(work in progress)
- Pass all dependencies via constructor
- Encapsulate command handling more (e.g. split CommandHandler with new CommandMapper)
- Add help command to all base commands at one central point
See AccountsCommand or HelpCommand for an example of the advantages - all necessary functions come from CommandService; objects aren't retrieved through a singleton getInstance() method anymore
- Fix bugs in behavior (wrong labels being shown for help)
- Change order of labels and arguments in FoundCommandResult constructors
- Move FoundResultStatus enum to its own class
- Create test class for HelpProvider
