[codeclimate] add badge

README.md

@@ -4,7 +4,7 @@ rendezvous
 ## Badge
 [![Build Status](https://travis-ci.org/tadyjp/rendezvous.png)](https://travis-ci.org/tadyjp/rendezvous)
 [![Coverage Status](https://coveralls.io/repos/tadyjp/rendezvous/badge.png)](https://coveralls.io/r/tadyjp/rendezvous)
-
+[![Code Climate](https://codeclimate.com/github/tadyjp/rendezvous.png)](https://codeclimate.com/github/tadyjp/rendezvous)
 
 ## ENVの設定