Switched Oculus UI to hemisphere. Added curved semicircle UI
Merge branch 'master' of https://github.com/highfidelity/hifi into OculusOverlay
Fixed coding standard and build error
Merge branch 'master' of https://github.com/highfidelity/hifi into OculusOverlay

Conflicts:
	interface/src/ui/ApplicationOverlay.cpp
Merge pull request #2986 from Barnold1953/OculusOverlay

Hemisphere Oculus Overlay