feat(platform/browser): use bundler for bootstrap

BREAKING CHANGES:

You have to bootstrap your app via root component like Angular 2 does.
This is because we use now tree resolving algorithm for building Angular.module

before:
```typescript
import {bootstrap} from 'ng-metadata/platform';
import {AppModule} from './index'; // string

bootstrap(AppModule);
```

after:
```typescript
import {bootstrap} from 'ng-metadata/platform';
import {LegacyModule} from './index'; // string
import {AppComponent} from './index'; // class with @component decorator

bootstrap(AppComponent, [LegacyModule]);
```

src/core/util.ts

@@ -1 +1,2 @@
 export * from './util/decorators';
+export { bundle } from './util/bundler';

src/platform/browser.ts

@@ -1,22 +1,24 @@
 import { assertionsEnabled } from '../facade/lang';
+import { bundle } from '../core/util/bundler';
 
 export * from './title';
 export type AppRoot = string | Element | Document;
 
 /**
  * bootstrap angular app
- * @param {string}  ngModuleName
- * @param {string | Element | Document} [element=document]
- * @param {boolean} [strictDi=true]
+ * @param {Type}  rootComponent
+ * @param {Array<any>}  providers
  */
 export function bootstrap(
-  ngModuleName: string,
-  {element=document,strictDi=true}: {
-    element?: AppRoot,
-    strictDi?: boolean
-  }={}
+  rootComponent: Type,
+  providers: any[]
 ) {
 
+  const ngModule = bundle( rootComponent, providers );
+  const ngModuleName = ngModule.name;
+  const strictDi = true;
+  const element = document;
+
   if ( assertionsEnabled() ) {
     console.info(
       'Angular is running in the development mode. Call enableProdMode() to enable the production mode.'