. updated docs for new goal (collectibles)

! Add COLLECTIBLES which OPEN ROOMS.

~ level_editor tools split into tools directory

! load entities in ROOMS.
! entities are loaded from txt with name,pos

orb
! orbs bop up and down
! orbs explode on impact with Nut

HUD
! counter which shows the amount of orbs to grab in a room

orb_tile
! removes the tile it is on top of.
! in a puff of smoke

! create an Entity TOOL.
+ orb graphic follows cursor