title: Multiple cursors / highlight next instance of currently highlighted word
body: <p>In Sublime Text, it's easy to <a href="https://www.sublimetext.com/docs/2/multiple_selection_with_the_keyboard.html" rel="noreferrer">select the next instance of a word</a> by pressing <em>command + d</em> and also place multiple cursors by pressing <em>command &amp; clicking</em>. I know I'm not alone in saying this is an incredibly useful function in editors.</p>
  
  <p>I haven't had any luck in finding any key mappings or Alcatraz plugins for this, so I was interested to see if either there is a way to do this in xcode 5 which I might have missed or if there are plans to implement this in xcode 6?</p>
  
  <p>If there isn't, and any xcode developers see this, would love to see this as a feature and hear your opinions on it :)</p>