started specific css

+ started specific css
+ added cool transition mixin for hover and keyboard nav
+ added box-sizing reset : see
http://www.paulirish.com/2012/box-sizing-border-box-ftw/
+ added rem based font sizing : see
http://seesparkbox.com/foundry/scss_rem_mixin_now_with_a_better_fallback
- moved some files around