Add syntax for notes/asides
We can depend on the Admonition extension for Python's Markdown module, and use:
!!! tip
Blah blah blah
Or we can add our own Markdown extension that uses a slightly different syntax; for instance, DocC's notation:
> Tip: Blah blah blah
In general, we want:
- tip
- note
- important
- warning
with the option of adding more in the future.
Edited by Emmanuele Bassi