[Pyobjc-dev] Object identity is now retained from Python to ObjC as wel.

[Ronald O. <ron...@ma...>]

Revision 1511 says:
- Rework the code that ensures that proxy objects are unique. Object 
identity
   is now preserved in both directions (see NEWS.txt for the limitations)
- Some more hackery on the number proxies:
   * Use __slots__ where possible to avoid adding a __dict__ to
     the proxies for NSNumbers
   * Implement __class__ for those proxies as well, this way the proxies
     seem to fit at the right place into the class hiearchy.
   * More unittests
- NSDecimalNumber is no longer proxied  to NSDecimal, because the latter
   is mutable.

----

Bob convinced me that the mutability of NSDecimal is a bad idea, that 
will be changed later on.

Ronald