replacing coveralls with codecov

coveralls doesn't seem to work no more

Author: mebjas

readme.md

@@ -1,6 +1,6 @@
 CSRF Protector
 ==========================
-[![Todo Status](http://todofy.org/b/mebjas/CSRF-Protector-PHP)](http://todofy.org/r/mebjas/CSRF-Protector-PHP) [![Build Status](https://travis-ci.org/mebjas/CSRF-Protector-PHP.svg?branch=master)](https://travis-ci.org/mebjas/CSRF-Protector-PHP) [![Coverage Status](https://coveralls.io/repos/mebjas/CSRF-Protector-PHP/badge.svg?branch=master)](https://coveralls.io/r/mebjas/CSRF-Protector-PHP?branch=master) 
+[![Todo Status](http://todofy.org/b/mebjas/CSRF-Protector-PHP)](http://todofy.org/r/mebjas/CSRF-Protector-PHP) [![Build Status](https://travis-ci.org/mebjas/CSRF-Protector-PHP.svg?branch=master)](https://travis-ci.org/mebjas/CSRF-Protector-PHP)  [![codecov](https://codecov.io/gh/mebjas/CSRF-Protector-PHP/branch/master/graph/badge.svg)](https://codecov.io/gh/mebjas/CSRF-Protector-PHP)
 <br>CSRF protector php, a standalone php library for csrf mitigation in web applications. Easy to integrate in any php web app. 
 
 Add to your project using packagist