Skillbook announcer update + Encoded temporary mob buffs + Slot gains patch

Encoded temporary mob buffs on mob control request/spawn packets.
Improved scroll generator NPC, now testing other bucket set possibilities.
Fixed slot gain method recently updated leading to a temporary visual glitch (inventory would show as normal after relogin).
Reviewed mobid check by name, no longer trying to generate a whole mob instance for info retrieval.
Added debuff purge when applying a buyback.
Reviewed skillbook announcer not informing properly storybooks, reactor or script loots.
Fixed autoaggro not working properly as soon as a player enters the field.
Fixed "fake" mobs disappearing as soon as its controller changes.

src/net/server/task/RankingLoginTask.java

@@ -28,7 +28,6 @@ import java.sql.SQLException;
 import client.MapleJob;
 import config.YamlConfig;
 import tools.DatabaseConnection;
-import constants.net.ServerConstants;
 import net.server.Server;
 
 /**