Add analytics tool (matomo) to the SCOAP3 repository

[agentilb]

In order to study the way the users use the repository, it would be good to have some usage statistics for the use to know:

• How many users use the search interface
• how many users log in to the system
• how many users use tool such as affiliation, author export
• the use of the OAI-PMH feeds
• ...

[drjova]

Snippet

<!-- Matomo -->
<script>
  var _paq = window._paq = window._paq || [];
  /* tracker methods like "setCustomDimension" should be called before "trackPageView" */
  _paq.push(['trackPageView']);
  _paq.push(['enableLinkTracking']);
  (function() {
    var u=["https://webanalytics.web.cern.ch/"](https://webanalytics.web.cern.ch/);
    _paq.push(['setTrackerUrl', u+'matomo.php']);
    _paq.push(['setSiteId', '123']);
    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
    g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s);
  })();
</script>
<!-- End Matomo Code -->