Mods that remove 'repair' improvement no longer cause crashes down the line

Archipelago creates water again

By SomeTroglodyte:
- TileSet mods can no longer lock user out
- Obsoleted units replaced in construction queues by Nation-unique upgrades
- Fix exploit allowing promotion with 0 movement
- Fix notifications for pillage loot
- A renamed unit shows that new name in can promote notifications

AbsoluteUnits - Hwach'a, Camel Archer  - By letstalkaboutdune