Started implementing ScriptFragment

Refactoring of fragment and adapter
introduced some actions-items and methods
Merge branch 'master' into ScriptFragment

Conflicts:
	catroid/src/org/catrobat/catroid/ui/adapter/BrickAdapter.java
added checkboxes to bricks
fixed errors in xml files
refactored xmls to be clickable on prototype

+ id's for checkboxes
implemented brick interface visibility method
getView methods refactored
further expanded brick interface
implemented listeners and deletion for all bricks
fix for scripts when clicked in combobox (null pointer)
minor changes
delete fix
implemented smart brick selection
disabling of not selectable bricks implemented
small fixes
repaired some xml's
fixed wait brick style
fixed deletion of scriptBricks
added brick animation
fix for deletion