add live demo button in the navheader

Author: arpitnarechania

index.html

@@ -107,6 +107,8 @@ <h1 class="logo">
                 <div class="cta-container">
                     <a class="btn btn-primary btn-cta" href="http://github.com/exploropleth" target="_blank"><i
                             class="fab fa-github"></i> View on GitHub</a>
+                    &nbsp;&nbsp;
+                    <a class="btn btn-orange btn-cta m-xs" href="https://exploropleth.github.io/exploropleth" target="_blank"><i class="fas fa-rocket"></i> Live Demo</a>
                 </div><!--//cta-container-->
 
             </div><!--//container-->