Currently the FeedManager provides no ability to iterate the feeds
it is managing. If one forgot the save the Collection returned by
addFeeds() or added the feed to a list from addFeed(), then it
becomes hard to work with the manager.
Since the Map of managed feeds is private, there is no way to
grab, say a KeySet iterator and loop over the feeds and get at
Also a count()/size() and get by index might be useful additions to