message: added SVG note about Node
diff: <meta charset="utf-8">
  <meta name="author" content="https://github.com/gitbrent">
  <meta name="website" content="https://github.com/gitbrent/PptxGenJS/">
  - <meta name="updated" content="2018-10-14">
  + <meta name="updated" content="2018-10-27">
  <title>PptxGenJS Examples/Demo Page</title>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootswatch/4.1.2/yeti/bootstrap.min.css">
  <div class="text-muted">- Images from local and remote CDN URLs</div>
  <div class="text-muted">- Pre-encoded images (using <code>data:[base64]</code>)</div>
  <div class="text-muted">- Images with hyperlinks/tooltips</div>
  - <div class="text-muted">- SVG images</div>
  + <div class="text-muted">- SVG images <small class="text-warning ml-2">(not supported in Node)</small></div>
  </div>
  </div>
  <div class="card bg-light2">
  