Allow prepare_collada.py to work directly from zip files. Still requires an output directory.
Allow prepare_collada.py to work directly from zip files. Still requires an output directory.

sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata