Merge branch 'sy/i18n' of git-gui

* 'sy/i18n' of git-gui:
  git-gui: update Japanese information
  git-gui: update Japanese translation
  git-gui: add Japanese language code
  git-gui: apply po template to Japanese translation
  git-gui: consistently use the same word for "blame" in Japanese
  git-gui: consistently use the same word for "remote" in Japanese

Author: gitster