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/client/command/commands/gm3/MaxEnergyCommand.java

@@ -37,6 +37,6 @@ public class MaxEnergyCommand extends Command {
     public void execute(MapleClient c, String[] params) {
         MapleCharacter player = c.getPlayer();
         c.getPlayer().setDojoEnergy(10000);
-        c.announce(PacketCreator.getEnergy("energy", 10000));
+        c.sendPacket(PacketCreator.getEnergy("energy", 10000));
     }
 }