reuse construct_meta_rbh function as wrapper function for overlap based and correlation based rbh functions

[mjrmason]

this function should become a wrapper function that calls construct_multi_rbh_overlap_based or construct_multi_rbh_overlap_based based on some flag with options "overlap", "pearson" and "spearman" with "overlap" as default. And we need to move away from file lists and just use lists of membership matrices like in construct_multi_rbh_overlap_based.

oh and we should probably just rename it to compute_rbh