favor of the versions sections.

Add default versions to the versions section, if possible.
This means adding a versions section (if necessary/possible).

commit.

specific to the way I was developing on mac.

IncompatibleConstraintError.

       correctly.

``versions`` section), so you know longer need to include::

   versions = versions

in a ``buildout`` section when pinning versions.

       (which is how the buildout script gets generated).

Fix macro inheritance bug

       options were treated as errors.

       (This was an ill-considered temporary attempt to
       make used of the new bootstrap script easier.)

Moved the download locatiion to downloads.buildout.org.

is preserved.

Tighten config file syntax to allow fewer variations.

       used.

under Python 2.

Correct the name of the file for Python 3.3.0, removing rc1.

for Python 3.