title: "supported external accessory protocols" and info.plist in xcode
body: <p>I read through Apple's EADemo project. I then attempted my own. But when I made my own, there's no place to put the supported protocol string. In Apple's EADemo project, if you look at the project info or plist, there's a spot called "Supported External Accessory Protocols".</p>
  
  <p>How can I get that field to appear in my project?</p>
  
  <p>Thanks!</p>