added a new sed command 'C' that resembles the cut utility dropped the cut utility. added qse_str_nrcat()/qse_mbs_nrcat()/qse_wcs_nrcat()
added a new sed command 'C' that resembles the cut utility dropped the cut utility. added qse_str_nrcat()/qse_mbs_nrcat()/qse_wcs_nrcat()