title: Zurb Foundation: margin-top for class row doesn't work
body: <p>I have two rows stacked and want the second to have a margin-top of 50px. But when I add a class "extramargin" for the second DIV and add margin-top:50px; it doesn't have any effect. When I put it in my HTML  it works.</p>
  
  <p>Anybody here who knows how to add this extra spacing between those two rows?</p>