README.md in tuning-4.0.0.1 vs README.md in tuning-4.0.1.0

@@ -90,9 +90,18 @@
 <%= extending :application do %>
   <p>content</p>
 <% end %>
 ```
 
+### Template Handlers
+
+Ruby template handlers will automatically call to_json or to_xml:
+```ruby
[e-mail] do |user|
+  user.slice :name
+end
+```
+
 ### Records
 
 Empty strings will be nilify in the database to avoid sql errors or complex queries:
 ```ruby
 shop = Shop.new(name: '')