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/ItemMoveHandler.java

@@ -37,7 +37,7 @@ public final class ItemMoveHandler extends AbstractMaplePacketHandler {
     public final void handlePacket(SeekableLittleEndianAccessor slea, MapleClient c) {
         slea.skip(4);
         if(c.getPlayer().getAutobanManager().getLastSpam(6) + 300 > currentServerTime()) {
-            c.announce(PacketCreator.enableActions());
+            c.sendPacket(PacketCreator.enableActions());
             return;
         }