Set isMainAggregate property for the main aggregate group
Some refactoring
AKContactViewController confirms to UIImagePickerControllerDelegate and UINavigationControllerDelegate
Added AKContactImage
Implemented imagePickerController:didFinishPickingMediaWithInfo:
Implemented imagePickerControllerDidCancel:
Moved contact image to AKContactViewController
Implemented AKContactImage
Implemented setImageData:
Renamed pictureData to imageData
Renamed picture to image
Added property isMainAggregate
Implemented main aggregate group count
Renamed pictureData to imageData
Added MobileCoreServices framework to project
Added AKContactImage to project