title: how do I control output from angular-moment
body: <p>I am using <a href="https://github.com/urish/angular-moment" rel="nofollow">angular-moment</a> library. Essentially, I want to show the time difference in minutes between now and some time in the model. Ideally, the display must be dynamic; so the user doesn't need to refresh the page in order to see updates.</p>
  
  <p><code>&lt;span am-time-ago="message.time"&gt;&lt;/span&gt;</code> works and works dynamically. <strong>But</strong> it shows user-friendly messages "a few seconds ago, 2 minutes ago, etc. I need the actual value in minutes (30 means in 30 minutes, -120 means I am 2 hours late, etc.)</p>
  
  <p>Everything else, for example <code>moment(myJsonValue).diff(moment(), 'minutes')</code> is not dynamic. Is there a way to have both dynamic <strong>and</strong> numeric? </p>