Modified HandCycler to avoid failed attempt to find HandController via GetComponent.
Fixed scene selection bug where last menu selection could influence definition of Next, Previous and Current scenes.
Corrected names of surface shaders.
Merge commit 'eba5f39e201d6fbf4bdb76b2a8fc0003a3690b1c' into update-LMVRA
Forcing passthrough shaders to be drawn as background (first pass rendering).

This prevents the passthrough from being drawn over the hand models.
LeapMotionVRAssets meta data
FIXUP: Adding Queue = Background tag to RGB shaders
Adding surface passthrough shaders
Shader meta files
Merge remote-tracking branch 'origin/v2' into feature-StereoTexture.

Conflicts:
	LeapMotionVRAssets/Assets/LeapMotion/Materials/DistortMat.mat
	LeapMotionVRAssets/Assets/LeapMotion/Shaders/LeapIRUndistortedSurface.shader
	LeapMotionVRAssets/Assets/LeapMotion/Shaders/LeapRGBDistorted.shader
	/Users/ghare/vr-demos/Assets/Scenes/partial/HulkSmash/PassthroughWall.unity
	/Users/ghare/vr-demos/LeapMotionVRAssets/Assets/LeapMotion/Scripts/LeapImageSurface.cs
	/Users/ghare/vr-demos/LeapMotionVRAssets/Assets/LeapMotion/Shaders/LeapRGBUndistortedSurface.shader