Change operator choices to simple iterable
Change operator choices to simple iterable

Previously the returned iterable was made up of 2-tuples where [0] and
[1] were the same data.  Client JS has been updated to reflect the API
change.

pivotal-energy-solutions/django-appsearch,pivotal-energy-solutions/django-appsearch,pivotal-energy-solutions/django-appsearch,pivotal-energy-solutions/django-appsearch