Substantial betterification of Hermite data averaging.
Adjustment of threshold multiplier for metavoxels.
Increment packet version to avoid crashes.
Merge pull request #3569 from ey6es/metavoxels

Improved dual contour averaging.
Merge branch 'master' of https://github.com/highfidelity/hifi into attenuation_zones
Remove TREE_SCALE factor _ update attenuation