Deleted extra comma from Chinese translate

It's important for IE(v_v), please merge and release new version, sorry for it.

And the **js/i18n/grid.locale-cn.js** in archive file from [Download](http://www.trirand.com/blog/?page_id=6) page isn't the lastest, please check it.

![screenshot_5_22_13_8_14_pm](https://f.cloud.github.com/assets/1219399/548044/32d39188-c2d9-11e2-985d-fdd8a6343574.png)