o Added support for role registration to Application.py
    Products may define a __.role_names in their __init__.py
    which may be a tuple of role names which will be added to
    the global list of role names which appears in the role
    assignment select box when defining/editing a user.

  o Application.Application now has a default __allow_groups__
    attribute which is a UserFolder with no members defined.
    This default top-level UF is not visible in the UI, and
    the user can create a new UF at the top level (in the
    Application object) at a later time which will simply
    override the default and be visible in the UI. Since the
    default UF has no users, an out-of-the-box application's
    management interfaces will effectively be available to the
    superuser alone.

  o Removed the __init__ in Folder which created a default ACL.
    This is no longer needed.

  o Made some minor (but controversial!) style consistency fixes
    to some of the OFS templates.

Folders now know about UserFolders by default. Added empty placeholder
help template.

setting headers work.

Modified basic template template to use standard header and standard
footer.

Made it more convenient to use manage_addDocument outside of web
context.