Added MobileCoreServices Framework

MobileCoreServices gives access to the camera (if available) and the
image picker.
CameraController setup

Conform to UIImagePickerControllerDelegate,
UINavigationControllerDelegate protocols to use
cameraController.delegate. Add code to access camera if available.
PhotoLibrary Access

Added code to access the PhotoLibrary (if camera is not available) and
also implemented a default condition to show an alert.