README.md: Add codetriage badge

README.md

@@ -27,3 +27,4 @@ See docs for compilation instructions for every platform:
 http://docs.godotengine.org/en/latest/reference/_compiling.html
 
 [![Build Status](https://travis-ci.org/godotengine/godot.svg?branch=master)](https://travis-ci.org/godotengine/godot)
+[![Code Triagers Badge](http://www.codetriage.com/godotengine/godot/badges/users.svg)](http://www.codetriage.com/godotengine/godot)