Add Travis bling

README.md

diff --git a/README.md b/README.md
index d985ade..4e1c31d 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![Build Status](https://travis-ci.org/pre-commit/pre-commit-hooks.svg?branch=master)](https://travis-ci.org/pre-commit/pre-commit-hooks)
+
 pre-commit-hooks
 ==========