Link to libparson.
Moved libparson into it's own external library. This will make it easier to keep it up today with
the original project. It also makes it easier to share between projects.

	modified:   Makefile.am
	modified:   Makefile.in
	deleted:    parson.c
	deleted:    parson.h
Power Manager: PWM & Power Monitor.
Power Manager is now set up to monitor both the PWM Volt/Temp and PowerMonitor.

	modified:   Makefile.am
	modified:   Makefile.in
	modified:   PowerManager.cpp
	modified:   PowerManager.h
	new file:   Variable.cpp
	new file:   Variable.h
Removed Voltage as it is no longer used
Refactoring.
Consolidated various minor structs/class into a single uniform "Variable" class.
Removed GetConfigData() virtual method.
Massive tidy up of the JSON protocol.

	modified:   CameraManager.cpp
	modified:   CameraManager.h
	modified:   CmdModule.h
	modified:   LightManager.cpp
	modified:   LightManager.h
	modified:   Logger.cpp
	modified:   Makefile.am
	modified:   Makefile.in
	modified:   Motor.cpp
	modified:   Motor.h
	modified:   Navigation.cpp
	modified:   PowerManager.cpp
	modified:   PowerManager.h
	modified:   SubControl.cpp
	modified:   SubControl.h
	modified:   SubProtocol.cpp
	modified:   SubProtocol.h
	deleted:    Value.cpp
	deleted:    Value.h
	modified:   Variable.cpp
	modified:   Variable.h