iarc rating descriptors profile

Based off of the ```AppFeatures``` model

The requirements document.

![screen shot 2013-10-29 at 4 38 09 pm](https://f.cloud.github.com/assets/674727/1433398/380aca70-40f3-11e3-823f-531b463f6ef1.png)

![screen shot 2013-10-29 at 4 38 21 pm](https://f.cloud.github.com/assets/674727/1433399/399ac106-40f3-11e3-9661-960f447d9f10.png)