make sure rubber initialized before rails config initializers run so …

…that we can use rubber config in initializer code

lib/rubber/railtie.rb

@@ -5,7 +5,7 @@ module Rubber
 
   class Railtie < Rails::Railtie
 
-    initializer "rubber.configure_rails_initialization" do
+    initializer "rubber.configure_rails_initialization", :before => :load_config_initializers do
       Rubber::initialize(Rails.root, Rails.env)
     end