This PR disables handTouch.js.
handTouch.js allows the fingers to animate on the surface of an object.
However, it can sometimes detect collisions with walls or tables when the avatar is standing next to them.
We will more properly fix handTouch.js in a future PR, but for now we will disable the functionality.
Also, a small bug fix was made to the Rig to prevent the idleOverlayAlpha from exceeding the 0.0 to 1.0 range.
This can cause the fingers to bend incorrectly for a moment.
Also, three new items were added to the Developer > Show Animation Stats panel.
* Joint Override Count: displays the current count of joints that are overriden by MyAvatar.setJointRotation() JS API calls.
* Flow: displays if flow is active of disabled.
* Network Graph: displays if the network anim graph, used for teleportation, is enabled or disabled.
https://highfidelity.atlassian.net/browse/BUGZ-154
