Resolves#70, Resolves#67
Still needs some regression testing in general, and a definite
regression is that rotary encoders are no longer (for the immediate time
being) supported.
Moves to a much simpler internal state tracking system, and FAR lighter
matrix scan.
Removes MicroPython support entirely.
- Lock our vendored dependencies (also pull in some new ones I will be
needing soon)
- Ensure we have a sane way of pulling those vendored dependencies into
the DFU-flashable images (upy-freeze.txt)
- Break up the Makefile into a bunch of smaller, sometimes reusable
chunks
- Add a noop keyboard that simply exits, so we can flash a "keyboard"
that just dumps us straight to REPL
- Remove my personal ampy config since that's not portable at all
