!103 后台用户退出后，重置登录状态

Merge pull request !103 from lepig/master

application/admin/library/Auth.php

@@ -77,6 +77,7 @@ class Auth extends \fast\Auth
         }
         $admin->token = '';
         $admin->save();
+        $this->logined = false; //重置登录状态
         Session::delete("admin");
         Cookie::delete("keeplogin");
         return true;