*  Add panic if backgroundWorker fails

*  Use log.Panicf instead of panic

* adapt to new hive.go version

* upgrade hive.go

* use store backed sequence

* add option to use in-memory database

* address review comments

*  fix linter warnings

*  fix import order

* normalize global plugin vars

* throw the dog a bone

* remove unused logger in drng web api endpoint

* replace 'transaction' with 'message' in message layer pkg

* remove more occurrences of 'transaction'

* fixes ReferencedMessageId() returning approverMessageId

* renames ApprovingMessageId to ApproverMessageId

* use ApproverMessageId in deleteFureCone()

* refactors message pkg

* renames payloadId in Message to contentId

* finalize comment on what a Message is

* refactors additional message sub pkgs

* renames 'transaction' to 'message' in gossip plugin

* removes occurrences of 'transaction' in graph plugin

* removes occurrences of 'transaction' in metrics plugin

* refactors dashboard plugin for messages

* removes further occurrences where tx is used instead of msg

* fixes TestMessageRequest in manager_test.go

* go fmt explorer_routes.go

* fix review comments

* fix Errorf order

* throw around bones

* Feat: refactored message + started to add tests

* Refactor: go mod tidy

* Refactor: continued to refactor message

* Feat: updated to last hive.go + added Signature() methid

* Feat: go mod tidy

* Feat: added mutex to the signature write in Bytes()

* Fix: fixed Signature method

* Feat: refactored message methods

* Feat: refactored output

* Fix: fixed signature mismatch in tangle factory methods

* Refactor: go mod tidy

* Feat: added solditification logic to value tangle

* Feat: fixed some code related to objectstorage factories

* Feat: model refactor

* Fix: fixed a bug in the models of the valuetangle

* Feat: refactored storageprefix framework

* Feat: refactored some code

* Refactor: additional refactor in OS logic

* Refactor: refactored MissingPayload model

* Refactor: refactored further models

* Feat: refactored message + started to add tests

* Refactor: go mod tidy

* Refactor: continued to refactor message

* Feat: updated to last hive.go + added Signature() methid

* Feat: go mod tidy

* Feat: added mutex to the signature write in Bytes()

* Fix: fixed Signature method

* Feat: refactored message methods

* Added plugin structure and DB sequence number. WIP

* First version of transaction factory and builders for payloads #275

* 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 to merged changes

* Rename to MessageFactory

* Use local identity and tip selector

* Rename package

* Add tests

* Changed BuildMessage to receive an interface value instead of pointer

* Refactoring and comments

* Fix: fixed issues due to refactor

* Refactor: refactored the code

* Refactor: removed unnecessary messagefactory plugin

* Refactor: cleaned up code

* Feat: made spammer use messagefactory

* Refactor: refactored method name and docs

* Refactor: additional refactor

* Refactor: go mod tidy

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

* Feat: started reworking output model

* Refactor: refactored some of the model

* Refactor: started to refactor some additional models

* Refactor: started to refactor message layer

* Refactor: still refactoring :/

* Refactor: refactored some more

* Refactor: some error messages are gone YAY

* Refactor: refactor complete