Syseggrecipe

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- Added Python 2.6 compatibility.

- Compensating for packages with underscore characters like ``MySQL_python``.
(Both fixes by benwah, thanks!)

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- Quick fix bug where buildout rmtree can't remove egg info/link files.

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- Re-released as 1.0 as it is stable now.

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- Back to symlinking instead of copying: some egg-info files are
actually directories. Downside: Windows is out of the door again.

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- We report files that we've added to buildout now so that buildout
automatically cleans them up for us. No more pollution in our
develop-eggs directory!

- Symlinking folders of non-egg distributions that we found in a
system directory turned out to be a bad idea. Some distributions
install files instead of directories (GDAL ends up as ``gdal.py``,
for instance). We now only copy the "egg-info" files, which turns
out to be enough for setuptools to find the distributions.

- Copying (see above) instead of symlinking means it also works on
windows again.

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- Fix in README for running sysegg standalone.

- Distributions that aren't eggs but directories directly inside a
``sys.path`` directory would have the actual system folder as their
location. This used to mean that everything in that system folder
can erroneously be used as a system egg. Not anymore, as those
directories are now symlinked directly instead of being used through
a too-generic ``.egg-link`` file.

- This recipe uses symlinks for the above fix, which means it doesn't
work on windows anymore.