Separate styles into 2 files  

When I try to use vertical-timeline as a bower component it breaks my page layout. 
In style.css (style.scss) we have defined height for <header> and some styles for font.

Of course it can be overwritten but I separate style into two files: 
timeline style (style.css) and style required for nice looking demo page (demo.css).

Standalone timeline still looks fine.

![vertical-timeline](https://cloud.githubusercontent.com/assets/1399832/4772775/9c9fba04-5b9b-11e4-946f-cc8bf6c23408.png)