feat(decorators): adds decorator versions of DI annotations.

In 'angular2/di' the symbol:
- Inject is a decorator
- InjectAnnotation is an annotation

Internally one an get a hold of annotations without *Annotations appened
(to make ts2dart work without workarounds) by importing from
'angular2/src/di/annotations_impl' instead of 'angular2/di'. This is
needed only for users that transpile through TS and through ts2dart.

modules/angular2/test/core/application_spec.js

@@ -16,7 +16,8 @@ import {Component, Directive} from 'angular2/src/core/annotations_impl/annotatio
 import {DOM} from 'angular2/src/dom/dom_adapter';
 import {ListWrapper} from 'angular2/src/facade/collection';
 import {PromiseWrapper} from 'angular2/src/facade/async';
-import {bind, Inject} from 'angular2/di';
+import {bind} from 'angular2/di';
+import {Inject} from 'angular2/src/di/annotations_impl';
 import {View} from 'angular2/src/core/annotations_impl/view';
 import {LifeCycle} from 'angular2/src/core/life_cycle/life_cycle';
 import {Testability, TestabilityRegistry} from 'angular2/src/core/testability/testability';

modules/angular2/test/core/compiler/element_injector_spec.js

@@ -6,7 +6,8 @@ import {ProtoElementInjector, PreBuiltObjects, DirectiveBinding, TreeNode}
 import {Parent, Ancestor} from 'angular2/src/core/annotations_impl/visibility';
 import {Attribute, Query} from 'angular2/src/core/annotations_impl/di';
 import {Directive, onDestroy} from 'angular2/src/core/annotations_impl/annotations';
-import {Optional, Injector, Inject, bind} from 'angular2/di';
+import {bind, Injector} from 'angular2/di';
+import {Optional, Inject} from 'angular2/src/di/annotations_impl';
 import {AppProtoView, AppView} from 'angular2/src/core/compiler/view';
 import {ViewContainerRef} from 'angular2/src/core/compiler/view_container_ref';
 import {ProtoViewRef} from 'angular2/src/core/compiler/view_ref';

modules/angular2/test/di/async_spec.js

@@ -9,7 +9,8 @@ import {
   it,
   xit,
 } from 'angular2/test_lib';
-import {Injector, Inject, InjectPromise, bind, Key} from 'angular2/di';
+import {Injector, bind, Key} from 'angular2/di';
+import {Inject, InjectPromise} from 'angular2/src/di/annotations_impl';
 import {Promise, PromiseWrapper} from 'angular2/src/facade/async';
 
 class UserList {

modules/angular2/test/di/injector_spec.js

@@ -1,6 +1,8 @@
 import {isBlank, BaseException} from 'angular2/src/facade/lang';
 import {describe, ddescribe, it, iit, expect, beforeEach} from 'angular2/test_lib';
-import {Injector, Inject, InjectLazy, Optional, bind, ResolvedBinding} from 'angular2/di';
+import {Injector, bind, ResolvedBinding} from 'angular2/di';
+import {Optional, Inject, InjectLazy} from 'angular2/src/di/annotations_impl';
+
 
 class Engine {
 }

modules/angular2/test/forms/integration_spec.js

@@ -14,7 +14,7 @@ import {
 } from 'angular2/test_lib';
 import {DOM} from 'angular2/src/dom/dom_adapter';
 
-import {Inject} from 'angular2/di';
+import {Inject} from 'angular2/src/di/annotations_impl';
 
 import {Component, Directive} from 'angular2/src/core/annotations_impl/annotations';
 import {View} from 'angular2/src/core/annotations_impl/view';

modules/angular2/test/transform/integration/all_tests.dart

@@ -44,8 +44,8 @@ void allTests() {
     'angular2|lib/src/reflection/reflection_capabilities.dart':
         '../common/reflection_capabilities.dart',
     'angular2|lib/di.dart': '../../../lib/di.dart',
-    'angular2|lib/src/di/annotations.dart':
-        '../../../lib/src/di/annotations.dart',
+    'angular2|lib/src/di/annotations_impl.dart':
+        '../../../lib/src/di/annotations_impl.dart',
   };
 
   var tests = [