imported signalr 1.1.3 into NzbDrone.

src/Microsoft.AspNet.SignalR.Core/Infrastructure/IAckHandler.cs

@@ -0,0 +1,15 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
+
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Threading.Tasks;
+
+namespace Microsoft.AspNet.SignalR.Infrastructure
+{
+    public interface IAckHandler
+    {
+        Task CreateAck(string id);
+
+        bool TriggerAck(string id);
+    }
+}