added a piston class, not tested at all
fixed shooter
Merge branch 'chassis' of https://github.com/DevilTech/Robotics2014 into chassis

Conflicts:
	src/Competition/Wiring.java
	src/edu/wpi/first/wpilibj/templates/DefensiveArm.java
	src/edu/wpi/first/wpilibj/templates/Gatherer.java
	src/edu/wpi/first/wpilibj/templates/Shooter.java