Mineways 10.10: Mesh simplification, wall connection fixes, cleanups

[Eric Haines]

Mineways 10.10 is out. New feature: mesh simplification. Also fixes to how blocks connect with walls and a bunch of other minor cleanups. All changes listed here.

This image is an example showing the simplified meshes generated. Yes, they look long and thin, but it's a fairly optimal way to minimize the total number of rectangles in the scene. This export has less than half the triangles that the unsimplified scene has.