Creates the view-stack layout.
function _createLayout() {
        this._renderables = {
            views: [],
            transferables: []
        };
        this._viewStack = [];
        this.layout = new LayoutController({
            layout: ViewStackLayout.bind(this),
            layoutOptions: this.options,
            dataSource: this._renderables
        });
        this.add(this.layout);
        this.layout.on('layoutend', _processAnimations.bind(this));
    }