Is there a reliable version history list out there?

One that tells what was changed with each patch.

This maybe can help, it's not saying what patch gave the story, but there are dates
http://maplf.tumblr.com/tagged/translations

Also at the rate GMS is, it's unlikely anyone would do now a site or use a forum to put the historys of maple.

We have our very own timelines info http://www.southperry.net/timeline.php but it doesn't give version numbers and it stopped being updated a while back.

The Maple Wiki has major patches since Big Bang: http://maplestory.wikia.com/wiki/Availability