Add timesheet line fields:
- ``funding_wish`` to inform about if the user expects a payment
for the registered time.
- ``treated`` to keep track if the timesheet line funding wish has
been taken into account.
Task: JOI-13
Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>
Add a field in ``project.task`` to assign users to task. This
completes ``user_id`` field, that is then considered as the owner of
the task. Assignment becomes optional and can now target multiple
users.
Task: JOI-13
Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>
