Update changelog and clean up code

testproj/articles/serializers.py

@@ -15,7 +15,7 @@ class ArticleSerializer(serializers.ModelSerializer):
         model = Article
         fields = ('title', 'body', 'slug', 'date_created', 'date_modified',
                   'references', 'uuid', 'cover', 'cover_name')
-        read_only_fields = ('date_created', 'date_modified', 'cover')
+        read_only_fields = ('date_created', 'date_modified')
         lookup_field = 'slug'
         extra_kwargs = {'body': {'help_text': 'body serializer help_text'}}