Added Font Awesome icons

+ Modified static/bootstrap.min.css
    + Changed size/alignment of sidebar, content, topbar
+ Modified static/local.css
    + Changed alignment/reference for Atom, GitHub, LinkedIn, RSS, Twitter
+ Modified templates/index.html
    + Changed article.date variable to article.locale_date
+ Modified templates/metadata.html
    + Changed article.date variable to article.locale_date