really should include created as well, but that would make things more
complicated, or maybe have a header that overrides the copyright year..

add ability to update blog posts, missing is proper redirect from the
old version.

`twitfetch.py` fetches the threads defined in `tweets.txt`, and
then the tmux.html has an example (will likely be made a macro
in the future)...

not all are replaced as they could be confused for regular chars
(like x for times and - for non-breaking hyphen), so those will not
be changed..

add missing import macro...
X-UA-Compatible is no longer useful..
name -> id
various mismatched tags..

[1] https://validator.w3.org/feed/

https://stackoverflow.com/questions/3558119/are-non-void-self-closing-tags-valid-in-html5

make the font a bit smaller, but larger on the sidebar...

move styling for sidebar into css from style attribute..

make sure my custom css can override the tufte css (to allow setting
the font size)..

convert the slug into a macro so it can be used else where

make the title link to a slug, but use -title since the bare
slug is the body which doesn't make it go to the title of the
blog post...

make a few of the side bar elements bold (the year and the month)..

as the months are always displayed, it just looks bad to add them there..

these are based upon slight modifications from the basic template...

The issue is that w/ mark'd sections, the anchors will be relative
to the imported doc and NOT the source document..  So the markdown
toc feature that adds anchors to header tags would create permanent
links that won't work in the long term.  This fixes them up.

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...