Could the counter and the counter spec be moved into its own repo?

[dfberry]

The counter reducer and its spec (which are in this repo) would be a lot more helpful if they were in one repo all by themselves. There are so many working parts to just get the counter test to run for a first-timer to ng2 (ng2, jasmine, karma, rxjs, ngrx, module loader, etc...) that it would be great to have this one small repo where a quick example had both the source and the test.