Add project badges

README.md

@@ -1,4 +1,10 @@
 ### Nebula Core
+
+[![Build Status](https://travis-ci.org/nebula-plugins/nebula-core.svg?branch=master)](https://travis-ci.org/nebula-plugins/nebula-core)
+[![Coverage Status](https://coveralls.io/repos/nebula-plugins/nebula-core/badge.svg?branch=masterservice=github)](https://coveralls.io/github/nebula-plugins/nebula-core?branch=master)
+[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/nebula-plugins/nebula-core?utm_source=badgeutm_medium=badgeutm_campaign=pr-badge)
+[![Apache 2.0](https://img.shields.io/github/license/nebula-plugins/nebula-core.svg)](http://www.apache.org/licenses/LICENSE-2.0)
+
 This specific project holds some "helper" classes for testing and interacting with Gradle. It's not meant to get too big, 
 but should serve as a central place for all plugins. This project should have no dependency and not contain any specific
 plugins.