Chapter Prose

First draft of the chapter prose, in rst form for now. I'm requesting PR to have someone look at the prose. I've also included an svg diagram, but you'll have to pull the repository to see it. I don't think it's viewable within github...

If you want to pull this, this is the 'chapter' branch from https://github.com/malini/500lines
Agree with Nolan here; this might be better much earlier, such as in the "This project contains python files for each..." section. You could pare down the prose there, and let the diagram explain the code base layout.

One more suggestion for the diagram: if you move the two handle() boxes for dispatcher.py up (so they're right under dispatcher.py), you can move runner_checker() and redistribute() down, and can draw lines to illustrate the message those latter two functions send.