Add new chemicals (#5168)

Adds new drugs:
-Red Nightshade: a drug that induce a berserk-like status, you see only red, can smash windows, stuns go away slower and etc
-Paxazide: a medicine that induces pacifism on the target, like the mutation
-Spectrocybin: a hallucinogenic that has a small chance of giving a glipse of the other hidden to mere mortals, can be found in a mushroom variety

Adds a new secret chem:
-Bottled Lightning: causes a tesla zap when in contact with someone's blood or when splashed on the ground

Also removes some broken/unused plants.

code/game/objects/structures/window.dm

@@ -184,7 +184,7 @@
 
 		if (istype(usr,/mob/living/carbon/human))
 			var/mob/living/carbon/human/H = usr
-			if(H.species.can_shred(H))
+			if(H.species.can_shred(H) || (H.is_berserk()))
 				attack_generic(H,25)
 				return