Allow Users add comments in Github.Party

Like 大众点评 for Github repos.

README.md

@@ -2,6 +2,7 @@ Gogs - Go Git Service [![Build Status](https://travis-ci.org/gogits/gogs.svg?bra
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 [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/gogits/gogs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Comment-on-Github.Party](https://img.shields.io/badge/Comment%20on-Github.Party-yellow.svg)](https://github.party/item?id=14)
 
 Gogs (Go Git Service) is a painless self-hosted Git service.