george/prediction_tracker: Manage and score predictions on arbitrary topics.

George C. Privon 23e8a801ca re-format(indent) code		5 éve
..
create_database.rkt	976166a797 improve require formatting	6 éve
scoring_rules.rkt	7d3b4d3c4a type annotations, more appropriate computation of log score	6 éve
update_predictions.rkt	23e8a801ca re-format(indent) code	5 éve