ruziyi

Results 3 issues of ruziyi

https://github.com/overtrue/share.js/blob/ca0a09719baa8e100b9405a5e5194687cd489d9e/src/js/social-share.js#L200 这里用inArray判断,如果返回-1,也会把最后sites里最后一个给删掉

![image](https://user-images.githubusercontent.com/7804644/27122953-e01f49e0-511e-11e7-9149-30069ce4c2fe.png)