Support defining paginator on resource

[coryeb]

Updates Pagination/Formatters to check the resource paginator instead of the default paginator. Currently, if you've set a paginator directly on your resource, it's ignored in favor of the default.

@tiagopog Could you please take a look at this for me? Let me know if you have any questions or if there's anything you'd like me to add / change.

Thanks!

[coryeb]

@phantomphildius Would be great if you could take a look as well!