Update 0.22

I rewrote most of the world generation for this update. It's now based around the gameplay needs. One can add a bunch of elements needed for the gameplay to the world and the system will build the terrain around that.

I left the gameplay about the same for now, but I'll change that with the next updates, especially the ways you get new spells.

The old saved games won't work with this update, and the next ones will likely break them again.