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/lib/action_pack/version.rb

@@ -1,9 +1,9 @@
 module ActionPack #:nodoc:
   module VERSION #:nodoc:
-    MAJOR = 1
-    MINOR = 13
-    TINY  = 5
-    
+    MAJOR = 2
+    MINOR = 0
+    TINY  = 2
+
     STRING = [MAJOR, MINOR, TINY].join('.')
   end
 end