Fix type
Move thumbnails out of .entry-header
Edit entry meta to match different situations

* Removes confusing HTML from the author link
* Move the entry meta to the <header> in the third post
Increase base font size to 16px
Don't add monospace font size to all code elements, just <pre>

Otherwise they won’t inherit their parents font size when for example
used inside a <h1>
Sass: Fix deprecation warning when assigning to the global $classes variable
Sass: Remove the $list-description-indent variable
Remove the $media-responsive variable. Media should always be responsive
Sass: Add variable for figure caption font size
Formatting fixes
Sass: Add variable for the blockquote font size
rem, not px
Sass: Add post styles
Just center the <figcaption>, not all content in the <figure>