Cleaned redundant paths; removed wiki; removed redundant portal_types; removed predecessor base_cat (overlaps with erp5_project); completed content_type_registry; tidied up roles and actions in all types; implemented Graphic support.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@8811 20353a03-c40f-0410-a6d1-a30d3c3de9de