add a feature: when run install program you can skip partition

by use parameter -p or --skip-partition.

	modified:   main/setup
	modified:   operation/configure_fstab.sh
	modified:   text/ri_main.py

operation/configure_fstab.sh

@@ -73,7 +73,7 @@ configure_fstab ()
 	# other device set 0.
 	case $fs_type in
 		ext2|ext3|ext4|reiserfs) 
-			[ -z "$fs_mntops" ] && fs_mntops="acl" 
+			[ -z "$fs_mntops" ] && fs_mntops="acl,data=writeback" 
 			;;
 		swap)
 			[ -z "$fs_mntops" ] && fs_mntops="defaults"