Add setup and API files with enhanced user interface and error handling

api/api.php

@@ -0,0 +1,13 @@
+<?php
+// API Main Library
+class gbAPI {
+    public $authRequired;
+
+    function __construct() {
+        define("APP_PATH", __DIR__ . "/..");
+
+        if ($this->authRequited) {
+            $this->checkAuth();
+        }
+    }
+}

api/setup/save.php

@@ -0,0 +1,3 @@
+<?php
+// Load Main Libary
+require "../api.php";