Updated links to extension.

docs/index.md

@@ -10,7 +10,7 @@ What does alpha mean? Well, it means that it's now at a stage where you can have
 
 ## How do I try it out
 
-The easiest way to try out Avalonia is to install the [Visual Studio Extension](https://visualstudiogallery.msdn.microsoft.com/a4542e8a-b56c-4295-8df1-7e220178b873).
+The easiest way to try out Avalonia is to install the [Visual Studio Extension](https://marketplace.visualstudio.com/items?itemName=AvaloniaTeam.AvaloniaforVisualStudio).
 
 This will add a Avalonia project template and a Window template to the standard Visual Studo "Add" dialog (yes, icons still to come :) ):
 

docs/tutorial/gettingstarted.md

@@ -4,7 +4,7 @@
 
 ![](images/add-dialogs.png)
 
-The easiest way to try out Avalonia is to install the [Visual Studio Extension](https://visualstudiogallery.msdn.microsoft.com/e1c6ae1f-6fd9-467d-8f62-1e28b4225213).
+The easiest way to try out Avalonia is to install the [Visual Studio Extension](https://marketplace.visualstudio.com/items?itemName=AvaloniaTeam.AvaloniaforVisualStudio).
 
 This will add a Avalonia project template and a Window template to the standard Visual Studo “Add”
 dialog (yes, icons still to come :) ):

readme.md

@@ -42,7 +42,7 @@ using Direct2D and other operating systems using Gtk & Cairo.
 
 Avalonia is now in alpha. What does "alpha" mean? Well, it means that it's now at a stage where you
 can have a play and hopefully create simple applications. There's now a [Visual
-Studio Extension](https://visualstudiogallery.msdn.microsoft.com/e1c6ae1f-6fd9-467d-8f62-1e28b4225213)
+Studio Extension](https://marketplace.visualstudio.com/items?itemName=AvaloniaTeam.AvaloniaforVisualStudio)
 containing project and item templates that will help you get started, and
 there's an initial complement of controls. There's still a lot missing, and you
 *will* find bugs, and the API *will* change, but this represents the first time