Feature/players api

@jarsbe,

I've added a very simple Player API to the main Latter codebase - it just adds a route with a URL of:

``` bash
/api/v1/players.json
```

---

This route uses token authentication via the URL - you authenticate by passing in `auth_token`. Right now there's no way to generate your own auth token in the profile page, but I'll probably add this soon.