Made overlays thread safe for write operations, which solved a script
crash.
Merge branch 'master' of https://github.com/highfidelity/hifi
Added some missing locks to make Overlays thread safe for reading as well.
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
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.
Don't create a glower if no glow
balances are 64-bit unsigned ints
CR
Merge pull request #2912 from Atlante45/point_and_glow

Point and glow
handle serving of scripts at temp unique UUIDs
fix double return false
Merge pull request #2914 from birarda/credits

balances are 64-bit unsigned ints, fix script request
fix a comment in script handling