feat(view_pool): adds a view pool of dehydrated views per protoview.

modules/angular2/src/facade/collection.dart

@@ -110,6 +110,7 @@ class ListWrapper {
       list.remove(items[i]);
     }
   }
+  static removeLast(List list) => list.removeLast();
   static bool remove(List list, item) => list.remove(item);
   static void clear(List l) {
     l.clear();

modules/angular2/src/facade/collection.es6

@@ -149,6 +149,9 @@ export class ListWrapper {
       list.splice(index, 1);
     }
   }
+  static removeLast(list:List) {
+    return list.pop();
+  }
   static remove(list, el): boolean {
     var index = list.indexOf(el);
     if (index > -1) {