lot of things are fixed
switched back to sha1sum
replaced "upgrade" with "update"
fixed bugs when spaces are in paths
$APK_CHKSUM should not be quoted
version 0.9
added support for upgrades (-u)
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