Start support for Turret

Starting support for turret (Pan/Tilt).  Currently using right joystick
in special mode (use R2 button to choose walk mode).

Also fix Commander Input such that right joystick is actually right
joystick, dito left.

Also added code to AX12 driver, that if the robot is not walking it
plays with the LEDs on the servos such that hopefully I will not forget
to turn power off.  Also I set Digital servo pin 7 high, that I use to
enable an LED display.