Updates documentation about Subscription enum types
Updates documentation about Subscription enum types

taojack/DZNPhotoPickerController,topfreegames/TFGPhotoPickerController,imjerrybao/DZNPhotoPickerController,taojack/DZNPhotoPickerController,dredenba/DZNPhotoPickerController,imjerrybao/DZNPhotoPickerController,dennislysenko/DZNPhotoPickerController,jonesgithub/DZNPhotoPickerController,ahbou/DZNPhotoPickerController,taojack/DZNPhotoPickerController,jonesgithub/DZNPhotoPickerController,imjerrybao/DZNPhotoPickerController,jonesgithub/DZNPhotoPickerController,jonesgithub/DZNPhotoPickerController,lichuanjun/DZNPhotoPickerController,dzenbot/DZNPhotoPickerController,taojack/DZNPhotoPickerController,ndnguru/DZNPhotoPickerController,imjerrybao/DZNPhotoPickerController