Adds new disability, new chemical recipes. (#4727)

Adds a new special disability, love. Love works like monophobia, except that it specifically targets a single living mob and the owner must stay within the presence of that mob. The owner is also more susceptible to that mob's will.

Adds four new chemicals, with the potential for more:

1: Sovereign Glue
When applied to an object, the sovereign glue makes that object sticky. Anyone who picks it up cannot put it back down or have it taken from them unless the hand is severed or the glue removed. May consider other applications upon suggestion.

2: Universal solvent
Specifically counteracts sovereign glue. If more mundane applications can be suggested, this would probably not be a secret chemical. I can't think of any right now however.

3: Philter of Love
When ingested, the subject gains the love disability if they do not already have it.

4: Shapesand
Shapesand can be applied to any object. A counterfeit is created that looks and feels exactly like that item. If someone attempts to use the counterfeit, it collapses into sand (Specifically, in afterattack()).

code/datums/brain_damage/special_ed.dm

@@ -90,4 +90,95 @@
 		new /obj/effect/overlay/temp/bluespace_fissure(get_turf(linked_to))
 		user.forceMove(get_turf(linked_to))
 		user.visible_message("<span class='warning'>[user] [slip_in_message].</span>", ignored_mob = user)
-		user.visible_message("<span class='warning'>[user] [slip_out_message].</span>", "<span class='notice'>...and find your way to the other side.</span>")
+		user.visible_message("<span class='warning'>[user] [slip_out_message].</span>", "<span class='notice'>...and find your way to the other side.</span>")
+
+/datum/brain_trauma/special/love
+	name = "Hyper-dependency"
+	desc = "Patient feels lovesick and is emotionally dependent to a specific person."
+	scan_desc = "severe dependency"
+	gain_text = ""
+	lose_text = "<span class='notice'>You feel love leave your heart.</span>"
+	var/stress = 0
+	var/datum/weakref/beloved = null
+	cure_type = CURE_HYPNOSIS
+
+/datum/brain_trauma/special/love/on_gain()
+	..()
+	for(var/mob/living/L in view(7,owner))
+		if(L != owner)
+			beloved = L
+			break
+	if(beloved)
+		to_chat(owner, "<span class='notice'>You can't help but love [beloved]. You can't bear to be apart from them, and would do anything they say.</span>")
+
+	else
+		to_chat(owner, "<span class='notice'>You feel a brief burst of passion, but it quickly fades.</span>")
+		qdel()
+
+/datum/brain_trauma/special/love/on_life()
+	..()
+	if(check_alone())
+		stress = min(stress + 0.5, 100)
+		if(stress > 10 && (prob(10)))
+			stress_reaction()
+	else
+		stress = max(0, stress - 4)
+		if(prob(5) && stress > 0)
+			var/mushy = pick("You feel so good when [beloved] is with you.","You can't believe you ever lived without [beloved].","You'd do anything for [beloved].","[beloved] makes everything better.","You can never let [beloved] leave again.")
+			to_chat(owner, "<span class='notice'>[mushy]</span>")
+
+/datum/brain_trauma/special/love/proc/check_alone()
+	if(owner.disabilities & BLIND)
+		return TRUE
+
+	for(var/mob/living/L in view(owner, 7))
+		if(L == beloved)
+			return FALSE
+
+	return TRUE
+
+/datum/brain_trauma/special/love/proc/stress_reaction()
+	if(owner.stat != CONSCIOUS)
+		return
+
+	var/high_stress = (stress > 60) //things get psychosomatic from here on
+	switch(rand(1,6))
+		if(1)
+			if(!high_stress)
+				to_chat(owner, "<span class='warning'>You feel sick...</span>")
+			else
+				to_chat(owner, "<span class='warning'>You feel really sick at the thought of being seperated from [beloved]!</span>")
+			addtimer(CALLBACK(owner, /mob/living/carbon.proc/vomit, high_stress), 50) //blood vomit if high stress
+		if(2)
+			if(!high_stress)
+				to_chat(owner, "<span class='warning'>You can't stop shaking...</span>")
+				owner.dizziness += 20
+				owner.confused += 20
+				owner.Jitter(20)
+			else
+				to_chat(owner, "<span class='warning'>You feel weak and scared! If only [beloved] was here!</span>")
+				owner.dizziness += 20
+				owner.confused += 20
+				owner.Jitter(20)
+				owner.adjustHalLoss(50)
+
+		if(3, 4)
+			if(!high_stress)
+				to_chat(owner, "<span class='warning'>You feel really lonely without [beloved]...</span>")
+			else
+				to_chat(owner, "<span class='warning'>You're going mad with loneliness! You need [beloved]!</span>")
+				owner.hallucination += 20
+
+		if(5)
+			if(!high_stress)
+				to_chat(owner, "<span class='warning'>Your heart skips a beat. Oh, [beloved]!</span>")
+				owner.adjustOxyLoss(8)
+			else
+				if(prob(15) && ishuman(owner))
+					var/mob/living/carbon/human/H = owner
+					var/obj/item/organ/heart/heart = H.internal_organs_by_name["heart"]
+					heart.take_damage(heart.min_bruised_damage)
+					to_chat(H, "<span class='userdanger'>You feel a stabbing pain in your heart!</span>")
+				else
+					to_chat(owner, "<span class='userdanger'>You feel your heart lurching in your chest... Oh, [beloved]!</span>")
+					owner.adjustOxyLoss(8)