I couldn't run the userguide in Vendo because Vendo overwrites the Controller class which requires $this->view which is not part of the userguide.
After renaming Controller to Vendo_Controller (and placing it in the vendo folder) I finally got this error: Fatal error: Class Payment_Driver cannot extend from interface Vendo_Payment_Driver in D:\xampp\htdocs\lohag\modules\vendo-billing\classes\payment\driver.php on line 13
using the latest vendo develop branch