george/prediction_tracker: Manage and score predictions on arbitrary topics. @ d1b625a549696bdfb5e2d286f72b8c47a65a60de

George C. Privon d1b625a549 add logarithmic scoring rule, update filename to reflect variety		vor 6 Jahren
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create_database.rkt	3b8fae716c don't force entry of prediction text every time, since prediction has unique ID	vor 6 Jahren
scoring_rules.rkt	d1b625a549 add logarithmic scoring rule, update filename to reflect variety	vor 6 Jahren
update_predictions.rkt	d1b625a549 add logarithmic scoring rule, update filename to reflect variety	vor 6 Jahren