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/tasks/annotations.rake

@@ -0,0 +1,23 @@
+require 'source_annotation_extractor'
+
+desc "Enumerate all annotations"
+task :notes do
+  SourceAnnotationExtractor.enumerate "OPTIMIZE|FIXME|TODO", :tag => true
+end
+
+namespace :notes do
+  desc "Enumerate all OPTIMIZE annotations"
+  task :optimize do
+    SourceAnnotationExtractor.enumerate "OPTIMIZE"
+  end
+
+  desc "Enumerate all FIXME annotations"
+  task :fixme do
+    SourceAnnotationExtractor.enumerate "FIXME"
+  end
+
+  desc "Enumerate all TODO annotations"
+  task :todo do
+    SourceAnnotationExtractor.enumerate "TODO"
+  end
+end