Way to specify which models myron should load

[TropheusJ]

Currently, Create crashes with myron because it tries to load it's obj files which are in the forge format. A way to specify which models myron should/shouldn't load would be useful. possible options:

• a field in obj/mtl files saying myron should not try to load them
• a way to exclude a directory from myron
• make myron loading opt-in, invert either of the former 2 options