put manpage in section 1

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
use getopt for option parsing

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
allow specifying package groups

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
change --unowned to --unowned-files

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
bump version to 1.0

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>