Switch to i18n version 0.5.0 but keep old style interpolation

It's impossible to stop rails 2 loading a newer i18n gem if it is
installed, so go with the flow and use the latest one but override
the interpolation pattern for now.

config/environment.rb

@@ -25,7 +25,7 @@ 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'
+  config.gem 'i18n', :version => '>= 0.5.0'
 
   # 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

@@ -1,4 +1,9 @@
 module I18n
+  original_verbosity = $VERBOSE
+  $VERBOSE = nil
+  INTERPOLATION_PATTERN = /\{\{(\w+)\}\}/
+  $VERBOSE = original_verbosity
+
   module Backend
     class Simple
       module Implementation