Save dialog directories? + crash

[MF-]

I noticed that my save list is getting substantially large and decided to make directories in ~/.factorio/saves and put older saves in them.
The directories show up in the save/load dialog.. clicking them is not a good idea.

Suggestion: It would be nice if you introduced a string field "world name" and then allowed the user to group the saves by the world names. Or show only the two most recent saves from each world.

EDIT: Even though "invalid" saves cause a segfault, I guess this is mostly a feature request.

[cube]

Ok, so after long time with no reaction: The game no longer segfaults (in 0.7.1) and this isn't really a bug