docs: def get_urls(self):
          """ Extend the admin urls for the CompetitionEntryAdmin model
              to be able to invoke a CSV export view  on the admin model """
          urls = super(CompetitionEntryAdmin, self).get_urls()
          csv_urls = patterns('',
              url(
                  r'^exportcsv/$',
                  self.admin_site.admin_view(self.csv_export),
                  name='competition-csv-export'
              )
          )
          return csv_urls + urls