We seemed to create more confusion by omitting app.module (and main) in QS than we gained in simplicity of QS
Every other example requires these files.
This PR restores them to QS _but doesn't talk about them_ in QS, leaving _that_ to the Setup guide.
Contributes to #2407
- Dropped the “2” in “Angular 2” and “angular2_*” where appropriate.
- Did a partial sync of `_cache/guide/pipes.jade`
- In quickstart, changed `Try changing the message to "Hello Angular
2!”` to `Try changing the message to "Hello Again Angular!”`.
Thomas Claudius Huber
frankfullstack
Ward Bell
Filipe Silva
Patrice Chalin
Foxandxss