Finalize cloudinary implementation

[ ] Create grunt tasks to list all images used by production database (user/room.avatar/poster and historyroom/one.data.images[]) and determine delta with cloudinary images via API (http://cloudinary.com/documentation/admin_api#browse_resources)
[ ] Implement old avatar/poster deletion on userUpdateHandler and roomUpdateHandler and roomDeleteHandler (http://cloudinary.com/documentation/admin_api#delete_resources)
[ ] Determine a way to tag uploaded images on upload and remove unused images on message post (if a user upload few images with upload widget but never post message, images remains on cloudinary). Investigate http://cloudinary.com/documentation/upload_widget (context: { moderation_status: ???? }) and http://cloudinary.com/documentation/admin_api#list_resources_by_tag and moderations or http://cloudinary.com/documentation/admin_api#list_resources_in_moderation_queues)

dbrugne / donut