A new adapter for Chinese pop App weixin/wechat

[KasperDeng]

I created a new adapter for hubot for the chinese popular IM app weixin (another name is wechat) which is created by Tencent.

The hubot-weixin-adapter is running very well, it serves us in lots of scenarios and makes lots of fun for us.
In order to get more idea/enhancement and being widely used in the world, we decided to contribute the source code.
The github repo is https://github.com/KasperDeng/Hubot-WeChat

Could you help update the adapters.md for the page, to add this new hubot-weixin into the adapter list and link to our github repo? Thanks in advance.

The main contributors for this adapter are

• bumblebee team
  • Jeff Zhu
  • Yinsong Ma
  • Kasper Deng
• Shouxi Huang

[bkeepers]

The list of hubot adapters in the hubot documentation is being replaced with a link to a GitHub topic search. Add the hubot-adapter topic to your repository on GitHub to include it in this list.

/cc #1320