blendertools: implemented relative path export
blendertools: re-implemented inertials properly
blendertools: corrected collision object names
blendertools: fixed handling of poses
blendertools: comments and debug output
blendertools: round small numbers to 0 before export
blendertools: fixed import for debug output, some formatting
blendertools: threw out old code for model-independent material handling
blendertools: added rounding to export and fixed world properties
blendertools: changed filename export
blendertools: comment clean-up