We should add a configuration file where to specify the following things: - if the db should be created or not. If it's created it should always be used, otherwise the program won't try to read and save anything on the disk; - what color scheme should be used. The user can either specify a list of colors in a specific section or use one of the default color schemes. If the color scheme is e.g. 'custom', the list of colors specified by the user will be used. - what reporter should be used. The user can specify one (or maybe even more) of the reporters (the -q option should be turned in a reporter too). - possibly other things (e.g. default options, filters).