Add skeleton tracking toggle in options menu in interface.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	interface/src/Application.cpp
	interface/src/Webcam.cpp
	interface/src/Webcam.h
Merge pull request #747 from LionTurtle/master

Add skeleton tracking toggle in options menu in interface.
fixed a problem with emitters not being coordinated with Leap fingers
Merge remote-tracking branch 'upstream/master' into particles