New power of Angular Router

The talk about Angular2 new Router based on (V3.1.0).
Including:
1. Why need router?
2. Router Basic
3. Lazy loading
4. Preload lazy loaded module
5. Guards
6. Auxiliary router (named router)
7. Pitfalls

https://docs.google.com/presentation/d/1-xRQR6NaK9YQE4yr8V95vasIFX8s8ha-VPP3i1PvhOk/edit?usp=sharing