update coalesce-find-requests code sample to django-rest-framework >=3.0 (#209)
update coalesce-find-requests code sample to django-rest-framework >=3.0 (#209)

Avoid "NotImplementedError: `request.QUERY_PARAMS` has been deprecated in favor of `request.query_params` since version 3.0, and has been fully removed as of version 3.2." when c&p'ing `CoalesceFilterBackend`.
dustinfarris/ember-django-adapter,dustinfarris/ember-django-adapter