Add Travis CI

.travis.yml

@@ -0,0 +1,14 @@
+language: go
+sudo: required
+go:
+  - 1.7.5
+  - 1.8
+  - tip
+os:
+  - linux
+matrix:
+  allow_failures:
+    - go: tip
+  fast_finish: true
+script:
+  - make check

README.md

@@ -1,6 +1,7 @@
 cast
 ====
 [![GoDoc](https://godoc.org/github.com/spf13/cast?status.svg)](https://godoc.org/github.com/spf13/cast)
+[![Build Status](https://api.travis-ci.org/spf13/cast.svg?branch=master)](https://travis-ci.org/spf13/cast)
 [![Go Report Card](https://goreportcard.com/badge/github.com/spf13/cast)](https://goreportcard.com/report/github.com/spf13/cast)
 
 Easy and safe casting from one type to another in Go