Blocked by #4023 and #4025

Angular's typings files should match our bundles 1:1. See #3458 for more info about bundles.

• angular2.d.ts (includes core, http, router)
• core.d.ts
• http.d.ts
• router.d.ts
• testing.d.ts
• web_worker.d.ts
• web_worker_ui.d.ts

Also make sure the typings get added to DefinitelyTyped, and get documented in our release process.