mml_with_parents_fast: Auxiliary function to mml_cpt_fast
In kelvinyangli/mbmml: Learn Markov blankets using Minimum Message Length

This is an auxiliary function to mml_cpt_fast. It calculates the mml score of a node given its parents.

1 2	mml_with_parents_fast(indexListPerNodePerValue, cachedIndicesList, arities, sampleSize, parentsIndices, targetIndex, alpha, statingPara)

`indexListPerNodePerValue`	A list of stored indices for each value of each node. It is obtained by the function count_occurance().
`cachedIndicesList`	A vector of indices stored to speed up calculations.
`arities`	A vector of varaible arities.
`sampleSize`	Sample size of a given data set.
`parentsIndices`	Indices of parents nodes.
`targetIndex`	Index of the target node. #' @param alpha A vector of concentration parameters for a Dirichlet distribution. Range is from zeor to positive infinity, length is equal to the arity of the target variable.
`statingPara`	If TRUE MML estimate of the parameters are also stated with extra 0.5log(pi*e/6) per parameter, otherwise 0.