Fixed clock -> process_time for Python 3.8
Fixed interior blocked doors
Vanilla logical connections for Ice Cross (Push block)
Dungeon entrance enhancement for TR, Skull, HC (Standard)
Kill on invalid dungeons during key door shuffle
Key logic improvements (Smallkey restrictions, Logic Min/Logic Max for key doors, Big Chest doesn't count for small keys if BK not found yet)
Key door candidate now accounts for "overworld" dungeon traversal
Path checking added some Crystal Logic (Blind's Cell to Boss mostly)
Kill on dungeon gen if taking too long
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.
