Leftovers: Updated to v1.4

Just a quick note: The current version of the Leftovers PDF available online has been updated to v1.4. You may notice that v1.3, the version I handed out at Gamex, was skipped altogether; that's because I did some more revising as a result of the playtest there before I'd ever gotten around to uploading v1.3 in the first place.

Anyway, quite a bit's changed; a list of revisions is available at the link above.