add *Fluent.Shutdown() cancel reconnect and close connection.
add fluent.NewPackedForwardObject. creates a MessagePack 'PackedForward' object.
add fluent/server.go like in_forward decorder functions
add fluent.NewForwardObject. creates a MessagePack 'Forward' object.
refactoring tests
add in-forward-benchmarkd. simple in_forward benchmark daemon.