Alien Ruin fix, various cherrypicked upstream fixes

Also adds new buildmode

code/modules/mob/living/carbon/carbon.dm

@@ -142,6 +142,7 @@
 		hud_used.throw_icon.icon_state = "act_throw_on"
 
 /mob/proc/throw_item(atom/target)
+	SEND_SIGNAL(src, COMSIG_MOB_THROW, target)
 	return
 
 /mob/living/carbon/throw_item(atom/target)

code/modules/mob/living/carbon/human/species.dm

@@ -1470,6 +1470,7 @@ GLOBAL_LIST_EMPTY(roundstart_races)
 		log_combat(M, H, "attempted to touch")
 		H.visible_message("<span class='warning'>[M] attempted to touch [H]!</span>")
 		return 0
+	SEND_SIGNAL(M, COMSIG_MOB_ATTACK_HAND, M, H, attacker_style)
 	switch(M.a_intent)
 		if("help")
 			help(M, H, attacker_style)