更新README

简单的项目描述和使用帮助
更新README

简单的项目描述和使用帮助
Merge branch 'master' of https://github.com/12306NgWeb/12306ngweb

Conflicts:
	README.md
Update README.md
Merge branch 'master' of https://github.com/RadiumXie/12306ngweb