title: selection color for a UITableViewCell
body: <p>If I have a custom <code>UITableViewCell</code> that doesn't use the <code>textLabel</code> built in to the cell but instead does its own drawing, how can I change the appearance of the <code>contentView</code> on selection, like it does automatically for the default text (customizable by setting the <code>selectedTextColor:</code>)?</p>
  
  <p>If I change <code>tableView:willSelectRowAtIndexPath:</code>, then it only updates after the blue selection background is up, but not while it's animating, like I want.</p>