Sidenotes from markdown

[gerwitz]

Ideally, markdown-it would output sidenotes instead of footnotes.

Alternatively, this could be done client-side with a fork of https://github.com/philgruneich/barefoot

[gerwitz]

More client-side options:

• http://acdlite.github.io/jquery.sidenotes/
• https://github.com/0gust1/md-vanilla-sidenotes

[gerwitz]

markdown-it-sidenote is a hack, but it's working