Partial support for xfs_dir2 series.
Add sort routine for xfs_sort.
Remove unused header.
Add error reporting routines.
Updating makefile.
A banch of new files.
kmem.h/kmem.c

Finshied work in userspace.
Still a lot to be done in Win32.
xfsd_mount support.
Adding trans headers and define do_shutdown
Using xfsd_trans to deal with transactions.