Merge branch '72-django-two-dot-oh' into '2.1-dev'

Resolve "Adopt Django 2.0"

See merge request !37
2 jobs for 2.1-dev in 1 minute and 25 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed whats-open-py3.5 #4073

00:01:25

passed whats-open-py3.6 #4074

00:01:23