[PATCH] Fix for app method in console

Typing app in the Rails console should return an instance of ActionController::Integration::Session, but currently this raises an ArgumentError. Passing in an instance of AC::Dispatcher when instantiating the fake session fixes this issue.

lappy-jr:ando_plus_plus david$ script/console
Loading development environment (Rails 2.3.0)
>> app
ArgumentError: wrong number of arguments (0 for 1)
	from /Users/david/Documents/Rails/ando_plus_plus/vendor/rails/railties/lib/console_app.rb:19:in `initialize'
	from /Users/david/Documents/Rails/ando_plus_plus/vendor/rails/railties/lib/console_app.rb:19:in `new'
	from /Users/david/Documents/Rails/ando_plus_plus/vendor/rails/railties/lib/console_app.rb:19:in `new_session'
	from /Users/david/Documents/Rails/ando_plus_plus/vendor/rails/railties/lib/console_app.rb:11:in `app'
	from (irb):1