BEMINFO-784 — Рефакторинг шапки примеров

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

I offer to add this color into https://github.com/bem/bem-site-engine/blob/dev/src/blocks/common.blocks/styling/styling.styl