Update of v2.688

Update of v2.687-v2.688

< single player mod >

1. In the town menu, after choosing to go to the market, add the submenu of "talking" or "trading" with the merchants.

2. Talking with the weapon and armor merchants in the towns can strengthen your equipment.

3. Weapon and armor merchants can help players to strengthen equipment, and high-level reinforcement requires the "engineer" skills in player's team.

4. Strengthening requires money and various materials, which can be put in the supply or in the your baggage. The material in the supply will be used first when strengthening.

< multiplayer mod>

1. The player's weapon will no longer be damaged, but its power will decrease as the durability decreases. Reduce power from durability below 50%.