Make JSONAPISource/JSONAPISerializer more customizable

[MaKleSoft]

I understand that the JSONAPISource was designed to work with a JSON API compliant data source. However, it would be nice if it was easily customizable to support variations of the spec. Specifically:

• Allow providing specific resources paths for certain models in the schema
• Provide a simple hook for making adjustments to serialization/deserialization. The current deserialize method is not very suited to be overwritten since one would need to copy/paste a lot of code. For example, what if instead of {users: [..], ...} I want to parse something like {data: [...], ...}? This should be possible through a simple hook like parseData: response -> response.data.

Perhaps it would make sense to create an intermediate model like AjaxSource or something that covers some of the common ground of remote sources in general but provides more flexibility regarding encoding, serialization etc.

[dgeb]

I've had similar issues and have begun to make progress on improving customizability. See the following commits:

• 83135b2 - Introduce JSONAPISource#resourcePath
• 163a7ee - Introduce resourceLink and resourceAttr methods to Serializer.

[MaKleSoft]

Awesome, thanks!

[dgeb]

The JSONAPISource / JSONAPISerializer are starting to fill out with a number of methods that can be overridden and customized.

I'm going to close this now, but am open to requests to allow for specific types of customization.