2009/01/01 version 0.7.1
- Add "-n" / "--dry-run" option.
- Change return status.(0:normal, 1:run time error, 2:syntax error)
2008/10/09 version 0.7.0
- Print progress message.
- Add "-q/--quiet" option to suppress progress message.
- Change "-?" to "-h"
- More flexible option handling by getopt.
- Conversion becomes cleverer.