[Distutils] zip imports ftw

[Daniel Holth]

It is because the file has a controversial coding style, with up to 25
lines of whitespace between classes, and includes functionality for
eggs and some other stuff that was unwanted on top of the resources
stuff that partly made its way into pkgutil.

I am really impressed with the file after seeing how easy it was to
add PEP-345 and PEP-376 support to pkg_resources.py without having to
present a different API to the user, and seeing how it provides a lot
of what an installer needs especially being able to iterate over all
the distributions in a particular folder, but I am glad it is not in
the stdlib because I wouldn't have been able to do that if it was.