Update based on first project viewer tests.

Two more bones to better address back deformation: UPPER_BACK and LOWER_BACK
Better deformation for breasts, belly, upper and lower back (seen using the Body Fat and Belly Size sliders)
Minor tweaks in the avatar_lad.xml file for a few other minor shapes.
Small typo bug (FITMESH-2)
Updated rigs and corrected female mesh
Removed skeleton-only files so that people all start from the same base meshes with example skinning
These updates specifically address the following bugs: FITMESH-2, FITMESH-4, FITMESH-5, FITMESH-7, FITMESH-10 (.ma formats, not .dae)