README.md in rails-env-1.0.5 vs README.md in rails-env-1.0.6

@@ -1,7 +1,11 @@
 # rails-env
 
+[![Build Status](https://travis-ci.org/fnando/rails-env.svg)](https://travis-ci.org/fnando/rails-env)
+[![Code Climate](https://codeclimate.com/github/fnando/rails-env.png)](https://codeclimate.com/github/fnando/rails-env)
+[![Gem Version](https://badge.fury.io/rb/rails-env.svg)](http://badge.fury.io/rb/rails-env)
+
 Avoid environment detection on Rails.
 
 ## Installation
 
 Add this line to your application's Gemfile:
@@ -41,9 +45,26 @@
 ```ruby
 Rails.env.on(:any) do
   config.assets.version = '1.0'
 end
 ```
+
+## Gotcha
+
+Not all options can be defined through `Rails.env`. Rails propagates options on its engine file, meaning that every option defined on `config` afterwards must be manually propagated. 
+
+It's hard to automatically propagate every existing option, so we have the most common options covered, as you can see the list below:
+
+- action_controller
+- action_mailer
+- action_view
+- active_job
+- active_record
+- time_zone
+- auto/eager load paths
+- i18n
+
+If you need to set any option not covered by rails-env, [please open a ticket](https://github.com/fnando/rails-env/issues/new).
 
 ## Upgrading from previous versions
 
 Previous versions used to yield the configuration; this is no longer true on 1.0+.