Separated exportDungeon() from registerCustomDungeon() - exporting a dungeon no longer automatically registers it. Also changed exportDungeon() so that it returns a boolean indicating success or failure, instead of an instance of DungeonGenerator that was never being used. I modified CommandEndDungeonCreation so that it can warn you if exporting the dungeon failed (if exportDungeon() returned false), and also, to register the dungeon after it's exported since it's no longer automatic.
DimDoors
Dimensional Doors for Minecraft Adds several items that allow the player to move between and create dimensions
see the MC forum topic for details