gaoyan10/xuetangx-Mobile — pull request #1 by cgcgbcbc (2013-12-08 20:00:18+00:00)
Title: add grunt check task to validate  data/*

```bash
$ npm install
$ grunt check
```
and it will show invalid files.
if the content of file A is s,A is valid if and only if : s is a json or {s} is a json.