Updated documentation

README.md

@@ -4,6 +4,7 @@
 ## Sample
 <img src="Screencasts/xamarin.forms.android.gif" height="600"/>
 <img src="Screencasts/xamarin.forms.ios.gif" height="600"/>
+<img src="Screencasts/xamarin.forms.uwp.gif" height="600"/>
 
 ## Support & Limitations
 
@@ -44,6 +45,14 @@ You have to register the custom renderer. I usually put this in the AssemblyInfo
 [assembly: ExportRenderer(typeof(TabbedPage), typeof(BadgedTabbedPageRenderer))]
 ```
 
+### UWP
+
+You have to register the custom renderer. I usually put this in the AssemblyInfo.cs file of my UWP csproj.
+
+```
+[assembly: ExportRenderer(typeof(TabbedPage), typeof(BadgedTabbedPageRenderer))]
+```
+
 ### Caution - Custom TabbedPage / Custom Renderers
 
 If you are using a custom renderer for TabbedPage please change it to inherit from `BadgedTabbedPageRenderer` and you are all set. Of course dont forget to register your own renderer.