Merge branch 'develop' into feature/dynamic_dsn
替MysqlStorage 提供外部config 或是也可以依賴建構時注入連線參數
Merge branch 'feature/dynamic_dsn' into develop
Merge branch 'develop'
Merge pull request #8 from syhlion/master

提供預設config 也可以在建構時注入連線參數