Update README.md

Some more small additions.

examples2/README.md

@@ -25,4 +25,18 @@ I also invite others to contribute changes, including documentation. Let's impro
 default experience of ruby + libui for new users, as well as provide working reference
 implementations for all functionality made available in ruby-libui.
 
-So far (this update) almost 76 components are verified by examples in the subdirectory examples2/ here. I think we are close to 50% in total now or almost at 50%.
+So far (this update) almost 80 components are verified by examples in the subdirectory examples2/ here. I think we are close to 50% in total now or almost at 50%.
+
+Widgets that have been added to this subdirectory include:
+
+  button.rb
+  checkbox.rb
+  color_button.rb
+  combobox.rb
+  editable_combobox.rb
+  entry.rb
+  grid.rb
+  password_entry.rb
+  search_entry.rb
+  slider.rb
+  window.rb