Merge pull request #2909 from PhilipRosedale/master

add visual indicator of thrust direction
Merge remote-tracking branch 'upstream/master'
moved _sequenceNumber back to OctreeQueryNode

instead added incrementSequenceNumber() to OctreeQueryNode for
sendthread to use
Added some missing locks to make Overlays thread safe for reading as well.
renaming of AABox to AACube, introduction of actual AABox
renaming of AABox to AACube, introduction of actual AABox
renaming of AABox to AACube, introduction of actual AABox
Use local viewer model for specular.
Added local glow to models
Glow when grabbed with the mouse (for now)
Added a new lock specific to deleting, and improved safety
Merge branch 'master' of https://github.com/worklist/hifi into aacube
removed old code that was commented out

changed tabs to spaces
_voxelFades needs locking.
spaces instead of tabs.
Mode sure the closest model is always selected
Merge pull request #2910 from wangyix/master

fix for skipped sequenceNumber bug in OctreeQueryNode
Merge branch 'master' of https://github.com/highfidelity/hifi into point_and_glow
Merge pull request #2906 from Barnold1953/master

Write thread safety for Overlays QMaps
Merge pull request #2911 from ey6es/master

Use local viewer model for specular.