Add parsing for channel artwork.
Improved auto-finding of feeds.
Search for https url by default when adding feeds.
Some small ui and internal improvements.
Bugfix - Wrong message was sometimes shown when adding feeds.
Regressions:
Channels on the feed management page show the channel artwork where the "unsubscribe feed" button used to be. You can still unsubscribe a feed by tapping the channel artwork, which will show the usual unsubscribe prompt.