Converting to to Modern Objective-C Syntax.
Implementing lenientFileNameExtensions.
Converting to ARC.
Converting IBOutlet properties to ivars.
See: http://bou.io/IBOutletsIn2013.html
Updating XIB.
Updating project.
Project touched by Xcode 5.
Implementing “-additionalCleanUp” as an override point for subclasses which need to do cleanup.