Broken support of ActiveModel resources in 0.10.x

Based on gem documentation it is possible to create some service for ActiveModel resource. In fact, it does not work anymore in 0.10.x

The gem documentation has to be updated on wiki https://github.com/cerebris/jsonapi-resources/wiki/Using-JSONAPI::Resources-with-non-ActiveRecord-models-and-service-objects

There is some code examples in tests, but they are very complicated for such simple task.

https://github.com/cerebris/jsonapi-resources/blob/master/test/fixtures/active_record.rb#L1545

Please provide a real working example. It is a pain in ass to hack the gem to provide simple API for non ActiveRecord resource. I have very simple use case: returning list of all timezones via API:

ActiveSupport::TimeZone.all.map { |z| [z.name, z.to_s] }

Read the linked wiki page and the ActiveModel-related examples around test/fixtures/active_record.rb:1545. Verify which non-ActiveRecord resource setup works in 0.10.x, then update the wiki with a simpler working example for a service object or ActiveModel resource, including the timezone-list use case.