MS Compiler to build Python 2.3 extension

[woodsplitter at rocketmail.com]

MS Visual C++ 6 is indeed the compiler that the python.org
distributions are built with, but MinGW works fine too.  In fact, the
code generated by MinGW-GCC 3.4.4 outpaces that generated by MSVC++ 6.0
by a considerable margin in some of my performance-critical extensions,
and the size of the binaries is often smaller.