Update lib/generators/templates/README

lib/generators/templates/README

@@ -1,15 +1,14 @@
-
 ===============================================================================
 
 Some setup you must do manually if you haven't yet:
 
-  1. Setup default url options for your specific environment. Here is an
-     example of development environment:
+  1. Ensure you have defined default url options in your environments files. Here 
+     is an example of default_url_options appropriate for a development environment 
+     in config/environments/development.rb:
 
        config.action_mailer.default_url_options = { :host => 'localhost:3000' }
 
-     This is a required Rails configuration. In production it must be the
-     actual host of your application
+     In production host should be the actual host of your application.
 
   2. Ensure you have defined root_url to *something* in your config/routes.rb.
      For example: