code: function compileTemplate () {
      var template = $attrs.$mdTabsTemplate,
          element  = angular.element($element[0].querySelector('md-tab-data'));
  
      element.html(template);
      $compile(element.contents())(ctrl.parent);
      delete $attrs.$mdTabsTemplate;
    }
docs: Compiles the template provided by the user.  This is passed as an attribute from the tabs
  directive's template function.