Set org CSS/FURL from some pre-cooked YAML

* The Whitehall organisations API doesn't yet expose CSS or FURL.
  This fudge ensures we don't lose any data we used to infer from
  the now-defunct redirector-centric import (though it has no means
  of staying up-to-date with changes made there).
Correct DPM and No10 furls
Merge pull request #107 from alphagov/fudge-css-n-furl

Set org CSS/FURL from some pre-cooked YAML