SL-375, SL-378 - rudimentary logging info to list joint offsets during mesh import. dae_tool.py work to enable joint offset tweaking.

SL-344 - fixed a problem in avatar_lad with some params in wrong group, added diagnostics to make this easier to detect.

SL-338 - added --set_version to anim_tool.py, for creating files to test upload of unsupported file versions.