Update TODO list

TODO

-NuttX TODO List (Last updated December 7, 2015)
+NuttX TODO List (Last updated December 23, 2015)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 This file summarizes known NuttX bugs, limitations, inconsistencies with
@@ -14,7 +14,7 @@ nuttx/
   (3)  Signals (sched/signal, arch/)
   (2)  pthreads (sched/pthread)
   (0)  Message Queues (sched/mqueue)
-  (7)  Kernel/Protected Build
+  (8)  Kernel/Protected Build
   (4)  C++ Support
   (6)  Binary loaders (binfmt/)
  (11)  Network (net/, drivers/net)
@@ -471,6 +471,16 @@ o Kernel/Protected Build
   Status:      Open
   Priority:    Medium
 
+  Title:       I2C TOOL PATITIONING
+  Description: The tool at apps/system/i2c makes direct calls into MCU level
+               I2C logic within the OS and, hence, violates the OS/application
+               interface.  An I2C character driver will need to be developed
+               to perform the I2C interactions within the OS; the I2C tools
+               will need to be modified to use that driver to perform the
+               I2C accesses.
+  Status:      Open
+  Priority:    Medium.  Until this change is made, the I2C tool will not be
+               availabel in protected or kernel builds.
   Title:       C++ CONSTRUCTORS HAVE TOO MANY PRIVILEGES (PROTECTED MODE)
   Description: When a C++ ELF module is loaded, its C++ constructors are called
                via sched/task_starthook.c logic.  This logic runs in protected mode.

arch @ 2270b10d

-Subproject commit 1519d53e182663632e4b115baa1b3b15ce9840a3
+Subproject commit 2270b10d5a3b4bb0abd971664a4a6370c30efc52