title: Uninitialized constant when using AjaxDatatablesRails::Extensions
body: <p>I follow the guide from <a href="https://github.com/jbox-web/ajax-datatables-rails" rel="nofollow noreferrer">Ajax datatables rails repo</a> but when my app send request to server, it throw me this error</p>
  
  <pre><code>NameError (uninitialized constant AjaxDatatablesRails::Extensions)
  </code></pre>
  
  <p>And the line cause error is this include line</p>
  
  <pre><code>class BookDatatable &lt; AjaxDatatablesRails::Base
    include AjaxDatatablesRails::Extensions::Kaminari
  </code></pre>
  
  <p>Current using ajax-datables-rails 0.4.0</p>
  
  <p>Any help would be greatly appreciated.</p>