Remove unnecessary virtual specifiers
combat events & more

Creature:onAreaCombat
Creature:onTargetCombat
Player:onGainSkillTries now runs when using magic
Merge pull request #1046 from dalkon/master

combat events & more
Add 10 new item attributes

The following item attributes can now be customized for items: name,
article, pluralname, weight, attack, defense, extradefense, armor,
hitchance and shootrange.