Commit more notes, and the modfile.

Updated notes.  Updated city and turn files.

Committing all the notes.

Updated AI start, re-generated city files, updated modfile and desktop copy file.

Current city files.  Other than the pre-existing 69 cities, this is potentially
release-ready.

Also update the TurnEvents file to the most recent one from GearCity for
Europe Test, which includes WWI and other conflicts.  This was patched some time
in the past year.

Add city images.

Experimenting with custom region names but not sure how to link 'em yet.

Backing up the files prior to attempting to add city logos.

This should generally be re-creatable from the database, but the ModFile and other non-city files are a bit more fragile.