small update 0414

1 The difficulty of early-stage nightmare waves has been slightly reduced.
2 The tooltip descriptions for attributes like Defense and Power in the character stat panel have more detailed info.
3 After learning Level 2 Magic, spear magic skill will apply an additional "Last Stand" effect: Halves parry cost and can't be knocked down during combat.
4 After learning Level 2 Magic, heavy weapon magic skill will apply an additional "Berserk" effect: Halves incoming damage and can't be knocked down during combat.