refactor main.js into smaller pieces, and moved navbar.js to assets

static/css/layouts/main.css

@@ -16,6 +16,13 @@ Yellow:  #FFC212
 body {
   background-color: #f9fafc;
   font-family: "Muli";
+
+  /* 
+    Removed smooth scrolling implementation in main.js in favor of
+    simpler css approach.
+    See: https://css-tricks.com/snippets/jquery/smooth-scrolling/ 
+  */
+  scroll-behavior: smooth;
 }
 
 h1,