There is 'hacked' go-ethereum library.
This package is modified and configured best way to use whisper protocol for native go-lang applications.
/server.go
Added fmt.Println for each log to get logs info in main go-app.
(Should be removed when we will have logs handler inside main app)
External dependency from gopkg.in is transferred inside library root cause of broken original namespace and import config.
/peer.go
fixed broken import of set.v0
/whisper.go
fixed broken dependency (set.v0) line 65,95,118,123 - fixed p2p.Protocol method inside Whisper struct to be able to use outside go-ethereum added fmt.PrintLn for some logs.
p2p server do not start whisper sub-protocol automaticaly, so you need to start it manually.