[style] new hr
[style] 2-pane navigation and layout change for footer above 70em
[style] [layout] padding fixes; .site-footer for large screens
[style] no more outside-aligned ul/ol for readability+emphasis
[style] more bottom padding for articles
Merge branch '2014-11-19-typography-and-color' into 2014-11-19-content
[fix] extra h1 in About