY_NAME === name) {\n      if(_(flags).contains(O_WRITE)) {\n        callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set', path));\n      } else {\n        find_node(context, path, set_file_node);\n      }\n    }\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function set_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      callback(null, fileNode);\n    }\n  }\n\n  function write_file_node() {\n    Node.create({\n      guid: context.guid,\n      type: NODE_TYPE_FILE\n    }, function(error, result) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      fileNode = result;\n      fileNode.nlinks += 1;\n      context.putObject(fileNode.id, fileNode, write_file_data);\n    });\n  }\n\n  function write_file_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = new Buffer(0);\n      fileData.fill(0);\n      context.putBuffer(fileNode.data, fileData, update_directory_data);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, handle_update_result);\n    }\n  }\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_FILE);\n      context.putObject(directoryNode.data, directoryData, update_time);\n    }\n  }\n\n  function handle_update_result(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, fileNode);\n    }\n  }\n}\n\nfunction replace_data(context, ofd, buffer, offset, length, callback) {\n  var fileNode;\n\n  function return_nbytes(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, length);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);\n    }\n  }\n\n  function update_file_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function write_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      var newData = new Buffer(length);\n      newData.fill(0);\n      buffer.copy(newData, 0, offset, offset + length);\n      ofd.position = length;\n\n      fileNode.size = length;\n      fileNode.version += 1;\n\n      context.putBuffer(fileNode.data, newData, update_file_node);\n    }\n  }\n\n  context.getObject(ofd.id, write_file_data);\n}\n\nfunction write_data(context, ofd, buffer, offset, length, position, callback) {\n  var fileNode;\n  var fileData;\n\n  function return_nbytes(error) {\n    if(error) {\n      callback(error);\n    } else {\n      callback(null, length);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes);\n    }\n  }\n\n  function update_file_node(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function update_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = result;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var _position = (!(undefined === position || null === position)) ? position : ofd.position;\n      var newSize = Math.max(fileData.length, _position + length);\n      var newData = new Buffer(newSize);\n      newData.fill(0);\n      if(fileData) {\n        fileData.copy(newData);\n      }\n      buffer.copy(newData, _position, offset, offset + length);\n      if(undefined === position) {\n        ofd.position += length;\n      }\n\n      fileNode.size = newSize;\n      fileNode.version += 1;\n\n      context.putBuffer(fileNode.data, newData, update_file_node);\n    }\n  }\n\n  function read_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      context.getBuffer(fileNode.data, update_file_data);\n    }\n  }\n\n  context.getObject(ofd.id, read_file_data);\n}\n\nfunction read_data(context, ofd, buffer, offset, length, position, callback) {\n  var fileNode;\n  var fileData;\n\n  function handle_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileData = result;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var _position = (!(undefined === position || null === position)) ? position : ofd.position;\n      length = (_position + length > buffer.length) ? length - _position : length;\n      fileData.copy(buffer, offset, _position, _position + length);\n      if(undefined === position) {\n        ofd.position += length;\n      }\n      callback(null, length);\n    }\n  }\n\n  function read_file_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.type === NODE_TYPE_DIRECTORY) {\n      callback(new Errors.EISDIR('the named file is a directory', ofd.path));\n    } else {\n      fileNode = result;\n      context.getBuffer(fileNode.data, handle_file_data);\n    }\n  }\n\n  context.getObject(ofd.id, read_file_data);\n}\n\nfunction stat_file(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  find_node(context, path, callback);\n}\n\nfunction fstat_file(context, ofd, callback) {\n  ofd.getNode(context, callback);\n}\n\nfunction lstat_file(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n\n  if(ROOT_DIRECTORY_NAME === name) {\n    find_node(context, path, callback);\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', path));\n      } else {\n        context.getObject(directoryData[name].id, callback);\n      }\n    }\n  }\n}\n\nfunction link_node(context, oldpath, newpath, callback) {\n  oldpath = normalize(oldpath);\n  var oldname = basename(oldpath);\n  var oldParentPath = dirname(oldpath);\n\n  newpath = normalize(newpath);\n  var newname = basename(newpath);\n  var newParentPath = dirname(newpath);\n  var ctime = Date.now();\n\n  var oldDirectoryNode;\n  var oldDirectoryData;\n  var newDirectoryNode;\n  var newDirectoryData;\n  var fileNodeID;\n  var fileNode;\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);\n    }\n  }\n\n  function update_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      fileNode.nlinks += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  function read_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      context.getObject(fileNodeID, update_file_node);\n    }\n  }\n\n  function check_if_new_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newDirectoryData = result;\n      if(_(newDirectoryData).has(newname)) {\n        callback(new Errors.EEXIST('newpath resolves to an existing file', newname));\n      } else {\n        newDirectoryData[newname] = oldDirectoryData[oldname];\n        fileNodeID = newDirectoryData[newname].id;\n        context.putObject(newDirectoryNode.data, newDirectoryData, read_file_node);\n      }\n    }\n  }\n\n  function read_new_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newDirectoryNode = result;\n      context.getObject(newDirectoryNode.data, check_if_new_file_exists);\n    }\n  }\n\n  function check_if_old_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldDirectoryData = result;\n      if(!_(oldDirectoryData).has(oldname)) {\n        callback(new Errors.ENOENT('a component of either path prefix does not exist', oldname));\n      } else if(oldDirectoryData[oldname].type === NODE_TYPE_DIRECTORY) {\n        callback(new Errors.EPERM('oldpath refers to a directory'));\n      } else {\n        find_node(context, newParentPath, read_new_directory_data);\n      }\n    }\n  }\n\n  function read_old_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldDirectoryNode = result;\n      context.getObject(oldDirectoryNode.data, check_if_old_file_exists);\n    }\n  }\n\n  find_node(context, oldParentPath, read_old_directory_data);\n}\n\nfunction unlink_node(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n  var fileNode;\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      delete directoryData[name];\n      context.putObject(directoryNode.data, directoryData, function(error) {\n        var now = Date.now();\n        update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);\n      });\n    }\n  }\n\n  function delete_file_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.delete(fileNode.data, update_directory_data);\n    }\n  }\n\n  function update_file_node(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      fileNode.nlinks -= 1;\n      if(fileNode.nlinks < 1) {\n        context.delete(fileNode.id, delete_file_data);\n      } else {\n        context.putObject(fileNode.id, fileNode, function(error) {\n          update_node_times(context, path, fileNode, { ctime: Date.now() }, update_directory_data);\n        });\n      }\n    }\n  }\n\n  function check_if_node_is_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.type === NODE_TYPE_DIRECTORY) {\n      callback(new Errors.EPERM('unlink not permitted on directories', name));\n    } else {\n      update_file_node(null, result);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));\n      } else {\n        context.getObject(directoryData[name].id, check_if_node_is_directory);\n      }\n    }\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  find_node(context, parentPath, read_directory_data);\n}\n\nfunction read_directory(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n\n  var directoryNode;\n  var directoryData;\n\n  function handle_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      var files = Object.keys(directoryData);\n      callback(null, files);\n    }\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else if(result.type !== NODE_TYPE_DIRECTORY) {\n      callback(new Errors.ENOTDIR(null, path));\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, handle_directory_data);\n    }\n  }\n\n  find_node(context, path, read_directory_data);\n}\n\nfunction make_symbolic_link(context, srcpath, dstpath, callback) {\n  dstpath = normalize(dstpath);\n  var name = basename(dstpath);\n  var parentPath = dirname(dstpath);\n\n  var directoryNode;\n  var directoryData;\n  var fileNode;\n\n  if(ROOT_DIRECTORY_NAME === name) {\n    callback(new Errors.EEXIST(null, name));\n  } else {\n    find_node(context, parentPath, read_directory_data);\n  }\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(_(directoryData).has(name)) {\n        callback(new Errors.EEXIST(null, name));\n      } else {\n        write_file_node();\n      }\n    }\n  }\n\n  function write_file_node() {\n    Node.create({\n      guid: context.guid,\n      type: NODE_TYPE_SYMBOLIC_LINK\n    }, function(error, result) {\n      if(error) {\n        callback(error);\n        return;\n      }\n      fileNode = result;\n      fileNode.nlinks += 1;\n\n      // If the srcpath isn't absolute, resolve it relative to the dstpath\n      // but store both versions, since we'll use the relative one in readlink().\n      if(!isAbsolutePath(srcpath)) {\n        fileNode.symlink_relpath = srcpath;\n        srcpath = Path.resolve(parentPath, srcpath); \n      }\n\n      fileNode.size = srcpath.length;\n      fileNode.data = srcpath;\n      \n      context.putObject(fileNode.id, fileNode, update_directory_data);\n    });\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData[name] = new DirectoryEntry(fileNode.id, NODE_TYPE_SYMBOLIC_LINK);\n      context.putObject(directoryNode.data, directoryData, update_time);\n    }\n  }\n}\n\nfunction read_link(context, path, callback) {\n  path = normalize(path);\n  var name = basename(path);\n  var parentPath = dirname(path);\n\n  var directoryNode;\n  var directoryData;\n\n  find_node(context, parentPath, read_directory_data);\n\n  function read_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryNode = result;\n      context.getObject(directoryNode.data, check_if_file_exists);\n    }\n  }\n\n  function check_if_file_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      directoryData = result;\n      if(!_(directoryData).has(name)) {\n        callback(new Errors.ENOENT('a component of the path does not name an existing file', name));\n      } else {\n        context.getObject(directoryData[name].id, check_if_symbolic);\n      }\n    }\n  }\n\n  function check_if_symbolic(error, fileNode) {\n    if(error) {\n      callback(error);\n    } else {\n      if(fileNode.type !== NODE_TYPE_SYMBOLIC_LINK) {\n        callback(new Errors.EINVAL('path not a symbolic link', path));\n      } else {\n        // If we were originally given a relative path, return that now vs. the\n        // absolute path we've generated and use elsewhere internally.