including both "virtual" and PYTHONPATH-based installs.  The activation
precedence of distributions has also changed so that PYTHONPATH-based
non-root installs can include eggs that override system-defined packages
(whether managed or unmanaged).  This version should eliminate most
common installation complaints from non-root Python users.
Note: this version includes a hacked 'site.py' to support processing
.pth files in directories that come *before* site-packages on sys.path.
However, because of its placement, it should only come into play when
a user puts the setuptools .egg file *directly* on PYTHONPATH, so it
doesn't affect "virtual" or "root" installations.  It's strictly to
provide support for luddites who refuse to give up their
existing non-root PYTHONPATH setup unless you pry it from their cold,
dead hands.  :)

--HG--
branch : setuptools
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/trunk/setuptools%4041262