Support for Paged Feeds

[timpritlove]

When reading podcast feeds, please support Paged Feeds based on RFC 5005 as summarized here:

http://podlove.org/paged-feeds

Basically, feeds get extended by a set of multiple feeds interlinked via <atom:link rel="next" href="{next-feed-url}"> elements. The parser should read all linked feeds in order and treat it as one big feed.

On the output side, Bitlove should also use paged feeds and split the pages at the same number of episodes as the original feed.

Alternatively, the BitTorrent feed should put all episodes in one feed although this might create really huge feeds.