Fix for collection view cells not appearing when project is built in Xcode 6 running on iOS 7.

https://developer.apple.com/library/ios/releasenotes/developertools/rn-xcode/Chapters/Introduction.html.
Want NSOrderedDescending instead of NSOrderedAscending.
Should be Ascending ....7.1 < 8.0
replaced current checking with NSFoundationVersionNumber
changed commonInit_MyCollectionViewCell to commonInit

Suggestions from @bskinner
Merge pull request #190 from MIT-Mobile/3.6/ipad-news-iOS7-collection-view

Fix for collection view cells not appearing when project is built in Xcode 6 running on iOS 7.