Make sure JSON output are byte strings.
Make sure JSON output are byte strings.

This works around https://code.djangoproject.com/ticket/24240 which
otherwise dies when trying to cope with a StreamingHttpResponse
containing unicode strings.

opencorato/mapit,Code4SA/mapit,chris48s/mapit,opencorato/mapit,chris48s/mapit,Code4SA/mapit,Code4SA/mapit,chris48s/mapit,opencorato/mapit