add new iarc rating bodies to constants, attach to regions (bug 931948)

Populate mkt/constants/ratingsbodies.py with the rating bodies and ratings from the IARC requirements document.

![screen shot 2013-10-28 at 1 26 48 pm](https://f.cloud.github.com/assets/674727/1423683/4c9b0214-400f-11e3-98a5-8536ac849f48.png)

Attach the rating bodies to their respective regions based on our specs document.

![screen shot 2013-10-28 at 1 27 44 pm](https://f.cloud.github.com/assets/674727/1423692/6ea5d406-400f-11e3-943c-6d8f77004f9c.png)