Using an object to specify routes instead of JSON

(h/t @des-des)

Might be nice to specify the standard routes (e.g `login`, `signup`, etc) with a handler object instead of in the JSON configuration file.

Fora usage example:

``` javascript
server.route({
method: 'GET',
path: '/login',
handler: {
form: {
email: { label: 'E-mail: ' },
password: { label: 'Password', confirm: true }
}
}
});
```

This can be implemented using the [`server.handler`](http://hapijs.com/api#serverhandlername-method) method.

This can then be specified inside the plugin instead of being part of the JSON, meaning we impose certain routes (which is fine; the user has required abase because they want a user system, right?), and the user has less JSON to worry about.