title: Sort Array of Dictionaries by NSDate
body: <p>I have an array of dictionaries. Within each dictionary, there is a a key <code>dateOfInfo</code> (an <code>NSDate</code>) and several other things. I want to sort the array by each dictionaries <code>dateOfInfo</code> with the most recent being the first result. </p>
  
  <p>How can I do this?</p>