Added docs for the updated to the menu system

CHANGELOG.md

@@ -8,7 +8,12 @@
 ### Deprecations
 
 * Removed all references to ActiveAdmin::Renderer. If you were using these
-  please update code to use an Arbre component
+  please update code to use an Arbre component. Removed
+  `ActiveAdmin:Views::HeaderRender` and replaced with
+  `ActiveAdmin::Views::Header` component.
+* ActiveAdmin::Menu and ActiveAdmin::MenuItem API has changed. If you were
+  creating custom menu items, the builder syntax has changed to. Menu#add now
+  accepts a MenuItem, instead of building the menu item for you.
 
 
 ## 0.4.2

docs/2-resource-customization.md

@@ -35,7 +35,8 @@ the resource from being displayed in the global navigation, pass `false` to the
 
 The menu method accepts a hash with the following options:
 
-* `:label` - The string label to display in the menu
+* `:label` - The string or proc label to display in the menu. If it's a proc, it
+  will be called each time the menu is rendered.
 * `:parent` - The string label of the parent to set for this menu
 * `:if` - A block or a symbol of a method to call to decide if the menu item
   should be displayed
@@ -51,6 +52,13 @@ To change the name of the label in the menu:
 
 By default the menu uses a pluralized version of your resource name.
 
+If you wish to translate your label at runtime, store the label as a proc
+instead of a string. The proc will be called each time the menu is rendered.
+
+    ActiveAdmin.register Post do
+      menu :label => proc{ I18n.t("mypost") }
+    end
+
 ### Drop Down Menus
 
 In many cases, a single level navigation will not be enough for the

lib/active_admin/menu.rb

@@ -1,5 +1,17 @@
 module ActiveAdmin
 
+  # Each Namespace builds up it's own menu as the global navigation
+  #
+  # To build a new menu:
+  #
+  #   menu = Menu.new do |m|
+  #     m.add MenuItem.new(:label => "Dashboard", :url => "/")
+  #     m.add MenuItem.new(:label => "Admin", :url => "/admin")
+  #   end
+  #
+  # If you're interested in configuring a menu item, take a look at the
+  # options available in `ActiveAdmin::MenuItem`
+  #
   class Menu
 
     attr_accessor :children