Trouble with plugin.

Hi,

Just trying to write a simple plugin, I dont want it to be part of the app all the time so I want it to be contained in the plugin. When I access, http://0.0.0.0:3000/plugin_test I want it to display the index Ive created in my controller, Ive set it up in files,

init.rb:

ActionController::Base.send(:include, PluginTest)

lib/plugin_test.rb

module PluginTest

  class PluginTestController < ActionController::Base

      def index         puts "here"         return render :text => "yay some text!"       end

    end end

But when I visit the page, I get a routing error. Im sure Im doing something slightly wrong, but cant figure out what.