Update README with Example app instructions
Update README to fix internal links

The links from "How to Get Started" to the FAQ and the Example app instructions were broken
Update README to capitalize App
Update README per PR comments

1. Remove git submodule instructions
2. Move the "Running the Example App" instructions to right after "How to Get Started"

I noticed that you only need to run `rake install` once per computer, so I also prefixed that step with "If you haven't already"
Merge pull request #8 from MaxGabriel/master

Updates the README with instructions how to get the example app running