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/scripting/portal/PortalPlayerInteraction.java

@@ -78,6 +78,6 @@ public class PortalPlayerInteraction extends AbstractPlayerInteraction {
     }
 
     public void playPortalSound() {
-        c.announce(PacketCreator.playPortalSound());
+        c.sendPacket(PacketCreator.playPortalSound());
     }
 }