* gasp.c (change_base): Don't treat ' specially in MRI mode.

	* gasp.c (change_base): Don't treat ' specially in MRI mode.
	(process_file): Don't warn about missing END in MRI mode.
	(do_if): New static function.
	(get_mri_string, do_ifc): New static functions.
	(buffer_and_nest): Treat MRI mode like alternate syntax mode.
	(do_aendr): Change error message in MRI mode.
	(do_arepeat): Use REPT/ENDR in MRI mode.
	(do_formals): In MRI mode, add special NARG formal.
	(macro_expand): Various changes for MRI mode: permit a qualifier
	on the macro name; set special NARG formal; permit unnamed
	positional arguments; use && to concatenate named parameters;
	permit \d to specify an unnamed parameter; permit named parameters
	to not start with \; use == to see if a parameter exists.
	(getstring): In MRI mode, allow <> to quote a string.
	(K_IFEQ, K_IFNE, K_IFLT, K_IFLE, K_IFGE, K_IFGT): Define.
	(K_IFC, K_IFNC): Define.
	(struct keyword): Name structure used in kinfo array.
	(mrikinfo): New static array.
	(process_pseudo_op): Don't require leading '.' in MRI mode.
	Handle new MRI pseudo-op definitions.
	(add_keyword): New static function, broken out of process_init.
	(process_init): Use add_keyword.  In MRI mode, add mrikinfo table.
	(long_options): Add "mri".
	(show_usage): Mention -M/--mri.
	(main): Call process_init after processing arguments.  Handle -M.
	* doc/gasp.texi: Document -M/--mri.