find signature listed start property

It looks like that does not exist. Also, it seems the example is wrong, it should be

```javascript
var predicate = { australian: true };
var people = db.find(predicate, function (err, objs) {
    if (err) throw err;
    assert.equals(3, objs.length);
};
```
Merge pull request #143 from mwawrusch/patch-1

find signature listed start property