Add a tool to auto-generated documentation of NuttX configuration variables...

Add a tool to auto-generated documentation of NuttX configuration variables (still a work in progress)

ChangeLog

@@ -4576,3 +4576,8 @@
 	  handles the architecture independent part of _exit().  _exit()
 	  is used internally, but if it is called from the user, it should
 	  unregister any atexit() or on_exit() functions (2013-4-18).
+	* tools/kconfig2html.c: This is the beginning of a tool to
+	  replace the hand-generated documentation of the NuttX configruation
+	  variables with auto-generated documentation.  The initial checkin
+	  is an incomplete, poorly structured prototype that I hope to
+	  evolve into a useful tool (2014-4-20).