changes

Xcom1Ruleset: decrease stunbomb power from 87 to 85
	- limit blast radius to 3 tiles
Snakeman: fix graphic when walking away from player
BattlescapeGame: fix proximity grenades behind walls
Map: change color of wounds on rankIcon from red to white
Pathfinding: fix discrepancy in pathPreview
	- when walking downwards through doors
TileEngine: brighten soldiers at night ...
	- proximity grenades explode when door opens on RMB
BattleUnit: remove debug for hit-sounds.