\n        var target = fileNode.symlink_relpath ? fileNode.symlink_relpath : fileNode.data;\n        callback(null, target);\n      }\n    }\n  }\n}\n\nfunction truncate_file(context, path, length, callback) {\n  path = normalize(path);\n\n  var fileNode;\n\n  function read_file_data (error, node) {\n    if (error) {\n      callback(error);\n    } else if(node.type === NODE_TYPE_DIRECTORY ) {\n      callback(new Errors.EISDIR(null, path));\n    } else{\n      fileNode = node;\n      context.getBuffer(fileNode.data, truncate_file_data);\n    }\n  }\n\n  function truncate_file_data(error, fileData) {\n    if (error) {\n      callback(error);\n    } else {\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      var data = new Buffer(length);\n      data.fill(0);\n      if(fileData) {\n        fileData.copy(data);\n      }\n      context.putBuffer(fileNode.data, data, update_file_node);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, path, fileNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_file_node (error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode.size = length;\n      fileNode.version += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  if(length < 0) {\n    callback(new Errors.EINVAL('length cannot be negative'));\n  } else {\n    find_node(context, path, read_file_data);\n  }\n}\n\nfunction ftruncate_file(context, ofd, length, callback) {\n  var fileNode;\n\n  function read_file_data (error, node) {\n    if (error) {\n      callback(error);\n    } else if(node.type === NODE_TYPE_DIRECTORY ) {\n      callback(new Errors.EISDIR());\n    } else{\n      fileNode = node;\n      context.getBuffer(fileNode.data, truncate_file_data);\n    }\n  }\n\n  function truncate_file_data(error, fileData) {\n    if (error) {\n      callback(error);\n    } else {\n      var data;\n      if(!fileData) {\n        return callback(new Errors.EIO('Expected Buffer'));\n      }\n      if(fileData) {\n        data = fileData.slice(0, length);\n      } else {\n        data = new Buffer(length);\n        data.fill(0);\n      }\n      context.putBuffer(fileNode.data, data, update_file_node);\n    }\n  }\n\n  function update_time(error) {\n    if(error) {\n      callback(error);\n    } else {\n      var now = Date.now();\n      update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, callback);\n    }\n  }\n\n  function update_file_node (error) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode.size = length;\n      fileNode.version += 1;\n      context.putObject(fileNode.id, fileNode, update_time);\n    }\n  }\n\n  if(length < 0) {\n    callback(new Errors.EINVAL('length cannot be negative'));\n  } else {\n    ofd.getNode(context, read_file_data);\n  }\n}\n\nfunction utimes_file(context, path, atime, mtime, callback) {\n  path = normalize(path);\n\n  function update_times(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      update_node_times(context, path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);\n    }\n  }\n\n  if (typeof atime !== 'number' || typeof mtime !== 'number') {\n    callback(new Errors.EINVAL('atime and mtime must be number', path));\n  }\n  else if (atime < 0 || mtime < 0) {\n    callback(new Errors.EINVAL('atime and mtime must be positive integers', path));\n  }\n  else {\n    find_node(context, path, update_times);\n  }\n}\n\nfunction futimes_file(context, ofd, atime, mtime, callback) {\n\n  function update_times (error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      update_node_times(context, ofd.path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback);\n    }\n  }\n\n  if (typeof atime !== 'number' || typeof mtime !== 'number') {\n    callback(new Errors.EINVAL('atime and mtime must be a number'));\n  }\n  else if (atime < 0 || mtime < 0) {\n    callback(new Errors.EINVAL('atime and mtime must be positive integers'));\n  }\n  else {\n    ofd.getNode(context, update_times);\n  }\n}\n\nfunction setxattr_file(context, path, name, value, flag, callback) {\n  path = normalize(path);\n\n  function setxattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n    set_extended_attribute(context, path, node, name, value, flag, callback);\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else if (flag !== null &&\n           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {\n    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE', path));\n  }\n  else {\n    find_node(context, path, setxattr);\n  }\n}\n\nfunction fsetxattr_file (context, ofd, name, value, flag, callback) {\n  function setxattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n    set_extended_attribute(context, ofd.path, node, name, value, flag, callback);\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string'));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else if (flag !== null &&\n           flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {\n    callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE'));\n  }\n  else {\n    ofd.getNode(context, setxattr);\n  }\n}\n\nfunction getxattr_file (context, path, name, callback) {\n  path = normalize(path);\n\n  function get_xattr(error, node) {\n    if(error) {\n      return callback(error);\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR(null, path));\n    }\n    else {\n      callback(null, xattrs[name]);\n    }\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else {\n    find_node(context, path, get_xattr);\n  }\n}\n\nfunction fgetxattr_file (context, ofd, name, callback) {\n\n  function get_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR());\n    }\n    else {\n      callback(null, xattrs[name]);\n    }\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL());\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else {\n    ofd.getNode(context, get_xattr);\n  }\n}\n\nfunction removexattr_file (context, path, name, callback) {\n  path = normalize(path);\n\n  function remove_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    function update_time(error) {\n      if(error) {\n        callback(error);\n      } else {\n        update_node_times(context, path, node, { ctime: Date.now() }, callback);\n      }\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR(null, path));\n    }\n    else {\n      delete xattrs[name];\n      context.putObject(node.id, node, update_time);\n    }\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string', path));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string', path));\n  }\n  else {\n    find_node(context, path, remove_xattr);\n  }\n}\n\nfunction fremovexattr_file (context, ofd, name, callback) {\n\n  function remove_xattr (error, node) {\n    if (error) {\n      return callback(error);\n    }\n\n    function update_time(error) {\n      if(error) {\n        callback(error);\n      } else {\n        update_node_times(context, ofd.path, node, { ctime: Date.now() }, callback);\n      }\n    }\n\n    var xattrs = node.xattrs;\n\n    if (!xattrs.hasOwnProperty(name)) {\n      callback(new Errors.ENOATTR());\n    }\n    else {\n      delete xattrs[name];\n      context.putObject(node.id, node, update_time);\n    }\n  }\n\n  if (typeof name !== 'string') {\n    callback(new Errors.EINVAL('attribute name must be a string'));\n  }\n  else if (!name) {\n    callback(new Errors.EINVAL('attribute name cannot be an empty string'));\n  }\n  else {\n    ofd.getNode(context, remove_xattr);\n  }\n}\n\nfunction validate_flags(flags) {\n  if(!_(O_FLAGS).has(flags)) {\n    return null;\n  }\n  return O_FLAGS[flags];\n}\n\nfunction validate_file_options(options, enc, fileMode){\n  if(!options) {\n    options = { encoding: enc, flag: fileMode };\n  } else if(typeof options === \"function\") {\n    options = { encoding: enc, flag: fileMode };\n  } else if(typeof options === \"string\") {\n    options = { encoding: options, flag: fileMode };\n  }\n  return options;\n}\n\nfunction pathCheck(path, allowRelative, callback) {\n  var err;\n\n  if(typeof allowRelative === 'function') {\n    callback = allowRelative;\n    allowRelative = false;\n  }\n\n  if(!path) {\n    err = new Errors.EINVAL('Path must be a string', path);\n  } else if(isNullPath(path)) {\n    err = new Errors.EINVAL('Path must be a string without null bytes.', path);\n  } else if(!allowRelative && !isAbsolutePath(path)) {\n    err = new Errors.EINVAL('Path must be absolute.', path);\n  }\n\n  if(err) {\n    callback(err);\n    return false;\n  }\n  return true;\n}\n\n\nfunction open(fs, context, path, flags, mode, callback) {\n  /**\n   * NOTE: we support the same signature as node with a `mode` arg,\n   * but ignore it. We need to add it.  Here is what node.js does:\n   * function open(path, flags, mode, callback) {\n   *    path = getPathFromURL(path);\n   *  validatePath(path);\n   *  const flagsNumber = stringToFlags(flags);\n   *  if (arguments.length < 4) {\n   *    callback = makeCallback(mode);\n   *    mode = 0o666;\n   *  } else {\n   *    mode = validateAndMaskMode(mode, 'mode', 0o666);\n   *    callback = makeCallback(callback);\n   * }\n  */\n\n  callback = arguments[arguments.length - 1];\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, fileNode) {\n    if(error) {\n      callback(error);\n    } else {\n      var position;\n      if(_(flags).contains(O_APPEND)) {\n        position = fileNode.size;\n      } else {\n        position = 0;\n      }\n      var openFileDescription = new OpenFileDescription(path, fileNode.id, flags, position);\n      var fd = fs.allocDescriptor(openFileDescription);\n      callback(null, fd);\n    }\n  }\n\n  flags = validate_flags(flags);\n  if(!flags) {\n    callback(new Errors.EINVAL('flags is not valid'), path);\n  }\n\n  open_file(context, path, flags, check_result);\n}\n\nfunction close(fs, context, fd, callback) {\n  if(!_(fs.openFiles).has(fd)) {\n    callback(new Errors.EBADF());\n  } else {\n    fs.releaseDescriptor(fd);\n    callback(null);\n  }\n}\n\nfunction mknod(fs, context, path, type, callback) {\n  if(!pathCheck(path, callback)) return;\n  make_node(context, path, type, callback);\n}\n\nfunction mkdir(fs, context, path, mode, callback) {\n  if (arguments.length < 5) {\n    callback = mode;\n    mode = FULL_READ_WRITE_EXEC_PERMISSIONS;\n  } else {\n    mode = validateAndMaskMode(mode, FULL_READ_WRITE_EXEC_PERMISSIONS, callback);\n    if(!mode) return;\n  }\n \n  if(!pathCheck(path, callback)) return;\n  make_directory(context, path, callback);\n}\n\nfunction rmdir(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  remove_directory(context, path, callback);\n}\n\nfunction stat(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(path, result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  stat_file(context, path, check_result);\n}\n\nfunction fstat(fs, context, fd, callback) {\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(ofd.path, result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else {\n    fstat_file(context, ofd, check_result);\n  }\n}\n\nfunction link(fs, context, oldpath, newpath, callback) {\n  if(!pathCheck(oldpath, callback)) return;\n  if(!pathCheck(newpath, callback)) return;\n  link_node(context, oldpath, newpath, callback);\n}\n\nfunction unlink(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  unlink_node(context, path, callback);\n}\n\nfunction read(fs, context, fd, buffer, offset, length, position, callback) {\n  // Follow how node.js does this\n  function wrapped_cb(err, bytesRead) {\n    // Retain a reference to buffer so that it can't be GC'ed too soon.\n    callback(err, bytesRead || 0, buffer);\n  }\n\n  offset = (undefined === offset) ? 0 : offset;\n  length = (undefined === length) ? buffer.length - offset : length;\n  callback = arguments[arguments.length - 1];\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_READ)) {\n    callback(new Errors.EBADF('descriptor does not permit reading'));\n  } else {\n    read_data(context, ofd, buffer, offset, length, position, wrapped_cb);\n  }\n}\n\nfunction readFile(fs, context, path, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, null, 'r');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'r');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);\n    var fd = fs.allocDescriptor(ofd);\n\n    function cleanup() {\n      fs.releaseDescriptor(fd);\n    }\n\n    fstat_file(context, ofd, function(err, fstatResult) {\n      if(err) {\n        cleanup();\n        return callback(err);\n      }\n\n      var stats = new Stats(ofd.path, fstatResult, fs.name);\n\n      if(stats.isDirectory()) {\n        cleanup();\n        return callback(new Errors.EISDIR('illegal operation on directory', path));\n      }\n\n      var size = stats.size;\n      var buffer = new Buffer(size);\n      buffer.fill(0);\n\n      read_data(context, ofd, buffer, 0, size, 0, function(err, nbytes) {\n        cleanup();\n\n        if(err) {\n          return callback(err);\n        }\n\n        var data;\n        if(options.encoding === 'utf8') {\n          data = Encoding.decode(buffer);\n        } else {\n          data = buffer;\n        }\n        callback(null, data);\n      });\n    });\n  });\n}\n\nfunction write(fs, context, fd, buffer, offset, length, position, callback) {\n  callback = arguments[arguments.length - 1];\n  offset = (undefined === offset) ? 