Add private functions permute_inner and permute_outer that separate the permutation of inner and outer dimensions as found in transform_mat_papt
Add public functions permute_rows and permute_cols that select either permute_inner or permute_outer depending on storage
Add public function transform_mat_paq that mirrors transform_mat_papt but allows different permutations for rows and cols and allows nonsquare matrices
Use transform_mat_paq to test umfpack bindings' numeric factorization outputs
Incidentally macroize umfpack tests to reduce boilerplate overhead
permute_innerandpermute_outerthat separate the permutation of inner and outer dimensions as found intransform_mat_paptpermute_rowsandpermute_colsthat select eitherpermute_innerorpermute_outerdepending on storagetransform_mat_paqthat mirrorstransform_mat_paptbut allows different permutations for rows and cols and allows nonsquare matricestransform_mat_paqto test umfpack bindings' numeric factorization outputs