title: change date format in vaadin-grid
body: <p>I'm pulling a Date from a database into the vaadin-grid(vaadin-table) with angular2. All I need is MM/DD/YYYY format. The date filters is not working in the vaadin-grid like {{dateOfBirth | date:'dd/mm/yyyy'}}.</p>
  
  <p>Thank you! Examples make the most sense to me as I'm very new to vaadin.</p>