Update README.md

Joohwan Oh · Joohwan Oh · commit 2558b1b42fc9 · 2015-01-13T14:07:06.000-05:00
diff --git a/README.md b/README.md
@@ -1,6 +1,7 @@
 py-arango
 =============
 [![Build Status](https://travis-ci.org/Joowani/py-arango.svg?branch=master)](https://travis-ci.org/Joowani/py-arango)
+[![Documentation Status](https://readthedocs.org/projects/py-arango/badge/?version=latest)](https://readthedocs.org/projects/py-arango/?badge=latest)
 
 Driver for ArangoDB REST API
 
