Build change: Removed the 'freertos/' part in all #include <freertos/FreeRTOS.h>

This means that you will need to change the include path for FreeRTOS in your main wscript to include the specific folder for the include files.
The reason for the change is in order to make compatability with "Atmel Software Framework" where the freertos includes
does not reside in a 'freertos' subfolder, and hence the foldername in the include directive must go...