closes#1538
This is a major reorganization of the Upgrade guide.
* Compatible with the new version of the AngularJS 1 PhoneCat
tutorial.
* No longer switching Angular 1 code to SystemJS for PhoneCat,
to allow beginning Angular 2 migration with fewer preparation
steps. SystemJS switch now happens simultaneously with upgrade.
(This is based on input from @joeeames)
* Testing moved to an appendix to make the main narrative
shorter and easier to follow.
* Use component methods to do phone filtering and ordering
instead of introducing pipes to replace filterFilter and orderByFilter.
* Cover issue with camelCase inputs on downgraded components.
For authors:
* All examples now fully integrated with the example boilerplate. Uses the
same Angular 2 version as all other guides. E2E tests are executed
along with all the others.
* Reduced number of PhoneCat versions from five to three.
* Each directory has a README explaining how to run it and what might
be peculiar about it.
Closesangular/angular#8622
Relates to angular/angular.js#14416
Relates to angular/angular-phonecat#326
