* Added IClientIM to IClientCore interfaces

* Changed SendInstantMessage, dropped fromAgentSession and imSessionID as security precaution, see http://opensimulator.org/wiki/OpenSim_0.6_IClientAPI#Porting_Guide for details on porting.
* Removed unused usings from Framework.*

OpenSim/Framework/Client/IClientIM.cs

@@ -0,0 +1,45 @@
+using System;
+using OpenMetaverse;
+
+namespace OpenSim.Framework.Client
+{
+    public class ClientInstantMessageArgs : EventArgs
+    {
+        public IClientCore client;
+        public string message;
+        public DateTime time;
+        public ClientInstantMessageSender sender;
+    }
+
+    public class ClientInstantMessageSender
+    {
+        public UUID ID;
+        public bool online;
+        public string name;
+        public Vector3 position;
+        public UUID regionID;
+    }
+
+    public delegate void ClientInstantMessage(Object sender, ClientInstantMessageArgs e);
+
+    public class ClientInstantMessageParms
+    {
+        public ClientInstantMessageSender senderInfo;
+    }
+
+    // Porting Guide from old IM
+    // SendIM(...)
+    //      Loses FromAgentSession - this should be added by implementers manually.
+    //      
+
+    public interface IClientIM
+    {
+        void SendInstantMessage(UUID fromAgent, string message, UUID toAgent,
+                        string fromName, byte dialog, uint timeStamp);
+
+        void SendInstantMessage(UUID fromAgent, string message, UUID toAgent,
+                                string fromName, byte dialog, uint timeStamp,
+                                bool fromGroup, byte[] binaryBucket);
+        event ImprovedInstantMessage OnInstantMessage;
+    }
+}