Add Go 1.7 to Travis config

.travis.yml

diff --git a/.travis.yml b/.travis.yml
index 65be544..c24eebf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@
 go:

   - 1.5.4

   - 1.6.3

+  - 1.7

   - tip

 

 os:

@@ -13,6 +14,7 @@
 matrix:

   allow_failures:

     - go: tip

+  fast_finish: true

 

 script:

   - go test -v ./...