modifying README with badges

README.md

@@ -1,3 +1,8 @@
+[![Latest Stable Version](https://poser.pugx.org/mouf/database.datasource.datasource-interface/v/stable)](https://packagist.org/packages/mouf/database.datasource.datasource-interface) [![Total Downloads](https://poser.pugx.org/mouf/database.datasource.datasource-interface/downloads)](https://packagist.org/packages/mouf/database.datasource.datasource-interface) [![Latest Unstable Version](https://poser.pugx.org/mouf/database.datasource.datasource-interface/v/unstable)](https://packagist.org/packages/mouf/database.datasource.datasource-interface) [![License](https://poser.pugx.org/mouf/database.datasource.datasource-interface/license)](https://packagist.org/packages/mouf/database.datasource.datasource-interface)
+[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/thecodingmachine/database.datasource.datasource-interface/badges/quality-score.png?b=4.0)](https://scrutinizer-ci.com/g/thecodingmachine/database.datasource.datasource-interface/?branch=4.0)
+[![Build Status](https://travis-ci.org/thecodingmachine/database.datasource.datasource-interface.svg?branch=4.0)](https://travis-ci.org/thecodingmachine/database.datasource.datasource-interface)
+[![Coverage Status](https://coveralls.io/repos/thecodingmachine/database.datasource.datasource-interface/badge.svg?branch=4.0&service=github)](https://coveralls.io/github/thecodingmachine/database.datasource.datasource-interface?branch=4.0)
+
 Datasources for Mouf
 ====================
 
@@ -29,4 +34,4 @@ This package comes with 2 pickers (implementing the `PickerInterface`):
 - `RowPicker`: selects one value in a row
 - `CallbackPicker`: applies a callback function to a row and returns the value of the callback
 
-Finally, the `RowBuilder` class can be used to merge rows and to add datasources as keys of a row.
+Finally, the `RowBuilder` class can be used to merge rows, add a row as a key of a row or to add datasources as keys of a row.