bootstrapper can now load either the Oracle or PostgreSQL acs-kerneldatamodel. It checks on-the-fly for which db is configured in the OpenNSDdatabase pools allocated to OpenACS. Only acs-kernel is correctly self-configured at this point.
initial import of acs kernel data-model ported to postgresql - implementation of tree queries completed for acs_object_types. Still need to finish tree queries for acs_privilege_hierarchy and rel_constraints tables.