Removed NotificationGenerator - no longer needed with iOS7 APIs
Backing out old changes that don't make sense in iOS7

Conflicts:
	Classes/BetterRefreshControl.m
Upgraded the project to target iOS7, added 64-bit, made changes to fix 64-bit compiler warnings

Conflicts:
	Classes/Comic.m
	Classes/ComicListViewController.m
	TLLoadingView.m
	xkcd.xcodeproj/project.pbxproj
Added xkcd.xccheckout to the .gitignore
Removed NotificationGenerator - no longer needed with iOS7 APIs
Converted syntax to Modern Objective-C

Conflicts:
	Classes/SingleComicViewController.m
	Classes/xkcdAppDelegate.m
Clean up vestigial code