sashiko v.0.2.4 [new sashiko review mode]

Hello!

I just released a new sashiko version with a relatively big feature:
new "$sashiko review [sha1..sha2]" mode, which is designed to be _the mode_
most developers should use for the local development. It should be overall
functional, but I'm pretty sure there is a lot to improve and fix. Also
"$sashiko init" for the initial setup, which I think we can make more
interactive and user-friendly.

Any feedback, bug reports and/or fixups and ideas are highly welcome!

Thanks!