Use most recent versions of the used software.

Most important changes:
- Acrylamid 0.7.10
- Sass 3.4.7
- Compass 1.0.1

Keeping Jinja2 at 2.6 (while 2.7.x is already available) because of a
hard version pin in Acrylamid.
Keep the date on a single line.
Change the URL to my Google+ profile.
Small change to the about page.

This weblog does not really follow my personal evolution. :)
Remove the "about me" blurb at the bottom of each article.

Instead add links to the social networks at the end of the footer and
move the link to the Atom feed to right above the footer.
Change license from CC-BY 3.0 to CC-BY 4.0.
Remove fix for the iOS orientation change bug.

It seems to be okay now (tested it with iOS 7 on an iPhone 4).
Don't load the comment immediately.

Instead, use the Disqus API to retrieve the number of comments and
show this number on a button. The comments are only loaded after
clicking on the button.

Inspired by http://yizeng.me/2014/05/03/use-a-button-to-display-disqus-comments-count-and-load-comments-onclick/
Remove icon font and replace the RSS icon with an SVG.

The only icon left at this point was the RSS icon to draw attention to
the Atom feed. By replacing this with an SVG, we don't have to include
an icon font.

Although this may be a bit less efficient for users that visit more
than one article (since the SVG is included on all pages where it is
used while the font is downloaded once and cached by the browser),
most visitors only read one article anyway.
Remove prefixes for the box-sizing property.