Implemented Reply for Response and HipChat Adapter

Implemented the reply method for the HipChat adapter and made the
Response.Reply method actually call the reply method on the originating
adapter when it gets a reply.
Implemented Emote for Response and HipChat adapter

Implemented the Emote method for the HipChat adapter and made the
Response.Emote method actually call the Emote method on the originating
adapter when it gets an Emote command.
Merge pull request #113 from jamesbascle/master

Implement the Reply and Emote commands on HipChat adapter