Add some simple examples for unconventional AMo and AP use

actionpack/examples/very_simple.rb

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+$:.push "rails/activesupport/lib"
+$:.push "rails/actionpack/lib"
+
+require "action_controller"
+
+class Kaigi < ActionController::Http
+  include AbstractController::Callbacks
+  include ActionController::RackConvenience
+  include ActionController::Renderer
+  include ActionController::Layouts
+  include ActionView::Context
+  
+  before_filter :set_name
+  append_view_path "views"
+  
+  def _action_view
+    self
+  end
+  
+  def controller
+    self
+  end
+
+  DEFAULT_LAYOUT = Object.new.tap {|l| def l.render(*) yield end }
+  
+  def _render_template_from_controller(template, layout = DEFAULT_LAYOUT, options = {}, partial = false)
+    ret = template.render(self, {})
+    layout.render(self, {}) { ret }
+  end
+  
+  def index
+    render :template => "template"
+  end
+  
+  def alt
+    render :template => "template", :layout => "alt"
+  end
+  
+  private
+  def set_name
+    @name = params[:name]
+  end
+end
+
+app = Rack::Builder.new do
+  map("/kaigi") {  run Kaigi.action(:index) }
+  map("/kaigi/alt") { run Kaigi.action(:alt) }
+end.to_app
+
+Rack::Handler::Mongrel.run app, :Port => 3000

actionpack/examples/views/layouts/alt.html.erb

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++ <%= yield %> +

actionpack/examples/views/layouts/kaigi.html.erb

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+Hello <%= yield %> Goodbye

actionpack/examples/views/template.html.erb

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+Hello <%= @name %>

activemodel/examples/amo_ap_example.rb

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+$:.push "activesupport/lib"
+$:.push "activemodel/lib"
+
+require "active_model/validations"
+require "active_model/deprecated_error_methods"
+require "active_model/errors"
+require "active_model/naming"
+
+class Person
+  include ActiveModel::Validations
+  extend ActiveModel::Naming
+  
+  validates_presence_of :name
+  
+  attr_accessor :name
+  def initialize(attributes = {})
+    @name = attributes[:name]
+  end
+  
+  def persist
+    @persisted = true
+  end
+  
+  def new_record?
+    @persisted
+  end
+  
+  def to_model() self end
+end
+
+person1 = Person.new
+p person1.valid?
+person1.errors
+
+person2 = Person.new(:name => "matz")
+p person2.valid?