Kills local voxels if voxel server is removed from NodeList
- added notification hooks to NodeList
- implemented hooks in VoxelSystem to kill local voxels when
  voxel server is killed
- Smooth rescaling
- stop following when leading avatar disconnect
- set max far clip for no more crash with really big avatars
Merge remote-tracking branch 'upstream/master' into particles
Working on upgrading to latest version of Oculus software and adding Linux
support.
Merge branch 'master' of https://github.com/worklist/hifi
Switch to debug libs.
Revert "Switch to debug libs."

This reverts commit 1739371c17b010031930ce6d7d794b0e4f955ee6.
Revert "Working on upgrading to latest version of Oculus software and adding Linux"

This reverts commit 98a0c01b29d2b03fa5dff88ce2c27d7877b364af.
Merge branch 'master' of https://github.com/worklist/hifi
Merge branch 'master' of https://github.com/worklist/hifi
Merge branch 'master' of https://github.com/worklist/hifi into multiple_voxel_servers
fix compiler warning
small tweak
- changed according to review comments
- added reset scale option
Normalize when we render the ground.  This shouldn't be necessary, but it
looks like various parts of the code rely on RESCALE_NORMAL, which is set but
not unset in avatar/Head/Hand.  We'll have to look at that more closely later
on.
Merge branch 'master' of https://github.com/worklist/hifi
Merge pull request #784 from ey6es/master

Fix for ground rendering (on OS X): enable GL_NORMALIZE, which overrides RESCALE_NORMALS.
Merge pull request #782 from Atlante45/master

few fixes on rescaling and following
Disable hand receive logic to keep team from crashing while a bug is being tracked.
Root cause of crash isolated to setRaveGloveMode(), so some disabled code has been re-enabled