Autosave feature + Pet Ignore fix

Added experimental autosaver feature. Fixed pet ignore feature not
saving/loading data in some cases. Added concurrency protection for
inventory classes and monster book.

scripts/npc/9010022.js

@@ -22,7 +22,7 @@ function action(mode, type, selection) {
         else 
             status--; 
             if (status == 0) { 
-            if (cm.getLevel() < 20) { 
+            if (cm.getLevel() < 25) { 
                 cm.sendDimensionalMirror("#-1# There is no place for you to transport to from here."); 
                 cm.dispose(); 
             } else {