title: wicked_pdf gem throws Runtime error on Windows
body: <p><code>RuntimeError at /reports/1/print
  Bad wkhtmltopdf's path: bundler: command not found: which
  Install missing gem executables with `bundle install`
  </code></p>
  
  <p>Error is happening when <code>render pdf: "pdf_name"</code> is called inside the controller.</p>
  
  <p>Gems I am using - <code>rails 4.2</code>, <code>wkhtmltopdf-binary 0.9.9.3</code>, <code>wicked_pdf 0.11.0</code>. </p>
  
  <p>I don't understand what the error means and how I can resolve it. Thanks in advance.</p>