[Distutils] Source and patch: swig support (and more)

The included source code and patch implements a swig class (derived from ccompiler). Currently the swig options used cannot be configured with command-line flags or somehow else although they certainly should. Simply include 'xxx.i' files into your extension source-files, and swig will be used to generate 'xxx.cpp' files, which will then be compiled and linked. Other stuff included (only useful for the windows crowd) Resource scripts (*.rc) and message compiler files (*.mc) can also be used as extension source files, and MSVC will invoke rc.exe and mc.exe to create .res files and pass them to the linker. Comments welcome! Thomas