fix small build issue in voxel-edit
Merge pull request #846 from ZappoMan/master

fix small build issue in voxel-edit
implement threaded voxel processing
enabled Low Res sending while moving by default
make voxel fade shorter elapsed time and logarithmic instead of linear
Merge pull request #847 from ZappoMan/master

voxel sending/processing improvements
Merge branch 'master' of https://github.com/worklist/hifi into bugfixes
Merge pull request #848 from ZappoMan/bugfixes

make voxel fade shorter elapsed time and logarithmic instead of linear
Gonna access that vector from two threads?  Need to lock it.