Change outp -> _outp.

The _outp version is recogized. This function is not allowed in user
mode in any case, this change is to avoid compiler link errors. The
parallel support is probably dead at this point.
Comment out debug code using SHGetSpecialFolderPath.

That function is no longer supported and hasn't been since Windows
2000. This avoids a link error.
Make setup.py handle the FLI library compilation.

This is easier than making the Makefile portable and simplifies the
build.
Update the documentation now that things work on Windows.

Mention that the package is available and document installation on that
platform.