Update README.
Update README.
Use nanoc-external filter.
Use Coderay consistently with (Multi)Markdown.
Update MultiMarkdown sample post.
Use Pygments for syntax highlighting.

Add the pygmentize gem.
Use Pygments instead of Coderay in blog rules.
Add a sample CSS to style Pygments’s output. The
CSS was created with:

    pygmentize -f html -S colorful -a code
      >content/assets/stylesheets/colorful.css

Add a partial to include the CSS in the pages
that need it. Override a couple of Foundation’s
CSS rules for a better output. Those will be
probably moved in a SCSS override file later.
Ignore included SCSS files.
Add Foundation overrides and custom SCSS file.
Inherit background color in code blocks.
Add Github color style and make it the default.

The style comes from

    https://github.com/richleland/pygments-css

I have only prefixed each rule with ‘code’.
Remove Coderay gem.
Use different RSS icon.

For some reason, with Font Awesome 4.2.0 fa-rss
is not visible. (A FA bug? Even on their web site
the icon does not appear.)
Remove redundant line.