add a photographer to the database for the “user” using the device (from teachers code)
add camera button to devices user
add segue to AddPhotoViewController and unwind to PhotosByPhotographerMapViewController
add photo to database / show alerts for errors
add location manager to location update
save taken image to disk to use the imageURL and thumbnailURL / generate thumbnail
fix auto layout issue on iphone
add warning to add the AddPhotoViewController to iPad view