title: Changing XCode project name causes fatal error
body: <p>I am trying to rename my XCode 4 project. I have tried several different ways, but nothing works. I always get the following error:</p>
  
  <pre><code>fatal: source directory is empty,
  source=Desktop/Folder/OLD PROJECT NAME.xcodeproj,
  destination=Desktop/Folder/NEW PROJECT NAME.xcodeproj
  </code></pre>
  
  <p>What's causing this error, and how can I resolve it?</p>