title: how to install aws-sdk for ruby on windows
body: <p>I'm using a Windows machine,and very new in ruby 
  And in need to run AWS API for Ruby on windows</p>
  
  <p>I've installed Ruby 2.1.4 
  now I want to add  to aws-sdk to it :
  after downloading and extracting the SDK files , I cant understand how can I install it </p>
  
  <p>I've tried <code>gem install aws-sdk</code> , but I get an error of not finding 'aws' 
  what do I nned to do ?</p>