Updated for elasticsearch 0.90.0 and 0.90.1

First of all, I wanna say thank you guys @chanil1218 and http://cafe.naver.com/korlucene. I had used your Korean analyser for a while and it was awesome.

But elasticsearch was updated to 0.90.x with lucene 4.x, I needed to change some codes for it. I'm sharing this cheerfully.