Add Torch client mod. Currently supports dialogs and notifications.

Add dialog output to !longhelp
Add !notify command
Silently inserts mod into session when client connects, server admins don't need to do anything to enable it.

Torch.Mod/Messages/MessageBase.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ProtoBuf;
+
+namespace Torch.Mod.Messages
+{
+    #region Includes
+    [ProtoInclude(1, typeof(DialogMessage))]
+    [ProtoInclude(2, typeof(NotificationMessage))]
+    #endregion
+
+    [ProtoContract]
+    public abstract class MessageBase
+    {
+        [ProtoMember(101)]
+        public ulong SenderId;
+
+        public abstract void ProcessClient();
+        public abstract void ProcessServer();
+
+        //members below not serialized, they're just metadata about the intended target(s) of this message
+        internal MessageTarget TargetType;
+        internal ulong Target;
+        internal ulong[] Ignore;
+        internal byte[] CompressedData;
+    }
+
+    public enum MessageTarget
+    {
+        /// <summary>
+        /// Send to Target
+        /// </summary>
+        Single,
+        /// <summary>
+        /// Send to Server
+        /// </summary>
+        Server,
+        /// <summary>
+        /// Send to all Clients (only valid from server)
+        /// </summary>
+        AllClients,
+        /// <summary>
+        /// Send to all except those steam ID listed in Ignore
+        /// </summary>
+        AllExcept,
+    }
+}