Log Message:
Update imhangul to 2.0.0.
approved by minskim@ (and thanks for English translation from a Korean NEWS).

2.0.0
  * imhangul-2.0 is for Gtk+-2.0
  * #315984 A backspace doesn't delete a character in Firefox 4.0
  * #315980 A keyboard name is not translated because of a discrepency
     between imhangul and libhangul
  * #306326 Add a configuration option to designate a key to switch
     between Korean and English
    - Set a string recognized by gtk_accelerator_parse() in imhangul.conf
  * Fix a bug in the simple input method in Gtk
    - Show the "preedit string" when invoked with Ctrl+Shift+u

0.9.16
  * Support 2-Set old Korean, 3-Set old Korean, and Ahnmatae keyboards
  * Allow Korean input with a non-qwerty US system keyboard

0.9.15
  * Support a Roman keyboard (requires libhangul>=0.0.10)
  * Bug fix: #305211 A strange behavior of a backspace in a gtkhtml window