Added Category matching for Skill level and Weapon Damage bonuses

[crnormand]

Looking at #81, I thought I could add a criteria to match against the categories. I was able to add it for Skill bonuses and Weapon Bonuses, but was uncertain how to handle Spell bonuses. I am uncertain what 'mMatchType' is, and how adding a category criteria would affect getKey() and the XML read/write methods. So i left that alone for the moment.

But it works for Skills (and techniques) and Weapons bonuses. You can make "quick" Talents for skills by selecting "whos name is anything" and "category is" and then entering a category (e.g. "Animal") and all skills with that category will gain the bonus.

You can also make a quick "Striking ST" kind of bonus by creating a WeaponBonus and set "whos required skill name is anything" and "category is" "Melee weapon". All melee weapons will now get the bonus damage.

Unfortunately, the OP requested the ability specifically for Spells... so I will continue to investigate.

Oh, and this seems to be directly on point for #35

[crnormand]

This might also work for #46. You would have to add a particular category to the weapon, and then use this feature to only apply the weapon bonus to that category.