Add example app

[algodave]

The app will read beers' data from the following JSON:API endpoints, available at https://peaceful-hamlet-37069.herokuapp.com/

• GET /api/beers - let's call it the index endpoint
• GET /api/beers/1 (where 1 is a beer's ID) - let's call it the show endpoint

On the models layer:

• Define a Beer model
• The show endpoint also returns a beer's ingredients, included in the JSON:API document. Let's define an Ingredient model and an ingredients getter in the Beer model (hint: use JsonApiModel's includedDocs() method)

Screen 1: Loading beers

The app will use a PersistentJsonApiAdapter

• when the "Simulate offline" switch is turned on, adapter's setOffline() method should be invoked
• when the "Simulate offline" switch is turned off, adapter's setOnline() method should be invoked

After the "Load beers" button is clicked:

• while the load operation is in progress, an animation should be shown;
• when an error occurs, a red error message should be shown in the below area, different based on the exception
• on data successfully received, the next screen is shown

Screen 2: Beers list

This screen should consume data that are returned by the Beers API index endpoint. Each list item will consume some attributes that are available in the Beer model; choose the ones that you think are most relevant.

When user taps on an individual beer list item, the app navigates to the next screen.

Screen 3: Beer detail

On entering this screen, the whole set of a beer's data should be loaded by invoking the show endpoint. Hint: forceReload optional argument will need to be passed to adapter's find() method in order to prevent it from returning the cached beer record, which won't include ingredients because it was loaded with the index endpoint request.

• while the load operation is in progress, an animation should be shown;
• when an error occurs, a red error message should be shown in the below area, different based on the exception
• on data successfully received, all of a beer's data should be shown, like this:

This screen will consume the whole set of a beer's data, including ingredients. Feel free to arrange them according to their relevance, based on your understanding.