cleanup constructors
remove dead VoxelSceneStats class and clean up Voxel Stats to be OctreeStats
more constructor cleanup
remove double definition of GLEW_STATIC
clarify that Windows builds are 32-bit, fix double GLEW_STATIC
have FindGLEW only look for 32-bit static lib
only look for the 32-bit oculus lib on windows
remove space bar behavior from editrVoxels.js
updates to BUILD for addition of qxmpp
clarify when it is possible to drag-and-drop external dependency
Merge pull request #2258 from ZappoMan/bugfixes

remove space bar behavior from editrVoxels.js
resolve conflicts on merge with upstream master
updates to BUILD guide to suggest using tapped formulas
fix a typo for path to tapped qxmpp formula
Merge pull request #2245 from ZappoMan/cruft_cleanup

Cruft cleanup
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Merge pull request #2250 from birarda/windows-build

windows build cleanup after dependencies work, BUILD guide updates
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Added per-attribute LOD threshold multiplier; things like spanners need
different LOD thresholds than, say, voxels.