update url to alexa docs in readme

README.rdoc → README.markdown

@@ -1,28 +1,39 @@
-= Alexa Web Information Service
+# Alexa Web Information Service #
 
-== Usage
-  Alexa.url_info(:access_key_id => 'key', :secret_access_key => 'secret', :host => 'site.com')
-  # also you can specify option :response_group => 'Rank,ContactInfo' or any other valid group,
-  # see: http://docs.amazonwebservices.com/AlexaWebInfoService/2005-07-11/
-  # default response group takes all the available options
+## Installation ##
+
+```
+  gem install alexa
+```
+
+## Usage ##
+
+``` ruby
+  Alexa.url_info(:access_key_id => "key", :secret_access_key => "secret", :host => "site.com")
 
   returns object with methods:
   :xml_response, :rank, :data_url, :site_title, :site_description, :language_locale, :language_encoding,
   :links_in_count, :keywords, :related_links, :speed_median_load_time, :speed_percentile,
   :rank_by_country, :rank_by_city, :usage_statistics
+```
+
+NOTE: You can specify option `:response_group => "Rank,ContactInfo"` or any other valid group.
+See: [Docs](http://docs.amazonwebservices.com/AlexaWebInfoService/latest/)
+Default response group takes all the available options.
 
 You can set configuration in block like this:
+
+``` ruby
   Alexa.config do |c|
     c.access_key_id = "key"
     c.secret_access_key = "secret"
   end
+```
 
-== Installation
-  gem install alexa
+## Contributors ##
 
-== Contributors
-* rmoriz[http://github.com/rmoriz]
+* [rmoriz](https://github.com/rmoriz)
 
-== Copyright
+## Copyright ##
 
 Copyright (c) 2011 Wojciech Wnętrzak. See LICENSE for details.