Unify feeds definition in actions
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.
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