Adjusted the test so that it also works when you're testing with an older setuptools version and there's a new one on pypi.
In that case, the _call_easy_install call will really try to install setuptools first and execute other code paths than the test cares for.
A cleaner way does not seem possible as the easy_install code is really intertwined.

Merged -r105475:105584 svn+ssh://reinout@svn.zope.org/repos/main/zc.buildout/branches/reinout_distribute_upgrade_check
This is the fix for an infinite recursion when updating Distribute.
Solved by using the available setuptools/distribute for easy_installing the Distribute tgz instead of searching for it, which tries to install, which searches...

Revert to old style path.

- Incrementing didn't work properly when extending multiple files.
  https://bugs.launchpad.net/zc.buildout/+bug/421022

windows, urllib raises an invalid ioerror.

windows, urllib raises an invalid ioerror.

  The standard Python -m option didn't work for custom interpreters.

  Scripts run using generated interpreters didn't have __file__ set correctly.

  Scripts generated with relative-paths eanbled couldn't be
  symbolocally linked to other locations and still work.

  Option incrementing and decrementing didn't work for options
  specified on the command line.

No commit message

(Also stop writing doc.txt. --long-description is better. And
rearranged setup.py a little.)

- When doing variable substitutions, you can omit the section name to
  refer to a variable in the same section (e.g. ${:foo}).

- When doing variable substitution, you can use the special option,
  ``_buildout_section_name_`` to get the section name.  This is most handy
  for getting the current section name (e.g. ${:_buildout_section_name_}).

- A new special option, ``<`` allows sections to be used as macros.

refer to a variable in the same section (e.g. ${:foo}).

When doing variable substitution, you can use the special option,
``_buildout_section_name_`` to get the section name.  This is most handy
for getting the current section name (e.g. ${:_buildout_section_name_}.

(Also removed some extra imports and made formatting changes.)