redesigned skeletal model animation bone pose format - instead of

redesigned skeletal model animation bone pose format - instead of
float[12] matrix data it is now short[6] origin+quat data with
appropriate scale factors detected at load to preserve full range of
motion, this does however lose the ability to scale bones in a model...
this reduces memory usage significantly in some games

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@9815 d7cf8633-e32d-0410-b094-e92efae38249