Merge pull request #5 from malandrew/master

Add group parameter to rails initializer to run on asset precompilation

lib/sprockets/engine.rb

@@ -1,7 +1,7 @@
 if defined?(Rails)
   module Sprockets
     class CommonJSEngine < Rails::Engine
-      initializer :setup_commonjs do |app|
+      initializer :setup_commonjs, :group => :assets do |app|
         app.assets.register_postprocessor 'application/javascript', CommonJS
       end
     end