Ports ambition system. (#4142)

Ports the ambition system from bay that lets antags set the ambition for themselves that displays at round end. Has no effect on the round. And removes a clown check.

code/datums/mind.dm

@@ -69,6 +69,7 @@
 	//put this here for easier tracking ingame
 	var/datum/money_account/initial_account
 
+	var/ambitions
 
 /datum/mind/New(var/key)
 	src.key = key
@@ -114,6 +115,9 @@
 	var/output = "<B>[current.real_name]'s Memory</B><HR>"
 	output += memory
 
+	if(ambitions)
+		output += "<HR><B>Ambitions:</B> [ambitions]<br>"
+	
 	if(objectives.len>0)
 		output += "<HR><B>Objectives:</B>"
 
@@ -156,6 +160,7 @@
 	else
 		out += "None."
 	out += "<br><a href='?src=\ref[src];obj_add=1'>\[add\]</a>"
+	out += "<b>Ambitions:</b> [ambitions ? ambitions : "None"] <a href='?src=\ref[src];amb_edit=\ref[src]'>\[edit\]</a></br>"
 	usr << browse(out, "window=edit_memory[src]")
 
 /datum/mind/Topic(href, href_list)
@@ -195,6 +200,13 @@
 		if (isnull(new_memo)) return
 		memory = new_memo
 
+	else if (href_list["amb_edit"])
+		var/new_ambition = input("Enter a new ambition", "Memory",src.ambitions) as null|message
+		if(isnull(new_ambition))
+			return
+		src.ambitions = sanitize(new_ambition)
+		src.current << "<span class='warning'>Your ambitions have been changed by higher powers, they are now: [src.ambitions]</span>"
+	
 	else if (href_list["obj_edit"] || href_list["obj_add"])
 		var/datum/objective/objective
 		var/objective_pos