Enhance DragAndDrop ListView scroll performance

This change is not needed for API v14 or above (not tested on Honeycomb).
Verified by logcat GC output.

See http://stackoverflow.com/a/10673046 for more details.
Refactored StageActivity/-Dialog/-Listener
Refactor ScriptActivity/-Fragment
Move Fragment tests to new package
Refactor some Util classes, added BottomBar class
Add source to gdx libraries, delete unused values
move LookFragmentTest to testpackage ui.fragment
update to latest robotium

* update to latest robotium snapshot
* update to latest robotium javadoc
* add robotium sources.jar
refactoring of librarymanagement in uitest package

* cleanup of classpath
* create .properties files for robotium
Merge pull request #170 from Catrobat/FasterListViewScrollingForAndroid2.x

Enhance DragAndDrop ListView scroll performance
Merge pull request #169 from Catrobat/RefactorSomeCode

Refactor some code (details inside)
Merge branch 'master' into LibgdxActions
added new version of the libgdx source jars