0 : offset;\n  length = (undefined === length) ? buffer.length - offset : length;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else if(buffer.length - offset < length) {\n    callback(new Errors.EIO('intput buffer is too small'));\n  } else {\n    write_data(context, ofd, buffer, offset, length, position, callback);\n  }\n}\n\nfunction writeFile(fs, context, path, data, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, 'utf8', 'w');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'w');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  data = data || '';\n  if(typeof data === \"number\") {\n    data = '' + data;\n  }\n  if(typeof data === \"string\" && options.encoding === 'utf8') {\n    data = Encoding.encode(data);\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, 0);\n    var fd = fs.allocDescriptor(ofd);\n\n    replace_data(context, ofd, data, 0, data.length, function(err, nbytes) {\n      fs.releaseDescriptor(fd);\n\n      if(err) {\n        return callback(err);\n      }\n      callback(null);\n    });\n  });\n}\n\nfunction appendFile(fs, context, path, data, options, callback) {\n  callback = arguments[arguments.length - 1];\n  options = validate_file_options(options, 'utf8', 'a');\n\n  if(!pathCheck(path, callback)) return;\n\n  var flags = validate_flags(options.flag || 'a');\n  if(!flags) {\n    return callback(new Errors.EINVAL('flags is not valid', path));\n  }\n\n  data = data || '';\n  if(typeof data === \"number\") {\n    data = '' + data;\n  }\n  if(typeof data === \"string\" && options.encoding === 'utf8') {\n    data = Encoding.encode(data);\n  }\n\n  open_file(context, path, flags, function(err, fileNode) {\n    if(err) {\n      return callback(err);\n    }\n    var ofd = new OpenFileDescription(path, fileNode.id, flags, fileNode.size);\n    var fd = fs.allocDescriptor(ofd);\n\n    write_data(context, ofd, data, 0, data.length, ofd.position, function(err, nbytes) {\n      fs.releaseDescriptor(fd);\n\n      if(err) {\n        return callback(err);\n      }\n      callback(null);\n    });\n  });\n}\n\nfunction exists(fs, context, path, callback) {\n  function cb(err, stats) {\n    callback(err ? false : true);\n  }\n  stat(fs, context, path, cb);\n}\n\n// Based on https://github.com/nodejs/node/blob/c700cc42da9cf73af9fec2098520a6c0a631d901/lib/internal/validators.js#L21\nvar octalReg = /^[0-7]+$/;\nvar modeDesc = 'must be a 32-bit unsigned integer or an octal string';\nfunction isUint32(value) {\n  return value === (value >>> 0);\n}\n// Validator for mode_t (the S_* constants). Valid numbers or octal strings\n// will be masked with 0o777 to be consistent with the behavior in POSIX APIs.\nfunction validateAndMaskMode(value, def, callback) {\n  if(typeof def === 'function') {\n    callback = def;\n    def = undefined;\n  }\n\n  if (isUint32(value)) {\n    return value & FULL_READ_WRITE_EXEC_PERMISSIONS;\n  }\n\n  if (typeof value === 'number') {\n    if (!Number.isInteger(value)) {\n      callback(new Errors.EINVAL('mode not a valid an integer value', value));\n      return false;\n    } else {\n      // 2 ** 32 === 4294967296\n      callback(new Errors.EINVAL('mode not a valid an integer value', value));\n      return false;\n    }\n  }\n\n  if (typeof value === 'string') {\n    if (!octalReg.test(value)) {\n      callback(new Errors.EINVAL('mode not a valid octal string', value));\n      return false;\n    }\n    var parsed = parseInt(value, 8);\n    return parsed & FULL_READ_WRITE_EXEC_PERMISSIONS;\n  }\n\n  // TODO(BridgeAR): Only return `def` in case `value === null`\n  if (def !== undefined) {\n    return def;\n  }\n\n  callback(new Errors.EINVAL('mode not valid', value));\n  return false;\n}\n\nfunction chmod_file(context, path, mode, callback) {\n  path = normalize(path);\n\n  function update_mode(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      Node.setMode(mode, node);\n      update_node_times(context, path, node, { mtime: Date.now() }, callback);\n    }\n  }\n\n  if (typeof mode !== 'number') {\n    callback(new Errors.EINVAL('mode must be number', path));\n  }\n  else {\n    find_node(context, path, update_mode);\n  }\n}\n\nfunction fchmod_file(context, ofd, mode, callback) {\n  function update_mode(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      node.mode = mode;\n      update_node_times(context, ofd.path, node, { mtime: Date.now() }, callback);\n    }\n  }\n\n  if (typeof mode !== 'number') {\n    callback(new Errors.EINVAL('mode must be a number'));\n  }\n  else {\n    ofd.getNode(context, update_mode);\n  }\n}\n\nfunction chown_file(context, path, uid, gid, callback) {\n  path = normalize(path);\n\n  function update_owner(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      node.uid = uid;\n      node.gid = gid;\n      update_node_times(context, path, node, { mtime: Date.now() }, callback);\n    }\n  }\n\n  find_node(context, path, update_owner);\n}\n\nfunction fchown_file(context, ofd, uid, gid, callback) {\n  function update_owner(error, node) {\n    if (error) {\n      callback(error);\n    } else {\n      node.uid = uid;\n      node.gid = gid;\n      update_node_times(context, ofd.path, node, { mtime: Date.now() }, callback);\n    }\n  }\n\n  ofd.getNode(context, update_owner);\n}\n\nfunction getxattr(fs, context, path, name, callback) {\n  if (!pathCheck(path, callback)) return;\n  getxattr_file(context, path, name, callback);\n}\n\nfunction fgetxattr(fs, context, fd, name, callback) {\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else {\n    fgetxattr_file(context, ofd, name, callback);\n  }\n}\n\nfunction setxattr(fs, context, path, name, value, flag, callback) {\n  if(typeof flag === 'function') {\n    callback = flag;\n    flag = null;\n  }\n\n  if (!pathCheck(path, callback)) return;\n  setxattr_file(context, path, name, value, flag, callback);\n}\n\nfunction fsetxattr(fs, context, fd, name, value, flag, callback) {\n  if(typeof flag === 'function') {\n    callback = flag;\n    flag = null;\n  }\n\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else if (!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  }\n  else {\n    fsetxattr_file(context, ofd, name, value, flag, callback);\n  }\n}\n\nfunction removexattr(fs, context, path, name, callback) {\n  if (!pathCheck(path, callback)) return;\n  removexattr_file(context, path, name, callback);\n}\n\nfunction fremovexattr(fs, context, fd, name, callback) {\n  var ofd = fs.openFiles[fd];\n  if (!ofd) {\n    callback(new Errors.EBADF());\n  }\n  else if (!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  }\n  else {\n    fremovexattr_file(context, ofd, name, callback);\n  }\n}\n\nfunction lseek(fs, context, fd, offset, whence, callback) {\n  function update_descriptor_position(error, stats) {\n    if(error) {\n      callback(error);\n    } else {\n      if(stats.size + offset < 0) {\n        callback(new Errors.EINVAL('resulting file offset would be negative'));\n      } else {\n        ofd.position = stats.size + offset;\n        callback(null, ofd.position);\n      }\n    }\n  }\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  }\n\n  if('SET' === whence) {\n    if(offset < 0) {\n      callback(new Errors.EINVAL('resulting file offset would be negative'));\n    } else {\n      ofd.position = offset;\n      callback(null, ofd.position);\n    }\n  } else if('CUR' === whence) {\n    if(ofd.position + offset < 0) {\n      callback(new Errors.EINVAL('resulting file offset would be negative'));\n    } else {\n      ofd.position += offset;\n      callback(null, ofd.position);\n    }\n  } else if('END' === whence) {\n    fstat_file(context, ofd, update_descriptor_position);\n  } else {\n    callback(new Errors.EINVAL('whence argument is not a proper value'));\n  }\n}\n\nfunction readdir(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  read_directory(context, path, callback);\n}\n\nfunction utimes(fs, context, path, atime, mtime, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  var currentTime = Date.now();\n  atime = (atime) ? atime : currentTime;\n  mtime = (mtime) ? mtime : currentTime;\n\n  utimes_file(context, path, atime, mtime, callback);\n}\n\nfunction futimes(fs, context, fd, atime, mtime, callback) {\n  var currentTime = Date.now();\n  atime = (atime) ? atime : currentTime;\n  mtime = (mtime) ? mtime : currentTime;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    futimes_file(context, ofd, atime, mtime, callback);\n  }\n}\n\nfunction chmod(fs, context, path, mode, callback) {\n  if(!pathCheck(path, callback)) return;\n  mode = validateAndMaskMode(mode, 'mode');\n  if(!mode) return;\n\n  chmod_file(context, path, mode, callback);\n}\n\nfunction fchmod(fs, context, fd, mode, callback) {\n  mode = validateAndMaskMode(mode, 'mode');\n  if(!mode) return;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    fchmod_file(context, ofd, mode, callback);\n  }\n}\n\nfunction chown(fs, context, path, uid, gid, callback) {\n  if(!pathCheck(path, callback)) return;\n  if(!isUint32(uid)) {\n    return callback(new Errors.EINVAL('uid must be a valid integer', uid));\n  }\n  if(!isUint32(gid)) {\n    return callback(new Errors.EINVAL('gid must be a valid integer', gid));\n  }\n\n  chown_file(context, path, uid, gid, callback);\n}\n\nfunction fchown(fs, context, fd, uid, gid, callback) {\n  if(!isUint32(uid)) {\n    return callback(new Errors.EINVAL('uid must be a valid integer', uid));\n  }\n  if(!isUint32(gid)) {\n    return callback(new Errors.EINVAL('gid must be a valid integer', gid));\n  }\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    fchown_file(context, ofd, uid, gid, callback);\n  }\n}\n\nfunction rename(fs, context, oldpath, newpath, callback) {\n  if(!pathCheck(oldpath, callback)) return;\n  if(!pathCheck(newpath, callback)) return;\n\n  oldpath = normalize(oldpath);\n  newpath = normalize(newpath);\n\n  var oldParentPath = Path.dirname(oldpath);\n  var newParentPath = Path.dirname(oldpath);\n  var oldName = Path.basename(oldpath);\n  var newName = Path.basename(newpath);\n  var oldParentDirectory, oldParentData;\n  var newParentDirectory, newParentData;\n  var ctime = Date.now();\n  var fileNode;\n\n  function update_times(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      fileNode = result;\n      update_node_times(context, newpath, fileNode, { ctime: ctime }, callback);\n    }\n  }\n\n  function read_new_directory(error) {\n    if(error) {\n      callback(error);\n    } else {\n      context.getObject(newParentData[newName].id, update_times);\n    }\n  }\n\n  function update_old_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      if(oldParentDirectory.id === newParentDirectory.id) {\n        oldParentData = newParentData;\n      }\n      delete oldParentData[oldName];\n      context.putObject(oldParentDirectory.data, oldParentData, read_new_directory);\n    }\n  }\n\n  function update_new_parent_directory_data(error) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentData[newName] = oldParentData[oldName];\n      context.putObject(newParentDirectory.data, newParentData, update_old_parent_directory_data);\n    }\n  }\n\n  function check_if_new_directory_exists(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentData = result;\n      if(_(newParentData).has(newName)) {\n        remove_directory(context, newpath, update_new_parent_directory_data);\n      } else {\n        update_new_parent_directory_data();\n      }\n    }\n  }\n\n  function read_new_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      newParentDirectory = result;\n      context.getObject(newParentDirectory.data, check_if_new_directory_exists);\n    }\n  }\n\n  function get_new_parent_directory(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldParentData = result;\n      find_node(context, newParentPath, read_new_parent_directory_data);\n    }\n  }\n\n  function read_parent_directory_data(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      oldParentDirectory = result;\n      context.getObject(result.data, get_new_parent_directory);\n    }\n  }\n\n  function unlink_old_file(error) {\n    if(error) {\n      callback(error);\n    } else {\n      unlink_node(context, oldpath, callback);\n    }\n  }\n\n  function check_node_type(error, node) {\n    if(error) {\n      callback(error);\n    } else if(node.type === NODE_TYPE_DIRECTORY) {\n      find_node(context, oldParentPath, read_parent_directory_data);\n    } else {\n      link_node(context, oldpath, newpath, unlink_old_file);\n    }\n  }\n\n  find_node(context, oldpath, check_node_type);\n}\n\nfunction symlink(fs, context, srcpath, dstpath, type, callback) {\n  // NOTE: we support passing the `type` arg, but ignore it.\n  callback = arguments[arguments.length - 1];\n\n  // Special Case: allow srcpath to be relative, which we normally don't permit.\n  // If the srcpath is relative, we assume it's relative to the dirpath of \n  // dstpath.