use js to open external links in new tab

assets/js/_main.js

@@ -4,6 +4,15 @@
 
 $(document).ready(function(){
 
+  // external links should open in a new tab
+  var host = location.hostname
+  var allLinks = document.querySelectorAll('a')
+  for (var i = 0; i < allLinks.length; ++i) {
+    if (allLinks[i].hostname !== host && allLinks[i].hostname !== '') {
+      allLinks[i].target = '_blank'
+    }
+  }
+
   // Sticky footer
   var bumpIt = function() {
       $('body').css('margin-bottom', $('.page__footer').outerHeight(true));