- added check for inte_pton in the DLL, if it does not exist we use our own implementation.
- added nn_cancelioex, nn_getqueuedcompletionstatusex, nn_isvistaplus.
- implemented checks for PIPE_REJECT_REMOTE_CLIENTS since this is not supported in XP
- implemented nn_worker_cancelio, this will post a status that the worker thread can respond to by Canceling the handle.
- implemented worker routine for XP using GetQueuedCompletionStatus.
- refactored the implementation into two functions namely nn_worker_routine_xp and nn_worker_routine_vista. Tha proper routine will run depending on the running OS.