redesigned stage menu

there's an issue with the menu/background image which dosen't fill the
entire width
redesign of stage menu completed
reverted project file
Merge branch 'master' into stagemenu

Conflicts:
	catroid/.project
	catroid/res/layout/dialog_stage.xml
	catroid/res/values/colors.xml
	catroid/src/org/catrobat/catroid/ui/dialogs/StageDialog.java
Merge pull request #312 from Catrobat/stagemenu

Stagemenu