fix for: https://issues.apache.org/jira/browse/AMQNET-346

Adds Recover Method to NMS.  ActiveMQ and Stomp provider implementations added with tests.
diff --git a/src/main/csharp/Session.cs b/src/main/csharp/Session.cs
index 71ee69c..cead998 100644
--- a/src/main/csharp/Session.cs
+++ b/src/main/csharp/Session.cs
@@ -193,6 +193,11 @@
             messageQueueTransaction.Abort();
         }
 
+        public void Recover()
+        {
+            throw new NotSupportedException();
+        }
+
         // Properties
         public Connection Connection
         {