Add name() & conform to Printable.
Add name() & conform to Printable.

luzefeng/SwiftTask,luzefeng/SwiftTask,ReactKit/SwiftTask,iosyoujian/SwiftTask,ReactKit/SwiftTask,msdgwzhy6/SwiftTask,marinehero/SwiftTask,iosyoujian/SwiftTask,iosyoujian/SwiftTask,marinehero/SwiftTask,marinehero/SwiftTask,marinehero/SwiftTask,msdgwzhy6/SwiftTask,msdgwzhy6/SwiftTask,msdgwzhy6/SwiftTask,luzefeng/SwiftTask,luzefeng/SwiftTask,iosyoujian/SwiftTask,ReactKit/SwiftTask