Changelog for official Angular schematics

[cyrilletuzi]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request

Area

- [ ] devkit
- [x] schematics

Desired functionality

To stay up to date, upgrading the CLI itself is not enough. We need to know the changes done in the official Angular schematics, for example to know when the dependencies are updated in package.json to know when it's safe to upgrade tools (like tslint, codelizer, etc.). There can also be changes in other files (for tests, polyfills and so on...).

And currently, we have to look at the git history of each file within this repo (which is now separate from the CLI, and some people may even not know about it).

So a CHANGELOG is really required, or at least, changes done here should be integrated in the CLI changelog.

Thanks.

[cyrilletuzi]

In the same idea, as an important part of the CLI is now done here, it would be nice to include contributors to this package in the special thanks of the CLI release.

@hansl