Update to ActionBarSherlock 4.4.0

Testrun: https://jenkins.catrob.at/job/Catroid-Multi-Job-Custom-Branch/663/

Lint got 2 new Warnings. I don`t see them in Eclipse. Does Jenkins use a different lint.xml?
Also I did not make a full testrun on an Android 2.x device.

An important design change (discussed with the design team in issue #79): when pressing the menu button the standard Android 2.x menu appears and not an overflow menu.