code: function(props) {
        var serialisedProps = [], key;
        if (typeof props != string) {
          for (key in props) {
            serialisedProps.push(cssstyle(key) + ':' + props[key]);
          }
          serialisedProps = serialisedProps.join(';');
        } else {
          serialisedProps = props;
        }
        return serialisedProps;
      }
docs: serialize the properties into a string for emile