Update README.md

Now links and status of Jenkins jobs are presented on the frontpage of the Arduino git in github.

Author: fallberg

README.md

@@ -4,3 +4,7 @@ Arduino
 MySensors Arduino Library v1.5
 
 Please visit www.mysensors.org for more information
+
+Current build status of master branch: [![Build Status](http://ci.mysensors.org/job/MySensorsArduino/branch/master/badge/icon)](http://ci.mysensors.org/job/MySensorsArduino/branch/master/)
+
+Current build status of development branch: [![Build Status](http://ci.mysensors.org/job/MySensorsArduino/branch/development/badge/icon)](http://ci.mysensors.org/job/MySensorsArduino/branch/development/)