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.
Mirror/warning fixes.
This actually seems to work differently on OS X versus Linux.
Fix for audio toolbox.
Trigger fixes.
Fix for invalid projection matrix on startup.
Merge branch 'master' of https://github.com/highfidelity/hifi
Merge branch 'master' of https://github.com/highfidelity/hifi
Linux warnings fixes.
Formatting changes to walk.js 1.1

Minor formatting changes for HiFi coding standard compliance
Merge branch 'master' of https://github.com/highfidelity/hifi

Conflicts:
	interface/src/Application.cpp
Set face.
The spec actually says that the 'L' (should have been 'LL' anyway) isn't
necessary; the compiler will know to read the constant as a long long.
add a guard in case local audio cannot be handled
Merge pull request #3768 from Atlante45/mute_when_noisy

Mute when noisy / Pulsing mute button
Merge pull request #3769 from birarda/plugs

add guard for handling of local audio
Merge pull request #3758 from ey6es/master

Mirror/warning fixes.
Formatting changes
Minor formatting change
Merge pull request #3760 from DaveDubUK/20142

CR for Job #20142 - Walk Cycle Polish Description