new ToolNotFoundDialog if HelpLibManager is not installed, rewritten debug messages, Help 3.0 renamed into HelpViewer (debug msgs)

src/AddIns/Misc/HelpViewer/Source/Controls/HelpLibraryManagerNotFound.cs

@@ -0,0 +1,21 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.Diagnostics;
+using System.Windows.Forms;
+using ICSharpCode.Core;
+using ICSharpCode.Core.WinForms;
+using ICSharpCode.SharpDevelop.Gui;
+
+namespace MSHelpSystem.Controls
+{
+	public class HelpLibraryManagerNotFoundForm : ToolNotFoundDialog
+	{
+		public HelpLibraryManagerNotFoundForm()
+			: base(StringParser.Parse("${res:AddIns.HelpViewer.HLMNotAvailableDownloadWinSDK}"),
+			       "http://www.microsoft.com/en-us/download/details.aspx?id=8279", null)
+		{
+		}
+	}
+}