Initial Client/Server Communication

#1
Followed the MagicOnion quickstart guide, borrowing code from the chat sample app to get something working

Assets/Scripts/MessagePack/MessagePackSerializationException.cs

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+// Copyright (c) All contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+
+namespace MessagePack
+{
+    /// <summary>
+    /// An exception thrown during serializing an object graph or deserializing a messagepack sequence.
+    /// </summary>
+    [Serializable]
+#if MESSAGEPACK_INTERNAL
+    internal
+#else
+    public
+#endif
+    class MessagePackSerializationException : Exception
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MessagePackSerializationException"/> class.
+        /// </summary>
+        public MessagePackSerializationException()
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MessagePackSerializationException"/> class.
+        /// </summary>
+        /// <param name="message">The exception message.</param>
+        public MessagePackSerializationException(string message)
+            : base(message)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MessagePackSerializationException"/> class.
+        /// </summary>
+        /// <param name="message">The exception message.</param>
+        /// <param name="inner">The inner exception.</param>
+        public MessagePackSerializationException(string message, Exception inner)
+            : base(message, inner)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MessagePackSerializationException"/> class.
+        /// </summary>
+        /// <param name="info">Serialization info.</param>
+        /// <param name="context">Serialization context.</param>
+        protected MessagePackSerializationException(
+          System.Runtime.Serialization.SerializationInfo info,
+          System.Runtime.Serialization.StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+}