BEMINFO-784 — Рефакторинг шапки примеров

![2014-12-29_1647](https://cloud.githubusercontent.com/assets/1333220/5569077/6782b4e4-8f7a-11e4-9828-3ac12b4cf499.png)

In best practices, background-position must be `top left` or `0 0` and make position by use css properties `left,top, etc `