20120906
========

:mod:`lino_welfare`. Added new models 
:class:`Coaching <lino_welfare.modlib.pcsw.models.Coaching>` 
:class:`Third <lino_welfare.modlib.pcsw.models.ClientContact>`.

Virtual fields declared on the model must have
been attached before calling Model.site_setup(),
e.g. because pcsw.Person.site_setup()
declares `is_client` as imported field.


New class :class:`lino.modlib.contats.models.CompanyContact` 
comes from `ContractBase` of `lino_welfare.modlib.isip`.

Added `when` and `interval` parameters to 
:func:`lino.utils.log.configure` for creating 
a timed rotating logger.