Updated translations.
Working on ability to set a region of the metavoxel data directly.
More set/blend bits.
Working on voxelizing spanners using a set of six rendered images.
More work on voxelizing.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels

Conflicts:
	interface/interface_en.ts
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Some alphabetical cleaning
Added undo/redo support to the client
Basic voxelization.
Blend when setting.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Fix for voxelizing models.
Working on model rendering modes.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Working on render modes.
Merge branch 'master' of https://github.com/highfidelity/hifi into undo_redo_system
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Extent tweaks.
Removed debugging code.