Main app page:
A listing of horses that the user has added. For each horse, it should display a photo of the horse, the horse's name, and a last updated timestamp. When a horse is tapped, it should open the Horse Detail page
A button to add a horse that opens the Add Horse page

Horse detail page:
Show the horse's photo, name, breed, age, and color.
Below that will be a section for Feeding Details. This will be a text area that allows the user to type in any feeding instructions for this horse. There should be a way for the user to edit this text.
Below that section, will be a section called Immunizations. This section will have a reverse chronological list of the horse's immunization. Each item in the list should show the medicine given, the date it was given on, and the name of the veterinarian who gave it. A user should be able to add a new immunization and edit the existing ones in the list.

Add horse page:
The user should be able to type in these details of the horse: name, breed, birth date, and color.
In the Add Horse view, the user should be able to use the phone's camera to add a photo of the horse.

Use NSUserDefault for data persistence, not coredata