title: How to get a date in milliseconds with moment.js
body: <p>I'm trying to get a date in milliseconds with moment.js. The problem is, in their docs in unix timestamp section they have only unix timestampt to momentjs format. How can I get a unix timestamp in milliseconds from date?
  Eg: <code>moment.unix(2010-01-01T05:06:07) =&gt; 1262318767000</code></p>