Revert "Remove travis budge"

This reverts commit 9bc4d0869dbaba53109ddc7b62636db7a54abf98.
diff --git a/README.md b/README.md
index a77e52f..373da49 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@
 * Author: rinrinne a.k.a. rin_ne
 * Repository: http://github.com/rinrinne/gerrit-rabbitmq-plugin
 
+[![Build Status](https://travis-ci.org/rinrinne/gerrit-rabbitmq-plugin.png?branch=master)](https://travis-ci.org/rinrinne/gerrit-rabbitmq-plugin)
+
 Synopsis
 ----------------------