feat(bootstrap): remove the need for explicit reflection setup in bootstrap code

BREAKING CHANGES:

Dart applications and TypeScript applications meant to transpile to Dart must now
import `package:angular2/bootstrap.dart` instead of `package:angular2/angular2.dart`
in their bootstrap code. `package:angular2/angular2.dart` no longer export the
bootstrap function. The transformer rewrites imports of `bootstrap.dart` and calls
to `bootstrap` to `bootstrap_static.dart` and `bootstrapStatic` respectively.

modules/angular2/angular2_exports.ts

@@ -0,0 +1,43 @@
+export * from 'angular2/annotations';
+export * from 'angular2/core';
+
+export {
+  DehydratedException,
+  ExpressionChangedAfterItHasBeenChecked,
+  ChangeDetectionError,
+
+  ON_PUSH,
+  DEFAULT,
+
+  ChangeDetectorRef,
+
+  Pipes,
+  WrappedValue,
+  Pipe,
+  PipeFactory,
+  NullPipe,
+  NullPipeFactory,
+  defaultPipes,
+  BasePipe,
+
+  Locals
+} from './change_detection';
+
+export * from './di';
+export * from './forms';
+export * from './directives';
+export * from './http';
+export {
+  RenderEventDispatcher,
+  Renderer,
+  RenderElementRef,
+  RenderViewRef,
+  RenderProtoViewRef,
+  RenderFragmentRef,
+  RenderViewWithFragments
+} from 'angular2/src/render/api';
+export {
+  DomRenderer,
+  DOCUMENT_TOKEN,
+  DOM_REFLECT_PROPERTIES_AS_ATTRIBUTES
+} from 'angular2/src/render/dom/dom_renderer';