[Feature Request] InventoryData to ini or yaml

[doovemax]

hi this package have the feature what is InventoryData to yaml or ini ,json

[jiping-s]

@doovemax it now supports json marshaling and unmarshaling, see https://github.com/relex/aini/blob/master/marshal_test.go due to references, only the entire inventory can be marshalled, not individual groups or hosts.