There are some other issues for users trying to follow along. I hit my next snag from moment.js not being imported, and not having the filters domain, amFromUnix and amTimeAgo not being found. I see you addressed these points later on in your post notes, kind of as an "excercise left for the user".
After that point, I just read the article and stopped trying to follow along. Perhaps it wasn't your intent to make a step-by-step type article, but I'm just sharing the experience I had trying to go along one step at a time. I appreciated the article, especially because right now we're starved for Angular 2 content, and there's not a lot out there yet.