Link screenshot, updated api doc location

README.md

@@ -16,7 +16,7 @@ terminal emulators that support it.
 
 # API Documentation
 
-Go to the [API documentation](https://migueldeicaza.github.io/gui.cs/api/Terminal.html) for details.
+Go to the [API documentation](https://migueldeicaza.github.io/gui.cs/api/Terminal.Gui.html) for details.
 
 # Sample Usage
 
@@ -69,6 +69,8 @@ class Demo {
 
 This shows a UI like this:
 
+![Sample app](docfx/sample.png)
+
 # Running and Building
 
 Open the solution and run the sample program.