REFACTOR: Consistent naming for sensor identifiers

Previously I was using a mixture of sensor/device/remote naming, which
was unnecessary.  Refactored for readability.
Code clean-up while I consider a restructure

(Guess who's trying out ReSharper?)
Reordered params on BodyFrameReadyEventArgs constructor for consistency
Simplified KinectDataPublisher

I'd previously kept a StuffBodyBag method in case I wanted to plug in some
pre-processing at that stage, but it is not adding anything at this point.
Removing.

ProcessBodies did not need to be public.