Improve disk manage tools.
Release 0.68RC6, change version to 0.68RC7
fix the SSH problem of the 0.68RC5 and little fix of the setupfreenas.sh
Fix bug in disk_umount function. Unmount disk before using fsck.
Fix display error after install on 2 partition disk.
Fix update problem.
0.68RC5 release, changing version to 0.68RC6
fixed eclusive mapall and maproot option for NFS
Enhance disk management tool page (display note if disk is mounted).
Enhance disk management tool page. Fix some translations.
