Didn't add header to NSManagedObject+ActiveRecord.h,
NSManagedObject+ActiveRecord.m and RKManagedObjectCache.h .
NSManagedObject+ActiveRecord was adapted from someone else, and
RKManagedObjectCache has different code formatting. Will update those
once I get confirmation on them.
* Removed RestKit from inheritance hierarchy
* Mappings are implemented as concrete classes
* Mapper is much more flexible & powerful
* Much more robust error handling
* Serialization is reimplemented as an object mapping operation
* Added ability to serialize to JSON natively
* Reworked Core Data integration
* Simplified the codebase substantially
