Initial revision
v0.20
captcha.php move from `modules/captcha` to `images`
support XCL user registration form

一般設定に「ユーザーモジュール:ユーザー登録画面での CAPTCHA 認証」を追加 (LEGACY_BASE_VERSION > '2.2.2.3' で有効)
edit admin help
fix browser's cache problem
support "Legacy.Event.RegistUser.SetValidators"
source code format
source code format