add export method

common/Scrolls/iscroll.js

@@ -2151,6 +2151,9 @@ Indicator.prototype = {
 };
 
 IScroll.utils = utils;
+IScroll.prototype["handleEvent"] = IScroll.prototype.handleEvent;
+Indicator.prototype["handleEvent"] = Indicator.prototype.handleEvent;
+
 window.IScroll = IScroll;
 
 })(window, document, Math);