Package @ember-data/serializer/json

Ember Data 2.0 Serializer:

In Ember Data a Serializer is used to serialize and deserialize records when they are transferred in and out of an external source. This process involves normalizing property names, transforming attribute values and serializing relationships.

By default, Ember Data uses and recommends the JSONAPISerializer.

JSONSerializer is useful for simpler or legacy backends that may not support the spec.

For example, given the following User model and JSON payload:

```app/models/user.js import Model, { attr, belongsTo, hasMany } from '@ember-data/model';

export default class UserModel extends Model {