Removed the Render system because it is no longer needed.
Removed tileRow and tileNumber properties from the Tile object.
Removed the objects array on the Map object as it is no longer being used.
Update the sprite's position when the position in the Position component changes.
Entities now have a sprite property which holds the PIXI Sprite object.
Removed the sprite component as it is no longer needed.
No longer add the Sprite component and temporarily disable the Tooltip component.
The Group object now inherits from his PIXI class.
Change the door texture when the orientation changes.