.emacs: don't rasterize Unicode characters

Upgrade to Mac OS X "Mavericks" (10.9.1) resulted in Emacs using
ugly font for Cyrillic letters. This commit fixes the problem.

Kudos to "acfoltzer", who published solution at stackoverflow.com
[http://j.mp/1jxmsM8].

Before: http://j.mp/1bqbW1c (PNG)
After:  http://j.mp/1bqdkAY