Setuptools

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* Reverted change made for the DistributionNotFound exception because
zc.buildout uses the exception message to get the name of the
distribution.

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* Distribute 90: unknown setuptools version can be added in the working set
* Distribute 87: setupt.py doesn't try to convert distribute_setup.py anymore
Initial Patch by arfrever.
* Distribute 89: added a side bar with a download link to the doc.
* Distribute 86: fixed missing sentence in pkg_resources doc.
* Added a nicer error message when a DistributionNotFound is raised.
* Distribute 80: test_develop now works with Python 3.1
* Distribute 93: upload_docs now works if there is an empty sub-directory.
* Distribute 70: exec bit on non-exec files
* Distribute 99: now the standalone easy_install command doesn't uses a
"setup.cfg" if any exists in the working directory. It will use it
only if triggered by ``install_requires`` from a setup.py call
(install, develop, etc).
* Distribute 101: Allowing ``os.devnull`` in Sandbox
* Distribute 92: Fixed the "no eggs" found error with MacPort
(platform.mac_ver() fails)
* Distribute 103: test_get_script_header_jython_workaround not run
anymore under py3 with C or POSIX local. Contributed by Arfrever.
* Distribute 104: removed the assertion when the installation fails,
with a nicer message for the end user.
* Distribute 100: making sure there's no SandboxViolation when
the setup script patches setuptools.

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* Added "check_packages" in dist. (added in Setuptools 0.6c11)
* Fixed the DONT_PATCH_SETUPTOOLS state.

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* Distribute 58: Added --user support to the develop command
* Distribute 11: Generated scripts now wrap their call to the script entry point
in the standard "if name == 'main'"
* Added the 'DONT_PATCH_SETUPTOOLS' environment variable, so virtualenv
can drive an installation that doesn't patch a global setuptools.
* Reviewed unladen-swallow specific change from
http://code.google.com/p/unladen-swallow/source/detail?spec=svn875&r=719
and determined that it no longer applies. Distribute should work fine with
Unladen Swallow 2009Q3.
* Distribute 21: Allow PackageIndex.open_url to gracefully handle all cases of a
httplib.HTTPException instead of just InvalidURL and BadStatusLine.
* Removed virtual-python.py from this distribution and updated documentation
to point to the actively maintained virtualenv instead.
* Distribute 64: use_setuptools no longer rebuilds the distribute egg every
time it is run
* use_setuptools now properly respects the requested version
* use_setuptools will no longer try to import a distribute egg for the
wrong Python version
* Distribute 74: no_fake should be True by default.
* Distribute 72: avoid a bootstrapping issue with easy_install -U

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* Unified the bootstrap file so it works on both py2.x and py3k without 2to3
(patch by Holger Krekel)

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* Distribute 65: cli.exe and gui.exe are now generated at build time,
depending on the platform in use.

* Distribute 67: Fixed doc typo (PEP 381/PEP 382).

* Distribute no longer shadows setuptools if we require a 0.7-series
setuptools. And an error is raised when installing a 0.7 setuptools with
distribute.

* When run from within buildout, no attempt is made to modify an existing
setuptools egg, whether in a shared egg directory or a system setuptools.

* Fixed a hole in sandboxing allowing builtin file to write outside of
the sandbox.