Change comments in _defaults. Use Label instead of heading
Remove pre style rules from elegant.css. Bootstrap and Pygments have them defined already
Fix Solarized Light Pygments theme. Make it easier to change Pygments theme

The style is also slightly changed
Display article summary in index.html
Add humans link.
French translation.
Update font-awesome and use minified version.
Set HTML lang based on article.lang.
Change share post link.