Drop support for testing on Go1.4 on Travis

The AWS Go SDK has dropped support Go1.4 in a recent commit
(0cec6f30ed).
Therefore, we decided to not test this unsupported Go version anymore.

.scripts/test_all.sh

@@ -8,8 +8,7 @@ packages=$(find ./ -maxdepth 2 -name '*.go' -printf '%h\n' | sort | uniq)
 # The consul package only supports Go1.7+ and therefore we will only run the
 # corresponding tests on these versions.
 goversion=$(go version)
-if [[ "$goversion" == *"go1.4"* ]] ||
-   [[ "$goversion" == *"go1.5"* ]] ||
+if [[ "$goversion" == *"go1.5"* ]] ||
    [[ "$goversion" == *"go1.6"* ]]; then
 
   echo "Skipping tests requiring Consul which is not supported on $goversion"

.travis.yml

@@ -1,10 +1,9 @@
 language: go
 go:
-- 1.4
 - 1.5
 - 1.6
 - 1.7
-- tip
+- 1.8beta2
 sudo: required
 cache:
   apt: true
@@ -20,7 +19,7 @@ matrix:
   allow_failures:
   - go: tip
 install:
-- rsync -r ./vendor/ $GOPATH/src
+- true
 script:
 - ./.scripts/test_all.sh
 before_deploy:

README.md

@@ -28,7 +28,7 @@ Windows in various formats of the
 
 **Requirements:**
 
-* [Go](http://golang.org/doc/install) (1.4 or newer)
+* [Go](http://golang.org/doc/install) (1.5 or newer)
 
 **Running tusd from source:**