Pretty much a one-commit redesign

Thanks, CodePen!
post previews, lists, descriptions,
RWD sidenotes, stole the stolen MVCSS grid, fallback fonts
Footer, code font, size, and word-wrapping, link hovers,
Made CSS more and less modular
Responsive Sidenotes, inline code tweaks

WHOOOOOOOOOOOOO
Merge branch 'v5'