title: Displaying time in AM/PM format with Angular grid
body: <p>How would I format an Angular grid that is receiving entities that have a date time property called startTime and endTime to show time in an AM/PM format?  Right now I am using:</p>
  
  <pre><code>{ field: 'StartTime', displayName: 'Start Time', cellFilter: 'date:\'hh:mm tt\''},
  { field: 'EndTime', displayName: 'End Time', cellFilter: 'date:\'hh:mm tt\''},
  </code></pre>
  
  <p>and obviously the 'tt' is showing instead of AM or PM.  Has anyone done AM/PM in an Angular ngGrid before?</p>