master communication with any number of slaves is fixed up now. and speeds enhanced too. +1

Next:

- Pendulum enhancements (the shaft have some loose)

- More retouchs to have a Pytorch mode...

- Allow to save ngbrain weights (it should be ok from before)

- Wait Jetson Nano

- master-slaves PCBs optimization and test with more slaves connected.

- To fix some robot parts and continue printing parts