RFC - New experimental conversion tool skeleton. WIll replace oood and portal_transforms with a single tool which handles both conversion and metadata. In Phase 1, uses a single tool which calls itself through XML-RPC. In Phase 2, will be splitted into a tool and WSGI service.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@29497 20353a03-c40f-0410-a6d1-a30d3c3de9de