style.css: Don't use webkit font smoothing

Don't use this, it's making the problem worse:
    http://www.usabilitypost.com/2012/11/05/stop-fixing-font-smoothing/
style.css: Fix unmatched squiggly bracket
style.css: Remove another WebKit font smoothing
style.css: Convert font sizes to rem units

Setting a size of 62.5% on the root element (html) makes all text
equivelent to 10px (16 x 0.625 = 10), and rem's are relative to the
root element's size, so we can say 1.4rem to mean 14px, etc.