I got a little sick of trying to keep the export data and <head> links
synched in actions, so I made a common method, getFeeds(), which gets
the feeds for both. It returns an array of Feed objects, which know
about what their mime type is, title, location, all that jazz.
I changed the FeedList class so it handles the new Feed objects
instead of the old array of data.
I changed all the actions that show feeds (I think...) so that they
now use getFeeds() for all their feed needs.
I modified public.php to use the new UI framework. Since the Action
class isn't functional yet, I don't know if it works.
I took some of the functionality, like the public tabs nav and the
feeds list, and made them widgets.
I also moved the navigation from common_navigation() to a method of
Action.
