Better factions and contractors (#6493)

Intent of this PR: make factions actually matter.

How we're going to do this:

Make factions limit job choices.
Make factions have alternative loadouts that override job uniforms
Make factions be visible in the employment records.
Revert existing faction loadout options or put them behind a preference, in favour of new shit.

code/modules/client/preference_setup/general/05_background.dm

@@ -8,7 +8,6 @@
 	S["gen_record"]          >> pref.gen_record
 	S["home_system"]         >> pref.home_system
 	S["citizenship"]         >> pref.citizenship
-	S["faction"]             >> pref.faction
 	S["religion"]            >> pref.religion
 	S["nanotrasen_relation"] >> pref.nanotrasen_relation
 
@@ -18,7 +17,6 @@
 	S["gen_record"]          << pref.gen_record
 	S["home_system"]         << pref.home_system
 	S["citizenship"]         << pref.citizenship
-	S["faction"]             << pref.faction
 	S["religion"]            << pref.religion
 	S["nanotrasen_relation"] << pref.nanotrasen_relation
 
@@ -38,7 +36,6 @@
 				"nt_relation" = "nanotrasen_relation",
 				"home_system",
 				"citizenship",
-				"faction",
 				"religion"
 			),
 			"args" = list("id")
@@ -63,7 +60,6 @@
 			"nt_relation",
 			"home_system",
 			"citizenship",
-			"faction",
 			"religion","id" = 1,
 			"ckey" = 1
 		)
@@ -78,7 +74,6 @@
 		"nt_relation" = pref.nanotrasen_relation,
 		"home_system" = pref.home_system,
 		"citizenship" = pref.citizenship,
-		"faction" = pref.faction,
 		"religion" = pref.religion,
 		"id" = pref.current_character,
 		"ckey" = PREF_CLIENT_CKEY
@@ -89,8 +84,6 @@
 		pref.home_system	= "Unset"
 	if(!pref.citizenship)
 		pref.citizenship	= "None"
-	if(!pref.faction)
-		pref.faction		= "None"
 	if(!pref.religion)
 		pref.religion		= "None"
 
@@ -102,7 +95,6 @@
 		"[current_map.company_name] Relation: <a href='?src=\ref[src];nt_relation=1'>[pref.nanotrasen_relation]</a><br/>",
 		"Home System: <a href='?src=\ref[src];home_system=1'>[pref.home_system]</a><br/>",
 		"Citizenship: <a href='?src=\ref[src];citizenship=1'>[pref.citizenship]</a><br/>",
-		"Faction: <a href='?src=\ref[src];faction=1'>[pref.faction]</a><br/>",
 		"Religion: <a href='?src=\ref[src];religion=1'>[pref.religion]</a><br/>",
 		"<br/><b>Records</b>:<br/>"
 	)
@@ -150,18 +142,6 @@
 			pref.citizenship = choice
 		return TOPIC_REFRESH
 
-	else if(href_list["faction"])
-		var/choice = input(user, "Please choose a faction to work for.", "Character Preference", pref.faction) as null|anything in faction_choices + list("None","Other")
-		if(!choice || !CanUseTopic(user))
-			return TOPIC_NOACTION
-		if(choice == "Other")
-			var/raw_choice = sanitize(input(user, "Please enter a faction.", "Character Preference")  as text|null, MAX_NAME_LEN)
-			if(raw_choice)
-				pref.faction = raw_choice
-		else
-			pref.faction = choice
-		return TOPIC_REFRESH
-
 	else if(href_list["religion"])
 		var/choice = input(user, "Please choose a religion.", "Character Preference", pref.religion) as null|anything in religion_choices + list("None","Other")
 		if(!choice || !CanUseTopic(user))