Immutable decorator

Hi,

I'm trying to get an immutable store going with this:

https://github.com/goatslacker/alt/blob/master/docs/utils/immutable.md

I might be missing something but this doesn't work for me when using bootstrap and iso.

If you were to do something like this:

``` javascript
onDeserialize(data) {
return Immutable.fromJS({
prop1: data.prop1,
prop2: data.prop2
});
}
```

or in the decorator:

``` javascript
onDeserialize: function onDeserialize(data) {
return _immutable2['default'].fromJS(data);
}
```

the state that is passed to onSerialize isn't the immutable map that you would expect.

However, if you were to use a plain old object with immutable values e.g.

``` javascript
GameStore.config = {
onSerialize(state) {
return {
gameData: state.gameData.toJS()
};
},
onDeserialize(data) {
return {
gameData: Immutable.fromJS(data.gameData)
};
}
}
```

it works as I would have thought. Is this correct as it seems at odds with issue #242?

Read docs/utils/immutable.md first, then reproduce the reported behavior with bootstrap and iso using the onSerialize and onDeserialize examples. Compare the immutable-store case with the plain-object case and issue #242; done means the expected state type and serialization behavior are clarified or the discrepancy is reproducibly fixed.

Written by the indexing model from the issue text.