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)

code/modules/mob/login.dm

@@ -41,12 +41,14 @@
 	update_client_colour()
 	update_mouse_pointer()
 	if(client)
-		client.click_intercept = null
-
 		client.change_view(CONFIG_GET(string/default_view)) // Resets the client.view in case it was changed.
 
 		if(client.player_details.player_actions.len)
 			for(var/datum/action/A in client.player_details.player_actions)
 				A.Grant(src)
 
+		for(var/foo in client.player_details.post_login_callbacks)
+			var/datum/callback/CB = foo
+			CB.Invoke()
+
 	log_message("Client [key_name(src)] has taken ownership of mob [src]([src.type])", LOG_OWNERSHIP)

code/modules/mob/logout.dm

@@ -9,4 +9,9 @@
 	if(loc)
 		loc.on_log(FALSE)
 
+	if(client)
+		for(var/foo in client.player_details.post_logout_callbacks)
+			var/datum/callback/CB = foo
+			CB.Invoke()
+
 	return TRUE