title: Joda time round to days
body: <p>Basically what I need is round any date to days. For example:
  2014-01-01 14:00:00 should be converted to 2014-01-01. </p>
  
  <p>I was trying to achieve it using <code>DateTimeFormatter</code> but was not able to find a method which would return me an actual joda <code>object</code> but not a String. </p>