UPDATE Comments in Code

UPDATE Parse for Support Cmd Args

ADD JsonConf for Save an Read json conf file

改配置优先级：环境变量配置覆盖配置文件

支持从系统环境变量加载配置

UPDATE ConfItem.toString

ADD func AddComment

FixedBug:issues1, defaultValue. Add feature issus2, []int conf item

UPDATE GetConfStrByLine and TestConf

ADD func UpdateFile