glcd driver updates:

1. Remove connection type header files and put prototypes locally and in
   glcd-drivers.h. Don't fall into the pitfall of too many header files again.
2. Create a separate frame buffer structure (this allows easier re-use of
   the frame buffer functions).
3. Add a function to retrieve pixel values from framebuffer.
4. Add the 'serdisplib' connection type.
5. Support display width that are not a multiple of 8 (e.g. 122x32).

LCDd.conf

@@ -401,6 +401,21 @@ ConnectionType=t6963
 # legal: yes, no]
 #delayBus=no
 
+# serdisplib: Name of the underlying serdisplib driver, e.g. ctinclud. See
+# serdisplib documentation for details.
+serdisp_name=t6963
+
+# serdisplib: The display device to use, e.g. serraw:/dev/ttyS0,
+# parport:/dev/parport0 or USB:07c0/1501.
+serdisp_device=/dev/ppi0
+
+# serdisplib: Options string to pass to serdisplib during initialization. Use
+# this to set any display related options (e.g. wiring). The display size is
+# always set based on the Size configured above! By default, no options are
+# set.
+# Important: The value must be quoted as it contains equal signs!
+#serdisp_options="INVERT=1"
+
 
 
 ## glcdlib meta driver for graphical LCDs ##