Added diagram to readme.

README.md

@@ -1,6 +1,6 @@
 # Bokeh
 
-Bokeh (pronounced boh-kay) is a simple, scalable and blazing-fast task queue built on [Node.js](http://nodejs.org) and [ZeroMQ](http://zeromq.org). It allows you to offload tasks from your main application process and distribute them among a pool of workers. Workers can be running on the same host as your application, or scaled out onto multiple machines for greater processing power.
+bokeh (pronounced boh-kay) is a simple, scalable and blazing-fast task queue built on [Node.js](http://nodejs.org) and [ZeroMQ](http://zeromq.org). It allows you to offload tasks from your main application process and distribute them among a pool of workers. Workers can be running on the same host as your application, or scaled out onto multiple machines for greater processing power.
 
 When you want a worker to run a task, just submit it to the broker using the client API. A task is simply any class in your application which responds to the `run` method.
 
@@ -10,6 +10,8 @@ Bokeh consists of three components:
 2. The broker process which manages the pool of workers.
 3. The worker processes which are responsible for running tasks.
 
+![](https://github.com/nullobject/bokeh/raw/master/doc/bokeh.png)
+
 ## Installation
 
 ### ZeroMQ