added to_json method, did some renaming and tweaked public interface for use with the priority queue
added to_json method, did some renaming and tweaked public interface for use with the priority queue

opensourcewatch/opensourcewatch,githubs-google/curation,opensourcewatch/opensourcewatch,opensourcewatch/curation-scraper,opensourcewatch/curation-scraper,opensourcewatch/curation-scraper,githubs-google/curation,opensourcewatch/opensourcewatch,githubs-google/curation