removes some legacy procs, adds some other procs

NUFC

removed add_lspace — unused
removed add_tspace — unused
removed invertHTML — unused
removed hsl2rgb — unimplemented

removed hex2num — replaced with define
removed num2hex — replaced with define
removed add_zero — replaced with pad_left
removed add_zero2 — replaced with pad_left
removes hex2rgb — replaced with behavior of rgb2num()
removes hex2rgb_r — replaced with behavior of rgb2num()
removes hex2rgb_g — replaced with behavior of rgb2num()
removes hex2rgb_b — replaced with behavior of rgb2num()
removes assorted inline list(rgb) > hex — replaced with behavior of rgb()
removes assorted inline rand > hex — replace with random_hex_text

added hex2num define
added num2hex define
added random_hex_text
added generate_padding
added pad_left
added pad_right

code/datums/datacore.dm

@@ -416,7 +416,8 @@ var/global/list/PDA_Manifest = list()
 	return
 
 /proc/generate_record_id()
-	return add_zero(num2hex(rand(1, 65535)), 4)	//no point generating higher numbers because of the limitations of num2hex
+	return "000[random_hex_text(3, TRUE)]"
+
 
 /datum/datacore/proc/CreateGeneralRecord(var/mob/living/carbon/human/H, var/id, var/hidden)
 	ResetPDAManifest()
@@ -431,7 +432,7 @@ var/global/list/PDA_Manifest = list()
 		side = icon('html/images/no_image32.png')
 
 	if(!id)
-		id = text("[]", add_zero(num2hex(rand(1, 65536)), 4))
+		id = generate_record_id()
 	var/datum/data/record/G = new /datum/data/record()
 	G.name = "Employee Record #[id]"
 	G.fields["name"] = "New Record"