More streamlining styles and markup.

* Adds padding by default to article element, to help with styling on colophon
  and record browse pages.
* Switch back to page layout on colophon.
* Removes unneeded markup on student and institution browse pages.
* More semantic and generic ID value for record listing.
Moar streamlining.

Moves padding to more generic container. Sets overrides on home page and
individual program pages.