added output piping for trans1 and trans2
now do input piping for trans1 and trans2
fix comments in matprod.c
tweak piped_matprod_vec_vec and vec_mat to be closer to matprod
change piped-matprod-test-d to piped-matprod-d-test
tweak piped_matprod_mat_vec and mat_mat to be closer to matprod
get rid of unused vars, etc.
change README, including new date