Map 3d conversion WIP

What seems to work:
- Loading all map layers at once on game start
- Shifting all map layers at once when moving around

What doesn't work:
- There seems to be a strange offset of things on the lower z-levels. It's actually pretty hilarious, you can only drop down into the basement, and have to move back to the stairs which will spawn you into the wall of the evac shelter.
- Saving doesn't work, still need to track this bugger down. =(
You are amazing. I still don't know what you're saying, but it sounds like exactly the bug I've been hunting down for 3 hours today. I'll look into it tommorrow once I've had some rest.