Starting on PrioVR integration.
Updates to PrioVR interface.
Untabbed.
Better instructions.
More work on PrioVR integration.
Merge branch 'master' of https://github.com/highfidelity/hifi into priority
More work on PrioVR integration.
Looks like "reflection" can be used as a synonym for "specular."
Merge branch 'master' of https://github.com/highfidelity/hifi into priority
Merge branch 'master' of https://github.com/highfidelity/hifi into priority

Conflicts:
	interface/src/avatar/SkeletonModel.cpp
Merge branch 'master' of https://github.com/highfidelity/hifi into priority
Merge branch 'master' of https://github.com/highfidelity/hifi into priority
PrioVR tweaks.
Add PrioVR to .gitignore.
Tabs -> spaces.
Merge branch 'master' of https://github.com/highfidelity/hifi into priority
Merge branch 'priority' of https://github.com/ey6es/hifi into priority
Merge pull request #2855 from ey6es/priority

Basic PrioVR integration (Windows only).