\n  if(!pathCheck(srcpath, true, callback)) return;\n  if(!pathCheck(dstpath, callback)) return;\n\n  make_symbolic_link(context, srcpath, dstpath, callback);\n}\n\nfunction readlink(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n  read_link(context, path, callback);\n}\n\nfunction lstat(fs, context, path, callback) {\n  if(!pathCheck(path, callback)) return;\n\n  function check_result(error, result) {\n    if(error) {\n      callback(error);\n    } else {\n      var stats = new Stats(path, result, fs.name);\n      callback(null, stats);\n    }\n  }\n\n  lstat_file(context, path, check_result);\n}\n\nfunction truncate(fs, context, path, length, callback) {\n  // NOTE: length is optional\n  callback = arguments[arguments.length - 1];\n  length = length || 0;\n\n  if(!pathCheck(path, callback)) return;\n  truncate_file(context, path, length, callback);\n}\n\nfunction ftruncate(fs, context, fd, length, callback) {\n  // NOTE: length is optional\n  callback = arguments[arguments.length - 1];\n  length = length || 0;\n\n  var ofd = fs.openFiles[fd];\n  if(!ofd) {\n    callback(new Errors.EBADF());\n  } else if(!_(ofd.flags).contains(O_WRITE)) {\n    callback(new Errors.EBADF('descriptor does not permit writing'));\n  } else {\n    ftruncate_file(context, ofd, length, callback);\n  }\n}\n\nmodule.exports = {\n  ensureRootDirectory: ensure_root_directory,\n  open: open,\n  chmod: chmod,\n  fchmod: fchmod,\n  chown: chown,\n  fchown: fchown,\n  close: close,\n  mknod: mknod,\n  mkdir: mkdir,\n  rmdir: rmdir,\n  unlink: unlink,\n  stat: stat,\n  fstat: fstat,\n  link: link,\n  read: read,\n  readFile: readFile,\n  write: write,\n  writeFile: writeFile,\n  appendFile: appendFile,\n  exists: exists,\n  getxattr: getxattr,\n  fgetxattr: fgetxattr,\n  setxattr: setxattr,\n  fsetxattr: fsetxattr,\n  removexattr: removexattr,\n  fremovexattr: fremovexattr,\n  lseek: lseek,\n  readdir: readdir,\n  utimes: utimes,\n  futimes: futimes,\n  rename: rename,\n  symlink: symlink,\n  readlink: readlink,\n  lstat: lstat,\n  truncate: truncate,\n  ftruncate: ftruncate\n};\n","var _ = require('../../lib/nodash.js');\n\nvar isNullPath = require('../path.js').isNull;\nvar nop = require('../shared.js').nop;\n\nvar Constants = require('../constants.js');\nvar FILE_SYSTEM_NAME = Constants.FILE_SYSTEM_NAME;\nvar FS_FORMAT = Constants.FS_FORMAT;\nvar FS_READY = Constants.FS_READY;\nvar FS_PENDING = Constants.FS_PENDING;\nvar FS_ERROR = Constants.FS_ERROR;\nvar FS_NODUPEIDCHECK = Constants.FS_NODUPEIDCHECK;\n\nvar providers = require('../providers/index.js');\n\nvar Shell = require('../shell/shell.js');\nvar Intercom = require('../../lib/intercom.js');\nvar FSWatcher = require('../fs-watcher.js');\nvar Errors = require('../errors.js');\nvar defaultGuidFn = require('../shared.js').guid;\n\nvar STDIN = Constants.STDIN;\nvar STDOUT = Constants.STDOUT;\nvar STDERR = Constants.STDERR;\nvar FIRST_DESCRIPTOR = Constants.FIRST_DESCRIPTOR;\n\n// The core fs operations live on impl\nvar impl = require('./implementation.js');\n\n// node.js supports a calling pattern that leaves off a callback.\nfunction maybeCallback(callback) {\n  if(typeof callback === \"function\") {\n    return callback;\n  }\n  return function(err) {\n    if(err) {\n      throw err;\n    }\n  };\n}\n\n// Default callback that logs an error if passed in\nfunction defaultCallback(err) {\n  if(err) {\n    console.error('Filer error: ', err);\n  }\n}\n\n/**\n * FileSystem\n *\n * A FileSystem takes an `options` object, which can specify a number of,\n * options.  All options are optional, and include:\n *\n * name: the name of the file system, defaults to \"local\"\n *\n * flags: one or more flags to use when creating/opening the file system.\n *        For example: \"FORMAT\" will cause the file system to be formatted.\n *        No explicit flags are set by default.\n *\n * provider: an explicit storage provider to use for the file\n *           system's database context provider.  A number of context\n *           providers are included (see /src/providers), and users\n *           can write one of their own and pass it in to be used.\n *           By default an IndexedDB provider is used.\n *\n * guid: a function for generating unique IDs for nodes in the filesystem.\n *       Use this to override the built-in UUID generation. (Used mainly for tests).\n *\n * callback: a callback function to be executed when the file system becomes\n *           ready for use. Depending on the context provider used, this might\n *           be right away, or could take some time. The callback should expect\n *           an `error` argument, which will be null if everything worked.  Also\n *           users should check the file system's `readyState` and `error`\n *           properties to make sure it is usable.\n */\nfunction FileSystem(options, callback) {\n  options = options || {};\n  callback = callback || defaultCallback;\n\n  var flags = options.flags;\n  var guid = options.guid ? options.guid : defaultGuidFn;\n  var provider = options.provider || new providers.Default(options.name || FILE_SYSTEM_NAME);\n  // If we're given a provider, match its name unless we get an explicit name\n  var name = options.name || provider.name;\n  var forceFormatting = _(flags).contains(FS_FORMAT);\n\n  var fs = this;\n  fs.readyState = FS_PENDING;\n  fs.name = name;\n  fs.error = null;\n\n  fs.stdin = STDIN;\n  fs.stdout = STDOUT;\n  fs.stderr = STDERR;\n\n  // Expose Node's fs.constants to users\n  fs.constants = Constants.fsConstants;\n\n  // Expose Shell constructor\n  this.Shell = Shell.bind(undefined, this);\n\n  // Safely expose the list of open files and file\n  // descriptor management functions\n  var openFiles = {};\n  var nextDescriptor = FIRST_DESCRIPTOR;\n  Object.defineProperty(this, \"openFiles\", {\n    get: function() { return openFiles; }\n  });\n  this.allocDescriptor = function(openFileDescription) {\n    var fd = nextDescriptor ++;\n    openFiles[fd] = openFileDescription;\n    return fd;\n  };\n  this.releaseDescriptor = function(fd) {\n    delete openFiles[fd];\n  };\n\n  // Safely expose the operation queue\n  var queue = [];\n  this.queueOrRun = function(operation) {\n    var error;\n\n    if(FS_READY == fs.readyState) {\n      operation.call(fs);\n    } else if(FS_ERROR == fs.readyState) {\n      error = new Errors.EFILESYSTEMERROR('unknown error');\n    } else {\n      queue.push(operation);\n    }\n\n    return error;\n  };\n  function runQueued() {\n    queue.forEach(function(operation) {\n      operation.call(this);\n    }.bind(fs));\n    queue = null;\n  }\n\n  // We support the optional `options` arg from node, but ignore it\n  this.watch = function(filename, options, listener) {\n    if(isNullPath(filename)) {\n      throw new Error('Path must be a string without null bytes.');\n    }\n    if(typeof options === 'function') {\n      listener = options;\n      options = {};\n    }\n    options = options || {};\n    listener = listener || nop;\n\n    var watcher = new FSWatcher();\n    watcher.start(filename, false, options.recursive);\n    watcher.on('change', listener);\n\n    return watcher;\n  };\n\n  // Deal with various approaches to node ID creation\n  function wrappedGuidFn(context) {\n    return function(callback) {\n      // Skip the duplicate ID check if asked to\n      if(_(flags).contains(FS_NODUPEIDCHECK)) {\n        callback(null, guid());\n        return;\n      }\n\n      // Otherwise (default) make sure this id is unused first\n      function guidWithCheck(callback) {\n        var id = guid();\n        context.getObject(id, function(err, value) {\n          if(err) {\n            callback(err);\n            return;\n          }\n\n          // If this id is unused, use it, otherwise find another\n          if(!value) {\n            callback(null, id);\n          } else {\n            guidWithCheck(callback);\n          }\n        });\n      }\n      guidWithCheck(callback);\n    };\n  }\n\n  // Let other instances (in this or other windows) know about\n  // any changes to this fs instance.\n  function broadcastChanges(changes) {\n    if(!changes.length) {\n      return;\n    }\n    var intercom = Intercom.getInstance();\n    changes.forEach(function(change) {\n      intercom.emit(change.event, change.path);\n    });\n  }\n\n  // Open file system storage provider\n  provider.open(function(err) {\n    function complete(error) {\n      function wrappedContext(methodName) {\n        var context = provider[methodName]();\n        context.flags = flags;\n        context.changes = [];\n        context.guid = wrappedGuidFn(context);\n\n        // When the context is finished, let the fs deal with any change events\n        context.close = function() {\n          var changes = context.changes;\n          broadcastChanges(changes);\n          changes.length = 0;\n        };\n\n        return context;\n      }\n\n      // Wrap the provider so we can extend the context with fs flags and\n      // an array of changes (e.g., watch event 'change' and 'rename' events\n      // for paths updated during the lifetime of the context). From this\n      // point forward we won't call open again, so it's safe to drop it.\n      fs.provider = {\n        openReadWriteContext: function() {\n          return wrappedContext('getReadWriteContext');\n        },\n        openReadOnlyContext: function() {\n          return wrappedContext('getReadOnlyContext');\n        }\n      };\n\n      if(error) {\n        fs.readyState = FS_ERROR;\n      } else {\n        fs.readyState = FS_READY;\n      }\n      runQueued();\n      callback(error, fs);\n    }\n\n    if(err) {\n      return complete(err);\n    }\n\n    var context = provider.getReadWriteContext();\n    context.guid = wrappedGuidFn(context);\n\n    // Mount the filesystem, formatting if necessary\n    if(forceFormatting) {\n      // Wipe the storage provider, then write root block\n      context.clear(function(err) {\n        if(err) {\n          return complete(err);\n        }\n        impl.ensureRootDirectory(context, complete);\n      });\n    } else {\n      // Use existing (or create new) root and mount\n      impl.ensureRootDirectory(context, complete);\n    }\n  });\n}\n\n// Expose storage providers on FileSystem constructor\nFileSystem.providers = providers;\n\n/**\n * Public API for FileSystem\n */\n[\n  'open',\n  'chmod',\n  'fchmod',\n  'chown',\n  'fchown',\n  'close',\n  'mknod',\n  'mkdir',\n  'rmdir',\n  'stat',\n  'fstat',\n  'link',\n  'unlink',\n  'read',\n  'readFile',\n  'write',\n  'writeFile',\n  'appendFile',\n  'exists',\n  'lseek',\n  'readdir',\n  'rename',\n  'readlink',\n  'symlink',\n  'lstat',\n  'truncate',\n  'ftruncate',\n  'utimes',\n  'futimes',\n  'setxattr',\n  'getxattr',\n  'fsetxattr',\n  'fgetxattr',\n  'removexattr',\n  'fremovexattr'\n].forEach(function(methodName) {\n  FileSystem.prototype[methodName] = function() {\n    var fs = this;\n    var args = Array.prototype.slice.call(arguments, 0);\n    var lastArgIndex = args.length - 1;\n\n    // We may or may not get a callback, and since node.js supports\n    // fire-and-forget style fs operations, we have to dance a bit here.\n    var missingCallback = typeof args[lastArgIndex] !== 'function';\n    var callback = maybeCallback(args[lastArgIndex]);\n\n    var error = fs.queueOrRun(function() {\n      var context = fs.provider.openReadWriteContext();\n\n      // Fail early if the filesystem is in an error state (e.g.,\n      // provider failed to open.\n      if(FS_ERROR === fs.readyState) {\n        var err = new Errors.EFILESYSTEMERROR('filesystem unavailable, operation canceled');\n        return callback.call(fs, err);\n      }\n\n      // Wrap the callback so we can explicitly close the context\n      function complete() {\n        context.close();\n        callback.apply(fs, arguments);\n      }\n\n      // Either add or replace the callback with our wrapper complete()\n      if(missingCallback) {\n        args.push(complete);\n      } else {\n        args[lastArgIndex] = complete;\n      }\n\n      // Forward this call to the impl's version, using the following\n      // call signature, with complete() as the callback/last-arg now:\n      // fn(fs, context, arg0, arg1, ... , complete);\n      var fnArgs = [fs, context].concat(args);\n      impl[methodName].apply(null, fnArgs);\n    });\n    if(error) {\n      callback(error);\n    }\n  };\n});\n\nmodule.exports = FileSystem;\n","module.exports = {\n  FileSystem: require('./filesystem/interface.js'),\n  Buffer: require('./buffer.js'),\n  Path: require('./path.js'),\n  Errors: require('./errors.js'),\n  Shell: require('./shell/shell.js')\n};\n"]}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index c887d1a..5393e6f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,152 +1,29 @@
 {
   "name": "filer",
-<<<<<<< HEAD
-<<<<<<< HEAD
   "version": "0.0.44",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
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-      "resolved": "https://registry.npmjs.org/JSONStream/-/JSONStream-1.3.2.tgz",
-      "integrity": "sha1-wQI3G27Dp887hHygDCC7D85Mbeo=",
+    "@mrmlnc/readdir-enhanced": {
