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/MobDamageMobFriendlyHandler.java

@@ -84,6 +84,6 @@ public final class MobDamageMobFriendlyHandler extends AbstractMaplePacketHandle
                 }
 
 		map.broadcastMessage(PacketCreator.MobDamageMobFriendly(monster, damage, remainingHp), monster.getPosition());
-		c.announce(PacketCreator.enableActions());
+		c.sendPacket(PacketCreator.enableActions());
 	}
 }