introduced a new utility header
introduced more innovative naming in class basic_interface
introduced more innovative naming in class basic_command
introduced more innovative naming in class basic_argument
introduced more innovative naming in class option
added conversion operator for style_flags to class basic_command
introduced new mechanism for special treatment of arguments
updated flag-option.hh
derived class operand from class basic_argument
updated function match() of class flag_option
removed bug in class command_line
updated style conformity in class operand
updated style handling and moved style.hh to public include folder
updated implementation of class operand