Use "keycode Linux_keycode = X11_keysym" format

Delete non-Linux keyboard compatibility.

These are tested for both PC and Mac. Using showkey and xev

Notably:

  Hangul = Eisuu-on-mac-keyboard
  Hangul_Hanja = Kana/kana -on-mac-keyboard

BUG=http://code.google.com/p/ibus/issues/detail?id=1724
TEST=data/keymaps/keycode.py

Review URL: https://codereview.appspot.com/106250045
Patch from Osamu Aoki <osamu@debian.org>.