Include a list of the urls that previous existed at URLS.txt

time, but only a date...  Time can be added once I figure out how
to handle timezones...  Always displaying in UTC doesn't make too
much sense, so maybe need to show the timezone as well...

page working...  This is more documented in NOTES.md, which will
be committed shortly..

Slight modifications to Tufte to have some space on the right, and
add a custom.css to style the tags a bit better...

We can drop article.j2 as it was a test and isn't needed anymore,
and macros.j2 is empty now, and may be used for other things in
the future...

duplicated..  This is to freeze a working version before I try
to make macros work via call blocks...

git-subtree-dir: tufte-css
git-subtree-split: e225f3a0e5