2005/02/19	ver.1.5e
	1. bug fix in processing list
2005/02/15	ver.1.5d
	1. changed some misleading messages
	2. -t option is added
	3. made codes simpler
2005/02/02	ver.1.5c
	1. fixed error message in case of permission error
2005/01/30	ver.1.5b
	1. safty in creating directory.
2005/01/25	ver.1.5a
	1. bug fix of previous version
2005/01/18	ver.1.5
	1. discarded -x option,
		xlist file is combined with path list file
	2. added -s option: safe option
	3. added uid gid option in path list file
	4. safty when interrupted
	5. made codes simpler and cleaner
	6. bug fix of previous version
2004/08/15	ver.1.4b
	1.  blank lines are allowed in path list file
2003/09/27	ver.1.4
	1. -x option	# exception list of files to be copied
2003/01/18	ver.1.3
	1. make codes simple
2002/12/25	ver.1.2
	1. Bug fix that comes if source dir is unwritable.
	2. Modified time of directory is also copied.