Unit Regeneration in strongholds

[salahusama]

We should figure out a way to add units to the game. So fat the idea is to spawn units in each stronghold owned by players every x amount of time.

How many we spawn could be fixed, or it could depend on the number of soldiers in that castle, or the number of castles owned by the player, etc.

We might also want to spawn units in strongholds not owned by either player. That gives some kind of risk to attacking a stronghold instead of just getting there first. It also gives players the incentive to get more castles early on. If left alone, an empty castle may be very difficult to capture. It might be similar to barbarians in the Civilization games.

[salahusama]

Units will generate at a rate of X units every Y seconds based on the stronghold's magnitude. This is only for owned strongholds.