Finished Simplified Mesh

Auto-triangulates, does not create cracks, can be finely configured. It
takes a bit to triangulate, but once done, it's very fast to render,
even with inefficient render calls. However, there's a bug that
sometimes skips triangulation of a quarter, but I couldn't find the
source. It only occurs under very specific setting, though. Possibly
improvements include the 'importance' determination algorithm and the
conversion of some areas of code into triangle strip and fan generation.