py-Pyro: updated to 4.63

Pyro 4.63
- fixed bug in autoproxy logic where it registered the wrong type if daemon.register() was called with
  a class instead of an object (internal register_type_replacement method)
- added check in @expose method to validate the order of decorators on a method (@expose should come last,
  after @classmethod or @staticmethod).
- added resource tracking feature (see 'Automatically freeing resources when client connection gets closed' in the Tips & Tricks chapter)
- the warning about a class not exposing anything now actually tells you the correct class

(adam)