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/activeresource/lib/active_resource/formats/json_format.rb

@@ -0,0 +1,23 @@
+module ActiveResource
+  module Formats
+    module JsonFormat
+      extend self
+      
+      def extension
+        "json"
+      end
+      
+      def mime_type
+        "application/json"
+      end
+      
+      def encode(hash)
+        hash.to_json
+      end
+      
+      def decode(json)
+        ActiveSupport::JSON.decode(json)
+      end
+    end
+  end
+end

vendor/rails/activeresource/lib/active_resource/formats/xml_format.rb

@@ -0,0 +1,34 @@
+module ActiveResource
+  module Formats
+    module XmlFormat
+      extend self
+      
+      def extension
+        "xml"
+      end
+      
+      def mime_type
+        "application/xml"
+      end
+      
+      def encode(hash)
+        hash.to_xml
+      end
+      
+      def decode(xml)
+        from_xml_data(Hash.from_xml(xml))
+      end
+      
+      private
+        # Manipulate from_xml Hash, because xml_simple is not exactly what we
+        # want for ActiveResource.
+        def from_xml_data(data)
+          if data.is_a?(Hash) && data.keys.size == 1
+            data.values.first
+          else
+            data
+          end
+        end      
+    end
+  end
+end