Support jupyter notebooks

I’ve had a few people ask me whether they can simply write their examples in jupyter notebooks, rather than writing them as .py files first. Is there any plan to support things like plot_example.ipynb?

[agramfort]

for me it defeats the purpose/vision of sphinx-gallery

[Cadair]

I wonder if a better idea would be to write a converter from ipynb to a sphinx-gallery .py file. Things like adding in the comment lines around markdown cells etc. Basically the inverse of the .py->ipynb converter in SG itself. This is a workflow I end up doing manually quite a lot, write an example in a notebook, convert to sphinx-gallery format.