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/session_management_test.rb

@@ -5,11 +5,11 @@ class SessionManagementTest < Test::Unit::TestCase
     session :off
 
     def show
-      render_text "done"
+      render :text => "done"
     end
 
     def tell
-      render_text "done"
+      render :text => "done"
     end
   end
 
@@ -20,15 +20,15 @@ class SessionManagementTest < Test::Unit::TestCase
             :if => Proc.new { |r| r.parameters[:ws] }
 
     def show
-      render_text "done"
+      render :text => "done"
     end
 
     def tell
-      render_text "done"
+      render :text => "done"
     end
 
     def conditional
-      render_text ">>>#{params[:ws]}<<<"
+      render :text => ">>>#{params[:ws]}<<<"
     end
   end
 
@@ -36,11 +36,11 @@ class SessionManagementTest < Test::Unit::TestCase
     session :disabled => false, :only => :something
 
     def something
-      render_text "done"
+      render :text => "done"
     end
 
     def another
-      render_text "done"
+      render :text => "done"
     end
   end