Update member count

gistfile1.txt

function updateMemberCountWhenAdded(notification)
{
  var notif = new Notification(notification);
  notif.addedMemberToCard();
  updateMemberCountOnCard(notif.card());
}

function updateMemberCountWhenRemoved(notification)
{
  var notif = new Notification(notification);
  notif.removedMemberFromCard();
  updateMemberCountOnCard(notif.card());
}

function updateMemberCountOnCard(card)
{
  if(card.currentList().name() == "Signup sheets")
  {
    card.setName("Signed up: "+card.members().length());
  }
}