Delegate App calls to instance

railties/lib/generators/rails/app/templates/config.ru

@@ -1,4 +1,4 @@
 # This file is used by Rack-based servers to start the application.
 
 require ::File.expand_path('../config/environment',  __FILE__)
-run <%= app_const %>.instance
+run <%= app_const %>

railties/lib/generators/rails/app/templates/script/console.tt

@@ -2,4 +2,4 @@ require File.expand_path('../../config/boot',  __FILE__)
 require 'rails/commands/console'
 require File.expand_path('../../config/application',  __FILE__)
 
-Rails::Console.start(<%= app_const %>.instance)
+Rails::Console.start(<%= app_const %>)

railties/lib/generators/rails/app/templates/script/dbconsole.tt

@@ -2,4 +2,4 @@ require File.expand_path('../../config/boot',  __FILE__)
 require 'rails/commands/dbconsole'
 require File.expand_path('../../config/application',  __FILE__)
 
-Rails::DBConsole.start(<%= app_const %>.instance)
+Rails::DBConsole.start(<%= app_const %>)

railties/lib/rails/application.rb

@@ -8,7 +8,13 @@ module Rails
     class << self
       attr_writer :config
       alias configure class_eval
-      delegate :initialize!, :load_tasks, :load_generators, :root, :to => :instance
+      delegate :call,
+        :initialize!,
+        :load_generators,
+        :load_tasks,
+        :middleware,
+        :root,
+        :to => :instance
 
       private :new
       def instance

railties/test/application/middleware_test.rb

@@ -76,7 +76,7 @@ module ApplicationTests
       end
 
       def middleware
-        AppTemplate::Application.instance.middleware.active.map(&:klass).map(&:name)
+        AppTemplate::Application.middleware.active.map(&:klass).map(&:name)
       end
   end
 end