Add new footer markup.
First version of new structure of request page

TODO:
Request status image
Profile photo
Update status box.
Outgoing message template

TODO:
Does not style warning about outgoing message not having been sent
Does not style hidden/requester only warnings.
Restore event_actions paragraph.

Needed for admin links and note when outgoing message hasn't been sent.
Add incoming correspondence template

TODO: Add a helper method to foi_attachment that returns one of a known
set of strings describing the attacchment type so that we can use it in
css classes.
Add template for comment.
First version of outgoing message resent.
Merge branch 'redesign' of ssh://git.mysociety.org/data/git/public/whatdotheyknow-theme into redesign