show iarc descriptors and interactive elements (bug 931947)

- Reflect API changes in Zamboni app resource (https://github.com/mozilla/zamboni/pull/1382).
- Display PEGI content descriptor icons when in PEGI-seered regions.
- Display interactive element icons in every other region than PEGI-seered ones.

- Interactive Elements Mobile

![screen shot 2013-11-14 at 4 59 42 pm](https://f.cloud.github.com/assets/674727/1547027/c0a39384-4d92-11e3-90e3-d6d53f27bdf1.png)


- Interactive Elements Desktop

![screen shot 2013-11-14 at 5 01 24 pm](https://f.cloud.github.com/assets/674727/1547026/bea9f6fe-4d92-11e3-9c93-23b35524a808.png)


- Descriptors Mobile

![screen shot 2013-11-14 at 5 01 44 pm](https://f.cloud.github.com/assets/674727/1547024/bb9649ae-4d92-11e3-8a4f-10fe0c1bcad1.png)


- Descriptors Desktop

![screen shot 2013-11-14 at 5 01 42 pm](https://f.cloud.github.com/assets/674727/1547023/b6c33bda-4d92-11e3-8c0e-4161917f7275.png)