Implement category for QLPreviewController
Add QuickLook subspec
Add QuickLook subspec to default spec
Run through Xcode 6 recommended configuration
Proper NS_REPLACES_RECEIVER usage
Fix delegate getter on iOS 8, UIAlertView/UIActionSheet behaviors

Closes #245, #251.
Fix the things I broke against 7.1
Tag v2.2.5
Merge pull request #250 from tpot/feature/quicklook

Add category for QLPreviewController in QuickLook framework
Merge branch 'master' of https://github.com/zwaldowski/BlocksKit