Set up joystick for teleop

[bgrayd]

Set up for teleoperation of the robot through a joystick device.

Using the ROS joy node will make it easy.

Left joy stick controls left side, right joystick controls right side (for the drive motors) both just using forwards and backwards.

Left and right triggers (xbox 360 controllers have these as analog) for controlling movement of the main arm.

The bumpers above the triggers for controlling the front plate.