Let's try actually releasing the camera when we turn it off.
Merge branch 'master' of https://github.com/worklist/hifi into kinected
Shut down the webcam when it's turned off, but don't delete the grabber (since
it has expensive-to-init state like the face cascade).
Make sure we shutdown before quitting.
Merge branch 'master' of https://github.com/worklist/hifi into kinected
Removed stray block.
Merge branch 'master' of https://github.com/worklist/hifi into kinected
Merge pull request #650 from ey6es/kinected

Bugfix: Turn the camera off when disabled.