Add association-rule scorer #930
Description
I want to add an AssociationScorer that scores items based on their associations with the query items. Several associations we should support:
- Conditional probability
$P[i|j]$ - Lift
$\frac{P[i,j]}{P[i]P[j]}$ - Biased lift with configurable bias factor
We should further allow to configure what interaction is used, and what which entity as well.