[Dune] Dune 2.0 release

[Christian Engwer]

Dear all!

I am please to announce the release of Dune 2.0.

Thanks to all developers for this big effort. This new release marks a
major milestone for Dune. It contains many major updates and new
interfaces. But I will not bore you with details, most of you should
know them anyway. For details, have a look at the release notes
http://www.dune-project.org/releasenotes-2.0.html.

The website should be updated iwithin the next 30 minutes and I'll
submit the news to a list of mailing-lists, websites, etc.

Cheers
Christian

PS: I created a wiki page with the details of "what to remember" when
    announcing a new release.