Fortifying/garrisoning province features

[Michael Gladius]

In the original game, it was possible to fortify camps with towers, and it'd be nice if the same could be done to farms, villages, mosques, etc. in the new game. There wouldn't be walls, but they'd have towers. Same with bridges and river crossings.

Same with garrisoning- placing one unit into the town as a garrison (without a marshall) would help protect from raids. When an attack begins, it'd be like attacking an encamped army.