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+      "resolved": "https://registry.npmjs.org/@mrmlnc/readdir-enhanced/-/readdir-enhanced-2.2.1.tgz",
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       "dev": true,
       "requires": {
-        "jsonparse": "^1.2.0",
-        "through": ">=2.2.7 <3"
+        "call-me-maybe": "^1.0.1",
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+      "dev": true
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-=======
-  "version": "0.0.29",
-=======
-  "version": "0.0.44",
->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
-  "lockfileVersion": 1,
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-  "dependencies": {
     "abbrev": {
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-      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.9.tgz",
-      "integrity": "sha1-kbR5JYinc4wl813W9jdSovh3YTU=",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
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       "dev": true
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@@ -161,19 +38,19 @@
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       "dev": true,
       "requires": {
-        "acorn": "5.7.1"
+        "acorn": "^5.0.3"
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+      "version": "6.5.2",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.5.2.tgz",
+      "integrity": "sha512-hOs7GfvI6tUI1LfZddH82ky6mOMyTuY0mk7kE2pWpmhhUSkumzaTO5vbVwij39MdwPQWCV4Zv57Eo06NtL/GVA==",
       "dev": true,
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-        "fast-json-stable-stringify": "2.0.0",
-        "json-schema-traverse": "0.4.1",
-        "uri-js": "4.2.2"
+        "fast-deep-equal": "^2.0.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.1"
       }
     },
     "ajv-keywords": {
@@ -207,12 +84,12 @@
       "dev": true
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+      "version": "0.6.6",
+      "resolved": "https://registry.npmjs.org/ansi-to-html/-/ansi-to-html-0.6.6.tgz",
+      "integrity": "sha512-90M/2sZna3OsoOEbSyXK46poFnlClBC53Rx6etNKQK7iShsX5fI5E/M9Ld6FurtLaxAWLuAPi0Jp8p3y5oAkxg==",
       "dev": true,
       "requires": {
-        "entities": "1.1.1"
+        "entities": "^1.1.1"
       }
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@@ -221,309 +98,24 @@
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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-<<<<<<< HEAD
+      "dev": true,
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-=======
-      "dev": true,
-      "requires": {
-        "sprintf-js": "1.0.3"
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-      }
+      "version": "4.0.0",
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@@ -531,39 +123,6 @@
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-=======
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@@ -576,7 +135,7 @@
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       "dev": true,
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@@ -585,12 +144,17 @@
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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-<<<<<<< HEAD
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@@ -680,7 +204,6 @@
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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@@ -688,110 +211,6 @@
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-<<<<<<< HEAD
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-=======
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@@ -810,12 +229,12 @@
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@@ -824,8 +243,29 @@
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           "dev": true,
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-            "electron-to-chromium": "1.3.50"
+            "caniuse-db": "^1.0.30000639",
+            "electron-to-chromium": "^1.2.7"
+          }
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+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
+          "dev": true,
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+            "escape-string-regexp": "^1.0.2",
+            "has-ansi": "^2.0.0",
+            "strip-ansi": "^3.0.0",
+            "supports-color": "^2.0.0"
+          },
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+              "dev": true
+            }
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@@ -840,10 +280,25 @@
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-            "supports-color": "3.2.3"
+            "chalk": "^1.1.3",
+            "js-base64": "^2.1.9",
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+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
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+          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+          "dev": true,
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@@ -852,7 +307,7 @@
           "integrity": "sha1-ZawFBLOVQXHYpklGsq48u4pfVPY=",
           "dev": true,
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+            "has-flag": "^1.0.0"
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@@ -863,9 +318,33 @@
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-        "js-tokens": "3.0.2"
+        "chalk": "^1.1.3",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.2"
+      },
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+          "dev": true,
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+            "has-ansi": "^2.0.0",
+            "strip-ansi": "^3.0.0",
+            "supports-color": "^2.0.0"
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+          "dev": true,
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-        "slash": "1.0.0",
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+          "dev": true,
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@@ -901,187 +403,740 @@
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-        "source-map": "0.5.7",
-        "trim-right": "1.0.1"
+        "babel-messages": "^6.23.0",
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+        "babel-types": "^6.26.0",
+        "detect-indent": "^4.0.0",
+        "jsesc": "^1.3.0",
+        "lodash": "^4.17.4",
+        "source-map": "^0.5.7",
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-          "integrity": "sha1-RsP+yMGJKxKwgz25vHYiF226s0s=",
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
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-<<<<<<< HEAD
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->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
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->>>>>>> Fix tests so they work and pass with Parcel.js, updated outdated, remove .babelrc
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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-          "bundled": true,
-          "dev": true,
-          "requires": {
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
             "concat-map": "0.0.1"
           }
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@@ -4912,11 +2925,7 @@
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-<<<<<<< HEAD
-          "version": "0.4.2",
-=======
           "version": "0.5.1",
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
           "bundled": true,
           "dev": true,
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@@ -4939,11 +2948,7 @@
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           "optional": true,
           "requires": {
-<<<<<<< HEAD
             "minipass": "^2.2.1"
-=======
-            "minipass": "2.2.4"
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
           }
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@@ -4958,7 +2963,6 @@
           "dev": true,
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-<<<<<<< HEAD
             "aproba": "^1.0.3",
             "console-control-strings": "^1.0.0",
             "has-unicode": "^2.0.0",
@@ -4967,16 +2971,6 @@
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-=======
-            "aproba": "1.2.0",
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-            "wide-align": "1.1.2"
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
           }
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@@ -4985,21 +2979,12 @@
           "dev": true,
           "optional": true,
           "requires": {
-<<<<<<< HEAD
             "fs.realpath": "^1.0.0",
             "inflight": "^1.0.4",
             "inherits": "2",
             "minimatch": "^3.0.4",
             "once": "^1.3.0",
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-=======
-            "fs.realpath": "1.0.0",
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-            "minimatch": "3.0.4",
-            "once": "1.4.0",
-            "path-is-absolute": "1.0.1"
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
           }
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@@ -5012,7 +2997,6 @@
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           "bundled": true,
           "dev": true,
-<<<<<<< HEAD
           "optional": true,
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@@ -5119,7 +3103,7 @@
           }
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+          "version": "0.10.0",
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@@ -5228,12 +3212,12 @@
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+          "version": "1.2.7",
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-            "deep-extend": "~0.4.0",
+            "deep-extend": "^0.5.1",
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@@ -5318,20 +3302,10 @@
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-=======
-          "optional": true,
-          "requires": {
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-          }
-        },
-        "ignore-walk": {
-          "version": "3.0.1",
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
           "bundled": true,
           "dev": true,
           "optional": true,
           "requires": {
-<<<<<<< HEAD
             "safe-buffer": "~5.1.0"
           }
         },
@@ -5345,33 +3319,10 @@
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           "version": "2.0.1",
-=======
-            "minimatch": "3.0.4"
-          }
-        },
-        "inflight": {
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-          "bundled": true,
-          "dev": true,
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-          "requires": {
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-          "bundled": true,
-          "dev": true
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-        "ini": {
-          "version": "1.3.5",
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
           "bundled": true,
           "dev": true,
           "optional": true
         },
-<<<<<<< HEAD
         "tar": {
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           "bundled": true,
@@ -5389,23 +3340,10 @@
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-=======
-        "is-fullwidth-code-point": {
-          "version": "1.0.0",
-          "bundled": true,
-          "dev": true,
-          "requires": {
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-          }
-        },
-        "isarray": {
-          "version": "1.0.0",
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
           "bundled": true,
           "dev": true,
           "optional": true
         },
-<<<<<<< HEAD
         "wide-align": {
           "version": "1.1.2",
           "bundled": true,
@@ -5427,1481 +3365,13 @@
         }
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
+            "is-buffer": "^1.1.5"
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@@ -7697,12 +4066,12 @@
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@@ -7711,19 +4080,25 @@
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@@ -7762,8 +4137,8 @@
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-          "dev": true,
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-          }
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@@ -7979,16 +4195,33 @@
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       "dev": true,
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+          "dev": true,
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@@ -7998,18 +4231,43 @@
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-      "integrity": "sha1-hut1OSgF3cM69xySoO7fdO52BLI=",
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+          "dev": true,
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@@ -8024,134 +4282,44 @@
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
           "dev": true
