add zhihu daily plugin

Add Zhihu daily plugin.zhihu is chinese website like quora

there are three kinds of parameter you can use as we can see in the following picture

![](http://ww2.sinaimg.cn/mw1024/7d5cf487gw1emhwekom6zj211g0o0780.jpg)

![](http://ww4.sinaimg.cn/mw1024/7d5cf487gw1emhwel3byjj211e0nk77p.jpg)

![](http://ww1.sinaimg.cn/mw1024/7d5cf487gw1emhwem7hvoj211g0nojvj.jpg)

![](http://ww3.sinaimg.cn/mw1024/7d5cf487gw1emhwel6lilj211i0nkju2.jpg)