Merge branch 'master' of https://github.com/highfidelity/hifi
Fix interface log file location

Put in \High Fidelity\Interface\Logs rather than \interface\Logs.
Working on alternate IK mode.
Merge pull request #2857 from ctrlaltdavid/interface_log_dir

Fix interface log file location
Merge pull request #2858 from ZappoMan/modelserver

Fix bug where sometimes models don't render
Merge branch 'master' of https://github.com/highfidelity/hifi
More work on integrating IK solution from Sixense.
Merge branch 'master' of https://github.com/highfidelity/hifi
When PrioVR is connected but head rotation is unavailable, use Faceshift
rotation.
Try smoothing the PrioVR input over a couple of frames.
Fixed compile error.
send an updated address to data-server with domain (when changed)
Merge pull request #2860 from ey6es/priority

PrioVR tweaks: average over two frames, use Faceshift head rotation when PrioVR one is unavailable.
Merge pull request #2861 from birarda/master

send an updated address to data-server with domain (when changed)
Rotation bits for alternate IK.
Tabs -> spaces.
Add ability to anchor an overlay
Merge pull request #2863 from ey6es/master

Added alternate IK method for Hydras from code provided by Sixense.
Merge pull request #2864 from Atlante45/fix_jittery_overlays

Add ability to anchor an overlay
MenuOption::Visage now default to false.