www: Link to the polyhedral.info publication list
www: Separate out the Polly paper
www: Add a script to show the latest news from polyhedral.info
www: Add a script that allows us to obtain statistics about polly
www: Mark a couple of projects done

We now have both polyhedral dead code elimination as well as LNT buildbots.
www: Rewrite the intro about Polly
www: Remove warning about the implementation status

It does not seem to add a lot of value, as it leaves unclear which parts are
mature and whichs not. Adding this informatin also does not make sense, as it
changes rapidly.