Merge pull request #85 from basz/master

update coveralls badge

README.md

@@ -2,7 +2,7 @@
 
 [![Build Status](https://travis-ci.org/zf-fr/zfr-oauth2-server.png)](https://travis-ci.org/zf-fr/zfr-oauth2-server)
 [![Latest Stable Version](https://poser.pugx.org/zfr/zfr-oauth2-server/v/stable.png)](https://packagist.org/packages/zfr/zfr-oauth2-server)
-[![Coverage Status](https://coveralls.io/repos/zf-fr/zfr-oauth2-server/badge.png)](https://coveralls.io/r/zf-fr/zfr-oauth2-server)
+[![Coverage Status](https://coveralls.io/repos/github/zf-fr/zfr-oauth2-server/badge.svg?branch=master)](https://coveralls.io/github/zf-fr/zfr-oauth2-server?branch=master)
 [![Total Downloads](https://poser.pugx.org/zfr/zfr-oauth2-server/downloads.png)](https://packagist.org/packages/zfr/zfr-oauth2-server)
 [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/prolic/zfr-oauth2-server)