map2mdl Mesh Decimate

[khanghugo]

All applicable faces should join to reduce wpoly count. This will help with sloppy / lazy mapping

[khanghugo]

This seems to be a lot of work considering I didn't think about it while making map2mdl. THe current problem is that I roll my own math library and it is hard to make a new data type that plays nicely with it without using more duct tape over what I have.