Repair of 'Learn how to submit' button style
Footer fixes (alignment, shorter text for 2-line layout)
Cosmetic fixes for publication covers on home page
Fixes to page layout, News box (incl. RSS icon), two-column top alignment.
Home page layout fixes (matching heights, smaller mailing-list box)
Merge pull request #138 from datadryad/jima-sitewide-cleanup

General cleanup (see commit comments for details)