Merge pull request #280 from birarda/master

find incorrect reference to OVR library
Merge pull request #281 from birarda/master

typo in name for oculus unix library
Merge pull request #282 from birarda/master

remove the oculus lib source files, not required
optimized performance of VoxelNode::isLeaf()
Merge branch 'master' of https://github.com/worklist/hifi into render_voxels_optimization
CR feedback
Merge pull request #283 from ZappoMan/render_voxels_optimization

Optimized VoxelNode::isLeaf()
Merge pull request #284 from birarda/master

attempted fix for UNIX link order of LibOVR library
Merge pull request #285 from birarda/master

another attempt to fix link issues
Merge pull request #286 from birarda/master

revert the last change
assume that oculus will only be from APPLE machines