Separated part of the dungeon-exporting logic into a new class: Schematic. Also created a few classes to implement important operations. Some parts of the original exporting logic are missing now, such as mapping certain blocks to standard IDs. That will be reimplemented in the future. Importing schematics is not supported yet. I need to test what's done so far.
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