New release of Bonobo needed.

[Miguel de Icaza <miguel helixcode com>]

Hello guys,

   Please back out Federico's memory leak fixes to BonoboPropertyBag.
We underestimated the time it would take to get the depending ORBit to
be released.  So in the meantime, to keep Bonobo in a usable state we
need to back out the test for the new ORBit version and backout the
memory leak fix.

   Once the next ORBit is released we can apply the patch back.

Miguel