Add styleguide with KSS

This pull request adds a new route called `/styleguide`. There the scss files get parsed via KSS and returns information needed for the styleguide. The styleguide is styled like the bootstrap documentation.

![bildschirmfoto 2014-11-22 um 11 10 14](https://cloud.githubusercontent.com/assets/5362483/5153756/35daef4c-7238-11e4-8615-00fe65321b08.PNG)