Add TravisCI build badge image

Marco Paolini · Marco Paolini · commit 69681e839cec · 2016-05-20T01:45:22.000+02:00
diff --git a/README.md b/README.md
@@ -2,6 +2,8 @@
 
 **AN EXPERIMENT**
 
+[![Build Status](https://travis-ci.org/elastic-coders/pushpull.svg?branch=master)](https://travis-ci.org/elastic-coders/pushpull)
+
 Websocket to message broker gateway for servers
 
 ```
