Initial commit seems to be working...
Fixed bug getting max voltage for encoder 3
Initial button code seems to be working
Got button long-press events working
Holding down A and B for motor calibration works.
Removed debugging callbacks
Merge branch 'f/buttons' into develop

Conflicts:
	src/main.cpp
Added "Robot" object for keeping track of robot related stuff
Controlling motor power works...
Fixed bug setting directions for motor 3
PID controller seems to work
Motor calibration, const velocity seems to work...
Const velocity moves, calibration seems to work now
Merge branch 'f/motor' into develop