Working on skeleton loading, added support for FBX text format (exported by
Blender).
More progress on reading skeletons.
Merge branch 'master' of https://github.com/worklist/hifi into ossome
More work on importing the version of FBX exported by Blender.
Merge branch 'master' of https://github.com/worklist/hifi into ossome

Conflicts:
	interface/src/renderer/FBXReader.cpp
Fixed merge error.
Factoring the FBX model code out to a shared base class.
Forgot these guys.
Adapt to the *other* kind of cluster.
Just check the last entry for the type.
More fixes for text FBXs.
Fix for weird links in Blender exports.
The Blender FBX has models that are also meshes.
Allow more bones.  The model I'm testing with has about 60.
Fixes to load my test model.
More work on custom skeletons.
Use the head position from the loaded skeleton, if available.
Apply the neck position.
More work on extracting rotations.
More rotation tweaks.