- display more columns in the listbox of the module
- allow the delete action in draft state
- add a constraint so that it is now forbidden to create two (or more)
inventories for the same date, same resource, same variation,
same node.
- the xml format has changed partially

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@14725 20353a03-c40f-0410-a6d1-a30d3c3de9de