title: Can't ignore UserInterfaceState.xcuserstate
body: <p>I'm using Git for Xcode 4 project version control.  I've explicitly added <code>ProjectFolder.xcodeproj/project.xcworkspace/xcuserdata/myUserName.xcuserdatad/UserInterfaceState.xcuserstate</code> to <code>.gitignore</code>, but Git it won't ignore it.  Any ideas why this is so?</p>