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/DueyHandler.java

@@ -33,7 +33,7 @@ public final class DueyHandler extends AbstractMaplePacketHandler {
     @Override
     public final void handlePacket(SeekableLittleEndianAccessor slea, MapleClient c) {
     	if (!YamlConfig.config.server.USE_DUEY){
-            c.announce(PacketCreator.enableActions());
+            c.sendPacket(PacketCreator.enableActions());
             return;
     	}