clean up redirects/404s & other random housekeeping

assets/sass/components/_global.scss

@@ -42,6 +42,7 @@ main {
   }
 }
 
+/*! Credit for cool link underlines: https://www.dannyguo.com/blog/animated-multiline-link-underlines-with-css/ */
 a {
   text-decoration: none;
   background-position: 0% 100%;