title: Mat-icon does not show icon
body: <p>I love angular material's design, but using it can be a pain.  The site shows an example using </p>
  
  <pre><code>&lt;mat-icon&gt;home&lt;/mat-icon&gt;
  </code></pre>
  
  <p>However, when I do the same thing in my project, I just see the text "home".</p>
  
  <p>I don't see where I need to do anything other than import MatIconModule.</p>
  
  <p>Does anyone have a clue?</p>
  
  <p>I'm using angular material v8.0.1. I also installed material-design-icons v 3.0.1. and have this in my index.html.  (i did one at a time)</p>
  
  <pre><code>&lt;link rel="stylesheet" href="https://storage.googleapis.com/non-spec-apps/mio-icons/latest/outline.css"&gt;
  </code></pre>