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-<<<<<<< HEAD
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@@ -8160,6 +4328,41 @@
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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+      "resolved": "https://registry.npmjs.org/js-base64/-/js-base64-2.4.6.tgz",
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       "dev": true
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@@ -8610,10 +4486,10 @@
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       "dev": true,
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-        "config-chain": "1.1.11",
-        "editorconfig": "0.13.3",
-        "mkdirp": "0.5.1",
-        "nopt": "3.0.6"
+        "config-chain": "~1.1.5",
+        "editorconfig": "^0.13.2",
+        "mkdirp": "~0.5.0",
+        "nopt": "~3.0.1"
       }
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@@ -8628,22 +4504,20 @@
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       "dev": true,
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-          "dev": true
-        }
+        "argparse": "^1.0.7",
+        "esprima": "^4.0.0"
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-      "version": "0.5.0",
-      "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
-      "integrity": "sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=",
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-1.3.0.tgz",
+      "integrity": "sha1-RsP+yMGJKxKwgz25vHYiF226s0s=",
+      "dev": true
+    },
+    "json-parse-better-errors": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/json-parse-better-errors/-/json-parse-better-errors-1.0.2.tgz",
+      "integrity": "sha512-mrqyZKfX5EhL7hvqcV6WG1yYjnjeuYDzDhhcAAUrq8Po85NBQBJP+ZDUT75qZQ98IkUoBqdkExkukOU7Ts2wrw==",
       "dev": true
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     "json-schema-traverse": {
@@ -8659,28 +4533,36 @@
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-      "resolved": "https://registry.npmjs.org/json5/-/json5-0.5.1.tgz",
-      "integrity": "sha1-Hq3nrMASA0rYTiOWdn6tn6VJWCE=",
-      "dev": true
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-      "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-1.0.1.tgz",
+      "integrity": "sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==",
       "dev": true,
       "requires": {
-        "is-buffer": "1.1.6"
+        "minimist": "^1.2.0"
+      },
+      "dependencies": {
+        "minimist": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+          "dev": true
+        }
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+    "kind-of": {
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
+      "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==",
+      "dev": true
+    },
     "levn": {
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       "resolved": "https://registry.npmjs.org/levn/-/levn-0.3.0.tgz",
       "integrity": "sha1-OwmSTt+fCDwEkP3UwLxEIeBHZO4=",
       "dev": true,
       "requires": {
-        "prelude-ls": "1.1.2",
-        "type-check": "0.3.2"
+        "prelude-ls": "~1.1.2",
+        "type-check": "~0.3.2"
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     "lodash": {
@@ -8695,6 +4577,12 @@
       "integrity": "sha1-GVhwRQ9aExkkeN9Lw9I9LeoZB7Y=",
       "dev": true
     },
+    "lodash.debounce": {
+      "version": "4.0.8",
+      "resolved": "https://registry.npmjs.org/lodash.debounce/-/lodash.debounce-4.0.8.tgz",
+      "integrity": "sha1-gteb/zCmfEAF/9XiUVMArZyk168=",
+      "dev": true
+    },
     "lodash.memoize": {
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       "resolved": "https://registry.npmjs.org/lodash.memoize/-/lodash.memoize-4.1.2.tgz",
@@ -8707,13 +4595,31 @@
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-      "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.3.1.tgz",
-      "integrity": "sha1-0aitM/qc4OcT1l/dCsi3SNR4yEg=",
+    "log-symbols": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/log-symbols/-/log-symbols-2.2.0.tgz",
+      "integrity": "sha512-VeIAFslyIerEJLXHziedo2basKbMKtTw3vfn5IzG0XTjhAVEJyNHnL2p7vc+wBDSdQuUpNw3M2u6xb9QsAY5Eg==",
       "dev": true,
       "requires": {
-        "js-tokens": "3.0.2"
+        "chalk": "^2.0.1"
+      }
+    },
+    "loose-envify": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
+      "integrity": "sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==",
+      "dev": true,
+      "requires": {
+        "js-tokens": "^3.0.0 || ^4.0.0"
+      }
+    },
+    "lru-cache": {
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+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-3.2.0.tgz",
+      "integrity": "sha1-cXibO39Tmb7IVl3aOKow0qCX7+4=",
+      "dev": true,
+      "requires": {
+        "pseudomap": "^1.0.1"
       }
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     "magic-string": {
@@ -8722,7 +4628,7 @@
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       "dev": true,
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+        "vlq": "^0.2.2"
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@@ -8737,7 +4643,7 @@
       "integrity": "sha1-7Nyo8TFE5mDxtb1B8S80edmN+48=",
       "dev": true,
       "requires": {
-        "object-visit": "1.0.1"
+        "object-visit": "^1.0.0"
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@@ -8752,8 +4658,8 @@
       "integrity": "sha1-6b296UogpawYsENA/Fdk1bCdkB0=",
       "dev": true,
       "requires": {
-        "hash-base": "3.0.4",
-        "inherits": "2.0.3"
+        "hash-base": "^3.0.0",
+        "inherits": "^2.0.1"
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@@ -8768,8 +4674,42 @@
       "integrity": "sha1-pd5GU42uhNQRTMXqArR3KmNGcB8=",
       "dev": true,
       "requires": {
-        "source-map": "0.5.7"
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
+        "source-map": "^0.5.6"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
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+      }
+    },
+    "merge2": {
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+      "resolved": "https://registry.npmjs.org/merge2/-/merge2-1.2.2.tgz",
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+      "dev": true
+    },
+    "micromatch": {
+      "version": "3.1.10",
+      "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-3.1.10.tgz",
+      "integrity": "sha512-MWikgl9n9M3w+bpsY3He8L+w9eF9338xRl8IAO5viDizwSzziFEyUzo2xrrloB64ADbTf8uA8vRqqttDTOmccg==",
+      "dev": true,
+      "requires": {
+        "arr-diff": "^4.0.0",
+        "array-unique": "^0.3.2",
+        "braces": "^2.3.1",
+        "define-property": "^2.0.2",
+        "extend-shallow": "^3.0.2",
+        "extglob": "^2.0.4",
+        "fragment-cache": "^0.2.1",
+        "kind-of": "^6.0.2",
+        "nanomatch": "^1.2.9",
+        "object.pick": "^1.3.0",
+        "regex-not": "^1.0.0",
+        "snapdragon": "^0.8.1",
+        "to-regex": "^3.0.2"
       }
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     "miller-rabin": {
@@ -8778,37 +4718,21 @@
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       "dev": true,
       "requires": {
-<<<<<<< HEAD
         "bn.js": "^4.0.0",
         "brorand": "^1.0.1"
       }
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     "mime": {
-      "version": "1.2.11",
-      "resolved": "https://registry.npmjs.org/mime/-/mime-1.2.11.tgz",
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-      "integrity": "sha1-mVrhOSq4r/y/yyZB3QVOlDwNXc4="
-=======
-        "bn.js": "4.11.8",
-        "brorand": "1.1.0"
-      }
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-1.4.1.tgz",
+      "integrity": "sha512-KI1+qOZu5DcW6wayYHSzR/tXKCDC5Om4s1z2QJjDULzLcmf3DvzS7oluY4HCTrc+9FiKmWUgeNLg7W3uIQvxtQ==",
+      "dev": true
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       "dev": true
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     },
     "minimalistic-assert": {
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@@ -8823,128 +4747,11 @@
       "dev": true
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-<<<<<<< HEAD
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-1.0.0.tgz",
-      "integrity": "sha1-4N0hILSeG3JM6NcUxSCCKpQ4V20=",
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-      "integrity": "sha1-gAhI+PeITGHu/PoqJzBLqeVEbQs=",
-      "dev": true,
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-=======
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+        "brace-expansion": "^1.1.7"
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@@ -8959,8 +4766,8 @@
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       "dev": true,
       "requires": {
-        "for-in": "1.0.2",
-        "is-extendable": "1.0.1"
+        "for-in": "^1.0.2",
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@@ -8969,7 +4776,7 @@
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           "dev": true,
           "requires": {
-            "is-plain-object": "2.0.4"
+            "is-plain-object": "^2.0.4"
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@@ -9002,95 +4809,17 @@
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-          "dev": true,
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-          "dev": true,
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-            "inflight": "1.0.6",
-            "inherits": "2.0.3",
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-            "once": "1.4.0",
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-          }
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           "dev": true,
           "requires": {
-            "has-flag": "3.0.0"
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
+            "has-flag": "^3.0.0"
           }
         }
       }
     },
-<<<<<<< HEAD
-    "morgan": {
-      "version": "1.6.1",
-      "resolved": "https://registry.npmjs.org/morgan/-/morgan-1.6.1.tgz",
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-=======
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       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -9102,37 +4831,11 @@
       "resolved": "https://registry.npmjs.org/mute-stream/-/mute-stream-0.0.7.tgz",
       "integrity": "sha1-MHXOk7whuPq0PhvE2n6BFe0ee6s=",
       "dev": true
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     },
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-<<<<<<< HEAD
-      "dev": true,
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-      "integrity": "sha1-sEDrCSOWivq/jTL7HxfxFn/auQc="
-=======
       "dev": true
     },
     "nanomatch": {
@@ -9141,37 +4844,17 @@
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-          "dev": true
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+        "arr-diff": "^4.0.0",
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+        "snapdragon": "^0.8.1",
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@@ -9198,225 +4881,66 @@
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+        "crypto-browserify": "^3.11.0",
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+        "process": "^0.11.10",
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-              "dev": true
-            }
-          }
         }
       }
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
+    },
+    "node-releases": {
+      "version": "1.0.0-alpha.10",
+      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-1.0.0-alpha.10.tgz",
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+      "dev": true,
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-<<<<<<< HEAD
+      "dev": true,
       "requires": {
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       }
     },
-    "normalize-package-data": {
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-      "resolved": "https://registry.npmjs.org/normalize-package-data/-/normalize-package-data-2.4.0.tgz",
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-        "validate-npm-package-license": "^3.0.1"
-=======
-      "dev": true,
-      "requires": {
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-      }
-    },
     "normalize-path": {
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       "dev": true,
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-<<<<<<< HEAD
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-=======
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@@ -9424,16 +4948,10 @@
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-      "integrity": "sha1-LMDWazHqIwNkWENuNiDYWVTGbDw=",
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-        "prepend-http": "1.0.4",
-        "query-string": "4.3.4",
-        "sort-keys": "1.1.2"
-      }
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/normalize-url/-/normalize-url-3.2.0.tgz",
