Can't jsonify list object

JSON standard (http://json.org/) say, that any entity can be object or array.
When I try:

```
jsonify(['a','b','c', 'd', 'e', 'f'])
```

I got an error:

```
ValueError: dictionary update sequence element #0 has length 8; 2 is required
```

I think it is not a correct answer from flask. It should returns a JSON-object with array.
