Overpowering

- changed again how criticals are calculated.
- added to message log the basic attack/defense skills to use in
calculations for criticals (so before bonus/malus are applied)
- added Overpower (automatic) move, player-only, triggering if skill 80+
and if there's a difference of +9 in the attack index. Overpower trigger
another attack.
- Initiative is only rolled once for each combat sequence
- initiative list, passing references instead of copies (not biggie)
- added strong defaults to player if skipping character creation, to
test Overpower move.
- on map regen, the player restores health to the actual max