Material bindings don't work, since they're now on the objects
themselves rather than the instances, and I haven't updated
Psychopath itself for that yet.
All scene data collection is now done in a single sweep of frame
changing. Previous commits were already working towards this, and
but now it's done. Yay!
Over-all, switching to this approach gives huge speed boosts on
large scenes with animation, rigs, dependencies, etc. For such
scenes, frame changing is very expensive.
This eliminates writing temp files to disk for any part of the
Blender/Psychopath integration.
The option to export to a file still exists, however, by
specifying an export output path.
