Fixes bug related to hardlinks not being correctly stored in certain cases, raised in issues #123 and #124. Changes are:
- Changed required BackupPC::XS version from 0.56 to 0.57.
- bin/BackupPC_dump now updates inodeLast for share being backed up.
- bin/BackupPC_refCountUpdate: inodeLast is checked and updated during fsck; needs BackupPC::XS 0.57.
Thanks to @SebastianS90 and others for all the help providing detailed debug information, and testing the fixes.