for versions if the given requirement had an upper limit and we
already had the distribution whos version was the upper limit.

Added simpler tested code that checks for the simpler case that teh
requirement is for a specific version and we already have that
version.  In general, specifying upper limits other than a single
version is kind of dumb, so it's not worth optimizing for that case.

Also rearranged some code to work with emacs python mode. :)

deterministic output by outputing all of standard output followed
by all of standard error.

Removed a test that was obsoleted by a setuptools improvement in
handling failed downloads.

Updated to reflect a change in bootstrapping. (I wonder why this
wasn't needed sooner.)

zc.buildout logger.  This reduces noise in the output.  This change
was so far reaching, I decided to go ahead and clean up lots of log
messages, adding some missing periods and adding quotes around
requirement strings and file paths.

in easy_install.py, added logging to show why distributions are added
in verbose mode and removed recusive code to show requirement chains
when errors occurred.

  an empty configuration file and then bootstraps.

- Except when using the new init command, it is now an error to run
  buildout without a configuration file.

- 75607: buildout should not run if it creates an empty buildout.cfg

setuptools requires that file urls that point to directories must
end in a "/".  Added a workaround.

  install and update methods.

- 59270: Buggy recipes can cause failures in later recipes via chdir

Also updated a test to reflect logging of script installation.

api to help clean up created paths when errors occir in recipe install
and update methods.

Made sure buildout exited with a non-zeo exit status when errors
occurred.

https://bugs.launchpad.net/zc.buildout/+bug/71353

Now use  system setuptools  if it is  available.  This can  also speed
bootstrapping,  since we  don't need  to download  setuptools  in more
cases.

https://bugs.launchpad.net/zc.buildout/+bug/105081.

packages that can't be found or that cause version conflicts.

packages that can't be found or that cause version conflicts.

Fixed a renormalizer to prevent spurious test failures,

packages that can't be found or that cause version conflicts.

Download caches didn't work on mac os x if directories in the download
cache path were symbolic links.