Add daovoice integration

[dislazy]

Hi thanks for your；I have one idea to for next ,the daocloud have one daovoice(http://www.daovoice.io) ,that can make us talk simple, next can add it.
all happy new year;

[stevenjoezhang]

Happy new year!

[jiangtj]

@dislazy
You can try their docs
http://guide.daocloud.io/daovoice/网站应用（用户模块接入）-5869613.html
http://guide.daocloud.io/daovoice/网站应用（访客模块接入）-5871105.html
It's not difficult to integrate daovoice. The script can put in themes\next\layout\_custom\head.swig.

BTW, daovoice is similar to chatra theme-next/hexo-theme-next#577. 😂

[stale]

This issue has been automatically marked as stale because lack of recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[1v9]

@dislazy Maybe try chatra or tidio? Daovoice's documentation is a mess😫