descriptors in stead of manual getattr hooks to get at attributes
of the objects.
For Qd I have in stead gotten rid of most of the attribute access
in favor of the carbon-style accessor methods (with the exception
of visRgn, to be done later), and of the Carbon.Qd.qd global object,
for which accessor functions are also available.
For List I have fixed the fact that various methods were incorrectly
generated as functions.
CF is untouched: PEP252 doesn't allow "poor-mans-inheritance" with
basechain, so it will have to wait for PEP253 support.
blacklisted, because they are not available in classic 68k programs,
and bgen doesn't have a way to put #ifdef/#endif in the generated
code. For now we only implement calls that work on all three models.