[geo] Add rooms.
[hacc] Fix problem parsing -inf etc.
[util] separate math module from Vec.h
[vis] graffiti modules draws colored lines
[phys] use graffiti to debug-draw fixtures
[geo] tiles!  Almost functional!
[rata] Try out a tilemap.
[geo] Actually update Resident::room when rerooming
[rata] wind solid tile CCW
[phys] debug-draw ghost vertices
[geo] Imporve tilemap optimization
[geo] remove tilemap optimizer debug prints