Update zh-cn.json.

Somewhere can be better. e.g.:"Loading..." can be translated into "请稍候", "1072 bytes" and something like it (in the text previewer) can be translated into "1072 B" ("B/KB/MB" are more commonly used by Chinese OS rather than "bytes/kilobytes/megabytes")
Merge pull request #368 from LimiQS/patch-1

Update zh-cn.json.