Decouple Rift head tracking from avatar's head position

This makes the Rift's view reflect the user's physical movements exactly
while the avatar follows the movements as best it can.
added address bar dialog
Merge branch 'master' of https://github.com/highfidelity/hifi into 20061
Fix upright head model position calculation for avatar scale changes
Add finish lookup event
layout fix
use backslash to activate chat
Merge branch 'master' of https://github.com/highfidelity/hifi into 20061

Conflicts:
	interface/src/Menu.h
update to newer bootstrap, add stub of setup form
added go button active state icon
add base of modal to choose from user domains
add username and password to domain setup page
simplify the domain setup page to just handle domain ID
Merge branch 'master' of https://github.com/worklist/hifi
Merge branch 'master' of https://github.com/highfidelity/hifi into 20061
Add world space eye locations (for making eye contact) to the oculus manager
Merge branch 'master' of https://github.com/worklist/hifi
Merge branch 'master' of https://github.com/highfidelity/hifi into domain-wizard
add a nav panel for setup and pin to left
handle permanent sidebar in setup page