remove the minimum of 1% drop-chance, now that we have streaks in
emit the streak bonus so we can display the growl notification. I'm
not sure I like this approach, because (1) we can't set growl order,
streak bonus comes first, and (2) I want to keep model-aware code to a
minimum so we can weed out the mem leak
woops, chanceMultiplier should be delta, not 1
show streakBonus in gpModifier
some streaks cleanup. set taskObj.streak AFTER model.set() so that we
get before/after values in listeners. Take away streak achievement if
they went 21, undo to 20