I changed the name filter for schematic names from
CommandEndDungeonCreation to DungeonHelper, and renamed it to
NamePattern. I also rewrote most of registerCustomDungeon() to be much
more concise. The changes are incomplete but I'm making an intermediate
commit. The aim is to change DungeonHelper into a proper singleton and
to eliminate the clunky sections that manually map dungeon categories to
their corresponding lists. Instead, I'll use data structures to
implement that far more efficiently.
1e2dedaafe