chore(build): migrated di to TypeScript

modules/angular2/src/di/decorators.ts

@@ -0,0 +1,14 @@
+import {
+  InjectAnnotation,
+  InjectPromiseAnnotation,
+  InjectLazyAnnotation,
+  OptionalAnnotation,
+  InjectableAnnotation
+} from './annotations';
+import {makeDecorator, makeParamDecorator} from '../util/decorators';
+
+export var Inject = makeParamDecorator(InjectAnnotation);
+export var InjectPromise = makeParamDecorator(InjectPromiseAnnotation);
+export var InjectLazy = makeParamDecorator(InjectLazyAnnotation);
+export var Optional = makeParamDecorator(OptionalAnnotation);
+export var Injectable = makeDecorator(InjectableAnnotation);