thoughtbot/trail-map — pull request #149 by samsymons (2014-01-10 19:21:36+00:00)
Title: Fix and rename some items on the iOS trail map

The link to the HIG was broken, and 'The Objective-C Programming Language' guide has been renamed by Apple.

'Learning Objective-C: A Primer' is also gone entirely from the dev center, I assume to be replaced by 'The Objective-C Programming Language'.