add Script.include()
add load script from URL support
add first cut at firstrun support
set firstRun so it only happens once
Merge branch 'master' of https://github.com/worklist/hifi into scripting_improvements
added hydraMove.js to default scripts
fix audio position in editVoxles.js
spread out billboard and identity fallbacks
send mesh and billboard on receiver's first connect
don't attempt to render avatars until they are initialized
Merge pull request #2480 from ZappoMan/scripting_improvements

Scripting improvements
force sending of identity and billboard packets changed in last frame
only fade avatars if they have ever been initialized
add stat for average billboard and identity packets per frame
Merge pull request #2488 from birarda/avatar-scaling

avatar-mixer tuning for identity and billboard packets
fix for stats styling
Merge pull request #2489 from birarda/avatar-scaling

cleanup of stats styling
increment framesSinceCutoffEvent in mixers to enable recovery
Merge pull request #2490 from birarda/master

properly increment framesSinceCutoffEvent in mixers
suppress sleep time debug in favour of stats in AvatarMixer