add pacutils/log

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

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

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
pacinfo: read targets from stdin

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
add package version to transaction display

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