Improve Python detection based on the PyPI malregistry

[tstromberg]

Basically, I banged on malcontent until it matched more and more of https://github.com/lxyeternal/pypi_malregistry

This included adding support for ".whl" (Python Wheel) files, which are just zip files by another name.

[egibs]

@tstromberg -- I went ahead and updated the test data to get this merged.