Message Log & combat

- added extended Message Log (displays 75 lines instead of 15)
- still to-do: context sensitive pop-up
- combat_move_max = total movement points, move_counter = steps walked
in combat turn, cflag_attacks = -10% skill checks (for each attack or
amount of movements)
- for each attack a -10% is applied, so following attacks or defenses
have a penalty (cflag_attacks incremented)
- total movement point/2 = number of steps the monster does to add the
10% action malus, 6/3 = 3 for orcs, 10/2 = 5 for trolls
- for players it's the default 8 max, so 4 steps to flag for penalty
-- combat_null global = allows player to wait/waste 1 mov point by
pressing '.' waiting doesn't add action penalty