Add a more complex notebook to the examples

[betatim]

This is a more complicated notebook that I use to "test" things when I work on the notebook format (or as you can tell from its content, converting to other formats).

Would be good to add something like this to the examples to see how it performs.

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[inc0]

Thanks! I'm working on simple figures right now so that will be great next step once we have it!

[inc0]

https://github.com/machine-learning-apps/mystify/blob/figures/examples/example_figures.mystnb this is idea I'm playing with - putting figures (or really any hard to read content) to the bottom of the file and having references that'll point to it. I'd be curious what do you think about that approach?

[inc0]

@choldgraf ^ I'd love to have your feedback too about format