Use new forms allowing user to specify a start_date when executing "start" transition, and a stop_date when executing "stop" transition.
Add a script to set those values on document whose state is being modified.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@20349 20353a03-c40f-0410-a6d1-a30d3c3de9de