windows下安装是不检测权限，直接全部通过

beike/Installer/Helpers/PermissionsChecker.php

@@ -30,7 +30,7 @@ class PermissionsChecker
     public function check(array $folders)
     {
         foreach ($folders as $folder => $permission) {
-            if (! ($this->getPermission($folder) >= $permission)) {
+            if (! ($this->getPermission($folder) >= $permission) && php_uname('s') != 'Windows NT') {
                 $this->addFileAndSetErrors($folder, $permission, false);
             } else {
                 $this->addFile($folder, $permission, true);