Wrapper for E step in EM

Description

wrapper_E_step is used in the EM algorithm. It calls itself recursively in case of independent parameters.

Usage

wrapper_E_step(phylo, times_shared, distances_phylo, process, params_old,
  masque_data, F_moments, independent, Y_data_vec_known, miss, Y_data, U_tree,
  compute_E)