Added OSX and Linux builders to .travis.yml
Fixes #65
diff --git a/.travis.yml b/.travis.yml
index 6c4a65b..9f0315c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,9 @@
 language: go
 
+os:
+  - linux
+  - osx
+  
 go:
   - 1.7.1