Added cover for site index.

If the first post in The Loop on the site index has a featured image, it
will appear in full bleed.
Added Twitter, FB, and G+ profile links

if they exist.
Tweaked post meta stuff.
Updated compiled stylesheet
Updated base styles

Un-bolded default links, added styling for post image, code, and pre
tags.
Adjusted entry meta section styling
Added font weight

after its removal from default links
Added Nicolas Gallagher's clearfix.
Added bottom border for imageless related posts