* @param {Object} object is any Javascript object. Each property of it will
 *          be made into a StorkModel property.
 *
 *          Calls insertBeforeEvent(sourceModel, model, index) for each
 *          listener, where 'sourceModel' is this ListModel, 'model' is the
 *          added model
 *
 * @param {Number} index is the index where it now resides.
 */
ListModel.pushObject = function(object) {
    var model = StorkModel.createFromObject(object);
    this.items.push(model);
    this.informListeners("insertBeforeEvent",
                         [this, model, this.items.length-1]);
    return model;