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/activerecord/test/all.sh

@@ -1,8 +1,8 @@
 #!/bin/sh
 
 if [ -z "$1" ]; then
-	echo "Usage: $0 connections/<db_library>" 1>&2
+	echo "Usage: $0 <database>" 1>&2
 	exit 1
 fi
 
-ruby -I $1 -e 'Dir.foreach(".") { |file| require file if file =~ /_test.rb$/ }'
+ruby -I connections/native_$1 -e 'Dir["**/*_test.rb"].each { |path| require path }'