test if it works with golang 1.8

.travis.yml

@@ -2,7 +2,7 @@ sudo: required
 
 language: go
 go:
-    - 1.6
+    - 1.8
 
 before_install:
     - sudo apt-get install cgroup-bin

internal/version.go

@@ -1,3 +1,3 @@
 package internal
 
-const Version string = "0.2-dev"
+const Version string = "0.3.2-dev"