title: Can you create per-user project settings in Xcode?
body: <p>I'm collaborating on an iPhone application, with the project files (<code>.xcodeproj</code> directory) checked into source control.  One important setting is the "Code Signing Identity", which specifies the certificates to use to sign the application in order that it can run on the iPhone.</p>
  
  <p>Each developer on the project has his own Code Signing Identity, so whenever anyone makes a change to the project, his Code Signing Identity gets saved into the project settings, and then everyone else inherits that change.  They then have to change that to their CSI before they can continue.</p>
  
  <p>Is there a way to have the Code Signing Identity saved in some local per-user project file that doesn't get checked into source control?</p>