title: Bad wkhtmltopdf's path for wicked_pdf and wkhtmltopdf
body: <p>I am using two Gems to convert HTML to PDF.</p>
  
  <p>Using "<a href="https://github.com/mileszs/wicked_pdf" rel="nofollow noreferrer">https://github.com/mileszs/wicked_pdf</a>"</p>
  
  <pre><code>gem 'wicked_pdf'
  gem "wkhtmltopdf-binary"
  </code></pre>
  
  <p>/initializer/wicked_pdf.rb</p>
  
  <pre><code>WickedPdf.config = {
    exe_path =&gt;  "xxxxxxxxxxxxxxxxxxx"
  }
  </code></pre>
  
  <p><strong>What path should I use for the exe_path ?</strong></p>