Adding badges

Author: moufmouf

README.md

@@ -1,3 +1,10 @@
+[![Latest Stable Version](https://poser.pugx.org/thecodingmachine/safe/v/stable.svg)](https://packagist.org/packages/thecodingmachine/safe)
+[![Total Downloads](https://poser.pugx.org/thecodingmachine/safe/downloads.svg)](https://packagist.org/packages/thecodingmachine/safe)
+[![Latest Unstable Version](https://poser.pugx.org/thecodingmachine/safe/v/unstable.svg)](https://packagist.org/packages/thecodingmachine/safe)
+[![License](https://poser.pugx.org/thecodingmachine/safe/license.svg)](https://packagist.org/packages/thecodingmachine/safe)
+[![Build Status](https://travis-ci.org/thecodingmachine/safe.svg?branch=master)](https://travis-ci.org/thecodingmachine/safe)
+[![Coverage Status](https://coveralls.io/repos/thecodingmachine/safe/badge.svg?branch=master&service=github)](https://coveralls.io/github/thecodingmachine/safe?branch=master)
+
 Safe PHP
 ========