Work on the new terrain generation system. Basic code flow is there, but
it's both slow during worldgen and buggy at the moment.

-Peter Mawhorter
Got proper height out of terrain generation, but strata aren't working.

-Peter Mawhorter
Increased loading ranges a bit with the faster terrain generation. Still
needs a lot more work (for example it's too steep right now).

-Peter Mawhorter