Explore idea of accelerators

[whaleygeek]

On other projects, I have code that loads over the wire, some support functions on first connect. These support functions are custom to whatever IO is being performed, and accelerate things by doing more intelligent sensing at the micro:bit end.

Look at whether we could import that work into bitio as a way for any driver wrapper to transfer on boot it's own custom accelerator - this might solve the gesture response issue, and also make transfer of large amounts of data over the serial port more efficient (as they could be switched into binary mode for specific commands).