README.md in 3scale_client-2.4.2 vs README.md in 3scale_client-2.5.0.pre1

@@ -4,13 +4,13 @@
 [<img src="https://secure.travis-ci.org/3scale/3scale_ws_api_for_ruby.png?branch=master" alt="Build Status" />](http://travis-ci.org/3scale/3scale_ws_api_for_ruby)
 
 3scale is an API Infrastructure service which handles API Keys, Rate Limiting, Analytics, Billing Payments and Developer Management. Includes a configurable API dashboard and developer portal CMS. More product stuff at http://www.3scale.net/, support information at http://support.3scale.net/.
 
 ### Tutorials
-Plugin Setup: https://support.3scale.net/howtos/api-configuration/plugin-setup  
-Rate Limiting: https://support.3scale.net/howtos/basics/provision-rate-limits  
-Analytics Setup: https://support.3scale.net/quickstarts/3scale-api-analytics  
+Plugin Setup: https://support.3scale.net/howtos/api-configuration/plugin-setup
+Rate Limiting: https://support.3scale.net/howtos/basics/provision-rate-limits
+Analytics Setup: https://support.3scale.net/quickstarts/3scale-api-analytics
 
 ## Installation
 
 This library is distributed as a gem:
 ```sh
@@ -250,7 +250,15 @@
 human readable error description:
 
 ```ruby
 response.error_code    # "provider_key_invalid"
 response.error_message # "provider key \"foo\" is invalid"
-```  
-  
+```
+
+
+## Rack Middleware
+
+You can use our Rack middleware to automatically authenticate your Rack applications.
+
+```ruby
+use ThreeScale::Middleware, provider_key, :user_key # or :app_id
+```