• Use "loose" parsing in DateTime::Format::Mail so that we don't die
  on invalid RFC-822 dates.
  
• XML::Feed::Entry->link on RSS feeds will now use a element
  if a element isn't found.
  
• Switched to using URI::Fetch when fetching feeds. Since we're not
  storing or caching feeds currently, this basically just buys us
  GZIP support, but that's something.