feat(templates): new templates capabilities (#862)

app/directives/template-widget.js

@@ -0,0 +1,13 @@
+angular
+.module('portainer')
+.directive('rdTemplateWidget', function rdWidget() {
+  var directive = {
+    scope: {
+      'ngModel': '='
+    },
+    transclude: true,
+    template: '<div class="widget template-widget" id="template-widget" ng-transclude></div>',
+    restrict: 'EA'
+  };
+  return directive;
+});