deployment target now set to iOS 7.0

Signed-off-by: Jake Bromberg <jake.bromberg@gmail.com>
dialog now shows for share button if account not logged in for service

Signed-off-by: Jake Bromberg <jake.bromberg@gmail.com>
downloaded album images now get saved *OFF* the main thread to the persistent store. no more choppy scrolling

Signed-off-by: Jake Bromberg <jake.bromberg@gmail.com>