Provide options for model translation: by default, pivot about mesh bounds'
center; allow numeric translation or pivot about joint position.
Merge branch 'master' of https://github.com/highfidelity/hifi
Fix for certain models with textures not parented to materials.
Merge branch 'master' of https://github.com/highfidelity/hifi
Merge pull request #2810 from ey6es/master

Allow adjusting attachment pivots on upload, fixed bug with certain model textures.