README.md in translation_center-1.7.2 vs README.md in translation_center-2.0.1

@@ -3,11 +3,11 @@
 [![Gem Version](https://badge.fury.io/rb/translation_center.png)](http://badge.fury.io/rb/translation_center)
 [![Dependency Status](https://gemnasium.com/BadrIT/translation_center.png)](https://gemnasium.com/BadrIT/translation_center)
 
 ## Introduction
 
-Translation Center is a multi lingual web engine for Rails 3 apps. It builds a translation center community with translators and admins from your system users.
+Translation Center is a multi lingual web engine for Rails apps. It builds a translation center community with translators and admins from your system users.
 
 ![Alt text](https://raw.github.com/BadrIT/translation_center/master/samples/view_keys.png "View category translations")
 
 ## Translation Center can be used by:
 
@@ -34,11 +34,11 @@
   * Users can vote up translations
   * Default translation in English for keys
 
 ## Getting started
 
-TranslationCenter works with Rails 3.1 onwards. You can add it to your Gemfile with:
+TranslationCenter works with Rails 4.x onwards. You can add it to your Gemfile with:
 
 ```ruby
 gem 'translation_center'
 ```
 
@@ -104,11 +104,42 @@
 ```ruby
 def can_admin_translations?
   self.email == '[e-mail]'
 end
 ```
+## Rails 3
+If you are Using rails 3 you can revert back to tag 1.7.2 
 
+## MongoDB Support
+  * Create a SQL database so your app connects to both MongoDB and this new SQL database.
+  * Create a new SQL table (ex: translator_users) that will be considered as translator user and has a foreign key for your MongoDB user (ex: mongo_user_id)
+  * Add `acts_as_translator` to your ActiverRecord user (ex: TranslatorUser) model not Mogno User 
+  * Update translation_center.yml to the translator model name if needed
+    ```ruby 
+      tranlator_type: 'TranslatorUser'
+    ```
+  * You also need to add these methods in an initializer in case Devise is not existing in Mongo, for example `translation_authentication.rb` :
+    ```ruby
+      module TranslationCenter
+        class ApplicationController < ActionController::Base
+
+          # current_user is needed in views
+          helper_method :current_user
+
+          def authenticate_user!
+            # redirect to login if user not signed in
+          end
+
+          def current_user
+            # write code that returns the current ActiveRecord user in session
+          end
+
+        end
+      end  
+      ```
+    in the current_user method make sure that you return the ActiveRecord user not the Mongo user because that's what we will use in translation center engine.
+
 ## How to use
 
 Add new key to your views, for example:
 
 ```ruby
@@ -282,9 +313,14 @@
 ## Credits
 
 ![BadrIT](http://www.badrit.com/images/logo-main.png)
 
 Translation Center is maintained and developed by [BadrIT](http://badrit.com/)
+
+## Contributing
+
+We hope that you will consider contributing to Translation Center.
+You will usually want to write tests for your changes. To run the test suite, go into Translation Center's top-level directory and run "bundle install" and then "rspec spec" 
 
 ## Support
 
 Help us make this engine better by submitting any bugs or enhancments in the issues page for this project.
 We also added an error page that will appear to you if any error goes with translation_center.