[libunwind] new web site for libunwind project

[David Mosberger]

Finally I got around to put together a small web site for the libunwind
project.  It's hosted at:

        http://www.hpl.hp.com/research/linux/libunwind/

It has pointers to the mailing list (and archive), sample code etc.
As documentation gets written (yeah, right!), I'll add that, too,
of course.

Enjoy,

        --david