Require i18n version 0.4.1 and fix monkey patch to work with it

Rails 3 pulls in i18n version 0.4.1 as a separate gem which then
breaks our code if it is running on a machine with rails 3 installed
as it tries to monkey patch i18n and fails, so this fix allows us
to run on a machine with rails 3 installed.

config/environment.rb

@@ -24,6 +24,7 @@ Rails::Initializer.run do |config|
   config.gem 'httpclient'
   config.gem 'SystemTimer', :version => '>= 1.1.3', :lib => 'system_timer'
   config.gem 'sanitize'
+  config.gem 'i18n', :version => '>= 0.4.1'
 
   # Only load the plugins named here, in the order given (default is alphabetical).
   # :all can be used as a placeholder for all plugins not explicitly named

config/initializers/i18n.rb

@@ -1,13 +1,14 @@
 module I18n
   module Backend
-    module Base
+    class Simple
+      module Implementation
         protected
         alias_method :old_init_translations, :init_translations
       
         def init_translations
           old_init_translations
 
-        merge_translations(:nb, translations[:no])
+          store_translations(:nb, translations[:no])
           translations[:no] = translations[:nb]
 
           friendly = translate('en', 'time.formats.friendly')
@@ -19,6 +20,7 @@ module I18n
           end
         end
       end
+    end
 
     module PluralizationFallback
       def pluralize(locale, entry, count)