added note on source

web/SimpleWebPage.py

@@ -137,6 +137,7 @@ def get_header(opts):
   ''' + setup2HTML(opts) + '''
   <title>''' + opts.title + '''</title>
   <style>
+    /* Style modified from: https://css-tricks.com/snippets/php/display-styled-directory-contents/ */
         * {
       padding: 0;
       margin: 0;