Initial Client/Server Communication

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

Assets/Scripts/MagicOnion.Abstractions/GenerateDefineDebugAttribute.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MagicOnion
+{
+    /// <summary>
+    /// instruction for moc.exe, surround #if symbol with output code.
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Interface, AllowMultiple = false, Inherited = false)]
+    public class GenerateDefineDebugAttribute : Attribute
+    {
+        public GenerateDefineDebugAttribute()
+        {
+        }
+    }
+}