- removed special PluginIndexes handling in Product initialization code

- added more XXX comments to the regression tests (don't know how to run and fix them)

- added XXX comments to the regression tests (don't know how to run and fix them)

o Added tests for previously-untested clients.

o Uupdate versions for new location:

  - zope.pagetemplate==3.5.0
  - zope.app.pagetemplate==3.7.0
  - zope.app.publisher==3.8.1

Catch up with the rest of the Zope Toolkit of the day and loose dependencies on zope.app.appsetup, zope.app.component and zope.app.container.

Updated packages: pytz 2009g, zope.browser 1.2, zope.container 3.8.2, zope.lifecycleevent 3.5.2, zope.location 3.5.4, zope.publisher 3.7.0, zope.testing 3.7.4.

Testing.ZopeTestCase: Include a copy of ZODB.tests.warnhook to silence a DeprecationWarning under Python 2.6.

These changes weren't discussed with the community first, they break backwards compatibility, and environment should logically be one dict-like object, not a sequence of dicts.