Local modifications to The Chain, and compilation
Added code padding fix
Made footnotes tiny.
Added social share links and optional FB comments

The links are to tweet, FB like, and Google +1 an article.  Facebook
comments can be enabled for any post that uses "comments: true" in the
front matter.
Removed spacing from a few HTML5 elements.
Fixed spacing issue in "Two Years Gone"
Removed some Chain junk and added button style.
Moved The Chain to a vertical layout.
Updated markup for Bootstrap 3 and FA 4
Further Bootstrap 3 tweaks.
Added centered text style to The Chain.
Merge pull request #3 from tnwae/HEAD

Head