Integrate uniform node identity (#304)

* Move marshalutil to hive.go

* Refactor existing code (before binary) to use new hive.go/identity #282

* Adjust binary code to use hive.go/identity and remove signature/ed25519 #282

* Adjust moved files from merge to use hive.go/marshalutil

* Adjust moved files from merge to use hive.go/identity and hive.go/crypto

* Adjust for changes in hive.go

* Fix: fixed a bug due to refactor

Co-authored-by: Hans Moog <hm@mkjc.net>