RUG re-design 2014

- [x] Added SASS support to jekyll via [jekyll-sass](https://github.com/noct/jekyll-sass)
- [x] Extracted GA code to partial
- [x] Removed old css code
- [x] Started ignoring .sass-cache folder in .gitignore
- [x] Added HTML5 metadata
- [ ] Implemented header design
- [ ] Implemented footer design
- [ ] Implemented single-page desing
- [ ] Implemented front-page design