/**
  * Load a folder recursively
  */
 public static function loadFolder($folder)
 {
     $d = scandir($folder);
     foreach ($d as $file) {
         if ($file == "." || $file == "..") {
             continue;
         }
         if (is_dir("{$folder}/{$file}")) {
             Controller::loadFolder("{$folder}/{$file}");
         } else {
             require_once "{$folder}/{$file}";
         }
     }
 }