Outdated Core Data Concurrency Guide

[NSCSKirk]

The Apple Core Data Concurrency Guide (https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/CoreData/Articles/cdConcurrency.html) linked to in issue 2 under common background practices (http://www.objc.io/issue-2/common-background-practices.html) is considered out of date by Apple with the following notice at the top of the page:

"Important: Best practices for concurrency with Core Data have changed dramatically since this document was written; please note that this chapter does not represent current recommendations."

[puttin]

There is a prerelease new version at https://developer.apple.com/library/prerelease/ios/documentation/Cocoa/Conceptual/CoreData/Concurrency.html