rm legacy files
Adjust typography for headers

* Serif for <h1>s
* Sans serif for byline
* Higher line height for <h1>s except in the header
Adjust typography for blockquotes
Adjust typography for comments

* Sans serif
* Smaller font size
rm empty file
Adjust typography for <code>
Consistent spacing for nav links

* Move nav links out of <article> on images
* Add space after nav links
Swap next/previous links to preserve sanity
Adjust spacing before nav links on archives

* Also rm an extra </div> in regular snippets