v0.3.0c: trap refactor pt2, traps completely changed to work based on instantiable trap objects instead of terrain types

This makes the trap system far more extendable.

src/com/shatteredpixel/shatteredpixeldungeon/actors/Char.java

@@ -403,8 +403,11 @@ public abstract class Char extends Actor {
 		if (Dungeon.level.map[pos] == Terrain.OPEN_DOOR) {
 			Door.leave( pos );
 		}
-		
+
+		Actor.freeCell(pos);
 		pos = step;
+		Actor.occupyCell( this );
+
 		
 		if (flying && Dungeon.level.map[pos] == Terrain.DOOR) {
 			Door.enter( pos );