Added Stephen Davies output register extension code.

LCDd.conf

@@ -210,6 +210,10 @@ Keypad=no
 Backlight=no
 # If you have a switchable backlight.
 
+Outputport=no
+# If you have the additional output port ("bargraph") and you want to
+# be able to control it with the lcdproc OUTPUT command
+
 Size=20x4
 # Specifies the size of the LCD.
 # In case of multiple combined displays, this should be the total size.