Upgrade to Rails 2.2.0

As a side benefit, fix an (non-user-visible) bug in display_s5().
Also fixed a bug where removing orphaned pages did not expire cached summary pages.

vendor/rails/actionpack/lib/action_controller/translation.rb

@@ -0,0 +1,13 @@
+module ActionController
+  module Translation
+    def translate(*args)
+      I18n.translate *args
+    end
+    alias :t :translate
+
+    def localize(*args)
+      I18n.localize *args
+    end
+    alias :l :localize
+  end
+end