Use custom badge for license

Author: ValentinH

README.md

@@ -4,7 +4,7 @@ Status:
 [![npm version](https://img.shields.io/npm/v/angularjs-slider.svg?style=flat-square)](https://www.npmjs.com/package/angularjs-slider)
 [![npm downloads](https://img.shields.io/npm/dm/angularjs-slider.svg?style=flat-square)](http://npm-stat.com/charts.html?package=angularjs-slider&from=2015-01-01)
 [![Build Status](https://img.shields.io/travis/angular-slider/angularjs-slider.svg?style=flat-square)](https://travis-ci.org/angular-slider/angularjs-slider)
-![License](https://img.shields.io/github/license/mashape/apistatus.svg?style=flat-square)
+![License](https://img.shields.io/badge/License-MIT-blue.svg?style=flat-square)
 
 Links:
 [![Join the chat at https://gitter.im/rzajac/angularjs-slider](https://img.shields.io/badge/GITTER-join%20chat-1dce73.svg?style=flat-square)](https://gitter.im/rzajac/angularjs-slider?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)