Updated to improve the borders on the colorable assets: some of them had areas that the program didn't pick up as colorable when they should have been, especially after the (apparent) recent update to what color ranges Dungeondraft picked up as colorable. A few of the objects now have black borders between the colorable and brown portions of the asset; this was unavoidable, and I think looks better than red borders, which is what happens when the colorable portion touches the brown portion.
Also added a plain and plain (colorable) macuahuitl!
