github/hubot — pull request #393 by zhangxiao (2013-01-16 15:24:16+00:00)
Title: Give Message random ID so adapter could know which message it is replying on

* When message instances are initiated, a 16-bytes random ID is given.
* In Response, message_id is also put in envelope so adapter could read that to know which message it is replying on.

In this way, a HTTP adapter could work. Please see this issue created by me:
https://github.com/github/hubot/issues/389