Prepare 2.0.4 release.
Prepare 2.0.4 release.

marcgibbons/django-rest-swagger,marcgibbons/django-rest-swagger,pombredanne/django-rest-swagger,marcgibbons/django-rest-swagger,marcgibbons/django-rest-swagger,pombredanne/django-rest-swagger,pombredanne/django-rest-swagger,pombredanne/django-rest-swagger