Fixed some entrances that require reset otherwise
Fixed TR lobbies that need to be bombed
Fixed animated tiles in lobbies
Fixed wallmaster+lamp problem
Fixed some key rules that caused item requirements to be ignored
Fixed Old Man cave to be properly one-way in the graph
Fixed some odd key logic issues
Fixed graphics between HC/Sewers and cross dungeons.
Added base work for spiral staircases in HC/Eastern. (More data needed for other dungeons.)
Added new region to deal with push blocks in Sewers Secret Room
Refactored asm to be in multiple files.
