RCBPanel: implement the control of all parts at once

[Nicogene]

We managed to control multiple parts of iCub, but for the moment we are controlling them sequentially. This may lead to discrepancies between the animation and the movements, also if the performances are pretty satisfying so far.

The best thing would be to command all the parts in parallel via:

• Use multithreading (this may introduce other problems, counting also that we are using python)
• Use controlBoard_remapper