Add a README.ipynb (and companion README.md) to every subdirectory

[russelljjarvis]

What happened to the code from converting pandas data frames to markdown?

This will be useful for writing manuscripts in Markdown.

[rgerkin]

I put a working example in a gist here.

But you don't even really need that. All you need to do is have a notebook README.ipynb in each directory, and then run jupyter nbconvert --to markdown README.ipynb in that directory and it should create a README.md Markdown file.