title: Ruby on windows causes error Cannot load such file bcrypt_ext
body: <p>Trying to run ruby on my Windows 7 machine whenever i go to rails s or rake db:migrate i get the following error Cannot load such file bcrypt_ext.</p>
  
  <p>My ruby version is 2.2.1 my rails version is 4.2.0 and the bcrypt version is 3.1.10. All the gems install correctly when i run bundle install however whenever i try to rake it gives me that error. Any help would be greatly appreciated</p>