fewer empty hrefs
rooted URLs
deslashing
refactored sidebar
refactored default layout
return of the javascript https rewrite, but only for http://mayone.us

https://konklone.com/post/github-pages-now-supports-https-so-use-it
one column is the default
Merge branch 'master' of https://github.com/MayOneUS/mayoneus.github.io
disable JS redirection for now
Merge pull request #9 from idiomatic/master

refactored sidebar et al.
Tidy all top-level HTML

This should make it easier to modify this content in the future, and to
see the changes in diff form.

I used https://github.com/w3c/tidy-html5 so elements like `<header>`
would be recognized. I used the following tidy config:

    break-before-br: yes
    char-encoding: utf8
    drop-empty-elements: no
    drop-empty-paras: no
    indent: auto
    show-body-only: auto
    wrap: 0