Support for Atom download

Inside of Hydrogen (Atom Package), we use plotly.js to display plotly responses from a kernel. However inside atom, clicking links does not work the same as a normal browser. Therefore the download plot as png button does not behave as expected (it returns a success message and says the plot is downloaded, but it never actually is). I have code that could do the intended result, but that would require downloading your library modifying it and publishing the modified version. I would then have to continue to update as you guys update. So I prefer if I could have a way to support it natively.

const electron = require('electron');
electron.remote.getCurrentWebContents().downloadURL(insertCreatedUrlFromPlotly);

See nteract/hydrogen#1653 for example and original issue

[wadethestealth]

Works like a charm @etpinard. Thanks for the help 😄

[wadethestealth]

This looks very promising I’ll try it out