fix huge-mega-voxels and voxel file corruption
more guards to corrupt voxel files
dead code cleanup and comment cleanup
better handling of old model files
removed some debug code
Merge branch 'master' of https://github.com/highfidelity/hifi into fixingOctreeSave
converting voxel files to new versioned format with buffer breaks
more work on fixing voxels
correctly implement data types who assume all child data must be included (e.g. voxels)
remove noise
clean up warning
allow FBXReader to parse new format SVO files
CR feedback
Merge pull request #3356 from ZappoMan/fixingOctreeSave

voxel file corruption fixes