Loading stuff asynchronously using the CLI

[filipesilva]

Heya, we chatted at ngconf and I just wanted to leave here to leave here some instructions on how you can do it. It should work for JSON well.

• https://webpack.js.org/guides/code-splitting-import/
• https://github.com/angular/angular-cli/blob/master/tests/e2e/tests/misc/lazy-module.ts#L33