When running cucumber features from a new rails 3 app requiring
'cucumber/rails/world' would raise:

uninitialized constant ActionDispatch::Integration::Session::Test (NameError)

Fixed by requiring 'test/unit/assertions' in action_dispatch/integration
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

If IntegrationSession is initialized with an objects that responds to #routes, automatically extend the URL helpers from the RouteSet onto it

Remove traces of SharedTestRoutes from user code; leave it as a standin for Rails.application.routes in Rails internal tests

	This attr_accessor can be set in a before filter or in the action itself.
    Overwriting default_url_options still works but will output a deprecation notice.

Fix a bunch of pending tests by providing an introspection mode for the Response object that does up-front parsing of the headers to populate things like @etag

Fixes RSpec integration example groups, which mixes its Matchers
module into ActiveSupport::TestCase.
Signed-off-by: NMichael Koziarski <michael@koziarski.com>

This is to fix the AWDWR tests until the application object is refactored to be a singleton.

[#2797 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Break up DependencyModule's dual function of providing a "depend_on" DSL and "included" block DSL into separate modules. But, unify both approaches under AS::Concern.

  Before :  get '/path', {}, 'Accept' => 'text/javascript'
  After  :  get '/path', {}, 'HTTP_ACCEPT' => 'text/javascript'