Overlay Support

[Devostated]

The map porting works pretty good so far, but one thing I would really like to see are overlays/decals. A solution to get them into a simple OBJ would be to create a plane with the texture on it, similar to how it's done with this blender addon https://github.com/lasa01/io_import_vmf/blob/master/io_import_vmf/import_vmf.py