better logging in update client

src/NzbDrone.Update/UpdateApp.cs

@@ -33,7 +33,7 @@ namespace NzbDrone.Update
                 var startupArgument = new StartupContext(args);
                 NzbDroneLogger.Register(startupArgument, true, true);
 
-                Console.WriteLine("Starting NzbDrone Update Client");
+                Logger.Info("Starting NzbDrone Update Client");
 
                 X509CertificateValidationPolicy.Register();
 
@@ -41,6 +41,8 @@ namespace NzbDrone.Update
 
                 Logger.Info("Updating NzbDrone to version {0}", BuildInfo.Version);
                 _container.Resolve<UpdateApp>().Start(args);
+
+                Logger.Info("Update compleded successfully");
             }
             catch (Exception e)
             {

src/NzbDrone.Update/UpdateEngine/InstallUpdateService.cs

@@ -84,17 +84,18 @@ namespace NzbDrone.Update.UpdateEngine
                 _backupAndRestore.Backup(installationFolder);
                 _backupAppData.Backup();
 
-                _logger.Info("Moving update package to target");
-
                 try
                 {
+                    _logger.Info("Emptying installation folder");
                     _diskProvider.EmptyFolder(installationFolder);
+
+                    _logger.Info("Copying new files to target folder");
                     _diskProvider.CopyFolder(_appFolderInfo.GetUpdatePackageFolder(), installationFolder);
                 }
                 catch (Exception e)
                 {
-                    _backupAndRestore.Restore(installationFolder);
                     _logger.FatalException("Failed to copy upgrade package to target folder.", e);
+                    _backupAndRestore.Restore(installationFolder);
                 }
             }
             finally