Makes emotes case insensitive (#4386)

Also prevents unconscious emoting

code/datums/Emote_system/emote.dm

@@ -103,6 +103,8 @@ VampyrBytes
 /datum/emote/proc/prevented(var/mob/user)
 	if(user.stat == DEAD)
 		return "you are dead"
+	if(user.stat == UNCONSCIOUS)
+		return "you are unconscious"
 	if(restrained && user.restrained())
 		return "you are restrained"
 

code/datums/Emote_system/emote_handler.dm

@@ -16,7 +16,7 @@
 			var/datum/emote/found = searchTree(emote)
 			if(found)
 				for(var/command in found.commands)
-					commands[command] = found
+					commands[lowertext(command)] = found
 				found.addVerbs(owner)