imported signalr 1.1.3 into NzbDrone.

src/Microsoft.AspNet.SignalR.Core/Tracing/TraceManager.cs

@@ -0,0 +1,31 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
+
+using System;
+using System.Collections.Concurrent;
+using System.Diagnostics;
+
+namespace Microsoft.AspNet.SignalR.Tracing
+{
+    public class TraceManager : ITraceManager
+    {
+        private readonly ConcurrentDictionary<string, TraceSource> _sources = new ConcurrentDictionary<string, TraceSource>(StringComparer.OrdinalIgnoreCase);
+
+        public TraceManager()
+        {
+            Switch = new SourceSwitch("SignalRSwitch");
+        }
+
+        public SourceSwitch Switch { get; private set; }
+
+        public TraceSource this[string name]
+        {
+            get
+            {
+                return _sources.GetOrAdd(name, key => new TraceSource(key, SourceLevels.Off)
+                {
+                    Switch = Switch
+                });
+            }
+        }
+    }
+}