Route the cable from lower leg not through the upper leg shells

[michaelkubina]

Due to Channel-Request:

It was good idea to run the wire for the wrist servo through the upper leg.

Problem: The servo that is likely to get burnt(pwm control board) due to stall torque is ones on the wrists. This would require dismantling almost the entire leg, loosing calibration for all the servos on the leg in the process.

Wish: the wiring channel was accessible from outside without having to take apart the shells of the limb.