Mac OS 10.2.8 installation requires some care.  The setupConfig.py
checks for ``os.name == "posix"``, assuming that all POSIX
installations have a C compiler.  Since the CC is optional on Mac OS
X, this must be commented out for the few Mac OS X users without the C
compiler installation.

I set lines 22-28 as follows::

    ## we only assume the presence of a c compiler on Posix systems, NT people will
    #  have to enable this manually. 
    ext_modules=[]
    #if os.name == 'posix': # remove for Mac OS X.
    #    ext_modules=[Extension("Cheetah._namemapper", [os.path.join("src" ,"_namemapper.c")]

-- StevenLott_ - 27 Dec 2003