added classes for network game state delivery
open doors can be damaged by area damage now.
items will be destroyed by area damage
made triggered grenades more expensive
implemented net state diff capability
boxes are not generated if the minimum size does not fit in the level part that should generate boxes
moved Tile to level package
more net code, tile is now able to read/write from/to net state parts
added particles and debris
fixed setting id in tile constructor to only get a new id when it is created normally