Add coveralls badge

README.md

@@ -2,6 +2,7 @@ blogit
 ======
 
 [![Build Status](https://travis-ci.org/oz123/blogit.svg?branch=master)](https://travis-ci.org/oz123/blogit)
+[![Coverage Status](https://coveralls.io/repos/github/oz123/blogit/badge.svg?branch=master)](https://coveralls.io/github/oz123/blogit?branch=master)
 [![Documentation Status](https://readthedocs.org/projects/blogit/badge/?version=latest)](http://blogit.readthedocs.org/en/latest/?badge=latest)
 
 A **quick** and simple static site generator based on markdown and jinja2.