updated bage

README.md

@@ -1,6 +1,6 @@
 [![Build Status](https://travis-ci.org/MartinThoma/asr.svg?branch=master)](https://travis-ci.org/MartinThoma/asr)
 [![Coverage Status](https://img.shields.io/coveralls/MartinThoma/asr.svg)](https://coveralls.io/r/MartinThoma/asr?branch=master)
-[![Documentation Status](https://readthedocs.org/projects/asr/badge/?version=latest)](https://pythonhosted.org/asr)
+[![Documentation Status](http://img.shields.io/badge/docs-latest-brightgreen.svg)](https://pythonhosted.org/asr)
 
 asr
 ===