Added readme with basic infor, still to be finished
Added unfinished version of Arduino code generator.
Updated main Arduino generator file and text
  Text is not finished, but most blocks are usable, so it will be parked for a while until the other blocks are finished.
Enabled Arduino code generation in:
  new "code_duino" app, based on "code" to test changes
  test/playground
  test/generator/index