Upgraded to be inline with API changes of SVN 13639. This is mostly related to the hasBaseData function and to the renaming of convertToBase into convertToBaseFormat. It also contains initial display with iframes of content, as well as bug fixes in workflows (ex. state_change['object']) instead of state_change.object.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@13663 20353a03-c40f-0410-a6d1-a30d3c3de9de