Add rails documentation

README.md

@@ -115,13 +115,22 @@ Installation
 
     gem install i18n-translators-tools
 
-**Latest from sources***
+**Latest from sources**
 
     git clone git://github.com/pejuko/i18n-translators-tools.git
     cd i18n-translators-tools
     rake gem
     gem install pkg/i18n-translators-tools.gem
+
+**Rails**
 
+in `Gemfile` add
+
+    gem 'i18n-translators-tools'
+
+then run
+
+    bundle install
 
 How to add support into your application
 ----------------------------------------
@@ -165,6 +174,48 @@ It is hightly recommended to use Fallbacks backend together with
 Translate. If you have experienced nil or empty translations due to
 untranslated strings this can fix the problem.
 
+**Rails**
+
+Your `config/application.rb` should look like this
+
+```ruby
+require File.expand_path('../boot', __FILE__)
+
+require 'rails/all'
+
+# Require the gems listed in Gemfile, including any gems
+# you've limited to :test, :development, or :production.
+Bundler.require(*Rails.groups)
+
+I18n::Backend::Simple.send(:include, I18n::Backend::Translate)
+I18n::Backend::Simple.send(:include, I18n::Backend::TS)
+I18n::Backend::Simple.send(:include, I18n::Backend::Fallbacks)
+
+module MyApplication
+  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.
+
+    # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
+    # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
+    # config.time_zone = 'Central Time (US & Canada)'
+
+    # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
+    # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
+    # config.i18n.default_locale = :de
+    config.i18n.load_path += Dir[Rails.root.join('config', 'locales', '**', '*.yml').to_s]
+    config.i18n.load_path += Dir[Rails.root.join('config', 'locales', '**', '*.ts').to_s]
+    config.i18n.default_locale = :en
+
+    # Do not swallow errors in after_commit/after_rollback callbacks.
+    config.active_record.raise_in_transactional_callbacks = true
+  end
+end
+```
+
+This config file is adding support for TS files.
+
 
 Examples
 --------
@@ -305,7 +356,7 @@ handle them but Translate backend can.
 
 
 Configure file format
--------------------
+---------------------
 
 Configuration files are normal ruby files which should return hash.
 It is not necessary to use all switches.