Merge pull request #391 from ey6es/master

Disable the righting for now, as well as the flat "floor" (to prevent sliding).
return Avatar Head by reference so setters actually do something
space out if
remove a debug line from setHeadFromGyros
Merge pull request #392 from birarda/oculus

fix broken head rotation set based on copy return
Merge branch 'master' of https://github.com/worklist/hifi