bits comment and fixed warnings
added failWithMsgNo
added update state to QUIT command and constructor Mailbox injection
dummy mailbox impl. Authentification noew has getMailbox() which calls the mailboximpl constructor. mailbox constructor gets authentificaiton to get the access. mailbox added quitAndSaveChanges(). added edges cases in CommandParser
inside account 1 storage: renamed emails to their UIDLs. inserted some content. removes X-Mozilla-Headers. updated messeageID field in their headers
locking is TODO
renamed users because emails would have @ twice otherwise
added debug printlns at ServerInput. needed to see which commands thunderbird sends