Advertisement label in features containers

- [new] Features container MPU is scaled down on tablet to fit the grid
- [new] Show adslot label everywhere, except in the top banner slot
- [new] Features container show 11 items by default

## Tablet

![screen shot 2014-03-10 at 16 50 14](https://f.cloud.github.com/assets/85783/2376494/50958f94-a877-11e3-8d75-bdcecc4454bc.PNG)


## Desktop

![screen shot 2014-03-10 at 16 50 03](https://f.cloud.github.com/assets/85783/2376489/4af7997e-a877-11e3-8f1f-e7e5a6d4a48a.PNG)


![ad-front](https://f.cloud.github.com/assets/85783/2384454/f0a87d1c-a90c-11e3-9126-8f9f52472493.gif)

![ad-article](https://f.cloud.github.com/assets/85783/2384456/f328842e-a90c-11e3-9f2f-1186ee724899.gif)


![ ](http://media.giphy.com/media/F89y1TOYQLPAQ/giphy.gif)