Note handoff between intake and shooter

[jkleiber]

Purpose
We need to get the logic working for handing notes from the intake to the shooter. The intake has a note sensor and the shooter also has a note sensor.

The logic should be as follows:

• we should intake a note no further than the indexer if the arm is not at neutral (zero)
• We should intake a note all the way into the arm if the arm is down
• If the arm has a note we should not allow intake (outtake is fine)

Project Scope

• Implement above logic in intake/shooter subsystems

[jkleiber]

Done in #42