JSX column API

[yesmeck]

有个问题就是原来 columns 里的 key 不能直接用在 <Column /> 里了，会访问不到，我暂时用 colKey 代替了，或者有更好的处理方法？ @afc163

[coveralls]

Coverage decreased (-0.7%) to 82.736% when pulling d5f336a on jsx-column into a412d0e on master.

[coveralls]

Coverage decreased (-0.7%) to 82.736% when pulling d5f336a on jsx-column into a412d0e on master.

[coveralls]

Coverage increased (+0.3%) to 83.713% when pulling 273299c on jsx-column into a412d0e on master.

[afc163]

可以参考：https://github.com/react-component/menu/ 通过 cloneElement 拿到 key 。

[coveralls]

Coverage decreased (-1.2%) to 82.287% when pulling d96c122 on jsx-column into a412d0e on master.

[yesmeck]

@afc163 这个应该可以了

[benjycui]

还有一个问题，这个应该成为推荐的语法么？

[afc163]

先不推荐，文档里要补充上明显的版本说明，避免 2.4 之前的用户使用了没效果。

[afc163]

回错地方。