From Mike Connell, "3 smaller fixes for the 3DS loader (against trunk)

1. Respect "noMatrixTransforms" option for matrices attached to meshes, not only those attached to nodes

2. traverse_nodes variable did the exact opposite of it's description.

3. Always try to load referenced textures, even if we can't find the files (in order to the the registry's ReadFileCallback have a stab at it)
"