pactrans: bail on empty transactions

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
pacinfo: print groups before installation status

Matches pacman's -[QS]s output.

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
pacinfo: add md5/sha256 sums

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

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
paclog: die on unknown options

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

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

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
paclog: add experimental --installed option

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