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.ts

@@ -1,6 +1,12 @@
 /**
  * The `angular2` is the single place to import all of the individual types.
  */
+export {commonBootstrap as bootstrap} from 'angular2/src/core/application_common';
+
+// TODO(someone familiar with systemjs): the exports below are copied from
+// angular2_exports.ts. Re-exporting from angular2_exports.ts causes systemjs
+// to resolve imports very very very slowly. See also a similar notice in
+// bootstrap.ts
 export * from 'angular2/annotations';
 export * from 'angular2/core';
 
@@ -28,34 +34,7 @@ export {
 
 export * from './di';
 export * from './forms';
-
 export * from './directives';
-
-export {
-  AbstractControl,
-  AbstractControlDirective,
-  Control,
-  ControlGroup,
-  ControlArray,
-  NgControlName,
-  NgFormControl,
-  NgModel,
-  NgControl,
-  NgControlGroup,
-  NgFormModel,
-  NgForm,
-  ControlValueAccessor,
-  DefaultValueAccessor,
-  CheckboxControlValueAccessor,
-  SelectControlValueAccessor,
-  formDirectives,
-  Validators,
-  NgValidator,
-  NgRequiredValidator,
-  FormBuilder,
-  formInjectables
-} from './forms';
-
 export * from './http';
 export {
   RenderEventDispatcher,