arm: Implement controls and programming for different positions

[szechy]

I think that by our next competition, we will want six possible arm positions that should all be tasked to buttons on the new big Logitech operator joystick. I've included the positions in the config file:

• 2 points: pyramidFront
• 2 points: pyramidRear
• 2 points: Feeder
• 3 points: pyramidFront
• 3 points: pyramidRear
• 3 points: Feeder

We need to have routines written that will access the internal variables for these string potentiometer positions, and then (probably) use a PID loop to get to the position. These positions, and the PID loop, will have to be tuned - hence the use of the text file.

Modifying the current armControl.vi should probably be sufficient for this, although we may need more internal variables for stating whether or not we are trying to reach one of these positions.