Use DjangoJSONEncoder in the json_dumps template tag.
By using DjangoJSONEncoder, we can properly serialize a few extra types

that the default JSONEncoder does not handle the way that's typically

expected in a Django app, such as timestamps. This ensures that a

timestamp serialized using json_dumps will appear the same as a

timestamp serialized through a WebAPIResource.

Tested with a template in Review Board and saw that the timestamp in the template

matched that in the API.