-added underslung/attached GLs to AI inventory and enabled AI to use them :)

-rewrote the AI sniper code to take advantage of readying weapons.  Added new SNIPER order for soldiers that's assigned when a soldier has a sniper rifle (80% chance) or a scope (40% chance).
-spreadsheet update

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@216 3b4a5df2-a311-0410-b5c6-a8a6f20db521

TacticalAI/ai.h

@@ -95,6 +95,7 @@ typedef enum
 	AI_ACTION_END_COWER_AND_MOVE,	// sort of dummy value, special for civilians who are to go somewhere at end of battle
 	AI_ACTION_TRAVERSE_DOWN,			// move down a level
 	AI_ACTION_OFFER_SURRENDER,		// offer surrender to the player
+	AI_ACTION_RAISE_GUN,
 } ActionType;