* fixed: bool (questions in fixed order; default: false)
* display: "one" or "all" (generally "all" for open questions, but...)
* fixed: bool (questions in fixed order; default: false)
* display: "one" or "all" (generally "all" for open questions, but...)
* answer: array of integers (for quiz) or html text (for paper); striped in exam mode
* active: boolean, is question in current assessment?
* points: points for this question (default 1)
* answer: array of integers (for quiz) or html text (for paper); striped in exam mode
* active: boolean, is question in current assessment?
* points: points for this question (default 1)