Module breakout

[JohnLeeroy]

Extract and break the project into three areas.

• Pet Adoption App
• Models
• Api Abstraction
• Api Abstraction implementation.

The app will contain the view and most business logic. It will reference the model, and api modules.
The models module will contain all the data classes that the app will use.
The api abstraction will create the interface of interacting with an api and delivering models back. It will reference the model module.
The api abstraction implementation will be the specific backend that implements the abstraction's interfaces. Will reference the api abstraction module which depends on the model module.

This is a large task. I will make smaller issues for each of these.