robot.py: convert getOrientation to thread

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
add shutdown move

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
calculate moveforward delay instead of hardcoding it

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>