Implement global loot system Fixes #619

This should allow us to emulate lives global tables

The options available to filter tables are min_level, max_level, race,
rare, raid, race, class, bodytype, and zone.

race, class, bodytype, and zone are a pipe | separated list of IDs

zone/spawn2.cpp

@@ -236,6 +236,8 @@ bool Spawn2::Process() {
 
 		npcthis = npc;
 		npc->AddLootTable();
+		if (npc->DropsGlobalLoot())
+			npc->CheckGlobalLootTables();
 		npc->SetSp2(spawngroup_id_);
 		npc->SaveGuardPointAnim(anim);
 		npc->SetAppearance((EmuAppearance)anim);