Minor update to Null Send Adapter

Just uploaded a minor update to my /dev/null Send Adapter for BizTalk 2004. ChangeLog:

• Added termination controller to prevent termination of the adapter during send operations
• Now correctly releases the transport proxy and message factory objects using Marshal.ReleaseComObject()
• When logging the message to the event log, the Message ID is now included alongside the InterchangeID (which is less useful).