switch between jsonapi and feathers

[niccokunzmann]

The endpoints

• /v1/search
• /v1/resources

speak jsonapi no matter what.

Please implement a switch between feather and jsonapi based on the Accept header:

• application/vnd.api+json returns jsonapi compatible results
• application/json, application/*, */*, return feathers results

Ideas:

1. merge /v1/search and /search into /v1/search
   • make a switch based on content type
   • set the hook.params.isJsonapi = true
   • place an after hook which converts the result
2. OR let the endpoints as they are but
   • use the same hooks on all endpoints
   • remove the jsonapi conversion from the endpoints with feathers

Please create a pull-request to the development branch

[niccokunzmann]

fcee4bd should resolve this in case the tests run.