Search can return up to 30 results (default to 10)

Excuse the big shrinkwrap changeset. The code change is [here](https://github.com/Financial-Times/next-dobi/blob/f160a83aa14720b753bbc1c7eb25f410b487d18a/server/app.js).

/cc @railsagainstignorance It takes about 700ms to return 30 results with node's asynchronous http fetching magic. I've left the default at 10, but when it's deployed you can add `?count=25` to the querystring to bring back more results.