Update to walk.js v 1.1

Revised code structure (see /libraries for new files), walk animation
completely overhauled (now using geometric wave generators, Fourier
synthesis and Butterworth LP filtering for selected motion curve
construction), redesigned sidestepping animations, tweaked flying
animations, decreased maximum walk speed in Interface to more natural
human value, improved Hydra support, added support for Leap motion,
animation file sizes optimised, cleared out code used to work around now
fixed bugs, lots of minor tweaks and improvements. walk.js is now under
100,000 characters, but I had to use tabs instead of 4 spaces to get it
below the threshold.
Suppress repeated Hash mismatch debug messages
Base implementation for own reverb
Remove debug
Move AudioEnv packet send to own function

	Audio environment packet moved to own function and out of the
if/else
	So it is now sent all the time, now matter if there are other
people around you
Merge branch 'master' of https://github.com/highfidelity/hifi into reverb_for_own_voice
Add WebWindow widget for scripts
Add grid tools to entity edit tools
Extra lines
Reference and comments
Merge branch 'master' of https://github.com/highfidelity/hifi into reverb_for_own_voice
Magic numbers and casts
Formatting changes to walk.js 1.1

Minor formatting changes for HiFi coding standard compliance
Formatting changes
Minor formatting change
Merge pull request #3760 from DaveDubUK/20142

CR for Job #20142 - Walk Cycle Polish Description
Add Grid3DOverlay
Update grid tool html location
Add grid tool menu option
Add Grid3DOverlay to Overlays