Added lazyload plugin

_includes/footer.html

@@ -30,6 +30,7 @@
 <script src="{{ "/js/app.js" | prepend: site.baseurl }}"></script>
 <script src="{{ "/js/svg.js" | prepend: site.baseurl }}"></script>
 <script src="{{ "/js/cookie.js" | prepend: site.baseurl }}"></script>
+<script src="{{ "/js/jqlight.lazyloadxt.min.js" | prepend: site.baseurl }}"></script>
 
 <!-- Matomo -->
 <script type="text/javascript">