openstax/tutor-js — pull request #5 by philschatz (2014-11-12 16:42:11+00:00)
Title: Update exercise json

- [x] remove `parts:[]`
- [x] rename `part.background` to `question.stimulus`

Example JSON:

```json
{
"type": "exercise",
"content": {
"background":"The spaceship moves at 1 m/s",
"questions":[
{
"id": "123",
"format": "short-answer",
"stem":"What is the rest mass in kg?"
},{
"id": "234",
"format": "multiple-choice",
"stem":"What is the force if it slams into a wall?",
"answers":[
{"id":"id1","value":"10","content":"10 N"},
{"id":"id2","value":"1","content":"1 N"}
]
}
]
}
}
```