Read Me About GKAuthentication
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GKAuthentication is a sample application that shows how to correctly 
perform GameKit Authentication. This code is completely copy and paste-able.


IMPORTANT: When adding support for Game Center to an application, it is not
enough to simply add the necessary code to your application.  You also
need to configure your app in iTunes Connect to match your desired
configuration.  

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BUILD REQUIREMENTS:

This project was built with Xcode 3.2.4 and iOS SDK 4.2

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RUNTIME REQUIREMENTS:

The project requires iOS 4.2 and a GameCenter account to run.

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PACKAGING LIST:
- ReadMe.txt -- This file.
- GKAuthentication.xcodeproj --  Xcode project for this sample. 
- Resources -- The project nib, images, and so on.
- Classes/GKAuthenticationAppDelegate.h -- Declaration of the best 
    practices
- Classes/GKAuthenticationAppDelegate.m -- Contains the best practices of 
    adding authentication to a project. 
- main.m -- The main function of this sample.

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CHANGES FROM PREVIOUS VERSIONS:

1.0: (Feb 2011) First shipping version.

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Copyright (C) 2011 Apple Inc. All rights reserved.