More concurrency fixes + Zombify + BPQ available

Fixed some inconsistencies due to race conditions in the project, added
Zombify monster effect, made BPQ available and some minor patches.

scripts/map/onFirstUserEnter/balog_summon.js

@@ -0,0 +1,13 @@
+importPackage(Packages.server.life);
+importPackage(Packages.tools);
+importPackage(Packages.server.events);
+
+function start(ms) {
+    try {
+        ms.getPlayer().resetEnteredScript();
+        ms.getPlayer().getClient().getSession().write(MaplePacketCreator.getClock(BalrogPQ.getSecondsLeft())); // 60 mins(1hr)
+        BalrogPQ.spawnBalrog(1, ms.getPlayer());
+    } catch(err) {
+        ms.getPlayer().dropMessage(err);
+    }
+}