spritedialog & projectsactivity tests refactored

combined similar tests to accelerate testing
Moved redundant test from ProjectActivityTest to NewSpriteDialogTest
comment corrected
remove XML parser and add xstream-1.4.4
test cases in catroidTest not changed yet
Merge remote-tracking branch 'origin/master' into xstream_testing

Conflicts:
	catroid/src/org/catrobat/catroid/xml/parser/BrickParser.java
	catroid/src/org/catrobat/catroid/xml/parser/CatroidXMLConstants.java
	catroid/src/org/catrobat/catroid/xml/parser/FullParser.java
	catroid/src/org/catrobat/catroid/xml/serializer/BrickSerializer.java
	catroid/src/org/catrobat/catroid/xml/serializer/Serializer.java
	catroid/src/org/catrobat/catroid/xml/serializer/SoundSerializer.java
	catroid/src/org/catrobat/catroid/xml/serializer/SpriteSerializer.java
remove XML parser tests
remove unused aliases
change & remove XML related testcases
removed ErrorListenerInterface
changed ProjectManager, Utils: showErrorDialog method added
more refactoring
remaining dialogs refactored
removed Utils.displayErrorMessageFragment
refactored Fragments
MainMenuActivity refactored
refactored Activities
CatroidTest refactored
refactored UItests
Merge branch 'master' of ssh://git@github.com/Catrobat/Catroid.git into xstream_testing
Merge pull request #172 from Catrobat/refactorErrorListener

Refactor error listener