prepare CanHandler for device subrscription
start using DeviceManager
start using DeviceManager
fix bug with brake pedal
Merge branch 'ArduinoDue' of git://github.com/neuweiler/GEVCU

Conflicts:
	DeviceManager.cpp
	GEVCU.ino
	Throttle.h
	device.h
	throttle.cpp

There were some problems because I forgot to synchronize the ArduinoDue branch with
changes that had been done in the master branch. Hopefully this works...