Update homepage example

There has been a lot of confusion caused by the homepage example. The example is outdated and doesn't work with the current ember version.

I know the example is not a quick-start guide, but we can at least put a working example, since some people are using it to build their first app.

I modified it with something that works.  All they need to do is paste the JS and template and they get something working.

Only missing thing is the required scripts which I don't mind adding to the template.

We can probably work on something better later on, but for now, let's at least have something that works.