DevKit updates (#239)

Author: ElectricMaxxx

README.md

@@ -10,7 +10,6 @@
 
 Branch | Travis | Coveralls |
 ------ | ------ | --------- |
-master   | [![Build Status][travis_stable_badge]][travis_stable_link]     | [![Coverage Status][coveralls_stable_badge]][coveralls_stable_link]     |
 master | [![Build Status][travis_unstable_badge]][travis_unstable_link] | [![Coverage Status][coveralls_unstable_badge]][coveralls_unstable_link] |
 
 This bundle is part of the [Symfony Content Management Framework (CMF)](http://cmf.symfony.com/) and licensed