title: LoadError: cannot load such file — bcrypt_ext
body: <p>I have tried to deploy devise authentication on my rails app. </p>
  
  <p>I am getting this issue </p>
  
  <p>"cannot load such file -- bcrypt_ext"</p>
  
  <p>I see it is a common issue amongst windows based computers but the answers to other questions have not helped me yet.</p>
  
  <p>I am running Windows 8 x64 with x86 ruby and devkit</p>