title: Getting current unixtimestamp using Moment.js
body: <p>I want to get the Unix TimeStamp using Moment.js.
  I can find many functions which convert timestamp to date in moment.js.
  I know that I can easily get the unix timestamp by using the following JavaScript function: <code>Math.floor(new Date().getTime()/1000)</code>.</p>
  
  <p>But I want to use Moment.js to get the same result.
  Is there any direct function in moment.js to get the current timestamp?</p>