message: content can be tagless
diff: @@ -4,6 +4,7 @@ import layout from '../templates/components/cardstack-content';
  export default Ember.Component.extend({
  layout,
  format: 'card',
  + tagName: '',
  id: Ember.computed('content', 'format', function() {
  return `${Ember.guidFor(this.get('content'))}/${this.get('format')}`;
  }),
  