Submitted by David Roy
Multiple nodes can reference the same geometry, and specify the same materials. This lead
to the import code overwriting material mappings of faces in a destructive way. Instead of
just writing the material bindings always we now keep book of what geometry+material mapping
we've already handled.
fix included in report from Martijn Berger (mberger)
made some small changes.
- use ints rather then unsigned long for printing, values are not likely to be very large.
- CMake remove strict flags from collada build dir since I had warnings in the collada headers.
- added xml2 to collada libraries else I couldnt get collada building.
Import unit_settings to scene.
Note: I use here RNA to do this, and I think I might slowly work on replacing low-level DNA usage with RNA where possible.
