Adding translatable content.
Added an /articles resource.
And now it works.
Adding the capability to override the tranlatable listener locale.
Merge remote-tracking branch 'origin/develop' into feature/api-65-i18n

Conflicts:
	composer.json
Merge pull request #5 from skqr/feature/api-65-i18n

[API-65] Handle translatable content
Adding a JSON schema for Article.
Merge remote-tracking branch 'origin/feature/api-65-i18n' into develop
Adding some tests for i18n.
Adding some tests.
Updating HATEOAS bundle.
Adding more tests for translations.
Updating HATEOAS.
Merge pull request #6 from skqr/feature/api-65-i18n

[API-65] Handle translatable content
Perfecting the Comment entity.
Merge pull request #7 from skqr/feature/api-66-decouple-serializers

[API-66] Decouple serializers
Updating the HATEOAS bundle.