-Added Main und Pause Menu
-Known Issues:
-->Pause Menu issue with Deactivate
-->Main Menu issue with Continue Screen
-->Multidevice issue
-Added all remaining Boss-Animations
-Added a new version of Starling and changed some classes for fixing some bugs and adding features
-Menus now works correctly
-Animated Model now works correctly
-Revamped the Collision Process for reduced amount of Checks
-Added updated Boss Movement
-Recycling of EntityManager and GraphicsManager is now working correctly
-Multidevice Support now works correctly
-Added Sound Mute/Unmute Effect
-Added a second experiemental spawning methode
-->To activate this methode set DebugMode to True