.travis.yml: add basic configuration
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..aa5bbe8
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,5 @@
+sudo: false
+language: go
+# TODO(light): Enable Go 1.6 (#2).
+go:
+- 1.x
diff --git a/README.md b/README.md
index b78f72f..41562b6 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Package for equality of Go values
 
 [![GoDoc](https://godoc.org/github.com/google/go-cmp/cmp?status.svg)][godoc]
+[![Build Status](https://travis-ci.org/google/go-cmp.svg?branch=master)][travis]
 
 This package is intended to be a more powerful and safer alternative to
 `reflect.DeepEqual` for comparing whether two values are semantically equal.
@@ -25,6 +26,7 @@
 This is not an official Google product.
 
 [godoc]: https://godoc.org/github.com/google/go-cmp/cmp
+[travis]: https://travis-ci.org/google/go-cmp
 
 ## Install