small combat pass

- update monster and player stats to use new Weapon Defense and Attack
classes.
- split sword skill in separate attack and defense values.
- Weapon Comparison Table rules added. Compare weapon classes to
establish roll bonus.
- improved Overpower check so a malus in skill disables Overpower.
- added defensive skill bonus on player defense.
- Changed Condition skill, is now ConstitutionX2 and EnduranceX1.
- Defensive sword skill is DexX2, AgiX1.
- Fixed point allocation on Constitution.
- bonuses separately calculated for both attack and defense skills.
- added more stuff on character screen, preliminary work on weapon
stats. Only skill levels and A/D values currently used.