Update README.md

Author: RadoBuransky

README.md

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 #Scoverage Plugin for Sonar#
 
 [![Build Status](https://travis-ci.org/RadoBuransky/sonar-scoverage-plugin.png)](https://travis-ci.org/RadoBuransky/sonar-scoverage-plugin)
+[![License](http://img.shields.io/:license-Apache%202-red.svg)](http://www.apache.org/licenses/LICENSE-2.0.txt)
 [![Analytics](https://ga-beacon.appspot.com/UA-55603212-2/sonar-scoverage-plugin)](https://github.com/igrigorik/ga-beacon)
 
 Plugin for [SonarQube] that imports statement coverage generated by [Scoverage] for Scala projects.