Ugly doors are doors that we don't want to see from the front:
- south-facing side of a BK door
- other side of one of those keyed staircases that don't actually have a matching key on the other side
This rejects layouts where one would appear.
Better blocked door handling:
- Start dungeon layout at the entrance
- Hold off on linking from blocked doors until the end of the dungeon, so they either point deeper in, or get added as a loop.
- Now that we care what the start is, properly handle the fact that dungeons have multiple starts.
Adds ability to make a location for required keys (enemy drops and pots), so the filler knows about them.
Uses the most pessimistic possible rule to make sure you can't keylock yourself in Escape.
Shuffler doesn't respect blocked doors yet so it may create an unbeatable layout, and the item placer will panic. But that's better than silently giving the player something impossible
tolmar