Added LevelEnum for arg parsing. Added a method to create a Argument parsing namespace.
Arg parsing for the credentials argument.
Arg parsing for all the other arguments.
Renamed constant for default backup file name.
Refactor argument parsing in ArgParser class.
Cleanup. Import argument. ArgParserTest improvement.
private fields to constants in test classes. Coverage for the logging switch. Common compiler version for profiles.
Version 1.1. fix #11.