标准业务对象完善
Created by: hotlong
清单参考： https://github.com/steedos/object-server/blob/develop/docs/standard_objects.md
删除
- accounts
- contacts
转换为 yml
- attachments
- permission_shares
- reports
https://github.com/steedos/creator/tree/master/packages/steedos-app-base/models
- tasks
- events
- notes
https://github.com/steedos/creator/tree/9f7ab272e144fb5f7602090cebdb4990c78df8c4/packages/steedos-app-chat 建议放到 chatter 子文件夹中
审批王相关：https://github.com/steedos/creator/tree/master/packages/steedos-app-workflow/models 建议放到 workflow 子文件夹中