Added new Packet field.
This will make it easier to parse and route incoming/outgoing packets.

	modified:   CameraManager.cpp
	modified:   CameraManager.h
	modified:   CmdModule.h
	modified:   LightManager.cpp
	modified:   LightManager.h
	modified:   PowerManager.cpp
	modified:   PowerManager.h
	modified:   SubControl.cpp
	modified:   SubControl.h
	modified:   SubProtocol.cpp
Navigation Module.

Added a new navigation modele that will be responsible for managing where the Sub is headed.
This leaves SubControl to just handle splitting each control vector among each motor.
This Nav module will be able to impart a feedback loop to improve control over the sub.

	modified:   Makefile.am
	modified:   Makefile.in
	new file:   Navigation.cpp
	new file:   Navigation.h
	modified:   SubControl.cpp
	modified:   SubControl.h
	modified:   SubProtocol.cpp
	modified:   main.cpp