Update examples readme with more details

This is a very small thing, but the examples README could have a little bit more detail. It's probably the first thing people will try, so it's nice to make it bullet proof.

**Disclaimer**
The first time I tried to run the tests Jest wasn't installed and I got a predictable "Q is not avaliable error message". It was easy to see what was going on, but would have probably been avoided if the first step were "Install Jest".