Add Jupyter notebook integration

[sloria]

konch -s notebook

This should open a Jupyter notebook with `context included.

[sloria]

It would be nice to display the context (possibly in a markdown cell) in the first cell of the notebook.

[brl0]

I really like this idea, and was doing some quick digging. I came across Jupytext which may help.
The following converts the .konchrc file to a notebook:
konchrc = jupytext.readf('.konchrc', fmt='py')
jupytext.writef(konchrc, 'konchrc.ipynb', fmt='ipynb')

Let me know your thoughts and I would be happy to try to help move this along.

[brl0]

I just learned that IPython (and Jupyter) use Traitlets.

Traitlets is a framework that lets Python classes have attributes with type checking, dynamically calculated default values, and ‘on change’ callbacks.
The package also includes a mechanism to use traitlets for configuration, loading values from files or from command line arguments.