TODO.md

• Figure out the interface for flash
  • Remove the sim? It's unrelated really.
  • Add a JS partial flashing implementation, perhaps based on the prototype app
  • Consider a full flash implementation later... for now we'll need to indicate lack of support somehow with a structured error code?

Doc links for the memory map:

• https://microbit-micropython.readthedocs.io/en/v2-docs/devguide/hexformat.html
• https://github.com/lancaster-university/codal-microbit-v2/blob/master/docs/MemoryMap.md