Package does not support Kazakh language

[xalidevxx]

Please, add Kazakh language.

Code example:

   switch (code) {
        case 'en':
          timeago.setLocaleMessages('en', timeago.EnMessages());
          break;
        case 'ru':
          timeago.setLocaleMessages('ru', timeago.RuMessages());
          break;
        case 'kk':
          // FIXME: does not support Kazahkstan language
          timeago.setLocaleMessages('kk', timeago.KzMessages());
          break;
        default:
          timeago.setLocaleMessages('ru', timeago.RuMessages());
          break;
      }