||Implements an abstract quality measure used by search algorithms to rank
||Return value of the Heckerman-Geiger-Chickering measure for a Bayesian
network structure (also called Baysian Dirihlet metric).
||Measure the quality of the bayesian network on the dataset using local
||LCV - Local Cross Validation.
||LCV_LOO - Local Cross Validation, Leave-One-Out.
||Measure the quality of the bayesian network on the dataset using asymptotic
estimate of the standard bayes measure.