Load mapping and use it for offset, joint mappings, blendshape mappings.
Fixed incorrect capitalization.
Need to allow multiple blendshape mappings per shape index.
Merge branch 'master' of https://github.com/worklist/hifi
Merge pull request #1013 from ey6es/master

Use Faceshift mapping files (FST) when present for their transform offsets and joint/blendshape mapping.  Fixed crash on meshes with no texture coordinates.