-Added new PilotEntity property to CockpitEntity

-Added new ControlShip property to CockpitEntity (still WIP)
-Added new Position property to CubeBlockEntity (replaces Min)
-Added new Size property to CubeBlockEntity
-Overhauled game registries to map to calling assembly GUID upon registration
-Added new sub-node to cockpits in GUI for displaying the PilotEntity