code: def status(self, request, project, pk=None):
          
          try:
              push = Push.objects.get(id=pk)
          except Push.DoesNotExist:
              return Response("No push with id: {0}".format(pk),
                              status=HTTP_404_NOT_FOUND)
          return Response(push.get_status())
docs: Return a count of the jobs belonging to this push
          grouped by job status.