* added accounting period module and validation workflow.
* added account validation workflow
* many improvement to reports
* (partially) move to Inventory API
* minor UI clean up

bump version to 1.0rc7


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@4760 20353a03-c40f-0410-a6d1-a30d3c3de9de