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/benchmarks/src/di/di_benchmark.ts

@@ -14,6 +14,7 @@ export function main() {
   BrowserDomAdapter.makeCurrent();
   var iterations = getIntParameter('iterations');
 
+  // This benchmark does not use bootstrap and needs to create a reflector
   setupReflector();
   var bindings = [A, B, C, D, E];
   var injector = Injector.resolveAndCreate(bindings);