add build sticker

Author: iurimatias

README.md

@@ -3,6 +3,8 @@ What is embark
 ======
 
 [![Join the chat at https://gitter.im/iurimatias/embark-framework](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/iurimatias/embark-framework?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Build
+Status](https://travis-ci.org/iurimatias/embark-framework.svg?branch=develop)](https://travis-ci.org/iurimatias/embark-framework)
 
 Embark is a framework that allows you to easily develop and deploy  DApps.