fixes around http response caching, updated the mb icon in the dashboard, and isolated web socket events

MediaBrowser.Common/Kernel/IKernel.cs

@@ -13,6 +13,11 @@ namespace MediaBrowser.Common.Kernel
     /// </summary>
     public interface IKernel : IDisposable
     {
+        /// <summary>
+        /// Occurs when [has pending restart changed].
+        /// </summary>
+        event EventHandler HasPendingRestartChanged;
+
         /// <summary>
         /// Gets the application paths.
         /// </summary>
@@ -84,12 +89,6 @@ namespace MediaBrowser.Common.Kernel
         /// <value>The HTTP server URL prefix.</value>
         string HttpServerUrlPrefix { get; }
 
-        /// <summary>
-        /// Gets the TCP manager.
-        /// </summary>
-        /// <value>The TCP manager.</value>
-        IServerManager ServerManager { get; }
-
         /// <summary>
         /// Gets the plug-in security manager.
         /// </summary>