DataTrigger does not respect serializable attribute

[tejaede]

DataTrigger.addTrigger() overrides the getter and setter for a property on a prototype to route that property through montage-data. However, addTrigger() does not include the serializable attribute for that property as defined in the model.

This means that if a prototype declares a property as not serializable:

var MyClass = Montage.specialize({
   children: {
       value: undefined,
       writable: false
   }
});

A serialized instance of that class will not include children. This is expected.
However, if DataTrigger.addTriggers() is called on the prototype and then we use the result to create an instance. That serialized instance will include children.

var myClassA = new MyClass();
var myClassB = Object.create(MyClass.prototype);


// Add triggers using the DataService, ObjectDescriptor, and Prototype
// This is the prototype that the DataService will cache and use to create instances
var montageDataPrototype = Object.create(MyClass.prototype);

DataTriggers.addTriggers(aService, objectDescriptor, montageDataPrototype) 
var myClassC = Object.create(montageDataPrototype); 

var serializedA = serializer.serializeObject(myClassA); //No children
var serializedB = serializer.serializeObject(myClassB); //No children

var serializedC = serializer.serializeObject(myClassC); //Has children