Preparing for new release...

Kernel changes:
- Remove an assert that was preventing xQueueSendFromISR() being used to give a mutex from an ISR (mutexes cannot be given using xSemaphoreGiveFromISR()).
- Introduce xTaskNotifyAndQueryFromISR() as the interrupt safe version of xTaskNotifyAndQuery().

Common demo task changes:
- Update IntSemTest.c to prove the theory that it is safe to give a mutex type semaphore from an interrupt using xQueueSendFromISR() instead of xSemaphoreGiveFromISR().
- Update TaskNotify.c to test the new xTaskNotifyAndQuery() from ISR fuction.

FreeRTOS/Source/queue.c

@@ -1219,9 +1219,11 @@ Queue_t * const pxQueue = ( Queue_t * ) xQueue;
 	if the item size is not 0. */
 	configASSERT( pxQueue->uxItemSize == 0 );
 
-	/* Normally a mutex would not be given from an interrupt, and doing so is
-	definitely wrong if there is a mutex holder as priority inheritance makes no
-	sense for an interrupts, only tasks. */
+	/* Normally a mutex would not be given from an interrupt, especially if 
+	there is a mutex holder, as priority inheritance makes no sense for an 
+	interrupts, only tasks.  However, on occasions when it is wanted to give
+	a mutex from an interrupt, use xQueueSendFromISR() in place of
+	xSemaphoreGiveFromISR(). */
 	configASSERT( !( ( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX ) && ( pxQueue->pxMutexHolder != NULL ) ) );
 
 	/* RTOS ports that support interrupt nesting have the concept of a maximum