Added 79 new stickers. 60 by LforLouise, 1 by Noble Row, 2 by Ben10083,
10 by Hazelmouse, 1 by Mr.Popper, 4 by FabianK3, and 1 by Kermit.
Added sticker sheets, a storage that can only store stickers. Sprite by
Noble Row
Added the new sticker sheets to the loadout menu
Replaced gold star and googly eye boxes with sticker sheets.
Refactored hitby to be in line with TG's version.
Refactored item weight defines to a more clear naming scheme, also in
line with TG's version.
Refactored how the movement bumps are handled, ported signals to handle
them, in preparation for the movement update.
Fixed disposal hit bouncing the hitting atom on the wall.
Items do not push other items anymore if they are tiny.
Acetrea