Added support for wide-image headers w/opengraph support
Stop disqus from picking up localhost as a thread target.
Make sure floating elements aren't near headings or tip-boxes
Use image in top-matter for og:image
Make headings less cramped
Fix RSS link so bots can find it. Add Disqus comments if enabled.

Based upon 5d0fb9e7348537637ae0d1c9c98b73c427a32569 by the
amazing @evmcl.
Added RSS feed icon
Added flickr link
Optimise background images.
Added optional post footer (appears after share)
Added fancybox support and {% fancybox %} tag
Fix image links in css
Allow multiple classes in fancy image tags