Merge branch 'upgrade_to_django_3.1' into 'develop'

README.md

VIPSWeb/settings.py

VIPSWeb/templates/base.html

VIPSWeb/templates/base_with_date_picker.html

VIPSWeb/templates/index.html

VIPSWeb/templates/index_old.html

VIPSWeb/templatetags/template_helper.py

VIPSWeb/urls.py

VIPSWeb/views.py

VIPSWeb/wsgi.py

applefruitmoth/templates/applefruitmoth/index.html

applefruitmoth/urls.py

calculators/templates/calculators/eil.html

calculators/templates/calculators/index.html

calculators/urls.py

...els/templates/cerealblotchmodels/barleynetblotchform.html

cerealblotchmodels/templates/cerealblotchmodels/index.html

...mplates/cerealblotchmodels/septoriahumiditymodelform.html

...els/templates/cerealblotchmodels/wheatleafblotchform.html

cerealblotchmodels/urls.py