Mod: tables

Add: folder_id’ for table ‘data_sources’
Add: table ‘folders’
Mod:  controller of data_source, record
Add: folder logical and controller
Delete: old dashboard management interface
Delete: repeat Promise define
Mod: add-back Promise,set name to 'blueBird'
Merge pull request #54 from slycloud/master

Add: table 'folder', logical, controller  && Delete: old dashboard admin