외부 코드를 Composer 기반으로 변경

vendor/autoload.php

@@ -0,0 +1,7 @@
+<?php
+
+// autoload.php @generated by Composer
+
+require_once __DIR__ . '/composer/autoload_real.php';
+
+return ComposerAutoloaderInit67b09c83b85c3bc0027caefe5bba171a::getLoader();