title: dompdf font family issue
body: <p>I'm using Bamboo invoice as an invoice generator, and I'm trying to customize the invoice template, but no matter what I do, the font just won't seem to adjust.</p>
  
  <p>currently I have</p>
  
  <pre><code>body {
  margin: 0.5in;
  font-family: 'helvetica';
  font-size: 10pt;}
  </code></pre>
  
  <p>I've read up on it, and helvetica is an installed font, so it should work</p>
  
  <p>to make sure I changed it to 'courier'; which is also in the lib/fonts directory, but the font remains the same.</p>
  
  <p>Any help?</p>