title: Create custom UITableView separator line
body: <p>I would like to create a separator line like this one:</p>
  
  <p><img src="https://i.stack.imgur.com/QadMs.png" alt="enter image description here"></p>
  
  <p>Any idea about how to implement it?
  I tried getting an image of the line and using <code>UIAppearance</code> proxy objects:</p>
  
  <pre><code>[[UITableView appearanceWhenContainedIn:[MyController class], nil] setSeparatorColor:
  [UIColor colorWithPatternImage:[UIImage imageNamed:@"line.png"]]];
  [[UITableView appearanceWhenContainedIn:[MyController class], nil] setSeparatorStyle:UITableViewCellSeparatorStyleSingleLine];
  </code></pre>
  
  <p>but,somehow, only the black line gets rendered.</p>