Place this code inside your <head>:
<script src="https://cdn.rawgit.com/pozytywnie/gerritmine/master/resources/jquery.linkify.min.js"></script>
<script src="https://cdn.rawgit.com/cowboy/jquery-bbq/v1.2.1/jquery.ba-bbq.min.js"></script>
<script src="https://cdn.rawgit.com/pozytywnie/gerritmine/master/gerrit-integration.js?gerrit_server=YOUR_SERVER"></script>
Place this code in announcement banner
<script>var _tmp = $; var _tmp2 = jQuery;</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://cdn.rawgit.com/pozytywnie/gerritmine/master/resources/jquery.linkify.min.js"></script>
<script src="https://cdn.rawgit.com/pozytywnie/gerritmine/master/jira-gerrit-integration.js?gerrit_server=YOUR_SERVER"></script>
<script>var $ = _tmp; var jQuery = _tmp2;</script>