Update example astrocyte analysis notebook

[pgetta]

• Make the notebook work with the latest NeuroM
• Add astrocyte selection and download from NGV static server
• Make figures larger

[codecov-commenter]

Codecov Report

Merging #959 (4516c75) into master (830cd7d) will not change coverage.
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[asanin-epfl]

you can use plotly if you want plots to be nicer, scalable, manipulable by user.

[pgetta]

That would be really nice, do you have by any chance an example how this can be done?

[asanin-epfl]

a neighbor tutorial getting_started.ipynb contains examples of plotly graphics in the beginning.

[asanin-epfl]

Also would be good to rename Neuron id to Astrocyte id in "Morphology Analysis" paragraph.

[pgetta]

Thank you, Aleksei,
Indeed, plotly works better for this case, I've also renamed neuron to astrocyte in the morphology analysis paragraph.

Anything else of concern?

[asanin-epfl]

no, everything should be fine by now

[pgetta]

Thanks!