Mentioned unimplemented directories

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1362 42af7a65-404d-4744-a932-0658087f49c3

graphics/README.txt

 README
 ^^^^^^
 
+This directory contains tiny graphics support for NuttX.  The contents of this directory
+are only build if CONFIG_NXGRAPHICS is defined in the NuttX configuration file.
+
 Roadmap
 ^^^^^^^
 
@@ -21,6 +24,14 @@ at the present, but here is the longer term roadmap:
   NXGLIB    - Low level graphics utilities and direct framebuffer rendering logic.
               NX is build on NXGLIB.
 
+Related Header Files
+^^^^^^^^^^^^^^^^^^^^
+
+include/nuttx/nxglib.h    -- Describes the NXGLIB C interfaces
+include/nuttx/nx.h        -- Describes the NX C interfaces
+include/nutt/nxtk.h       -- Will describe the NXTOOLKIT C interfaces
+include/nuttx/nxwidgets.h -- Will describe the NXWIDGETS classes
+
 Directories:
 ^^^^^^^^^^^^
 
@@ -52,3 +63,9 @@ graphics/nxsu
   queue to serialize window operations from many threads. The multi-user front-end
   is selected when CONFIG_NX_MULTIUSER is defined in the NuttX configuration file.
 
+graphics/nxtoolkit
+  This is where the NXTOOLKIT implementation will reside.
+
+graphics/nxwidgets
+  This is where the NXWIDGETS implementation will reside.
+