AP weapons

[gamegeek2]

Because Gamegeek wanted Kopis to be better against unarmoured units. I did not like this change, though.

That's wrong, it's because I saw no reason to keep their armor-piercing capabilities. Also, it's led to far better balance in fights between heavy cavalry; we don't have Lonchophoroi unrealistically slaughtering Brihentin thanks to AP weaponry; a kopis IRL would do little better, if not worse, against mail than a straight sword.