Removed font "fix" that worsen readability

`-webkit-font-smoothing: antialiased;` on the entire document is an abuse of the property, it worsens the readability of body text considerably.

Example: http://imgur.com/I12Ff (Chrome/OSX)

Argument: http://www.usabilitypost.com/2012/11/05/stop-fixing-font-smoothing/