jQuery 3.0 Beta 发布，主要更新：
.show() and .hide() methods
Special case with `.data()` names
jQuery.Deferred is now Promises/A+ compatible
Added .catch() to Deferreds
软件详情：http://blog.jquery.com/2016/01/14/jquery-3-0-beta-released/
下载地址：https://github.com/jquery/jquery/issues?q=is%3Aissue+milestone%3A3.0.0
来自:开源中国社区
