[Snek] [keith-packard/snek] a23f6d: Update README to mention eeprom use on Arduino

[Keith Packard]

  Branch: refs/heads/master
  Home:   https://github.com/keith-packard/snek
  Commit: a23f6dda65bd79b74edbed6272ab32406ee5f810
      https://github.com/keith-packard/snek/commit/a23f6dda65bd79b74edbed6272ab32406ee5f810
  Author: Keith Packard <keithp at keithp.com>
  Date:   2019-02-10 (Sun, 10 Feb 2019)

  Changed paths:
    M README.md

  Log Message:
  -----------
  Update README to mention eeprom use on Arduino