Convert Context object to dict
Convert Context object to dict

Prevents warning about
https://docs.djangoproject.com/en/2.0/releases/1.11/#django-template-backends-django-template-render-prohibits-non-dict-context
and makes transitioning to 1.11 easier.

Refs #321

DemocracyClub/yournextrepresentative,DemocracyClub/yournextrepresentative,DemocracyClub/yournextrepresentative