Code review comment for lp:~gary/zc.buildout/python-support-6-egg-control

This branch hooks up the code introduced in ~gary/zc.buildout/python-support-5-initial-egg-control and thus fixes a significant problem for people trying to use this branch without allowing site-packages into the buildout.

It also is intended to be the final branch in the series, so I ran tests again on Python 2.4, 2.5, and 2.6, and on Windows. The Windows test had some failures (in the test infrastructure, not in the core code), so this branch fixes some of those failures as well (the ``do_build`` code and the change to dev.py).

Thank you

Gary