Fix buffer clean up in \FreeRTOS_Plus_TCP_Minimal_Windows_Simulator\demo_logging.c.

Fix buffer clean up in \FreeRTOS_Plus_TCP_Minimal_Windows_Simulator\demo_logging.c.
Update queue code to allow an overwrite operation on a queue that is in a queue set, and add prvTestQueueOverwriteWithQueueSet() to test function.
Update Eclipse Win32 project to bring it closer the the Visual Studio equivalent.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2530 1d2547de-c912-0410-9cb9-b8ca96c0e9e2