Properly load the bind shape matrix
Fix a major mixup with row/column major matrices
Remove debugging output
Parse (but ignore) camara and light libraries

Reduces warnings
Do not output warnings about nodes that do not produce any geometry
Parse (but do not process) geometry extra elements
Ignore light and camera instances
Do not output warnings about unknown extra data
Disable warning about unused animations
Disable warning about non-animated bones
Display all meshes from a collada file (not only the first found)