Added pilot limits to the autopilot, which will control how fast or how much
the autopilot will bank or turn.
Moved a lot of the loiter code from Dyn4Dof to the Autopilot, as it is going
to be the one who calculates loiter.
DynamicsModel was updated to take in two additional inputs:
   	maxTurnRate - how fast the pilot is limiting the turn
	maxBankAngle - how much the pilot is limiting the bank.
This will allow the autopilot to change the properties of turning, etc... based
on the mode it's in, without affecting the dynamics model.