* build: tsconfig for editor warnings
Currently when using a code editor that uses the TypeScript language service (Webstorm / VS Code / Atom / Sublime) there will be TypeScript errors in the `.spec` files.
This is because the editor finds the `tsconfig.json` file that doesn't match the spec files. Therefore it complains about the `experimentalDecorators`.
In `angular/angular` there is a global `tsconfig` file that matches everything and is therefore fixing the editor warnings. This file is also used to compile all `.spec` files for the whole project.
We can add such a `tsconfig.json` file as well, and in the future we can use it for compiling the specs as well.
* Add docs for tsconfig files
* test: use proper typings in e2e app
* Switches to use the typings from @types for the e2e app.
* Adds all of the necessary imports and fixes type issues.
Relates to #2025.
Fixes#1531.
* Add missing typings to slide toggle.
* Fix another typo.
Paul Gschwendtner