update documentation for picolcd driver; cleanup of picolcd driver

LCDd.conf

@@ -775,9 +775,6 @@ Reboot=no
 
 ## Mini-box.com picoLCD (usblcd) driver ##
 [picolcd]
-# This is for the Mini-Box.com usblcd device that ships with the M300.  It can 
-# also be purchased separately but this driver has only been tested on the M300 
-# setup.
 
 # KeyTimeout is the time that LCDd spends waiting for a key press before cycling 
 # through other duties.  Higher values make LCDd use less CPU time and make 
@@ -786,7 +783,10 @@ Reboot=no
 # balanced value.
 KeyTimeout=500
 
-# Contrast: [default: 1000; legal: 0 - 1000]
+# Set the initial brightness [default: 1000; legal: 0 - 1000]
+Brightness=1000
+
+# Set the initial contrast [default: 1000; legal: 0 - 1000]
 Contrast=1000
 
 # Light the keys? i[default: on; legal: on, off]