UE4 IOS FB Integration

critical steps required for ue4 integration with fb sdk (as a check list)

• get the ue4 source
• get facebook sdk
• add #import <FacebookSDK.h>
• Important issue, that I missed (the facebook sdk will not call completion handler):
  http://stackoverflow.com/questions/16730408/facebook-ios-sdk-not-calling-completion-handler-when-authorized-app
• some (or most of) FacebookSDK documents are deprecated... but some seems to work fine.
  https://developers.facebook.com/docs/ios/share?locale=en_GB
• ensure that Core.build.cs, and [yourproject].build.cs includes the Facebook SDK framework I used:

• PublicAdditionalLibraries.Add("[FacebookSDK.framework's path]/Versions/A/FacebookSDK");

• PublicSystemIncludePaths.Add("[FacebookSDK.framework's path]/Versions/A/Headers");

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