Mention http-kit-fake on the client.html page.

First, thanks for this great project. I'm using it in a private project for the websocket support, but I'm also using the included client to talk to remote services.

I needed to stub the HTTP communication in my tests and started out just using robert.hooke, but evolved into a small DSL with a macro accepting various options. I've added a mention to this project on the client.html page of the website.