README.md in 3scale_client-2.8.2 vs README.md in 3scale_client-2.9.0

@@ -10,11 +10,12 @@
 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:
+This library is distributed as a gem, for which Ruby 2.1 or JRuby 9.1.1.0 are
+minimum requirements:
 ```sh
 gem install 3scale_client
 ```
 Or alternatively, download the source code from github:
 http://github.com/3scale/3scale_ws_api_for_ruby
@@ -90,22 +91,22 @@
 
 ```ruby
 class ApplicationController < ActionController
   # Call the authenticate method on each request to the API
   before_filter :authenticate
-        
+
   # You only need to instantiate a new Client once and store it as a global variable
   # You should store your provider key in the environment because this key is secret!
   def create_client
-    @@threescale_client ||= ThreeScale::Client.new(:provider_key => ENV['PROVIDER_KEY'])    
+    @@threescale_client ||= ThreeScale::Client.new(:provider_key => ENV['PROVIDER_KEY'])
   end
-        
-  # To record usage, create a new metric in your application plan. You will use the 
-  # "system name" that you specifed on the metric/method to pass in as the key to the usage hash. 
-  # The key needs to be a symbol. 
+
+  # To record usage, create a new metric in your application plan. You will use the
+  # "system name" that you specifed on the metric/method to pass in as the key to the usage hash.
+  # The key needs to be a symbol.
   # A way to pass the metric is to add a parameter that will pass the name of the metric/method along
   def authenticate
-    response = create_client.authrep(:app_id => params["app_id"], 
+    response = create_client.authrep(:app_id => params["app_id"],
                                      :app_key => params["app_key"],
                                      :usage => { params[:metric].to_sym => 1 })
     if response.success?
       return true
       # All fine, the usage will be reported automatically. Proceeed.