Updated the podspec. The changes from here on out will be to upgrade compatibility with iOS 7
Removed the iOS7-deprecated shadow feature.
Updated the API to move away from 'shared' methods.
- Changes for iOS7 compatibility - Added CyclicDelegateRetainer.
Unrestricted number of concurrent operations, defaults to device-specific max.
Don't redraw when the rect is CGRectZero
Moving to the Apple-style category prefixes of ttt_...
Added map methods for NSSet.
Combined categories for NSFastEnumeration now named somewhat more accurately.
Renamed default to current.
Upped version number.