Committing in a collection of ongoing port work from #589636, so that we can stop trying to track it all in patches.

Will make merging in changes (with an outside dvcs) from the 6--1 branch easier, anyway.

Also forgot to merge a todo in last commit.

First steps toward updating CTools to d7. This contains some stuff found by coder module, plus css.inc should be fully ported. No testing performed though, so theres probably bugs. Need to write some tests or something.

#545540 by Roger López: Add 5 page elements as available panes for using Panels as your primary page layout: breadcrumb, page title, messages, tabs and help box.