Feat: Refactor and cleanup some code (#301)

* Feat: refactored the address

* Feat: started adding solidification of transferOutputs

* Feat: cleaned up checker code

* Feat: going to bed - good night world

* Feat: refactored transferoutput package

* Fix: fixed a bug from refactoring

* Refactor: removed old transferoutputmetadata package

* Refactor: started refactoring transfer package

* Refactor: refactored transfer/id package

* Refactor: moved transfer struct to new package

* Refactor: fixed issues after refactor

* Refactor: fixed sth

* Refactor: continued to move files

* Refactor: commit before migration of last refactored files

* Refactor: another refactor before move

* Refactor: refactor test

* Fix: fixed some bugs connected to refactor

* Refactor: continued refactor

* Refactor: fixed some bugs

* Refactor: does it work now?

* Feat: added a method to generate a random transferid

* Feat: rename transfer to transaction

* Refactor: refactor according to new names

* Refactor: continued to refactor transaction package

* Refactor: moved payload id to payload package

* Refactor: moved signatures to transaction package

* Refactor: moved signature to transaction

* Fix: fixed bug due to refactor

* Fix: fixed bugs due to refactor

* Refactor: fixed some bugs after refactor

* Fix: fixed additional bugs

* Fix: bug fix

* Refactor: moved signature to signaturescheme package

* Fix: fixed signatures test

* Fix: fixed bug in tangle

* Fix: fixed payloadmetadata test

* Fix: fixed payload test

* Refactor: moved payloadmetadata to payload package

* Fix: fixed some refactor bugs

* Fix: fixed a bug due to refactor

* Fix: fixed broken test

* Refactor: moved approver to payload package

* Refactor: moved missingpayload to payload package

* Refactor: refactored coloredbalance package

* Fix: fixed bug due to refactor

* Refactor: moved address signaturescheme to address package

* Fix: fixed refactor bug

* Feat: added missing outputs to tangle

* Fix: fixed issues due to refactor

* Refactor: started moving tangle classes to tangle package

* Refactor: moved payloadmetadata to tangle

* Fix: fixed bugs due to refactor

* Refactor: moved TransactionMetadata to tangle package

* Refactor: moved some files to tangle

* Fix: fixed bug due to refactor

* Feat: added TransactionMetadata storage

* Fix: fixed some issues

* Fix: fixed some issues

* Fix: fixed missing release