[Distutils] setuptools 0.6a6 released

[Phillip J. Eby]

Release notes:

* Added support for "traditional" PYTHONPATH-based non-root installation,
   and also the convenient ``virtual-python.py`` script, based on a
   contribution by Ian Bicking.  The setuptools egg now contains a hacked
   ``site`` module that makes the PYTHONPATH-based approach work with .pth
   files, so that you can get the full EasyInstall feature set on such
   installations.

* Added ``--no-deps`` and ``--allow-hosts`` options to easy_install.

* Improved Windows ``.exe`` script wrappers so that the script can have
   the same name as a module without confusing Python.

* Changed dependency processing so that it's breadth-first, allowing a
   depender's preferences to override those of a dependee, to prevent
   conflicts when a lower version is acceptable to the dependee, but not
   the depender.  Also, ensure that currently installed/selected packages
   aren't given precedence over ones desired by a package being installed,
   which could cause conflict errors.

* Activated distributions are now inserted in ``sys.path`` (and the
   working set) just before the directory that contains them, instead of
   at the end.  This allows e.g. eggs in ``site-packages`` to override
   unmanaged modules in the same location, and allows eggs found earlier
   on ``sys.path`` to override ones found later.

* When a distribution is activated, it now checks whether any contained
   non-namespace modules have already been imported and issues a warning
   if a conflicting module has already been imported.

* Fixed a problem extracting zipped files on Windows, when the egg in
   question has had changed contents but still has the same version
   number.