All packet creating methods now create Packet instead of byte[]

This commit got way too big...
- Remove deprecated methods for sending packets
- Favor OutPacket & Packet over MaplePacketLittleEndianWriter, LittleEndianWriter, and byte array
- Split up some packet creating methods into separate classes

src/main/java/net/server/channel/handlers/AdminChatHandler.java

@@ -3,6 +3,7 @@ package net.server.channel.handlers;
 import client.MapleClient;
 import config.YamlConfig;
 import net.AbstractMaplePacketHandler;
+import net.packet.Packet;
 import tools.LogHelper;
 import tools.PacketCreator;
 import tools.data.input.SeekableLittleEndianAccessor;
@@ -21,7 +22,7 @@ public class AdminChatHandler extends AbstractMaplePacketHandler {
         byte mode = slea.readByte();
         //not saving slides...
         String message = slea.readMapleAsciiString();
-        byte[] packet = PacketCreator.serverNotice(slea.readByte(), message);//maybe I should make a check for the slea.readByte()... but I just hope gm's don't fuck things up :)
+        Packet packet = PacketCreator.serverNotice(slea.readByte(), message);//maybe I should make a check for the slea.readByte()... but I just hope gm's don't fuck things up :)
         switch (mode) {
             case 0:// /alertall, /noticeall, /slideall
                 c.getWorldServer().broadcastPacket(packet);