Upgrade to Rails 2.0.2

Upgraded to Rails 2.0.2, except that we maintain

   vendor/rails/actionpack/lib/action_controller/routing.rb

from Rail 1.2.6 (at least for now), so that Routes don't change. We still
get to enjoy Rails's many new features.

Also fixed a bug in Chunk-handling: disable WikiWord processing in tags (for real this time).

vendor/rails/actionpack/test/controller/verification_test.rb

@@ -37,6 +37,8 @@ class VerificationTest < Test::Unit::TestCase
     verify :only => :guarded_one_for_named_route_test, :params => "one",
            :redirect_to => :foo_url
 
+    verify :only => :no_default_action, :params => "santa"
+
     def guarded_one
       render :text => "#{params[:one]}"
     end
@@ -89,6 +91,10 @@ class VerificationTest < Test::Unit::TestCase
       render :text => "Was a post!"
     end
     
+    def no_default_action
+      # Will never run
+    end
+    
     protected
       def rescue_action(e) raise end
 
@@ -229,6 +235,11 @@ class VerificationTest < Test::Unit::TestCase
     assert_equal "Was a post!", @response.body
   end
     
+  def test_default_failure_should_be_a_bad_request
+    post :no_default_action
+    assert_response :bad_request
+  end
+    
   def test_guarded_post_and_calls_render_fails_and_sets_allow_header
     get :must_be_post
     assert_response 405