cf-set-speed! was missing in the export list

Signed-off-by: Frank Terbeck <ft@bewatermyfriend.org>
Change function name to put-field-into-termios!

...to signal destructive behaviour.

Signed-off-by: Frank Terbeck <ft@bewatermyfriend.org>
Allow make-termios-struct to create non-zero structures

Signed-off-by: Frank Terbeck <ft@bewatermyfriend.org>
Add an example script

Signed-off-by: Frank Terbeck <ft@bewatermyfriend.org>