A large refactoring of parts of the librivox service script.
It now uses the librivox rss feed instead of trying to scrape info from html page for info about chapters.

The downside of this is that chapter names are not very well suported in their rss feed (Librivox.org bug...), so many books now just have chapter names like "Chapter 01" instead of the real name that was previously availalbe.

The upside however is the the service now actually works for all books, including all compilationst hat previously did not work at all, and the service itself is much simpler to maintain.