title: materializecss framework rails 4.2 integration
body: <p>I found <a href="http://materializecss.com" rel="nofollow noreferrer">this</a> css framework, unfortunately, it lacks gem support like what Twitter bootstrap does.</p>
  
  <p>So I downloaded their sass source and tried to integrate into rails asset pipeline albeit with errors.</p>
  
  <pre><code>Undefined variable: "$button-height".
    (in /app/assets/stylesheets/components/_buttons.scss:4)
  </code></pre>
  
  <p>Or should I put that into /lib folder?<img src="https://i.stack.imgur.com/uvhV2l.png" alt="enter image description here"></p>
  
  <p><strong>My question is: How to install this framework with rails 4.2?</strong></p>