Preparing for maintenance release:

Kernel source changes:
- Added xTaskNotifyStateClear() API function.
- Added the GCC Cortex-R port (existed for a while) into the main download.
- Improved the IAR RL78 port's handling of different memory model combinations.
- Removed some compiler warnings in heap_5.c.

Demo app changes:
- Added example use of xTaskNotifyStateClear() to the TaskNotify standard demo tasks.

FreeRTOS/Demo/PIC32MZ_MPLAB/RTOSDemo.X/nbproject/private/private.xml

@@ -16,6 +16,7 @@
         </group>
         <group name="Masters19024">
             <file>file:/C:/E/Dev/FreeRTOS/WorkingCopy/FreeRTOS/Demo/PIC32MZ_MPLAB/main.c</file>
+            <file>file:/C:/E/Dev/FreeRTOS/WorkingCopy/FreeRTOS/Demo/PIC32MZ_MPLAB/flop_mz.c</file>
         </group>
     </open-files>
 </project-private>