Add base.html from simple theme
Use tabs for indentation
Remove classes and ids

Subtitle is wrapped in a span, instead of strong
Remove categories from <nav>

By default, categories are displayed if DISPLAY_PAGES_ON_MENU is false.
This might be undesirable.
Remove default Pelican footer
Add index.hmtl from simple theme
Use tabs for indentation
Restructure index.html

Removed classes and ids, and unwanted elements.
Move container to base.html
Add <time> tag
Add article.html from simple theme
Restructure article.html

Remove title links and unnecessary classes.
Add article and time tag.
Add block content_title to index.html
Add html title to article.html
Add templates extending base.html

archives, categories, tags templates adapted from simple theme.
Add templates extending index.html

author, category, tag templates adapted from simple theme.
Add <ol> to archives.html

Archives.html is now similar to index.html. Which I could extend from
index.html instead, but archives is using another loop: `for article in
dates`.
Some cleanup
Fix incorrectly closed tag
Add pagination.html template