Update metadata rules and individual articles (#142)

* Add conceptual topic type for framework

* Add NET WPF article topic types

* Framework winforms overview topic types

* Update metadata

* Update walkthrough-my-first-wpf-desktop-application.md

dotnet-desktop-guide/framework/wpf/app-development/application-management-overview.md

@@ -1,6 +1,7 @@
 ---
 title: "Application Management Overview"
 ms.date: "03/30/2017"
+ms.topic: overview
 dev_langs:
   - "csharp"
   - "vb"

dotnet-desktop-guide/framework/wpf/app-development/building-a-wpf-application-wpf.md

@@ -1,6 +1,7 @@
 ---
 title: "Compile an app"
 ms.date: "03/30/2017"
+ms.topic: overview
 dev_langs:
   - "csharp"
   - "vb"

dotnet-desktop-guide/framework/wpf/app-development/deploying-a-wpf-application-wpf.md

@@ -2,6 +2,7 @@
 title: "Deploy an app"
 description: Explore the deployment technologies that Windows and the .NET Framework use for Windows Presentation Foundation (WPF) applications.
 ms.date: "03/30/2017"
+ms.topic: overview
 helpviewer_keywords: 
   - "WPF applications [WPF], deployment"
   - "deployment [WPF], applications"

dotnet-desktop-guide/framework/wpf/app-development/navigation-overview.md

@@ -2,6 +2,7 @@
 title: "Navigation Overview"
 description: Learn about support for browser-style navigation used in standalone applications and XAML browser applications in Windows Presentation Foundation (WPF). 
 ms.date: "03/30/2017"
+ms.topic: overview
 dev_langs:
   - "csharp"
   - "vb"

dotnet-desktop-guide/framework/wpf/app-development/wpf-add-ins-overview.md

@@ -1,6 +1,7 @@
 ---
 title: Add-ins overview
 ms.date: "03/30/2017"
+ms.topic: overview
 helpviewer_keywords:
   - "add-ins and XAML browser applications [WPF]"
   - "add-ins overview [WPF]"

dotnet-desktop-guide/framework/wpf/app-development/wpf-windows-overview.md

@@ -2,6 +2,7 @@
 title: Windows overview
 description: Get acquainted with the basics of creating and managing windows for standalone applications in Windows Presentation Foundation (WPF).
 ms.date: "03/30/2017"
+ms.topic: overview
 dev_langs: 
   - "csharp"
   - "vb"

dotnet-desktop-guide/framework/wpf/app-development/wpf-xaml-browser-applications-overview.md

@@ -2,6 +2,7 @@
 title: "XAML Browser Applications Overview"
 description: Learn how XAML browser applications combines features of Web applications and rich-client applications in the Windows Presentation Foundation (WPF).
 ms.date: "03/30/2017"
+ms.topic: overview
 dev_langs:
   - "csharp"
   - "vb"