!A - Adds SpaceShip
!F - Adds getID to Entity
!B - Fixes rotation unit confusion in AnimatedSprite
!B - Fixes cache in AnimationSprite
!A - Adds EntityObserver interface
!F - Adds getSystem to EntityWorld
!A - Adds astronauts and abducting mechanic (barebones)
!B - Fixes Gleed rectanle parsing
!A - Adds DisposingSystem
!B - Fixes engine not disposing properly
!A - Adds entity managers (tags and groups)
!A - Adds CollisionHandlingSystem
!A - Adds GameGlobals