Pass the model to dataForCustomAction within params for enabling serialization

[feanor07]

There was a relevant comment regarding this one at #41 (comment)

I think it would be helpful to pass the model itself in addition to modelId to dataForCustomAction; because it is very common case to call model.serialize() in order to send the object itself as the payload just like as if model.save() is called.

[feanor07]

As of now; one needs to inject the store to relevant adapter and implement dataForCustomAction as follows:

dataForCustomAction(params) {
        return this.store.peekRecord('model_name', params.modelId).serialize()
}

it would be nicer to have this like

dataForCustomAction(params) {
        return params.model.serialize()
}

[feanor07]

we can close this peacefully after the merge! thx!

[feanor07]

@Exelord can we take a release with this commit included anytime soon? it is kind of urgent for us :(

[adambedford]

@feanor07 Do you have a good way of passing the model in the payload of all modelActions as well?