add a crash guard around negative silent samples
Merge pull request #3003 from birarda/master

add a crash guard for negative silent samples
replaced takeFirst() with dequeue() for consistency
Fix IK for hydra hands.
first cut at support for extra element data
recover some code for one less magic vec3
Merge pull request #3005 from AndrewMeadows/bug-fix

Fix IK for hydra hands.
Added dev menu option to disable nack packets
nackdisable to disablenack
var name change again
Merge pull request #3007 from wangyix/master

Added Developer menu option to disable nack packets.
try appendElementData() a different way
Merge branch 'master' of https://github.com/worklist/hifi into octreeWireformatImprovements