link dummy app with gem

Author: siutin

dummy_app/config/application.rb

@@ -14,5 +14,6 @@ class Application < Rails::Application
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration should go into files in config/initializers
     # -- all .rb files in that directory are automatically loaded.
+    config.eager_load_paths += %W( #{config.root}/../lib )
   end
 end