Updates Message Packets (#321)

### API Breaking Change
Combined `AsciiMessage` and `UnicodeMessage` into a single function that takes two arguments, `bool ascii` and `string lang`. Lang can be null (or anything) if ascii is true. 

- [X] Changes message packets
- [X] Cleans up some code
- [X] Uses benchmarks to determine if the spanwriter + copyfrom

Projects/UOContent/Mobiles/Vendors/NPC/Guildmasters/BaseGuildmaster.cs

@@ -48,19 +48,16 @@ namespace Server.Mobiles
 
         public virtual void SayPriceTo(Mobile m)
         {
-            m.Send(
-                new MessageLocalizedAffix(
-                    Serial,
-                    Body,
-                    MessageType.Regular,
-                    SpeechHue,
-                    3,
-                    1008052,
-                    Name,
-                    AffixType.Append,
-                    JoinCost.ToString(),
-                    ""
-                )
+            m.NetState.SendMessageLocalizedAffix(
+                Serial,
+                Body,
+                MessageType.Regular,
+                SpeechHue,
+                3,
+                1008052,
+                Name,
+                AffixType.Append,
+                JoinCost.ToString()
             );
         }