title: how to use own material design icons with materializecss?
body: <p>I need to know how to add own mdi icons in custom classes. the provided mdi classes provided don't meet my expectations.</p>
  
  <p>How can i add those and use them like the default one</p>
  
  <pre><code>&lt;i class="mdi-image-facebook"&gt;&lt;/i&gt;
  &lt;i class="mdi-image-linkedin"&gt;&lt;/i&gt;
  </code></pre>
  
  <p>Thanks in advance</p>