Add format flag to lucky routes for outputting alternate formats

[jwoertink]

We currently have some nice output when you run lucky routes

I've been working with front end APIs a lot lately, and just had the idea of what if you could do something like lucky routes --format=json then have a json file that maps all of these routes. Drop that file in to your SPA and somehow hook it up in a way that if a route changes on the backend, it would be updated on the frontend.

The use case could be for whatever really, but just having an alternate format option might be nice.