1. Added add_portlet/remove_portlet calls that accept portal_id as a param,
so that we can call this code from within the applet itself (e.g. add_user_to_community)
and be called directly so that we can create portal templates.
2. Infrastructure for applet cloning
3. New portal types system in dotlrn which replaces dummy_comm_p
4. Minor fixes to portal configuration, dotlrn-static
5. renamed add_element_or_append_id and remove_element_or_remove_id to
add_element_parameters and remove_element_parameters respectively
