Alternate feeds

• Podcast.__init__ (Ogg Vorbis Audio)
• http://podcastinit.podbean.com/feed/
• https://www.podcastinit.com/feed/mp3/
• https://www.pythonpodcast.com/feed/mp3/
• https://www.pythonpodcast.com/rss
• https://feeds.fireside.fm/pythonpodcast/rss