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/PartySearchStartHandler.java

@@ -44,19 +44,19 @@ public class PartySearchStartHandler extends AbstractMaplePacketHandler {
             MapleCharacter chr = c.getPlayer();
             if (min > max) {
                 chr.dropMessage(1, "The min. value is higher than the max!");
-                c.announce(PacketCreator.enableActions());
+                c.sendPacket(PacketCreator.enableActions());
                 return;
             }
 
             if (max - min > 30) {
                 chr.dropMessage(1, "You can only search for party members within a range of 30 levels.");
-                c.announce(PacketCreator.enableActions());
+                c.sendPacket(PacketCreator.enableActions());
                 return;
             }
 
             if (chr.getLevel() < min || chr.getLevel() > max) {
                 chr.dropMessage(1, "The range of level for search has to include your own level.");
-                c.announce(PacketCreator.enableActions());
+                c.sendPacket(PacketCreator.enableActions());
                 return;
             }