feat(transformers): directive aliases in Dart transformers (fix #1747)

modules/examples/src/order_management/index.ts

@@ -13,6 +13,8 @@ import {
   EventEmitter
 } from 'angular2/bootstrap';
 
+import {Injectable} from 'angular2/di';
+
 import {formDirectives} from 'angular2/forms';
 
 import {ListWrapper} from 'angular2/src/facade/collection';
@@ -44,6 +46,7 @@ class Order {
 // ---- services
 
 var _nextId = 1000;
+@Injectable()
 class DataService {
   orderItems: OrderItem[];
   orders: Order[];

modules/examples/src/person_management/index.ts

@@ -12,6 +12,8 @@ import {
   Binding
 } from 'angular2/bootstrap';
 
+import {Injectable} from 'angular2/di';
+
 import {formDirectives} from 'angular2/forms';
 
 import {RegExpWrapper, print, isPresent, CONST_EXPR} from 'angular2/src/facade/lang';
@@ -50,6 +52,7 @@ class Person {
 
 // ---- services
 
+@Injectable()
 class DataService {
   currentPerson: Person;
   persons: Person[];