Merge pull request #8 from dockercn/develop

使用 LedisDB 重写服务
Merge pull request #10 from dockercn/develop

使用全局 Hash 存储方案改写数据存储
Update README.md
Merge pull request #12 from Beckham007/patch-1

Update README.md
add markdown pkg to deal with crontab
Merge branch 'master' into develop
delete ledis