added qse_cmgr_t. still in primitive stage.

added qse_tio_getcmgr()/qse_tio_setcmgr()
added qse_pio_getcmgr()/qse_pio_setcmgr()
added qse_fio_getcmgr()/qse_fio_setcmgr()
added qse_fio_getcmgr()/qse_fio_setcmgr()
added mbs/wcs conversion functions using cmgr

qse/cmd/awk/awk.c

@@ -854,7 +854,7 @@ static int awk_main (int argc, qse_char_t* argv[])
 	/* TODO: change it to support multiple source files */
 	qse_awk_parsestd_in_t psin;
 	qse_awk_parsestd_out_t psout;
-	qse_mmgr_t* mmgr = QSE_NULL;
+	qse_mmgr_t* mmgr = QSE_MMGR_GETDFL();
 
 	memset (&arg, 0, QSE_SIZEOF(arg));