authors resources
add missing resources proposal
[api] CS-5332 - add authorstypes and articlesauthors
[api] CS-5332 - add authors search
[api resource] CS-5332 add article author type update
[new_api] CS-5332: unlink article author from article
[wip] prepare sorting
[new_api_resource] implement articleauthors sorting
[new_api_resource] add checking order parameter
Merge branch 'master' of github.com:sourcefabric/Newscoop into CS-5332_author_related_resources

Conflicts:
	newscoop/.htaccess
	newscoop/src/Newscoop/GimmeBundle/Serializer/Image/ImageUriHandler.php
[api][docs] improve docs
[api][docs] improve docs
[CS-5401] reorder article authors after removing one
CS-5410: use 404 code for responses without items
fix authors reordering
[api] fix update of article-author type
Merge pull request #667 from ahilles107/CS-5332_author_related_resources

Design author-related resources to support interactions in the AES