george/prediction_tracker: Manage and score predictions on arbitrary topics. @ 23ca846234f1e5aac5ddc2a6796114f83a4c9636

George C. Privon fc8f91931a remove non-existent 'score' from options list		%!s(int64=6) %!d(string=hai) anos
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create_database.rkt	976166a797 improve require formatting	%!s(int64=6) %!d(string=hai) anos
scoring_rules.rkt	7d3b4d3c4a type annotations, more appropriate computation of log score	%!s(int64=6) %!d(string=hai) anos
update_predictions.rkt	fc8f91931a remove non-existent 'score' from options list	%!s(int64=6) %!d(string=hai) anos