minor cleanup
added MyAvatar.setMotorVelocity() & friends for JS
Fix for eyes on skeleton (e.g., Mixamo) models.
Fix for vertical jitter when walking on floor
Fix timer bug with script engine

	Occurs when Script.clearInterval() called inside
Script.setInterval callback
Merge pull request #3440 from ey6es/master

Fix for eyes on skeleton (e.g., Mixamo) models.
Merge pull request #3442 from Atlante45/script_engine_fix

Fix timer bug with script engine
scripted motor params are now Q_PROPERTIES
merge upstream/master into andrew/ragdoll
Rejiggered the blender handling: allow up to N blenders active at once so
that with small numbers of avatars, the blenders can stack for lower latency.
headMove.js using experimental avatar motor
Merge branch 'master' of https://github.com/highfidelity/hifi
fix vertical jitter (for real this time)
Add option to toggle on/off names above heads
Hide name for all avatars, including MyAvatar
initial tuning of headMove.js for avatar motor
Merge pull request #3444 from AndrewMeadows/ragdoll

headMove.js uses avatar motor
Merge pull request #3441 from birarda/master

remove the access token from API urls and put in Authorization header
Merge pull request #3443 from ey6es/master

Allow blenders to stack up to a point in order to reduce latency with fewer avatars (but still cap work with lots of avatars).
add a DataWebDialog for authenticated access to data-web html