+      "integrity": "sha512-WvF3Myk0NhXkG8S9bygFM4IC1KOvnVJGq0QoGeoqOYOBeinBZp5ybW3QuYbTc89lkWBMM9ZBO4QGRoc0353kKA==",
+      "dev": true
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@@ -9441,7 +4959,7 @@
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       "dev": true,
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-        "boolbase": "1.0.0"
+        "boolbase": "~1.0.0"
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     "num2fraction": {
@@ -9450,39 +4968,12 @@
       "integrity": "sha1-b2gragJ6Tp3fpFZM0lidHU5mnt4=",
       "dev": true
     },
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     "number-is-nan": {
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       "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.1.tgz",
       "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0=",
       "dev": true
     },
-<<<<<<< HEAD
-    "oauth-sign": {
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-      "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.5.0.tgz",
-      "integrity": "sha1-12f1FpMlYg6rLgh+8MRy53PbZGE="
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-    "object.omit": {
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-      "integrity": "sha1-Gpx0SCnznbuFjHbKNXmuKlTr0fo=",
-      "dev": true,
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-=======
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@@ -9495,9 +4986,9 @@
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       "dev": true,
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-        "define-property": "0.2.5",
-        "kind-of": "3.2.2"
+        "copy-descriptor": "^0.1.0",
+        "define-property": "^0.2.5",
+        "kind-of": "^3.0.3"
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@@ -9506,7 +4997,16 @@
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           "dev": true,
           "requires": {
-            "is-descriptor": "0.1.6"
+            "is-descriptor": "^0.1.0"
+          }
+        },
+        "kind-of": {
+          "version": "3.2.2",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
+          "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+          "dev": true,
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@@ -9540,8 +5038,8 @@
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@@ -9550,15 +5048,7 @@
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@@ -9567,11 +5057,10 @@
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
+        "define-properties": "^1.1.2",
+        "es-abstract": "^1.6.1",
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-=======
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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-<<<<<<< HEAD
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@@ -9760,443 +5152,73 @@
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+        "strip-ansi": "^4.0.0",
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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       "dev": true,
       "requires": {
-<<<<<<< HEAD
         "asn1.js": "^4.0.0",
         "browserify-aes": "^1.0.0",
         "create-hash": "^1.1.0",
@@ -10204,32 +5226,14 @@
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-      "dev": true,
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-      "integrity": "sha1-9ID0BDTvgHQfhGkJn43qGPVaTck=",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/parse-json/-/parse-json-4.0.0.tgz",
+      "integrity": "sha1-vjX1Qlvh9/bHRxhPmKeIy5lHfuA=",
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-=======
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-        "create-hash": "1.2.0",
-        "evp_bytestokey": "1.0.3",
-        "pbkdf2": "3.0.16"
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
+        "error-ex": "^1.3.1",
+        "json-parse-better-errors": "^1.0.1"
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@@ -10238,34 +5242,23 @@
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       "dev": true
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-<<<<<<< HEAD
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-      "resolved": "https://registry.npmjs.org/path-browserify/-/path-browserify-0.0.0.tgz",
-      "integrity": "sha1-oLhwcpquIUAFt9UDLsLLuw+0RRo=",
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-      "dev": true,
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-=======
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       "dev": true
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+    "path-browserify": {
+      "version": "0.0.0",
+      "resolved": "https://registry.npmjs.org/path-browserify/-/path-browserify-0.0.0.tgz",
+      "integrity": "sha1-oLhwcpquIUAFt9UDLsLLuw+0RRo=",
+      "dev": true
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       "integrity": "sha1-zDPSTVJeCZpTiMAzbG4yuRYGCeA=",
       "dev": true
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     },
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@@ -10273,8 +5266,6 @@
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-<<<<<<< HEAD
-=======
     "path-is-inside": {
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       "resolved": "https://registry.npmjs.org/path-is-inside/-/path-is-inside-1.0.2.tgz",
@@ -10287,49 +5278,16 @@
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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       "dev": true
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-<<<<<<< HEAD
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-      "resolved": "https://registry.npmjs.org/path-platform/-/path-platform-0.11.15.tgz",
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-      "dev": true,
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-=======
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
       "dev": true
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@@ -10338,7 +5296,6 @@
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       "dev": true,
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-<<<<<<< HEAD
         "create-hash": "^1.1.2",
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@@ -10346,43 +5303,12 @@
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-=======
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-          "dev": true,
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       "dev": true
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     "pify": {
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       "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
@@ -10401,284 +5327,9 @@
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       "dev": true,
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-<<<<<<< HEAD
         "pinkie": "^2.0.0"
       }
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
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@@ -12923,37 +6334,20 @@
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+        "graceful-fs": "^4.1.2",
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-      "integrity": "sha1-dHyRTgSWFKTJz7umKYca0dKSdxY=",
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-          "dev": true
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@@ -12962,7 +6356,7 @@
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       "dev": true,
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+        "extend-shallow": "^3.0.2",
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@@ -13027,9 +6421,9 @@
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@@ -13044,7 +6438,15 @@
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@@ -13071,7 +6473,7 @@
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@@ -13080,8 +6482,8 @@
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+        "glob": "^7.0.5"
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+      "dev": true,
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@@ -13142,7 +6566,7 @@
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       "dev": true,
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@@ -13166,7 +6590,7 @@
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       "dev": true,
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+        "ret": "~0.1.10"
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@@ -13181,7 +6605,7 @@
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+        "clones": "^1.1.0"
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@@ -13196,14 +6620,46 @@
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+        "depd": "~1.1.2",
+        "destroy": "~1.0.4",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
+        "fresh": "0.5.2",
+        "http-errors": "~1.6.2",
+        "mime": "1.4.1",
+        "ms": "2.0.0",
+        "on-finished": "~2.3.0",
+        "range-parser": "~1.2.0",
+        "statuses": "~1.4.0"
+      },
+      "dependencies": {
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+          "dev": true,
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-        "safer-eval": "1.2.3"
+        "js-beautify": "^1.7.5",
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@@ -13212,80 +6668,12 @@
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-          "dev": true
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-          "dev": true,
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-            "ms": "2.0.0",
-            "on-finished": "2.3.0",
-            "range-parser": "1.2.0",
-            "statuses": "1.4.0"
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-          }
-        }
       }
     },
-<<<<<<< HEAD
-    "typedarray": {
-      "version": "0.0.6",
-      "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
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-=======
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@@ -13298,10 +6686,10 @@
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+        "extend-shallow": "^2.0.1",
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@@ -13310,113 +6698,11 @@
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           "dev": true,
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
+            "is-extendable": "^0.1.0"
           }
         }
       }
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-<<<<<<< HEAD
-    "uglify-to-browserify": {
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-=======
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@@ -13429,6 +6715,16 @@
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@@ -13441,7 +6737,7 @@
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       "dev": true,
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+        "shebang-regex": "^1.0.0"
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@@ -13462,6 +6758,23 @@
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+      "integrity": "sha1-pNprY1/8zMoz9w0Xy5JZLeleVXo=",
+      "dev": true,
+      "requires": {
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+          "dev": true
+        }
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->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-          "dev": true
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-<<<<<<< HEAD
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+          "dev": true,
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@@ -13773,13 +6918,13 @@
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@@ -14361,6 +7126,41 @@
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+        "ajv": "^6.0.1",
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-          "dev": true
+        "source-map-support": {
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+          "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.6.tgz",
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+          "dev": true,
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@@ -14493,6 +7262,31 @@
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       "dev": true
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+      "resolved": "https://registry.npmjs.org/through2/-/through2-2.0.3.tgz",
+      "integrity": "sha1-AARWmzfHx0ujnEPzzteNGtlBQL4=",
+      "dev": true,
+      "requires": {
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+        "xtend": "~4.0.1"
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+    "timers-browserify": {
+      "version": "2.0.10",
+      "resolved": "https://registry.npmjs.org/timers-browserify/-/timers-browserify-2.0.10.tgz",
+      "integrity": "sha512-YvC1SV1XdOUaL6gx5CoGroT3Gu49pK9+TZ38ErPldOWW4j49GI1HKs9DV+KGq/w6y+LZ72W1c8cKz2vzY+qpzg==",
+      "dev": true,
+      "requires": {
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+      }
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+    "timsort": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/timsort/-/timsort-0.3.0.tgz",
