Inverted pick up axis and removed ultrasonic sensor because it is only returning 5 volts.
Merge branch 'aerialassist' of github.com:FRC2539/command-based into aerialassist

Conflicts:
	ControllerMap.h
	Subsystems/Shooter.cpp
removed all pneumatic elements including shifting gearbox piston and pickup open and close.

Changes to be committed:
	modified:   CommandBase.cpp
	modified:   CommandBase.h
	modified:   Commands/AutomaticPickupCommand.cpp
	deleted:    Commands/CloseCommand.cpp
	deleted:    Commands/CloseCommand.h
	deleted:    Commands/OpenCommand.cpp
	deleted:    Commands/OpenCommand.h
	deleted:    Commands/StartCompressorCommand.cpp
	deleted:    Commands/StartCompressorCommand.h
	modified:   Commands/UnblockShooterCommand.cpp
	modified:   OI.cpp
	modified:   OI.h
	modified:   RobotMap.h
	deleted:    Subsystems/AirCompressor.cpp
	deleted:    Subsystems/AirCompressor.h