Use VS 2012

Gotta love Visual Studio.  Can't even open a project without it making
loads of meaningless changes.
Change "Modified" to "Updated" for Atom

I don't think Atom feeds use the word "modified".  Prooflink:
http://www.ietf.org/rfc/rfc4287.txt
Use entry link instead of feed link

Each entry might have its own link.  If so, we should use that instead
of the link from the atom feed.