+      "integrity": "sha1-QFQRqOfmM5/mTbmiNN4R3DHgK9Q=",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/tiny-inflate/-/tiny-inflate-1.0.2.tgz",
@@ -14505,7 +7299,7 @@
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       "dev": true,
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-        "os-tmpdir": "1.0.2"
+        "os-tmpdir": "~1.0.2"
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@@ -14526,7 +7320,18 @@
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       "dev": true,
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-        "kind-of": "3.2.2"
+        "kind-of": "^3.0.2"
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+      "dependencies": {
+        "kind-of": {
+          "version": "3.2.2",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
+          "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+          "dev": true,
+          "requires": {
+            "is-buffer": "^1.1.5"
+          }
+        }
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@@ -14535,10 +7340,10 @@
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       "dev": true,
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-        "extend-shallow": "3.0.2",
-        "regex-not": "1.0.2",
-        "safe-regex": "1.1.0"
+        "define-property": "^2.0.2",
+        "extend-shallow": "^3.0.2",
+        "regex-not": "^1.0.2",
+        "safe-regex": "^1.1.0"
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@@ -14547,19 +7352,8 @@
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       "dev": true,
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-          "dev": true,
-          "requires": {
-            "kind-of": "3.2.2"
-          }
-        }
+        "is-number": "^3.0.0",
+        "repeat-string": "^1.6.1"
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@@ -14580,13 +7374,19 @@
       "integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=",
       "dev": true
     },
+    "tty-browserify": {
+      "version": "0.0.0",
+      "resolved": "https://registry.npmjs.org/tty-browserify/-/tty-browserify-0.0.0.tgz",
+      "integrity": "sha1-oVe6QC2iTpv5V/mqadUk7tQpAaY=",
+      "dev": true
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       "dev": true,
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-        "prelude-ls": "1.1.2"
+        "prelude-ls": "~1.1.2"
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@@ -14601,14 +7401,32 @@
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       "dev": true
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+    "uglify-es": {
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+      "resolved": "https://registry.npmjs.org/uglify-es/-/uglify-es-3.3.9.tgz",
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+      "dev": true,
+      "requires": {
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+        "source-map": "~0.6.1"
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+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.13.0.tgz",
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+          "dev": true
+        }
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       "dev": true,
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-        "pako": "0.2.9",
-        "tiny-inflate": "1.0.2"
+        "pako": "^0.2.5",
+        "tiny-inflate": "^1.0.0"
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@@ -14617,10 +7435,10 @@
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-        "is-extendable": "0.1.1",
-        "set-value": "0.4.3"
+        "arr-union": "^3.1.0",
+        "get-value": "^2.0.6",
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@@ -14629,7 +7447,7 @@
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           "dev": true,
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-            "is-extendable": "0.1.1"
+            "is-extendable": "^0.1.0"
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@@ -14638,10 +7456,10 @@
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-            "is-plain-object": "2.0.4",
-            "to-object-path": "0.3.0"
+            "extend-shallow": "^2.0.1",
+            "is-extendable": "^0.1.1",
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@@ -14670,8 +7488,8 @@
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-        "has-value": "0.3.1",
-        "isobject": "3.0.1"
+        "has-value": "^0.3.1",
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@@ -14680,9 +7498,9 @@
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           "dev": true,
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-            "has-values": "0.1.4",
-            "isobject": "2.1.0"
+            "get-value": "^2.0.3",
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@@ -14701,48 +7519,9 @@
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-          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
-          "dev": true
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-<<<<<<< HEAD
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-      "integrity": "sha1-X6VeAr58qTTt/BJmVjLoSbcuUgk=",
-      "requires": {
-        "semver": "^5.0.1"
-      },
-      "dependencies": {
-        "semver": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-5.5.0.tgz",
-          "integrity": "sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA=="
-        }
-      }
-    },
-    "window-size": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.0.tgz",
-      "integrity": "sha1-VDjNLqk7IC76Ohn+iIeu58lPnJ0=",
-      "dev": true
-    },
-    "wordwrap": {
-      "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
-      "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc="
-=======
     "upath": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/upath/-/upath-1.1.0.tgz",
@@ -14755,15 +7534,7 @@
       "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
       "dev": true,
       "requires": {
-        "punycode": "2.1.1"
-      },
-      "dependencies": {
-        "punycode": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
-          "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==",
-          "dev": true
-        }
+        "punycode": "^2.1.0"
       }
     },
     "urix": {
@@ -14772,23 +7543,30 @@
       "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
       "dev": true
     },
-    "use": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/use/-/use-3.1.0.tgz",
-      "integrity": "sha512-6UJEQM/L+mzC3ZJNM56Q4DFGLX/evKGRg15UJHGB9X5j5Z3AFbgZvjUh2yq/UJUY4U5dh7Fal++XbNg1uzpRAw==",
+    "url": {
+      "version": "0.11.0",
+      "resolved": "https://registry.npmjs.org/url/-/url-0.11.0.tgz",
+      "integrity": "sha1-ODjpfPxgUh63PFJajlW/3Z4uKPE=",
       "dev": true,
       "requires": {
-        "kind-of": "6.0.2"
+        "punycode": "1.3.2",
+        "querystring": "0.2.0"
       },
       "dependencies": {
-        "kind-of": {
-          "version": "6.0.2",
-          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
-          "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==",
+        "punycode": {
+          "version": "1.3.2",
+          "resolved": "https://registry.npmjs.org/punycode/-/punycode-1.3.2.tgz",
+          "integrity": "sha1-llOgNvt8HuQjQvIyXM7v6jkmxI0=",
           "dev": true
         }
       }
     },
+    "use": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/use/-/use-3.1.1.tgz",
+      "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==",
+      "dev": true
+    },
     "util": {
       "version": "0.10.4",
       "resolved": "https://registry.npmjs.org/util/-/util-0.10.4.tgz",
@@ -14810,8 +7588,8 @@
       "integrity": "sha512-i+6qA2MPhvoKLuxnJNpXAGhg7HphQOSUq2LKMZD0m15EiskXUkMvKdF4Uui0WYeCUGea+o2cw/ZuwehtfsrNkA==",
       "dev": true,
       "requires": {
-        "define-properties": "1.1.2",
-        "object.getownpropertydescriptors": "2.0.3"
+        "define-properties": "^1.1.2",
+        "object.getownpropertydescriptors": "^2.0.3"
       }
     },
     "v8-compile-cache": {
@@ -14841,52 +7619,39 @@
         "indexof": "0.0.1"
       }
     },
+    "wcwidth": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/wcwidth/-/wcwidth-1.0.1.tgz",
+      "integrity": "sha1-8LDc+RW8X/FSivrbLA4XtTLaL+g=",
+      "dev": true,
+      "requires": {
+        "defaults": "^1.0.3"
+      }
+    },
     "whet.extend": {
       "version": "0.9.9",
       "resolved": "https://registry.npmjs.org/whet.extend/-/whet.extend-0.9.9.tgz",
       "integrity": "sha1-+HfVv2SMl+WqVC+twW1qJZucEaE=",
       "dev": true
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
+    },
+    "which": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+      "dev": true,
+      "requires": {
+        "isexe": "^2.0.0"
+      }
+    },
+    "wordwrap": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
+      "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=",
+      "dev": true
     },
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-<<<<<<< HEAD
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
-    },
-    "xdg-basedir": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-1.0.1.tgz",
-      "integrity": "sha1-FP+PY6T9vLBdW27qIrNvMDO58E4=",
-      "requires": {
-        "user-home": "^1.0.0"
-      }
-    },
-    "xtend": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
-      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
-    },
-    "yargs": {
-      "version": "3.10.0",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
-      "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
-      "dev": true,
-      "requires": {
-        "camelcase": "^1.0.2",
-        "cliui": "^2.1.0",
-        "decamelize": "^1.0.0",
-        "window-size": "0.1.0"
-      },
-      "dependencies": {
-        "camelcase": {
-          "version": "1.2.1",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
-          "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=",
-          "dev": true
-        }
-      }
-=======
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
@@ -14896,16 +7661,16 @@
       "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
       "dev": true,
       "requires": {
-        "mkdirp": "0.5.1"
+        "mkdirp": "^0.5.1"
       }
     },
     "ws": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-5.2.1.tgz",
-      "integrity": "sha512-2NkHdPKjDBj3CHdnAGNpmlliryKqF+n9MYXX7/wsVC4yqYocKreKNjydPDvT3wShAZnndlM0RytEfTALCDvz7A==",
+      "version": "5.2.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-5.2.2.tgz",
+      "integrity": "sha512-jaHFD6PFv6UgoIVda6qZllptQsMlDEJkTQcybzzXDYM1XO9Y8em691FGMPmM46WGyLU4z9KMgQN+qrux/nhlHA==",
       "dev": true,
       "requires": {
-        "async-limiter": "1.0.0"
+        "async-limiter": "~1.0.0"
       }
     },
     "xtend": {
@@ -14913,7 +7678,6 @@
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
       "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
       "dev": true
->>>>>>> Switch to parceljs for bundling, eslint for linting, drop grunt
     }
   }
 }
diff --git a/package.json b/package.json
index 8f57107..40b98e7 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "chai": "^4.1.2",
     "eslint": "^5.0.1",
     "mocha": "^5.2.0",
-    "parcel-bundler": "^1.9.3",
+    "parcel-bundler": "^1.9.6",
     "requirejs": "^2.3.5"
   },
   "main": "./src/index.js",
diff --git a/perf/index.js b/perf/index.js
index f7d9354..e4e2abe 100644
--- a/perf/index.js
+++ b/perf/index.js
@@ -1,4 +1,3 @@
-var Filer = require('..');
 var util = require('../tests/lib/test-utils.js');
 
 function setImmediate(cb) {
diff --git a/tests/index.html b/tests/index.html
index 7e68356..ce34122 100644
--- a/tests/index.html
+++ b/tests/index.html
@@ -8,12 +8,11 @@
  </head>
 <body>
   <div id="mocha"></div>
-
   <script src="../node_modules/chai/chai.js"></script>
   <script src="../node_modules/mocha/mocha.js"></script>
 
   <script>
-    mocha.setup('bdd').timeout(5000).slow(250);;
+    mocha.setup('bdd').timeout(5000).slow(250);
 
     window.onload = function() {
       mocha.checkLeaks();
diff --git a/tests/spec/fs.chmod.spec.js b/tests/spec/fs.chmod.spec.js
index 54d5484..fd66d3d 100644
--- a/tests/spec/fs.chmod.spec.js
+++ b/tests/spec/fs.chmod.spec.js
@@ -1,4 +1,4 @@
-var Filer = require('../..');
+var Filer = require('../../src');
 var util = require('../lib/test-utils.js');
 var expect = require('chai').expect;
 
diff --git a/tests/spec/fs.chown.spec.js b/tests/spec/fs.chown.spec.js
index aa72312..4dbe896 100644
--- a/tests/spec/fs.chown.spec.js
+++ b/tests/spec/fs.chown.spec.js
@@ -1,4 +1,4 @@
-var Filer = require('../..');
+var Filer = require('../../src');
 var util = require('../lib/test-utils.js');
 var expect = require('chai').expect;