Function: Handles the wp pro quiz class autoloading.
Function: Runs the wp pro quiz upgrade after the plugins are loaded.
Function: Formats the quiz cloze type answers into an array to be used when comparing responses.
Filter Hook: Filters the value of quiz question answer before processing.
Filter Hook: Filters whether to convert quiz question cloze to lowercase or not.
Filter Hook: Filters the value of quiz question answer after processing.
Function: Casts an instance of PHP stdClass to the type of given class name.