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/railties/lib/test_help.rb

@@ -5,15 +5,16 @@ require_dependency 'application'
 silence_warnings { RAILS_ENV = "test" }
 
 require 'test/unit'
+require 'active_support/test_case'
 require 'active_record/fixtures'
+require 'action_controller/test_case'
 require 'action_controller/test_process'
 require 'action_controller/integration'
-require 'action_web_service/test_invoke'
-require 'breakpoint'
+require 'action_mailer/test_case' if defined?(ActionMailer)
 
 Test::Unit::TestCase.fixture_path = RAILS_ROOT + "/test/fixtures/"
 ActionController::IntegrationTest.fixture_path = Test::Unit::TestCase.fixture_path
 
 def create_fixtures(*table_names)
-  Fixtures.create_fixtures(RAILS_ROOT + "/test/fixtures", table_names)
+  Fixtures.create_fixtures(Test::Unit::TestCase.fixture_path, table_names)
 end