Allow OPTIONS request to be used on RelationshipView#633

sliverc merged 4 commits intodjango-json-api:masterdjango-json-api/django-rest-framework-json-api:masterfrom

n2ygk:issue-314/no_instance_kwargn2ygk/django-rest-framework-json-api:issue-314/no_instance_kwargCopy head branch name to clipboard