Add Google Analytics to front-end

[alexgorski]

UA-5330062-19

<script> (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','https://www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-5330062-19', 'auto'); ga('send', 'pageview'); </script>

[mik3caprio]

@alexgorski, feel free to add this to the template for the Metasearch index page, you can contribute freely to the React app at this point.