wubloader/playlist_manager
Mike Lang fae5267941 playlist_manager: Fetch first/last event info when fetching playlists
And switch to passing around a namedtuple of these + tags instead of just tags.

To avoid confusion with the list of videos in the playlist, we refer to this data as the "playlist config".
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playlist_manager playlist_manager: Fetch first/last event info when fetching playlists
Dockerfile Pin gevent version to work around build issues
setup.py Pin argh to avoid stupid breaking changes