Streamline ship stats.
- Fishing boat build time from 20 to 15 (5 less than bireme/merchant).
- Quinquereme population from 3 to 5 (biremes have 2, triremes 3)
- Warships get a 2:1 wood to metal cost
- Loot is standardized to 20% of costs, XP to 10% of health, similar to siege engines and structures.
- Fishing boath & Merchant ship have the same resistance as warships but accordingly lower HP, for easier stat comparison.
Patch by: Nescio
Accepted By: borg-, wraitii
Differential Revision: https://code.wildfiregames.com/D2956