Pack readability_parser -- prolog/readability

build_agent(+Token:string, -Agent): Construct an agent for making API requests using your Readability Parser Token. Your token is available on your account settings page.
parse(+Agent, +UrlOrId:atom, -Response:dict): Like parse/4 but without extra options.
parse(+Agent, +UrlOrId:atom, -Response:dict, +Options:dict): Parse an article with Readability's Parser API. UrlOrId can be either an article's URL or a Readability article ID.
Response is a dict representing Readability's raw response. In most cases, you can just access this dict directly to find what you need.