Changed standard_html_header, standard_html_footer, and standard_error_message to use new DTML syntax.

<dtml-var zope_quick_start>

instead of the old, inaccurate and hard-to-edit "Welcome to Zope" page

Added __len__ method of sequence_variables class for processing of len inside cDocumentTemplate len function when they're pushed on the stack.

Changed manage_access to work properly, and converted RoleManager's manage_access to use DTMLFile instead of HTMLFile.

dependency.

cvs.zope.org repository.

protected attributes can really hold a __roles__ list. Also, subclasses
often want to set up different protection for inherited attributes, in
which case either a copy of the DTMLFile is needed or the roles have to
be stored separately.

back in order.  The change to Management.py demonstrates the proper
way to fix the bug that today's patches were trying to address.