Add additional motor and sensor input for shooter feeder

[dkt01]

Shooter feeder should consist of two motors: one for the bottom rollers and one for the top roller. This will enable gathering fuel into the feeder apparatus without shooting. Additionally, we will have a beam break sensor to detect when a ball is in position to shoot.

Changes necessary:

• Add the sensor and motor to begin.vi
• Add controls in feeder to control both motors
• Update I/O spreadsheet to reflect updates