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20130719 (Friday, 19 July 2013)
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Discovered an old bug: the csv view failed for tables which contained 
at least one :class:`DisplayField <lino.core.fields.DisplayField>`.
The following snippet reproduced this bug:

>>> import os
>>> os.environ['DJANGO_SETTINGS_MODULE'] = 'lino_welfare.settings.test'
>>> from pprint import pprint
>>> from django.test import Client
>>> from lino.api.shell import *
>>> settings.SITE.startup()
>>> client = Client()
>>> # url = 'https://welfare-demo.lino-framework.org/api/newcomers/NewClients?fmt=csv'
>>> url = '/api/newcomers/NewClients?fmt=csv'
>>> res = client.get(url,REMOTE_USER='rolf')
>>> pprint(res.status_code)
200
>>> pprint(res.content[:24])
'name_column,client_state'


Wrote a new script :mod:`lino.utils.xmlgen.sepa.validate` 
which I used for developing a template for TIM to render 
a payment order as SEPA XML.