Adds coverage status badge to README

Readme.md

@@ -1,8 +1,9 @@
 ## Object Relational Mapping
 
+[![Version](https://badge.fury.io/js/orm.svg)](https://npmjs.org/package/orm)
 [![Build Status](https://api.travis-ci.org/dresende/node-orm2.svg?branch=master)](http://travis-ci.org/dresende/node-orm2)
-[![](https://badge.fury.io/js/orm.svg)](https://npmjs.org/package/orm)
-[![](https://gemnasium.com/dresende/node-orm2.png)](https://gemnasium.com/dresende/node-orm2)
+[![Coverage Status](https://img.shields.io/coveralls/dresende/node-orm2.svg)](https://coveralls.io/r/dresende/node-orm2?branch=master)
+[![Dependencies](https://gemnasium.com/dresende/node-orm2.png)](https://gemnasium.com/dresende/node-orm2)
 [![Flattr this git repo](http://api.flattr.com/button/flattr-badge-large.png)](https://flattr.com/submit/auto?user_id=dresende&url=https://github.com/dresende/node-orm2&title=ORM&language=&tags=github&category=software)
 
 ## Install