Revert "replace EUC-KR with its superset CP949, closes #10"

This reverts commit 5590a5b6878186a629f0968c7df33948d0782bb3.
Revert "move EUC-KR tests under CP949 (for #10)"

This reverts commit 95bf484c2d2dbbe7ed57e2639a51df3576ebc699.
Revert "add CP949 test case for #10"

This reverts commit ceecb4a126d5348bfff06c623aa7d30731dbd116.