Add Scheduler SignalR demo. Fix #4048

Author: vladimirivanoviliev

scheduler/scheduler-signalr-local-hub-locking-events/README.md

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+#Binding to SignalR
+
+This example demonstrates real-time push-notifications from SignalR(v2) with local hub. To see the real-time updates:
+
+1) Start the project and open the home page.
+2) Open the page in another browser window.
+3) Create, update or destroy Scheduler items.

scheduler/scheduler-signalr-local-hub-locking-events/SignalRLocalHub.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2012
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SignalRLocalHub", "SignalRLocalHub\SignalRLocalHub.csproj", "{742D4958-3961-4A90-AF8C-CFF110559981}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{742D4958-3961-4A90-AF8C-CFF110559981}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{742D4958-3961-4A90-AF8C-CFF110559981}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{742D4958-3961-4A90-AF8C-CFF110559981}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{742D4958-3961-4A90-AF8C-CFF110559981}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

scheduler/scheduler-signalr-local-hub-locking-events/SignalRLocalHub/App_Data/Sample.mdf

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+using Owin;
+using Microsoft.Owin;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+
+[assembly: OwinStartup(typeof(SignalRLocalHub.Startup))]
+namespace SignalRLocalHub
+{
+    public class Startup
+    {
+        public void Configuration(IAppBuilder app)
+        {
+            app.MapSignalR();
+        }
+    }
+}