feat(view): implemented loading component next to existing location

modules/angular2/src/facade/collection.es6

@@ -129,6 +129,9 @@ export class ListWrapper {
   static filter(array, pred:Function) {
     return array.filter(pred);
   }
+  static indexOf(array, value, startIndex = -1) {
+    return array.indexOf(value, startIndex);
+  }
   static any(list:List, pred:Function) {
     for (var i = 0 ; i < list.length; ++i) {
       if (pred(list[i])) return true;

modules/angular2/src/facade/collection.ts

@@ -114,6 +114,9 @@ export class ListWrapper {
     }
     return null;
   }
+  static indexOf(array: List<any>, value, startIndex = -1) {
+    return array.indexOf(value, startIndex);
+  }
   static reduce<T>(list: List<T>,
                    fn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T,
                    init: T) {