This should not happen in an initializer. An initializer is just exec…

…uted after config/application.rb is read. This means this would override whatever default set by the user. This commit fix it.

lib/coffee/rails/railtie.rb

@@ -1,7 +1,5 @@
 module Coffee::Rails
   class Railtie < ::Rails::Railtie
-    initializer :setup_coffee do
-      config.app_generators.javascript_engine 'coffee'
-    end
+    config.app_generators.javascript_engine :coffee
   end
 end