title: Convert Joda LocalDateTime to Unix timestamp
body: <p>How do I convert a <code>org.joda.time.LocalDateTime</code> to an Unix timestamp, given that local time is in UTC timezone?</p>
  
  <p>Example:</p>
  
  <p><code>new LocalDateTime(2015, 10, 02, 11, 31, 40)</code> > <code>1443785500</code>.</p>