Add a new target git-show-ahead-of-master, which does what
git-show-pushable did up to now: List all repos where the currently
checked-out branch is ahead of origin/master.
git-show-pushable now shows repos that have their checked-out branch
ahead of their respective upstream branches. Which is truer to what
the target's name suggests.
Signed-off-by: Jan Lindemann <jan@janware.com>
Jan Lindemann
38f13e922a