added calendar button for upcoming events

assets/js/script.js

 	});
 
 });
+function downloadEvent(){
+
+}

layouts/events/single.html

     <div class="row">
       <div class="col-lg-8 offset-lg-2 text-center">
         <h1>{{ .Title }}</h1>
-        <!-- <ul class="list-inline mb-50">
-          <li class="list-inline-item"><a href="{{ `author/` | relLangURL }}{{ .Params.Author | urlize }}/">{{ .Params.Author }}</a></li>
+        <ul class="list-inline mb-50">
+          <!-- <li class="list-inline-item"><a href="{{ `author/` | relLangURL }}{{ .Params.Author | urlize }}/">{{ .Params.Author }}</a></li> -->
           <li class="list-inline-item">{{ dateFormat "Monday, Jan 2, 2006" .Params.event_start_date }}</li>
-        </ul> -->
+        </ul>
         <img class="img-fluid mb-50 lozad" data-src="{{ .Params.Image | absURL }}" alt="blog-image">
       </div>
       <div class="col-lg-8 offset-lg-2">