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/TransferNameResultHandler.java

@@ -35,6 +35,6 @@ public final class TransferNameResultHandler extends AbstractMaplePacketHandler
     @Override
     public final void handlePacket(SeekableLittleEndianAccessor slea, MapleClient c) {
         String name = slea.readMapleAsciiString();
-        c.announce(PacketCreator.sendNameTransferCheck(name, MapleCharacter.canCreateChar(name)));
+        c.sendPacket(PacketCreator.sendNameTransferCheck(name, MapleCharacter.canCreateChar(name)));
     }
 }