Change README to reflect more extensible usage

README.md

@@ -8,7 +8,9 @@ Install
 
 Add the gem to your `Gemfile`:
 
-    gem 'mail_view', :git => 'https://github.com/37signals/mail_view.git'
+```ruby
+  gem 'mail_view', :git => 'https://github.com/37signals/mail_view.git'
+```
 
 And run `bundle install`.
 
@@ -17,50 +19,52 @@ Usage
 
 Since most emails do something interesting with database data, you'll need to write some scenarios to load messages with fake data. Its similar to writing mailer unit tests but you see a visual representation of the output instead.
 
-    class Notifier < ActionMailer::Base
-      def invitation(inviter, invitee)
-        # ...
-      end
-
-      def welcome(user)
-        # ...
-      end
-
-      class Preview < MailView
-        # Pull data from existing fixtures
-        def invitation
-          account = Account.first
-          inviter, invitee = account.users[0, 2]
-          Notifier.invitation(inviter, invitee) 
-          # ::Notifier.invitation(inviter, invitee)  # May need to call with '::'
-        end
-
-        # Factory-like pattern
-        def welcome
-          user = User.create!
-          mail = Notifier.welcome(user)
-          user.destroy
-          mail
-        end
-      end
+```ruby
+  # app/mailers/mail_preview.rb or lib/mail_preview.rb
+  class MailPreview < MailView
+    # Pull data from existing fixtures
+    def invitation
+      account = Account.first
+      inviter, invitee = account.users[0, 2]
+      Notifier.invitation(inviter, invitee) 
     end
 
+    # Factory-like pattern
+    def welcome
+      user = User.create!
+      mail = Notifier.welcome(user)
+      user.destroy
+      mail
+    end
+
+    # Stub-like
+    def forgot_password
+      user = Struct.new(:email, :name).new('name@example.com', 'Jill Smith')
+      mail = UserMailer.forgot_password(user)
+    end
+  end
+```
+
 Methods must return a [Mail][1] or [TMail][2] object. Using ActionMailer, call `Notifier.create_action_name(args)` to return a compatible TMail object. Now on ActionMailer 3.x, `Notifier.action_name(args)` will return a Mail object.
 
 Routing
 -------
 
 A mini router middleware is bundled for Rails 2.x support.
 
-    # config/environments/development.rb
-    config.middleware.use MailView::Mapper, [Notifier::Preview]
+```ruby
+  # config/environments/development.rb
+  config.middleware.use MailView::Mapper, [MailPreview]
+```
 
 For Rails³ you can map the app inline in your routes config.
 
-    # config/routes.rb
-    if Rails.env.development?
-      mount Notifier::Preview => 'mail_view'
-    end
+```ruby
+  # config/routes.rb
+  if Rails.env.development?
+    mount MailPreview => 'mail_view'
+  end
+```
 
 Now just load up `http://localhost:3000/mail_view`.