Flight controller, definition stuff, util stuff

FlightController provides our flight control algorithm. 
	-Comes with a reasonably thorough test setup that checks for 
	accuracy within a given time-slice error tolerance. 
	-Also comes with a demo application.
	-Currently demonstrated as controlling the gameplay height property
	(though in reality that will probably be the responsibility of
	a more powerful magic force as that property does not really obey
	the laws of physics)
	-Have yet to employ it on the orientation code; that will come
	tomorrow. 

Moved +/ created several utility functions/classes in the util package.

Did some stuff to allow DefinitionReference to be serializable.