Add missing "parent" property to angular-ui-router state configuration object

As documented here: http://angular-ui.github.io/ui-router/site/#/api/ui.router.state.$stateProvider

angular-ui-router/angular-ui-router-tests.ts

@@ -64,7 +64,16 @@ myApp.config((
 		controller: function ($scope: MyAppScope) {
           $scope.things = ["A", "Set", "Of", "Things"];
         }
-      }).state('index', {
+      })
+    .state('list', {
+      parent: 'state3',
+      url: "/list",
+      templateUrl: "partials/state3.list.html",
+      controller: function ($scope: MyAppScope) {
+      $scope.things = ["A", "Set", "Of", "Things"];
+      }
+    })
+    .state('index', {
       url: "",
       views: {
         "viewA": { template: "index.viewA" },

angular-ui-router/angular-ui-router.d.ts

@@ -30,6 +30,13 @@ declare module angular.ui {
          * Function (injectable), returns the actual controller function or string.
          */
         controllerProvider?: Function;
+        
+        /**
+         * Specifies the parent state of this state
+         */
+        parent?: string | IState
+        
+        
         resolve?: {};
         /**
          * A url with optional parameters. When a state is navigated or transitioned to, the $stateParams service will be populated with any parameters that were passed.