fix so pathnames can contain spaces added db_unregister_pkgv
added support for upgrades
moved list_remove to libutil.sh and unregistering pkgv to libdb.sh
fix so pathnames can contain spaces
moved list_uninstall added list_subtract fixed so pathnames can contain spaces
use init_tmpdir from libutil.sh
use init_tmpdir
added init_tmpdir
added support for using an alternative index