first draft of factorizing the rendering traversal for both sides in stereo
Merge branch 'master' of https://github.com/highfidelity/hifi into temp0
introduce the concept of side thorugh out the rendering traversal
clean version of the simple stereo ack, not available for Occulus yet
remove useless comments
Merge branch 'master' of https://github.com/highfidelity/hifi into temp0
fix syntax
Merge pull request #3799 from samcake/temp0

improvement on stereo rendering (but not Occulus....)