Move getting title of a published in web ERP5 object in a separate script so other parts of ERP5 Web (KM) can reuse it.
Add note for further API  improvements (possible).

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@34087 20353a03-c40f-0410-a6d1-a30d3c3de9de