[Nautilus-list] back on bonobo HEAD

[Darin Adler <darin eazel com>]

When you next check out Nautilus, you should also get HEAD of Bonobo and of
xpdf as it now says in the Nautilus README. PR2 development has moved to a
branch so there's no need to use the out-of-date Bonobo any more.

People who use eazel-hacking should just update before they rebuild. The IDL
problems we had last time we changed Bonobo versions should not be a problem
this time.

    -- Darin