Update quby, add started_at field

Closes #5

LGTM given by: @jornvandebeek

Squashed commit of the following:

commit 825c4e35eccdecffc5da72b33dbe283aeba628f1
Author: Marten Veldthuis <marten@veldthuis.com>
Date:   Mon Sep 29 15:53:34 2014 +0200

    Update quby, add started_at field