Bug/korean encoding

alias 'ks_c_5601-1987' encoding to CP949

Here's my spec run, didn't break anything:
![screen shot 2013-07-11 at 7 36 55 pm](https://f.cloud.github.com/assets/2741356/786065/013c7280-ea9c-11e2-98d7-bc3fe749a69d.png)