title: DOMPDF not caching some fonts
body: <p>I want to use 5 different fonts in my PDF (all of them TrueType). Yesterday I added one of them as <code>@font-face</code> and copied the file to <code>/storage/fonts</code> (I am using barryvdh/laravel-dompdf, so this is set by default). The .ufm was created and added to <code>dompdf_font_family_cache.php</code>, everything worked fine.</p>
  
  <p>Today I wanted to add the rest of the fonts, I have made separate <code>@font-face</code> properties, copied the fonts but no .ufm files were created, so they can't be used in the PDF.</p>
  
  <p><strong>Google Fonts</strong> can be added without any problem, and they are getting cached! </p>
  
  <pre><code>&lt;html&gt;
      &lt;head&gt;
          &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8"/&gt;
          &lt;style&gt;
              @page {
                  margin:0;
                  padding:0;
              }
              @font-face {
                  font-family: 'font1';
                  src: url('/storage/fonts/font1.ttf') format('truetype');
                  font-weight: normal;
                  font-style: normal;
              }
              @font-face {
                  font-family: 'font2';
                  src: url('/storage/fonts/font2.ttf') format('truetype');
                  font-weight: normal;
                  font-style: normal;
              }
              .font1{
                  text-align: center;
                  font-family: 'font1', sans-serif;
              }
              .font2{
                  font-family: 'font2', sans-serif;
                  text-align: center;
              }
          &lt;/style&gt;
      &lt;/head&gt;
      &lt;body&gt;
          &lt;div id="container"&gt;
              &lt;div class="font1"&gt;This font is cached&lt;/div&gt;
              &lt;div class="font2"&gt;This font isn't&lt;/div&gt;
          &lt;/div&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>I am on a local WAMP server (PHP 5.6.25), Laravel 5.3, DOMPDF 0.8 w/ laravel-dompdf.</p>
  
  <p>What am I missing?</p>