Initial Client/Server Communication

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

Assets/Scripts/MagicOnion/AsyncStreamReaderExtensions.cs

@@ -0,0 +1,35 @@
+using Grpc.Core;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MagicOnion
+{
+    public static class AsyncStreamReaderExtensions
+    {
+        public static async Task ForEachAsync<T>(this IAsyncStreamReader<T> stream, Action<T> action, CancellationToken cancellation = default(CancellationToken))
+        {
+            using (stream as IDisposable)
+            {
+                while (!cancellation.IsCancellationRequested && await stream.MoveNext(cancellation))
+                {
+                    action(stream.Current);
+                }
+            }
+        }
+
+        public static async Task ForEachAsync<T>(this IAsyncStreamReader<T> stream, Func<T, Task> asyncAction, CancellationToken cancellation = default(CancellationToken))
+        {
+            using (stream as IDisposable)
+            {
+                while (!cancellation.IsCancellationRequested && await stream.MoveNext(cancellation))
+                {
+                    await asyncAction(stream.Current);
+                }
+            }
+        }
+    }
+}