title: added custom key to info.plist, when I access from playground in Swift, it is nil
body: <p>Using Xcode 7.2 (on Yosemite), I can't seem to access  custom key from my info.plist from a playground:</p>
  
  <pre><code>import UIKit
  var str = "Hello, playground"
  let app_id = NSBundle.mainBundle().infoDictionary?["MyAppID"] as? String
  </code></pre>
  
  <p>Using the above code, app_id is nil.  I expected it to be the String "TEST"</p>
  
  <p>I included it in my info.plist like this:</p>
  
  <p><a href="https://i.stack.imgur.com/jTOJt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jTOJt.png" alt="enter image description here"></a></p>
  
  <p>Is there some limitation to playgrounds that I haven't read about?</p>
  
  <p>If I print all of the keys, my custom key is missing:</p>
  
  <pre><code>let dict = NSBundle.mainBundle().infoDictionary!
  for k in dict.keys {
    print("\(k)")
  }
  </code></pre>
  
  <p>prints the following:</p>
  
  <pre><code>DTSDKName
  CFBundleIdentifier
  CFBundleSupportedPlatforms
  CFBundleInfoDictionaryVersion
  LSRequiresIPhoneOS
  CFBundleNumericVersion
  DTPlatformName
  CFBundleShortVersionString
  CFBundleVersion
  UIViewControllerBasedStatusBarAppearance
  UIRequiredDeviceCapabilities
  UIStatusBarHidden
  CFBundlePackageType
  UIDeviceFamily
  CFBundleExecutable
  CFBundleInfoPlistURL
  LSBackgroundOnly
  CFBundleName
  CFBundleDevelopmentRegion
  </code></pre>
  
  <p>If I look at the Bundle name, like this: </p>
  
  <pre><code>let name = NSBundle.mainBundle().objectForInfoDictionaryKey("CFBundleName") as? String
  </code></pre>
  
  <p>I see the name of my playground, not the name of the workspace.  Can I get at the info.plist for the project?</p>