Weaklink most toolbox modules, improving backward compatibility. Modules will no longer fail to load if a single routine is missing on the curent OS version, in stead calling the missing routine will raise an exception.

Should finally fix 531398. 2.2.1 candidate.

The MacOS toolbox modules have acquired an _ in front of their name. Normal usage is through a wrapper module (without underscore) which lives in the Carbon package.

Lots more Carbon/Carbon.h includes, new UPP routine names, function prototypes. Most toolbox modules now compile, link and import in MacOSX-MachO python.

functions. Include it in stead of duplicating the declarations everywhere. Also
cleaned up toolbox module exports, and got rid of resNotFound error.

- Use Universal Headers as input
- Change addpack calls to not depend on Guido's disklayout
- Checkge testprograms to use new names for some functions