imgareaselect選択ボックスダブルクリックイベントのサポートを追加

setOptions(options = $.extend({
                classPrefix: 'imgareaselect',
                movable: true,
                parent: 'body',
                resizable: true,
                resizeMargin: 10,
                onInit: function () {},
                onSelectStart: function () {},
                onSelectChange: function () {},
                onSelectEnd: function () {},
                onDbclick: function (){} // 
            }, options));

if (options.disable || options.enable === false) {
                $box.unbind('mousemove', areaMouseMove).unbind('mousedown', areaMouseDown);
                $(window).unbind('resize', windowResize);
            }

$box.dblclick(options.onDbclick);