[新規] 師団名編集の実装
fixed #206

Signed-off-by: nkodama <kodama.naoki@gmail.com>
[整理] Country -> Countries, CountryTag -> Country

Signed-off-by: nkodama <kodama.naoki@gmail.com>
[新規] ランダム指揮官名エディタ実装
fixed #207

Signed-off-by: nkodama <kodama.naoki@gmail.com>