[DRAFT] iron worker and  mq docs

![iron worker](https://f.cloud.github.com/assets/1712162/1603374/428c4b18-53a9-11e3-804b-b18ff977e234.png)
![iron mq](https://f.cloud.github.com/assets/1712162/1603419/188d1e0e-53aa-11e3-92e2-9d7b63521a1e.png)