Refactor into Laravel package.

Hey mate,

I think this command is really nifty. I've refactored it so it can be registered as a Laravel package (through it's service provider). I hope you like it. You could then just put it up on Packagist so we can install it via composer.

I used `JeffreyWay\RoutesCommand` as the namespace, let me know if you'd like to change this.