Added SpinupShooter command, to get the shooter to the correct speed
before shooting.
Still need to calibrate the constants that are used though. Shooter
Subsystem has been changed to a PIDSubsystem. We should probably do that
for the ShooterElevatorSubsystem as well.
Merge branch 'master' of https://github.com/NorthernForce/NorthernForce-Robot-2013

Conflicts:
	OI.h

(There was really no conflict, the exact same change had been made)