Add changes to joystick_reader for third robot.

These were initially made by Natalia, with a lot of cleaning
up and additional changes by me.

(This was formerly a part of I3d012fb8a9652c0b85ed27f5d23fe7d63bb977ce.)

Change-Id: I23e19b7458dd8dba3b695b456917925d732c5606
4 files changed