Create ko.json

Translate to Korean language,
.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	package.json
Translate 40%
Translate 60%
Merge remote-tracking branch 'upstream/master'
Translate 90%
Merge remote-tracking branch 'upstream/master' into korean

Conflicts:
	languages/languages.json
Merge remote-tracking branch 'upstream/master' into korean
Merge pull request #132 from kcyang/korean

Korean