Make Backbone.Model's fetch() return the model ifself

Backbone.Model.js

Backbone.Model.extend({
    /**
     * Return the model itself instead of fetched-data object
     * @param {Object} [options]
     * @returns {jQuery}
     */
    fetch: function (options) {
        options = options || {};

        var self  = this;
        var defer = $.Deferred();

        Backbone.Model.prototype.fetch.call(this, _.extend(options, {
            success: function (/* data */) {
                defer.resolve(self);
            },

            error: function() {
                defer.reject.apply(this, arguments);
            }
        }));

        return defer.promise();
    }
});