Calculate the parameters of the log-Normal that best approximates the given Dirichlet distribution. The approximation is the best in the sense that it minimizes the KL divergence from the Dirichlet to the log-Normal
convert_Normal_Multinom(conj.param, parms = list())The parameters of the Normal distribution of the linear predictor.
list: A vector containing the concentration parameters of the Dirichlet.
list: A list of extra known parameters of the distribution. Not used in this kernel.
Other auxiliary functions for a Multinomial outcome:
convert_Multinom_Normal(),
multnom_pred(),
update_Multinom()