Changes to support Facebook SDK 3.2 for iOS
Updates for iOS SDK 3.2. Moved to modern Objective-C patterns. Updated to latest Cordova methods for setting results. Updated JS SDK snapshot for cleaner error messages.
Update version to 2.5
Merge branch 'cordova-2.5-facebook-ios-3.2' of https://github.com/phonegap/phonegap-facebook-plugin
changed error handling for login and logout to be able to react on errors in UI as well