docs: def add_response_headers(h):
      """
      Add HTTP-headers to response.
      Example:
          @add_response_headers({'Refresh': '10', 'X-Powered-By': 'Django'})
          def view(request):
              ....
      """
      def headers_wrapper(fun):
          def wrapped_function(*args, **kwargs):
              response = fun(*args, **kwargs)
              for k, v in h.iteritems():
                  response[k] = v
              return response
          return wrapped_function
      return headers_wrapper