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/src/test_lib/test_injector.ts

@@ -84,7 +84,7 @@ function _getAppBindings() {
 
   // The document is only available in browser environment
   try {
-    appDoc = DOM.defaultDoc();
+    appDoc = DOM.createHtmlDocument();
   } catch (e) {
     appDoc = null;
   }