* added tab in order to see task reports
on project
* added 3 reports :
- one to see tasks
- one for task or tasks reports if the
task is validated
- one to see the difference between
what was planned at the beginning
and what was done in reality

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19656 20353a03-c40f-0410-a6d1-a30d3c3de9de