Hopefully prepared everything for migration to Django 2.0

VIPSWeb/templatetags/template_helper.py

VIPSWeb/urls.py

applefruitmoth/urls.py

calculators/urls.py

cerealblotchmodels/urls.py

forecasts/urls.py

fusarium/urls.py

information/models.py

information/urls.py

information/views.py

mock/urls.py

observations/urls.py

organisms/urls.py

roughage/urls.py

security/urls.py

vips_messages/urls.py